SureshRamisetti – Best DevOps

Suresh-Post Assessment

SureshRamisetti — Fri, 06 Aug 2021 06:22:30 +0000

Email : sureshramisett.br@gmail.com

Docker Quiz -2 Post assessment :

Kubernetes Quiz -2 Post assessment :

List out top 15 commands in VMware Tanzu Application service aka PCF.

	
kapp deploy -a cf -f ./cf-for-k8s-rendered.yml -y
cf api --skip-ssl-validation https://api.vcap.me
CF_ADMIN_PASSWORD="$(bosh interpolate ./cf-install-values.yml --path /cf_admin_password)"
cf auth admin "$CF_ADMIN_PASSWORD"
cf enable-feature-flag diego_docker 
cf create-org test-org
cf create-space -o test-org test-space
cf target -o test-org -s test-space
cf push test-node-app -p ./tests/smoke/assets/test-node-app
cf push APP-NAME
cf apps
cf version
cf org-quotas
cf orgs
cf org
cf org-users
cf spaces

APPS:
   apps                                   List all apps in the target space
   app                                    Display health and status for an app
   create-app                             Create an Application in the target space

   push                                   Push a new app or sync changes to an existing app
   scale                                  Change or view the instance count, disk space limit, and memory limit for an app
   delete                                 Delete an app
   rename                                 Rename an app

   cancel-deployment                      Cancel the most recent deployment for an app. Resets the current droplet to the previous deployment's droplet.

   start                                  Start an app
   stop                                   Stop an app
   restart                                Stop all instances of the app, then start them again.
   stage-package                          Stage a package into a droplet
   restage                                Stage the app's latest package into a droplet and restart the app with this new droplet and updated configuration (environment variables, service bindings, buildpack, stack, etc.).
   restart-app-instance                   Terminate, then instantiate an app instance

   run-task                               Run a one-off task on an app
   tasks                                  List tasks of an app
   terminate-task                         Terminate a running task of an app

   packages                               List packages of an app
   create-package                         Uploads a Package

   droplets                               List droplets of an app
   set-droplet                            Set the droplet used to run an app
   download-droplet                       Download an application droplet

   events                                 Show recent app events
   logs                                   Tail or show recent logs for an app

   env                                    Show all env variables for an app
   set-env                                Set an env variable for an app
   unset-env                              Remove an env variable from an app

   stacks                                 List all stacks (a stack is a pre-built file system, including an operating system, that can run apps)
   stack                                  Show information for a stack (a stack is a pre-built file system, including an operating system, that can run apps)

   copy-source                            Copies the source code of an application to another existing application and restages that application
   create-app-manifest                    Create an app manifest for an app that has been pushed successfully

   get-health-check                       Show the type of health check performed on an app
   set-health-check                       Change type of health check performed on an app's process
   enable-ssh                             Enable ssh for the application
   disable-ssh                            Disable ssh for the application
   ssh-enabled                            Reports whether SSH is enabled on an application container instance
   ssh                                    SSH to an application container instance

SERVICES:
   marketplace                            List available offerings in the marketplace
   services                               List all service instances in the target space
   service                                Show service instance info

   create-service                         Create a service instance
   update-service                         Update a service instance
   delete-service                         Delete a service instance
   rename-service                         Rename a service instance

   create-service-key                     Create key for a service instance
   service-keys                           List keys for a service instance
   service-key                            Show service key info
   delete-service-key                     Delete a service key

   bind-service                           Bind a service instance to an app
   unbind-service                         Unbind a service instance from an app

   bind-route-service                     Bind a service instance to an HTTP route
   unbind-route-service                   Unbind a service instance from an HTTP route

   create-user-provided-service           Make a user-provided service instance available to CF apps
   update-user-provided-service           Update user-provided service instance

   share-service                          Share a service instance with another space
   unshare-service                        Unshare a shared service instance from a space

Kubernetes Lab-Day 7

SureshRamisetti — Tue, 27 Jul 2021 05:16:50 +0000

Kubernetes Lab -Day6 Suresh

SureshRamisetti — Mon, 26 Jul 2021 04:34:43 +0000

[root@sureshmaster ~]# mkdir suresh
[root@sureshmaster ~]# cd suresh
[root@sureshmaster suresh]# vi pod.yaml
[root@sureshmaster suresh]# ls
pod.yaml
[root@sureshmaster suresh]# kubectl get ns
NAME              STATUS   AGE
default           Active   2d21h
kube-node-lease   Active   2d21h
kube-public       Active   2d21h
kube-system       Active   2d21h
[root@sureshmaster suresh]# kubectl create ns suresh
namespace/suresh created
[root@sureshmaster suresh]# kubectl get ns
NAME              STATUS   AGE
default           Active   2d21h
kube-node-lease   Active   2d21h
kube-public       Active   2d21h
kube-system       Active   2d21h
suresh            Active   4s
[root@sureshmaster suresh]# kubectl get pods
No resources found in default namespace.
[root@sureshmaster suresh]# kubectl get pods -n=suresh
No resources found in suresh namespace.
[root@sureshmaster suresh]# kubectl get pods -n=dev
No resources found in dev namespace.
[root@sureshmaster suresh]# kubectl create -f pod.yaml
pod/nodehelloworld.example.com created
[root@sureshmaster suresh]# kubectl create -f pod.yaml -n=suresh
pod/nodehelloworld.example.com created
[root@sureshmaster suresh]# kubectl get pods -n=suresh
NAME                         READY   STATUS    RESTARTS   AGE
nodehelloworld.example.com   1/1     Running   0          9s
[root@sureshmaster suresh]# kubectl get pods -n=suresh
NAME                         READY   STATUS    RESTARTS   AGE
nodehelloworld.example.com   1/1     Running   0          14s
[root@sureshmaster suresh]# kubectl get pods
NAME                         READY   STATUS    RESTARTS   AGE
nodehelloworld.example.com   1/1     Running   0          37s
[root@sureshmaster suresh]# kubectl get pods -n=suresh,dev
No resources found in suresh,dev namespace.
[root@sureshmaster suresh]# kubectl get pods -all-namespaces
Error: unknown shorthand flag: 'a' in -all-namespaces
See 'kubectl get --help' for usage.
[root@sureshmaster suresh]# kubectl get pods --all-namespaces
NAMESPACE     NAME                                   READY   STATUS    RESTARTS   AGE
default       nodehelloworld.example.com             1/1     Running   0          81s
kube-system   coredns-558bd4d5db-48jwt               1/1     Running   0          2d21h
kube-system   coredns-558bd4d5db-ntpbc               1/1     Running   0          2d21h
kube-system   etcd-sureshmaster                      1/1     Running   0          2d21h
kube-system   kube-apiserver-sureshmaster            1/1     Running   0          2d21h
kube-system   kube-controller-manager-sureshmaster   1/1     Running   0          2d21h
kube-system   kube-proxy-9vtq5                       1/1     Running   0          2d21h
kube-system   kube-proxy-lv4nr                       1/1     Running   0          2d21h
kube-system   kube-scheduler-sureshmaster            1/1     Running   0          2d21h
kube-system   weave-net-9h6nd                        2/2     Running   1          2d21h
kube-system   weave-net-pbc92                        2/2     Running   0          2d21h
suresh        nodehelloworld.example.com             1/1     Running   0          62s
[root@sureshmaster suresh]# kubectl get pods -o wide
NAME                         READY   STATUS    RESTARTS   AGE   IP          NODE           NOMINATED NODE   READINESS GATES
nodehelloworld.example.com   1/1     Running   0          99s   10.44.0.1   sureshworker              
[root@sureshmaster suresh]# ping 10.44.0.1
PING 10.44.0.1 (10.44.0.1) 56(84) bytes of data.
64 bytes from 10.44.0.1: icmp_seq=1 ttl=64 time=1.38 ms
64 bytes from 10.44.0.1: icmp_seq=2 ttl=64 time=0.636 ms
64 bytes from 10.44.0.1: icmp_seq=3 ttl=64 time=0.627 ms
64 bytes from 10.44.0.1: icmp_seq=4 ttl=64 time=0.751 ms
64 bytes from 10.44.0.1: icmp_seq=5 ttl=64 time=0.620 ms
64 bytes from 10.44.0.1: icmp_seq=6 ttl=64 time=1.14 ms
64 bytes from 10.44.0.1: icmp_seq=7 ttl=64 time=0.573 ms
64 bytes from 10.44.0.1: icmp_seq=8 ttl=64 time=0.619 ms
64 bytes from 10.44.0.1: icmp_seq=9 ttl=64 time=1.20 ms
64 bytes from 10.44.0.1: icmp_seq=10 ttl=64 time=0.813 ms
64 bytes from 10.44.0.1: icmp_seq=11 ttl=64 time=1.13 ms
64 bytes from 10.44.0.1: icmp_seq=12 ttl=64 time=0.548 ms
64 bytes from 10.44.0.1: icmp_seq=13 ttl=64 time=1.23 ms
64 bytes from 10.44.0.1: icmp_seq=14 ttl=64 time=0.665 ms
64 bytes from 10.44.0.1: icmp_seq=15 ttl=64 time=1.16 ms
64 bytes from 10.44.0.1: icmp_seq=16 ttl=64 time=0.917 ms
64 bytes from 10.44.0.1: icmp_seq=17 ttl=64 time=0.528 ms
64 bytes from 10.44.0.1: icmp_seq=18 ttl=64 time=0.785 ms
64 bytes from 10.44.0.1: icmp_seq=19 ttl=64 time=1.13 ms
64 bytes from 10.44.0.1: icmp_seq=20 ttl=64 time=0.612 ms
64 bytes from 10.44.0.1: icmp_seq=21 ttl=64 time=0.865 ms
64 bytes from 10.44.0.1: icmp_seq=22 ttl=64 time=0.679 ms
64 bytes from 10.44.0.1: icmp_seq=23 ttl=64 time=0.604 ms
64 bytes from 10.44.0.1: icmp_seq=24 ttl=64 time=0.637 ms
64 bytes from 10.44.0.1: icmp_seq=25 ttl=64 time=1.19 ms
64 bytes from 10.44.0.1: icmp_seq=26 ttl=64 time=0.500 ms
64 bytes from 10.44.0.1: icmp_seq=27 ttl=64 time=0.930 ms
64 bytes from 10.44.0.1: icmp_seq=28 ttl=64 time=0.641 ms
64 bytes from 10.44.0.1: icmp_seq=29 ttl=64 time=0.801 ms
64 bytes from 10.44.0.1: icmp_seq=30 ttl=64 time=0.624 ms
64 bytes from 10.44.0.1: icmp_seq=31 ttl=64 time=0.735 ms
64 bytes from 10.44.0.1: icmp_seq=32 ttl=64 time=1.15 ms
64 bytes from 10.44.0.1: icmp_seq=33 ttl=64 time=1.03 ms
64 bytes from 10.44.0.1: icmp_seq=34 ttl=64 time=0.644 ms
64 bytes from 10.44.0.1: icmp_seq=35 ttl=64 time=0.894 ms
64 bytes from 10.44.0.1: icmp_seq=36 ttl=64 time=0.610 ms
64 bytes from 10.44.0.1: icmp_seq=37 ttl=64 time=0.612 ms
64 bytes from 10.44.0.1: icmp_seq=38 ttl=64 time=0.910 ms
64 bytes from 10.44.0.1: icmp_seq=39 ttl=64 time=0.955 ms
64 bytes from 10.44.0.1: icmp_seq=40 ttl=64 time=0.847 ms
64 bytes from 10.44.0.1: icmp_seq=41 ttl=64 time=1.19 ms
64 bytes from 10.44.0.1: icmp_seq=42 ttl=64 time=1.23 ms
64 bytes from 10.44.0.1: icmp_seq=43 ttl=64 time=1.10 ms
64 bytes from 10.44.0.1: icmp_seq=44 ttl=64 time=0.915 ms
64 bytes from 10.44.0.1: icmp_seq=45 ttl=64 time=1.05 ms
64 bytes from 10.44.0.1: icmp_seq=46 ttl=64 time=0.462 ms
64 bytes from 10.44.0.1: icmp_seq=47 ttl=64 time=0.979 ms
64 bytes from 10.44.0.1: icmp_seq=48 ttl=64 time=0.841 ms
64 bytes from 10.44.0.1: icmp_seq=49 ttl=64 time=1.13 ms
64 bytes from 10.44.0.1: icmp_seq=50 ttl=64 time=0.605 ms
64 bytes from 10.44.0.1: icmp_seq=51 ttl=64 time=1.02 ms
64 bytes from 10.44.0.1: icmp_seq=52 ttl=64 time=1.24 ms
64 bytes from 10.44.0.1: icmp_seq=53 ttl=64 time=1.13 ms
64 bytes from 10.44.0.1: icmp_seq=54 ttl=64 time=1.36 ms
64 bytes from 10.44.0.1: icmp_seq=55 ttl=64 time=1.12 ms
64 bytes from 10.44.0.1: icmp_seq=56 ttl=64 time=1.16 ms
64 bytes from 10.44.0.1: icmp_seq=57 ttl=64 time=0.920 ms
64 bytes from 10.44.0.1: icmp_seq=58 ttl=64 time=0.632 ms
64 bytes from 10.44.0.1: icmp_seq=59 ttl=64 time=1.19 ms
64 bytes from 10.44.0.1: icmp_seq=60 ttl=64 time=0.523 ms
64 bytes from 10.44.0.1: icmp_seq=61 ttl=64 time=1.14 ms
64 bytes from 10.44.0.1: icmp_seq=62 ttl=64 time=0.824 ms
64 bytes from 10.44.0.1: icmp_seq=63 ttl=64 time=1.25 ms
64 bytes from 10.44.0.1: icmp_seq=64 ttl=64 time=0.612 ms
64 bytes from 10.44.0.1: icmp_seq=65 ttl=64 time=0.828 ms
64 bytes from 10.44.0.1: icmp_seq=66 ttl=64 time=0.601 ms
64 bytes from 10.44.0.1: icmp_seq=67 ttl=64 time=0.584 ms
64 bytes from 10.44.0.1: icmp_seq=68 ttl=64 time=0.525 ms
64 bytes from 10.44.0.1: icmp_seq=69 ttl=64 time=0.912 ms
64 bytes from 10.44.0.1: icmp_seq=70 ttl=64 time=0.912 ms
64 bytes from 10.44.0.1: icmp_seq=71 ttl=64 time=1.00 ms
64 bytes from 10.44.0.1: icmp_seq=72 ttl=64 time=1.19 ms
64 bytes from 10.44.0.1: icmp_seq=73 ttl=64 time=1.08 ms
64 bytes from 10.44.0.1: icmp_seq=74 ttl=64 time=1.16 ms
64 bytes from 10.44.0.1: icmp_seq=75 ttl=64 time=0.940 ms
64 bytes from 10.44.0.1: icmp_seq=76 ttl=64 time=0.642 ms
64 bytes from 10.44.0.1: icmp_seq=77 ttl=64 time=1.03 ms
64 bytes from 10.44.0.1: icmp_seq=78 ttl=64 time=0.795 ms
64 bytes from 10.44.0.1: icmp_seq=79 ttl=64 time=0.909 ms
64 bytes from 10.44.0.1: icmp_seq=80 ttl=64 time=0.729 ms
64 bytes from 10.44.0.1: icmp_seq=81 ttl=64 time=0.899 ms
64 bytes from 10.44.0.1: icmp_seq=82 ttl=64 time=0.582 ms
64 bytes from 10.44.0.1: icmp_seq=83 ttl=64 time=0.610 ms
64 bytes from 10.44.0.1: icmp_seq=84 ttl=64 time=0.615 ms
64 bytes from 10.44.0.1: icmp_seq=85 ttl=64 time=0.629 ms
64 bytes from 10.44.0.1: icmp_seq=86 ttl=64 time=0.691 ms
64 bytes from 10.44.0.1: icmp_seq=87 ttl=64 time=0.760 ms
^C
--- 10.44.0.1 ping statistics ---
87 packets transmitted, 87 received, 0% packet loss, time 86084ms
rtt min/avg/max/mdev = 0.462/0.865/1.388/0.245 ms
[root@sureshmaster suresh]# kubectl get pods
NAME                         READY   STATUS    RESTARTS   AGE
nodehelloworld.example.com   1/1     Running   0          3m28s
[root@sureshmaster suresh]# kubectl edit pod nodehelloworld.example.com
pod/nodehelloworld.example.com edited
[root@sureshmaster suresh]# kubectl edit pod --show-labels
Error: unknown flag: --show-labels
See 'kubectl edit --help' for usage.
[root@sureshmaster suresh]# kubectl get  pod --show-labels
NAME                         READY   STATUS    RESTARTS   AGE     LABELS
nodehelloworld.example.com   1/1     Running   0          4m59s   app=helloworld,server=apiserver
[root@sureshmaster suresh]# kubectl -h
kubectl controls the Kubernetes cluster manager.

 Find more information at: https://kubernetes.io/docs/reference/kubectl/overview/

Basic Commands (Beginner):
  create        Create a resource from a file or from stdin.
  expose        Take a replication controller, service, deployment or pod and expose it as a new Kubernetes Service
  run           Run a particular image on the cluster
  set           Set specific features on objects

Basic Commands (Intermediate):
  explain       Documentation of resources
  get           Display one or many resources
  edit          Edit a resource on the server
  delete        Delete resources by filenames, stdin, resources and names, or by resources and label selector

Deploy Commands:
  rollout       Manage the rollout of a resource
  scale         Set a new size for a Deployment, ReplicaSet or Replication Controller
  autoscale     Auto-scale a Deployment, ReplicaSet, StatefulSet, or ReplicationController

Cluster Management Commands:
  certificate   Modify certificate resources.
  cluster-info  Display cluster info
  top           Display Resource (CPU/Memory) usage.
  cordon        Mark node as unschedulable
  uncordon      Mark node as schedulable
  drain         Drain node in preparation for maintenance
  taint         Update the taints on one or more nodes

Troubleshooting and Debugging Commands:
  describe      Show details of a specific resource or group of resources
  logs          Print the logs for a container in a pod
  attach        Attach to a running container
  exec          Execute a command in a container
  port-forward  Forward one or more local ports to a pod
  proxy         Run a proxy to the Kubernetes API server
  cp            Copy files and directories to and from containers.
  auth          Inspect authorization
  debug         Create debugging sessions for troubleshooting workloads and nodes

Advanced Commands:
  diff          Diff live version against would-be applied version
  apply         Apply a configuration to a resource by filename or stdin
  patch         Update field(s) of a resource
  replace       Replace a resource by filename or stdin
  wait          Experimental: Wait for a specific condition on one or many resources.
  kustomize     Build a kustomization target from a directory or URL.

Settings Commands:
  label         Update the labels on a resource
  annotate      Update the annotations on a resource
  completion    Output shell completion code for the specified shell (bash or zsh)

Other Commands:
  api-resources Print the supported API resources on the server
  api-versions  Print the supported API versions on the server, in the form of "group/version"
  config        Modify kubeconfig files
  plugin        Provides utilities for interacting with plugins.
  version       Print the client and server version information

Usage:
  kubectl [flags] [options]

Use "kubectl  --help" for more information about a given command.
Use "kubectl options" for a list of global command-line options (applies to all commands).
[root@sureshmaster suresh]# kubectl get -h
Display one or many resources

 Prints a table of the most important information about the specified resources. You can filter the list using a label
selector and the --selector flag. If the desired resource type is namespaced you will only see results in your current
namespace unless you pass --all-namespaces.

 Uninitialized objects are not shown unless --include-uninitialized is passed.

 By specifying the output as 'template' and providing a Go template as the value of the --template flag, you can filter
the attributes of the fetched resources.

Use "kubectl api-resources" for a complete list of supported resources.

Examples:
  # List all pods in ps output format.
  kubectl get pods

  # List all pods in ps output format with more information (such as node name).
  kubectl get pods -o wide

  # List a single replication controller with specified NAME in ps output format.
  kubectl get replicationcontroller web

  # List deployments in JSON output format, in the "v1" version of the "apps" API group:
  kubectl get deployments.v1.apps -o json

  # List a single pod in JSON output format.
  kubectl get -o json pod web-pod-13je7

  # List a pod identified by type and name specified in "pod.yaml" in JSON output format.
  kubectl get -f pod.yaml -o json

  # List resources from a directory with kustomization.yaml - e.g. dir/kustomization.yaml.
  kubectl get -k dir/

  # Return only the phase value of the specified pod.
  kubectl get -o template pod/web-pod-13je7 --template={{.status.phase}}

  # List resource information in custom columns.
  kubectl get pod test-pod -o custom-columns=CONTAINER:.spec.containers[0].name,IMAGE:.spec.containers[0].image

  # List all replication controllers and services together in ps output format.
  kubectl get rc,services

  # List one or more resources by their type and names.
  kubectl get rc/web service/frontend pods/web-pod-13je7

Options:
  -A, --all-namespaces=false: If present, list the requested object(s) across all namespaces. Namespace in current
context is ignored even if specified with --namespace.
      --allow-missing-template-keys=true: If true, ignore any errors in templates when a field or map key is missing in
the template. Only applies to golang and jsonpath output formats.
      --chunk-size=500: Return large lists in chunks rather than all at once. Pass 0 to disable. This flag is beta and
may change in the future.
      --field-selector='': Selector (field query) to filter on, supports '=', '==', and '!='.(e.g. --field-selector
key1=value1,key2=value2). The server only supports a limited number of field queries per type.
  -f, --filename=[]: Filename, directory, or URL to files identifying the resource to get from a server.
      --ignore-not-found=false: If the requested object does not exist the command will return exit code 0.
  -k, --kustomize='': Process the kustomization directory. This flag can't be used together with -f or -R.
  -L, --label-columns=[]: Accepts a comma separated list of labels that are going to be presented as columns. Names are
case-sensitive. You can also use multiple flag options like -L label1 -L label2...
      --no-headers=false: When using the default or custom-column output format, don't print headers (default print
headers).
  -o, --output='': Output format. One of:
json|yaml|wide|name|custom-columns=...|custom-columns-file=...|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=...
See custom columns [http://kubernetes.io/docs/user-guide/kubectl-overview/#custom-columns], golang template
[http://golang.org/pkg/text/template/#pkg-overview] and jsonpath template
[http://kubernetes.io/docs/user-guide/jsonpath].
      --output-watch-events=false: Output watch event objects when --watch or --watch-only is used. Existing objects are
output as initial ADDED events.
      --raw='': Raw URI to request from the server.  Uses the transport specified by the kubeconfig file.
  -R, --recursive=false: Process the directory used in -f, --filename recursively. Useful when you want to manage
related manifests organized within the same directory.
  -l, --selector='': Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)
      --server-print=true: If true, have the server return the appropriate table output. Supports extension APIs and
CRDs.
      --show-kind=false: If present, list the resource type for the requested object(s).
      --show-labels=false: When printing, show all labels as the last column (default hide labels column)
      --show-managed-fields=false: If true, keep the managedFields when printing objects in JSON or YAML format.
      --sort-by='': If non-empty, sort list types using this field specification.  The field specification is expressed
as a JSONPath expression (e.g. '{.metadata.name}'). The field in the API resource specified by this JSONPath expression
must be an integer or a string.
      --template='': Template string or path to template file to use when -o=go-template, -o=go-template-file. The
template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
  -w, --watch=false: After listing/getting the requested object, watch for changes. Uninitialized objects are excluded
if no object name is provided.
      --watch-only=false: Watch for changes to the requested object(s), without listing/getting first.

Usage:
  kubectl get
[(-o|--output=)json|yaml|wide|custom-columns=...|custom-columns-file=...|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=...]
(TYPE[.VERSION][.GROUP] [NAME | -l label] | TYPE[.VERSION][.GROUP]/NAME ...) [flags] [options]

Use "kubectl options" for a list of global command-line options (applies to all commands).
[root@sureshmaster suresh]# kubectl get pods -h
Display one or many resources

 Prints a table of the most important information about the specified resources. You can filter the list using a label
selector and the --selector flag. If the desired resource type is namespaced you will only see results in your current
namespace unless you pass --all-namespaces.

 Uninitialized objects are not shown unless --include-uninitialized is passed.

 By specifying the output as 'template' and providing a Go template as the value of the --template flag, you can filter
the attributes of the fetched resources.

Use "kubectl api-resources" for a complete list of supported resources.

Examples:
  # List all pods in ps output format.
  kubectl get pods

  # List all pods in ps output format with more information (such as node name).
  kubectl get pods -o wide

  # List a single replication controller with specified NAME in ps output format.
  kubectl get replicationcontroller web

  # List deployments in JSON output format, in the "v1" version of the "apps" API group:
  kubectl get deployments.v1.apps -o json

  # List a single pod in JSON output format.
  kubectl get -o json pod web-pod-13je7

  # List a pod identified by type and name specified in "pod.yaml" in JSON output format.
  kubectl get -f pod.yaml -o json

  # List resources from a directory with kustomization.yaml - e.g. dir/kustomization.yaml.
  kubectl get -k dir/

  # Return only the phase value of the specified pod.
  kubectl get -o template pod/web-pod-13je7 --template={{.status.phase}}

  # List resource information in custom columns.
  kubectl get pod test-pod -o custom-columns=CONTAINER:.spec.containers[0].name,IMAGE:.spec.containers[0].image

  # List all replication controllers and services together in ps output format.
  kubectl get rc,services

  # List one or more resources by their type and names.
  kubectl get rc/web service/frontend pods/web-pod-13je7

Options:
  -A, --all-namespaces=false: If present, list the requested object(s) across all namespaces. Namespace in current
context is ignored even if specified with --namespace.
      --allow-missing-template-keys=true: If true, ignore any errors in templates when a field or map key is missing in
the template. Only applies to golang and jsonpath output formats.
      --chunk-size=500: Return large lists in chunks rather than all at once. Pass 0 to disable. This flag is beta and
may change in the future.
      --field-selector='': Selector (field query) to filter on, supports '=', '==', and '!='.(e.g. --field-selector
key1=value1,key2=value2). The server only supports a limited number of field queries per type.
  -f, --filename=[]: Filename, directory, or URL to files identifying the resource to get from a server.
      --ignore-not-found=false: If the requested object does not exist the command will return exit code 0.
  -k, --kustomize='': Process the kustomization directory. This flag can't be used together with -f or -R.
  -L, --label-columns=[]: Accepts a comma separated list of labels that are going to be presented as columns. Names are
case-sensitive. You can also use multiple flag options like -L label1 -L label2...
      --no-headers=false: When using the default or custom-column output format, don't print headers (default print
headers).
  -o, --output='': Output format. One of:
json|yaml|wide|name|custom-columns=...|custom-columns-file=...|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=...
See custom columns [http://kubernetes.io/docs/user-guide/kubectl-overview/#custom-columns], golang template
[http://golang.org/pkg/text/template/#pkg-overview] and jsonpath template
[http://kubernetes.io/docs/user-guide/jsonpath].
      --output-watch-events=false: Output watch event objects when --watch or --watch-only is used. Existing objects are
output as initial ADDED events.
      --raw='': Raw URI to request from the server.  Uses the transport specified by the kubeconfig file.
  -R, --recursive=false: Process the directory used in -f, --filename recursively. Useful when you want to manage
related manifests organized within the same directory.
  -l, --selector='': Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)
      --server-print=true: If true, have the server return the appropriate table output. Supports extension APIs and
CRDs.
      --show-kind=false: If present, list the resource type for the requested object(s).
      --show-labels=false: When printing, show all labels as the last column (default hide labels column)
      --show-managed-fields=false: If true, keep the managedFields when printing objects in JSON or YAML format.
      --sort-by='': If non-empty, sort list types using this field specification.  The field specification is expressed
as a JSONPath expression (e.g. '{.metadata.name}'). The field in the API resource specified by this JSONPath expression
must be an integer or a string.
      --template='': Template string or path to template file to use when -o=go-template, -o=go-template-file. The
template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
  -w, --watch=false: After listing/getting the requested object, watch for changes. Uninitialized objects are excluded
if no object name is provided.
      --watch-only=false: Watch for changes to the requested object(s), without listing/getting first.

Usage:
  kubectl get
[(-o|--output=)json|yaml|wide|custom-columns=...|custom-columns-file=...|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=...]
(TYPE[.VERSION][.GROUP] [NAME | -l label] | TYPE[.VERSION][.GROUP]/NAME ...) [flags] [options]

Use "kubectl options" for a list of global command-line options (applies to all commands).
[root@sureshmaster suresh]# vi pod.yml
[root@sureshmaster suresh]# vi pod.yaml
[root@sureshmaster suresh]# kubectl apply -f pod.yml
error: the path "pod.yml" does not exist
[root@sureshmaster suresh]# kubectl apply -f pod.yaml
error: error validating "pod.yaml": error validating data: ValidationError(Pod.metadata): unknown field "server" in io.k8s.apimachinery.pkg.apis.meta.v1.ObjectMeta; if you choose to ignore these errors, turn validation off with --validate=false
[root@sureshmaster suresh]# kubectl get pods
NAME                         READY   STATUS    RESTARTS   AGE
nodehelloworld.example.com   1/1     Running   0          8m28s
[root@sureshmaster suresh]# kubectl delete pod nodehelloworld.example.com
pod "nodehelloworld.example.com" deleted
[root@sureshmaster suresh]# kubectl delete pod nodehelloworld.example.com -n=rajesh
Error from server (NotFound): pods "nodehelloworld.example.com" not found
[root@sureshmaster suresh]# kubectl delete pod nodehelloworld.example.com -n=suresh
pod "nodehelloworld.example.com" deleted
[root@sureshmaster suresh]# kubectl delete pod nodehelloworld.example.com -n=sures
Error from server (NotFound): pods "nodehelloworld.example.com" not found
[root@sureshmaster suresh]# kubectl get pods -all-namespaces
Error: unknown shorthand flag: 'a' in -all-namespaces
See 'kubectl get --help' for usage.
[root@sureshmaster suresh]# kubectl get pods --all-namespaces
NAMESPACE     NAME                                   READY   STATUS    RESTARTS   AGE
kube-system   coredns-558bd4d5db-48jwt               1/1     Running   0          2d21h
kube-system   coredns-558bd4d5db-ntpbc               1/1     Running   0          2d21h
kube-system   etcd-sureshmaster                      1/1     Running   0          2d21h
kube-system   kube-apiserver-sureshmaster            1/1     Running   0          2d21h
kube-system   kube-controller-manager-sureshmaster   1/1     Running   0          2d21h
kube-system   kube-proxy-9vtq5                       1/1     Running   0          2d21h
kube-system   kube-proxy-lv4nr                       1/1     Running   0          2d21h
kube-system   kube-scheduler-sureshmaster            1/1     Running   0          2d21h
kube-system   weave-net-9h6nd                        2/2     Running   1          2d21h
kube-system   weave-net-pbc92                        2/2     Running   0          2d21h
[root@sureshmaster suresh]# history
    1  ifconfig
    2  yum update
    3  ifconfig
    4  exit
    5  hostnamectl set-hostname sureshmaster
    6  sudo -s
    7  exit
    8  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    9  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
   10  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
   11  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
   12  sudo yum install -y docker-ce
   13  sudo yum install docker-ce
   14  sudo systemctl enable docker
   15  sudo systemctl start docker
   16  docker -v
   17  docker info
   18  cat < /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kube*
EOF

   19  setenforce 0
   20  sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
   21  yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
   22  systemctl enable --now kubelet
   23  kubeadm init --ignore-preflight-errors all
   24  mkdir -p $HOME/.kube
   25  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
   26  sudo chown $(id -u):$(id -g) $HOME/.kube/config
   27  kubectl get nodes
   28  kubectl get pods --all-namespaces
   29  kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
   30  kubectl get nodes
   31  kubectl get pods --all-namespaces
   32  kubectl get nodes
   33  kubectl config view
   34  pwd
   35  mkdir suresh
   36  cd suresh
   37  vi pod.yaml
   38  ls
   39  kubectl get ns
   40  kubectl create ns suresh
   41  kubectl get ns
   42  kubectl get pods
   43  kubectl get pods -n=suresh
   44  kubectl get pods -n=dev
   45  kubectl create -f pod.yaml
   46  kubectl create -f pod.yaml -n=suresh
   47  kubectl get pods -n=suresh
   48  kubectl get pods
   49  kubectl get pods -n=suresh,dev
   50  kubectl get pods -all-namespaces
   51  kubectl get pods --all-namespaces
   52  kubectl get pods -o wide
   53  ping 10.44.0.1
   54  kubectl get pods
   55  kubectl edit pod nodehelloworld.example.com
   56  kubectl edit pod --show-labels
   57  kubectl get  pod --show-labels
   58  kubectl -h
   59  kubectl get -h
   60  kubectl get pods -h
   61  vi pod.yml
   62  vi pod.yaml
   63  kubectl apply -f pod.yml
   64  kubectl apply -f pod.yaml
   65  kubectl get pods
   66  kubectl delete pod nodehelloworld.example.com
   67  kubectl delete pod nodehelloworld.example.com -n=rajesh
   68  kubectl delete pod nodehelloworld.example.com -n=suresh
   69  kubectl delete pod nodehelloworld.example.com -n=sures
   70  kubectl get pods -all-namespaces
   71  kubectl get pods --all-namespaces
   72  history
[root@sureshmaster suresh]# \
>

Kubernetes Lab Day5-Suresh

SureshRamisetti — Fri, 23 Jul 2021 05:50:37 +0000

Kubernetes Lab Day5-Suresh

Master Node :

login as: root
root@192.168.2.14's password:
Last login: Fri Jul 23 11:52:13 2021
[root@sureshmaster ~]# sudo yum install -y yum-utils device-mapper-persistent-data lvm2
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.mirrors.estointernet.in
 * extras: centos.mirrors.estointernet.in
 * updates: mirrors.vhost.vn
Package yum-utils-1.1.31-54.el7_8.noarch already installed and latest version
Package device-mapper-persistent-data-0.8.5-3.el7_9.2.x86_64 already installed and latest version
Package 7:lvm2-2.02.187-6.el7_9.5.x86_64 already installed and latest version
Nothing to do
[root@sureshmaster ~]# sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror, langpacks
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@sureshmaster ~]# sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.mirrors.estointernet.in
 * extras: centos.mirrors.estointernet.in
 * updates: mirrors.vhost.vn
docker-ce-stable                                                                                                                                 | 3.5 kB  00:00:00
(1/2): docker-ce-stable/7/x86_64/primary_db                                                                                                      |  62 kB  00:00:00
(2/2): docker-ce-stable/7/x86_64/updateinfo                                                                                                      |   55 B  00:00:00
epel-release-latest-7.noarch.rpm                                                                                                                 |  15 kB  00:00:00
Examining /var/tmp/yum-root-vUVBgL/epel-release-latest-7.noarch.rpm: epel-release-7-13.noarch
Marking /var/tmp/yum-root-vUVBgL/epel-release-latest-7.noarch.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-13 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================================
 Package                                Arch                             Version                          Repository                                               Size
========================================================================================================================================================================
Installing:
 epel-release                           noarch                           7-13                             /epel-release-latest-7.noarch                            25 k

Transaction Summary
========================================================================================================================================================================
Install  1 Package

Total size: 25 k
Installed size: 25 k
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : epel-release-7-13.noarch                                                                                                                             1/1
  Verifying  : epel-release-7-13.noarch                                                                                                                             1/1

Installed:
  epel-release.noarch 0:7-13

Complete!
[root@sureshmaster ~]# sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
Loaded plugins: fastestmirror, langpacks
[root@sureshmaster ~]# sudo yum install -y docker-ce
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                                                                                                             | 8.2 kB  00:00:00
 * base: centos.mirrors.estointernet.in
 * epel: repos.del.extreme-ix.org
 * extras: centos.mirrors.estointernet.in
 * updates: mirrors.vhost.vn
epel                                                                                                                                             | 4.7 kB  00:00:00
(1/3): epel/x86_64/group_gz                                                                                                                      |  96 kB  00:00:00
epel/x86_64/updateinfo         FAILED
https://download.nus.edu.sg/mirror/epel/7/x86_64/repodata/f3ca66d8e33355652eb315a2ab2b8ede24a49902e7c3e29f00975d35460265f1-updateinfo.xml.bz2: [Errno 14] HTTPS Error 404 - Not Found
Trying other mirror.
To address this issue please refer to the below wiki article

https://wiki.centos.org/yum-errors

If above article doesn't help to resolve this issue please use https://bugs.centos.org/.

(2/3): epel/x86_64/updateinfo                                                                                                                    | 1.0 MB  00:00:03
(3/3): epel/x86_64/primary_db                                                                                                                    | 6.9 MB  00:00:16
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 3:20.10.7-3.el7 will be installed
--> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Processing Dependency: containerd.io >= 1.4.1 for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Processing Dependency: docker-ce-cli for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Processing Dependency: docker-ce-rootless-extras for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Running transaction check
---> Package container-selinux.noarch 2:2.119.2-1.911c772.el7_8 will be installed
---> Package containerd.io.x86_64 0:1.4.8-3.1.el7 will be installed
---> Package docker-ce-cli.x86_64 1:20.10.7-3.el7 will be installed
--> Processing Dependency: docker-scan-plugin(x86-64) for package: 1:docker-ce-cli-20.10.7-3.el7.x86_64
---> Package docker-ce-rootless-extras.x86_64 0:20.10.7-3.el7 will be installed
--> Processing Dependency: fuse-overlayfs >= 0.7 for package: docker-ce-rootless-extras-20.10.7-3.el7.x86_64
--> Processing Dependency: slirp4netns >= 0.4 for package: docker-ce-rootless-extras-20.10.7-3.el7.x86_64
--> Running transaction check
---> Package docker-scan-plugin.x86_64 0:0.8.0-3.el7 will be installed
---> Package fuse-overlayfs.x86_64 0:0.7.2-6.el7_8 will be installed
--> Processing Dependency: libfuse3.so.3(FUSE_3.2)(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
--> Processing Dependency: libfuse3.so.3(FUSE_3.0)(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
--> Processing Dependency: libfuse3.so.3()(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
---> Package slirp4netns.x86_64 0:0.4.3-4.el7_8 will be installed
--> Running transaction check
---> Package fuse3-libs.x86_64 0:3.6.1-4.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================================
 Package                                        Arch                        Version                                         Repository                             Size
========================================================================================================================================================================
Installing:
 docker-ce                                      x86_64                      3:20.10.7-3.el7                                 docker-ce-stable                       27 M
Installing for dependencies:
 container-selinux                              noarch                      2:2.119.2-1.911c772.el7_8                       extras                                 40 k
 containerd.io                                  x86_64                      1.4.8-3.1.el7                                   docker-ce-stable                       30 M
 docker-ce-cli                                  x86_64                      1:20.10.7-3.el7                                 docker-ce-stable                       33 M
 docker-ce-rootless-extras                      x86_64                      20.10.7-3.el7                                   docker-ce-stable                      9.2 M
 docker-scan-plugin                             x86_64                      0.8.0-3.el7                                     docker-ce-stable                      4.2 M
 fuse-overlayfs                                 x86_64                      0.7.2-6.el7_8                                   extras                                 54 k
 fuse3-libs                                     x86_64                      3.6.1-4.el7                                     extras                                 82 k
 slirp4netns                                    x86_64                      0.4.3-4.el7_8                                   extras                                 81 k

Transaction Summary
========================================================================================================================================================================
Install  1 Package (+8 Dependent packages)

Total download size: 103 M
Installed size: 421 M
Downloading packages:
(1/9): container-selinux-2.119.2-1.911c772.el7_8.noarch.rpm                                                                                      |  40 kB  00:00:00
warning: /var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-ce-20.10.7-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY6 MB  00:00:09 ETA
Public key for docker-ce-20.10.7-3.el7.x86_64.rpm is not installed
(2/9): docker-ce-20.10.7-3.el7.x86_64.rpm                                                                                                        |  27 MB  00:00:06
(3/9): containerd.io-1.4.8-3.1.el7.x86_64.rpm                                                                                                    |  30 MB  00:00:09
(4/9): docker-ce-rootless-extras-20.10.7-3.el7.x86_64.rpm                                                                                        | 9.2 MB  00:00:02
(5/9): fuse-overlayfs-0.7.2-6.el7_8.x86_64.rpm                                                                                                   |  54 kB  00:00:00
(6/9): slirp4netns-0.4.3-4.el7_8.x86_64.rpm                                                                                                      |  81 kB  00:00:00
(7/9): docker-scan-plugin-0.8.0-3.el7.x86_64.rpm                                                                                                 | 4.2 MB  00:00:01
(8/9): docker-ce-cli-20.10.7-3.el7.x86_64.rpm                                                                                                    |  33 MB  00:00:07
(9/9): fuse3-libs-3.6.1-4.el7.x86_64.rpm                                                                                                         |  82 kB  00:00:10
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                   4.6 MB/s | 103 MB  00:00:22
Retrieving key from https://download.docker.com/linux/centos/gpg
Importing GPG key 0x621E9F35:
 Userid     : "Docker Release (CE rpm) <docker@docker.com>"
 Fingerprint: 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35
 From       : https://download.docker.com/linux/centos/gpg
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                                                                                                   1/9
  Installing : containerd.io-1.4.8-3.1.el7.x86_64                                                                                                                   2/9
  Installing : 1:docker-ce-cli-20.10.7-3.el7.x86_64                                                                                                                 3/9
  Installing : docker-scan-plugin-0.8.0-3.el7.x86_64                                                                                                                4/9
  Installing : slirp4netns-0.4.3-4.el7_8.x86_64                                                                                                                     5/9
  Installing : fuse3-libs-3.6.1-4.el7.x86_64                                                                                                                        6/9
  Installing : fuse-overlayfs-0.7.2-6.el7_8.x86_64                                                                                                                  7/9
  Installing : 3:docker-ce-20.10.7-3.el7.x86_64                                                                                                                     8/9
  Installing : docker-ce-rootless-extras-20.10.7-3.el7.x86_64                                                                                                       9/9
  Verifying  : fuse3-libs-3.6.1-4.el7.x86_64                                                                                                                        1/9
  Verifying  : docker-scan-plugin-0.8.0-3.el7.x86_64                                                                                                                2/9
  Verifying  : containerd.io-1.4.8-3.1.el7.x86_64                                                                                                                   3/9
  Verifying  : slirp4netns-0.4.3-4.el7_8.x86_64                                                                                                                     4/9
  Verifying  : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                                                                                                   5/9
  Verifying  : 3:docker-ce-20.10.7-3.el7.x86_64                                                                                                                     6/9
  Verifying  : 1:docker-ce-cli-20.10.7-3.el7.x86_64                                                                                                                 7/9
  Verifying  : docker-ce-rootless-extras-20.10.7-3.el7.x86_64                                                                                                       8/9
  Verifying  : fuse-overlayfs-0.7.2-6.el7_8.x86_64                                                                                                                  9/9

Installed:
  docker-ce.x86_64 3:20.10.7-3.el7

Dependency Installed:
  container-selinux.noarch 2:2.119.2-1.911c772.el7_8             containerd.io.x86_64 0:1.4.8-3.1.el7                docker-ce-cli.x86_64 1:20.10.7-3.el7
  docker-ce-rootless-extras.x86_64 0:20.10.7-3.el7               docker-scan-plugin.x86_64 0:0.8.0-3.el7             fuse-overlayfs.x86_64 0:0.7.2-6.el7_8
  fuse3-libs.x86_64 0:3.6.1-4.el7                                slirp4netns.x86_64 0:0.4.3-4.el7_8

Complete!
[root@sureshmaster ~]# sudo yum install docker-ce
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.mirrors.estointernet.in
 * epel: repos.del.extreme-ix.org
 * extras: centos.mirrors.estointernet.in
 * updates: mirrors.vhost.vn
Package 3:docker-ce-20.10.7-3.el7.x86_64 already installed and latest version
Nothing to do
[root@sureshmaster ~]# sudo systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@sureshmaster ~]# sudo systemctl start docker
[root@sureshmaster ~]# docker -v
Docker version 20.10.7, build f0df350
[root@sureshmaster ~]# docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
  scan: Docker Scan (Docker Inc., v0.8.0)

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 20.10.7
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 7eba5930496d9bbe375fdf71603e610ad737d2b2
 runc version: v1.0.0-0-g84113ee
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-1160.31.1.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 3.701GiB
 Name: sureshmaster
 ID: HT7L:FKPR:7TQB:G4RP:EKFO:EIUG:E4DE:7I4E:X7MB:RKQE:LLVY:WANR
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

[root@sureshmaster ~]# cat <<EOF > /etc/yum.repos.d/kubernetes.repo
> [kubernetes]
> name=Kubernetes
> baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
> enabled=1
> gpgcheck=1
> repo_gpgcheck=1
> gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
> exclude=kube*
> EOF
[root@sureshmaster ~]# setenforce 0
[root@sureshmaster ~]# sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
[root@sureshmaster ~]# yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.mirrors.estointernet.in
 * epel: repos.del.extreme-ix.org
 * extras: centos.mirrors.estointernet.in
 * updates: mirrors.vhost.vn
kubernetes/signature                                                                                                                             |  844 B  00:00:00
Retrieving key from https://packages.cloud.google.com/yum/doc/yum-key.gpg
Importing GPG key 0x307EA071:
 Userid     : "Rapture Automatic Signing Key (cloud-rapture-signing-key-2021-03-01-08_01_09.pub)"
 Fingerprint: 7f92 e05b 3109 3bef 5a3c 2d38 feea 9169 307e a071
 From       : https://packages.cloud.google.com/yum/doc/yum-key.gpg
Retrieving key from https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
kubernetes/signature                                                                                                                             | 1.4 kB  00:00:00 !!!
kubernetes/primary                                                                                                                               |  93 kB  00:00:01
kubernetes                                                                                                                                                      687/687
Resolving Dependencies
--> Running transaction check
---> Package kubeadm.x86_64 0:1.21.3-0 will be installed
--> Processing Dependency: kubernetes-cni >= 0.8.6 for package: kubeadm-1.21.3-0.x86_64
--> Processing Dependency: cri-tools >= 1.13.0 for package: kubeadm-1.21.3-0.x86_64
---> Package kubectl.x86_64 0:1.21.3-0 will be installed
---> Package kubelet.x86_64 0:1.21.3-0 will be installed
--> Processing Dependency: socat for package: kubelet-1.21.3-0.x86_64
--> Processing Dependency: conntrack for package: kubelet-1.21.3-0.x86_64
--> Running transaction check
---> Package conntrack-tools.x86_64 0:1.4.4-7.el7 will be installed
--> Processing Dependency: libnetfilter_cttimeout.so.1(LIBNETFILTER_CTTIMEOUT_1.1)(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cttimeout.so.1(LIBNETFILTER_CTTIMEOUT_1.0)(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cthelper.so.0(LIBNETFILTER_CTHELPER_1.0)(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_queue.so.1()(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cttimeout.so.1()(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cthelper.so.0()(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
---> Package cri-tools.x86_64 0:1.13.0-0 will be installed
---> Package kubernetes-cni.x86_64 0:0.8.7-0 will be installed
---> Package socat.x86_64 0:1.7.3.2-2.el7 will be installed
--> Running transaction check
---> Package libnetfilter_cthelper.x86_64 0:1.0.0-11.el7 will be installed
---> Package libnetfilter_cttimeout.x86_64 0:1.0.0-7.el7 will be installed
---> Package libnetfilter_queue.x86_64 0:1.0.2-2.el7_2 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================================
 Package                                          Arch                             Version                                   Repository                            Size
========================================================================================================================================================================
Installing:
 kubeadm                                          x86_64                           1.21.3-0                                  kubernetes                           9.1 M
 kubectl                                          x86_64                           1.21.3-0                                  kubernetes                           9.5 M
 kubelet                                          x86_64                           1.21.3-0                                  kubernetes                            20 M
Installing for dependencies:
 conntrack-tools                                  x86_64                           1.4.4-7.el7                               base                                 187 k
 cri-tools                                        x86_64                           1.13.0-0                                  kubernetes                           5.1 M
 kubernetes-cni                                   x86_64                           0.8.7-0                                   kubernetes                            19 M
 libnetfilter_cthelper                            x86_64                           1.0.0-11.el7                              base                                  18 k
 libnetfilter_cttimeout                           x86_64                           1.0.0-7.el7                               base                                  18 k
 libnetfilter_queue                               x86_64                           1.0.2-2.el7_2                             base                                  23 k
 socat                                            x86_64                           1.7.3.2-2.el7                             base                                 290 k

Transaction Summary
========================================================================================================================================================================
Install  3 Packages (+7 Dependent packages)

Total download size: 63 M
Installed size: 277 M
Downloading packages:
(1/10): conntrack-tools-1.4.4-7.el7.x86_64.rpm                                                                                                   | 187 kB  00:00:00
warning: /var/cache/yum/x86_64/7/kubernetes/packages/14bfe6e75a9efc8eca3f638eb22c7e2ce759c67f95b43b16fae4ebabde1549f3-cri-tools-1.13.0-0.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 3e1ba8d5: NOKEY
Public key for 14bfe6e75a9efc8eca3f638eb22c7e2ce759c67f95b43b16fae4ebabde1549f3-cri-tools-1.13.0-0.x86_64.rpm is not installed
(2/10): 14bfe6e75a9efc8eca3f638eb22c7e2ce759c67f95b43b16fae4ebabde1549f3-cri-tools-1.13.0-0.x86_64.rpm                                           | 5.1 MB  00:00:02
(3/10): 23f7e018d7380fc0c11f0a12b7fda8ced07b1c04c4ba1c5f5cd24cd4bdfb304d-kubeadm-1.21.3-0.x86_64.rpm                                             | 9.1 MB  00:00:03
(4/10): b04e5387f5522079ac30ee300657212246b14279e2ca4b58415c7bf1f8c8a8f5-kubectl-1.21.3-0.x86_64.rpm                                             | 9.5 MB  00:00:03
(5/10): libnetfilter_cthelper-1.0.0-11.el7.x86_64.rpm                                                                                            |  18 kB  00:00:00
(6/10): libnetfilter_queue-1.0.2-2.el7_2.x86_64.rpm                                                                                              |  23 kB  00:00:00
(7/10): 7e38e980f058e3e43f121c2ba73d60156083d09be0acc2e5581372136ce11a1c-kubelet-1.21.3-0.x86_64.rpm                                             |  20 MB  00:00:04
(8/10): socat-1.7.3.2-2.el7.x86_64.rpm                                                                                                           | 290 kB  00:00:03
(9/10): libnetfilter_cttimeout-1.0.0-7.el7.x86_64.rpm                                                                                            |  18 kB  00:00:03
(10/10): db7cb5cb0b3f6875f54d10f02e625573988e3e91fd4fc5eef0b1876bb18604ad-kubernetes-cni-0.8.7-0.x86_64.rpm                                      |  19 MB  00:00:04
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                   6.5 MB/s |  63 MB  00:00:09
Retrieving key from https://packages.cloud.google.com/yum/doc/yum-key.gpg
Importing GPG key 0x307EA071:
 Userid     : "Rapture Automatic Signing Key (cloud-rapture-signing-key-2021-03-01-08_01_09.pub)"
 Fingerprint: 7f92 e05b 3109 3bef 5a3c 2d38 feea 9169 307e a071
 From       : https://packages.cloud.google.com/yum/doc/yum-key.gpg
Retrieving key from https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
Importing GPG key 0x3E1BA8D5:
 Userid     : "Google Cloud Packages RPM Signing Key <gc-team@google.com>"
 Fingerprint: 3749 e1ba 95a8 6ce0 5454 6ed2 f09c 394c 3e1b a8d5
 From       : https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : libnetfilter_cthelper-1.0.0-11.el7.x86_64                                                                                                           1/10
  Installing : socat-1.7.3.2-2.el7.x86_64                                                                                                                          2/10
  Installing : libnetfilter_cttimeout-1.0.0-7.el7.x86_64                                                                                                           3/10
  Installing : cri-tools-1.13.0-0.x86_64                                                                                                                           4/10
  Installing : libnetfilter_queue-1.0.2-2.el7_2.x86_64                                                                                                             5/10
  Installing : conntrack-tools-1.4.4-7.el7.x86_64                                                                                                                  6/10
  Installing : kubernetes-cni-0.8.7-0.x86_64                                                                                                                       7/10
  Installing : kubelet-1.21.3-0.x86_64                                                                                                                             8/10
  Installing : kubectl-1.21.3-0.x86_64                                                                                                                             9/10
  Installing : kubeadm-1.21.3-0.x86_64                                                                                                                            10/10
  Verifying  : kubectl-1.21.3-0.x86_64                                                                                                                             1/10
  Verifying  : conntrack-tools-1.4.4-7.el7.x86_64                                                                                                                  2/10
  Verifying  : kubernetes-cni-0.8.7-0.x86_64                                                                                                                       3/10
  Verifying  : libnetfilter_queue-1.0.2-2.el7_2.x86_64                                                                                                             4/10
  Verifying  : cri-tools-1.13.0-0.x86_64                                                                                                                           5/10
  Verifying  : kubeadm-1.21.3-0.x86_64                                                                                                                             6/10
  Verifying  : kubelet-1.21.3-0.x86_64                                                                                                                             7/10
  Verifying  : libnetfilter_cttimeout-1.0.0-7.el7.x86_64                                                                                                           8/10
  Verifying  : socat-1.7.3.2-2.el7.x86_64                                                                                                                          9/10
  Verifying  : libnetfilter_cthelper-1.0.0-11.el7.x86_64                                                                                                          10/10

Installed:
  kubeadm.x86_64 0:1.21.3-0                              kubectl.x86_64 0:1.21.3-0                              kubelet.x86_64 0:1.21.3-0

Dependency Installed:
  conntrack-tools.x86_64 0:1.4.4-7.el7         cri-tools.x86_64 0:1.13.0-0                kubernetes-cni.x86_64 0:0.8.7-0  libnetfilter_cthelper.x86_64 0:1.0.0-11.el7
  libnetfilter_cttimeout.x86_64 0:1.0.0-7.el7  libnetfilter_queue.x86_64 0:1.0.2-2.el7_2  socat.x86_64 0:1.7.3.2-2.el7

Complete!
[root@sureshmaster ~]# systemctl enable --now kubelet
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@sureshmaster ~]# kubeadm init --ignore-preflight-errors all
[init] Using Kubernetes version: v1.21.3
[preflight] Running pre-flight checks
        [WARNING NumCPU]: the number of available CPUs 1 is less than the required 2
        [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
        [WARNING Hostname]: hostname "sureshmaster" could not be reached
        [WARNING Hostname]: hostname "sureshmaster": lookup sureshmaster on 8.8.8.8:53: no such host
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local sureshmaster] and IPs [10.96.0.1 192.168.2.14]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [localhost sureshmaster] and IPs [192.168.2.14 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [localhost sureshmaster] and IPs [192.168.2.14 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 26.013736 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.21" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node sureshmaster as control-plane by adding the labels: [node-role.kubernetes.io/master(deprecated) node-role.kubernetes.io/control-plane node.kubernetes.io/exclude-from-external-load-balancers]
[mark-control-plane] Marking the node sureshmaster as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: zzn8hn.48r1n0ol0guws3n2
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to get nodes
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy

Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

Alternatively, if you are the root user, you can run:

  export KUBECONFIG=/etc/kubernetes/admin.conf

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

Then you can join any number of worker nodes by running the following on each as root:

kubeadm join 192.168.2.14:6443 --token zzn8hn.48r1n0ol0guws3n2 --discovery-token-ca-cert-hash sha256:1dfc2ff47b54bb831c2f27dbbb21b35787d946c4b7e66037873b81cc7c338dc0
[root@sureshmaster ~]# mkdir -p $HOME/.kube
[root@sureshmaster ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@sureshmaster ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
[root@sureshmaster ~]# kubectl get nodes
NAME           STATUS     ROLES                  AGE   VERSION
sureshmaster   NotReady   control-plane,master   88s   v1.21.3
[root@sureshmaster ~]# kubectl get pods --all-namespaces
NAMESPACE     NAME                                   READY   STATUS    RESTARTS   AGE
kube-system   coredns-558bd4d5db-48jwt               0/1     Pending   0          100s
kube-system   coredns-558bd4d5db-ntpbc               0/1     Pending   0          100s
kube-system   etcd-sureshmaster                      1/1     Running   0          93s
kube-system   kube-apiserver-sureshmaster            1/1     Running   0          93s
kube-system   kube-controller-manager-sureshmaster   1/1     Running   0          93s
kube-system   kube-proxy-9vtq5                       1/1     Running   0          100s
kube-system   kube-scheduler-sureshmaster            1/1     Running   0          93s
[root@sureshmaster ~]# kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
serviceaccount/weave-net created
clusterrole.rbac.authorization.k8s.io/weave-net created
clusterrolebinding.rbac.authorization.k8s.io/weave-net created
role.rbac.authorization.k8s.io/weave-net created
rolebinding.rbac.authorization.k8s.io/weave-net created
daemonset.apps/weave-net created
[root@sureshmaster ~]# kubectl get nodes
NAME           STATUS     ROLES                  AGE     VERSION
sureshmaster   NotReady   control-plane,master   2m53s   v1.21.3
[root@sureshmaster ~]# kubectl get nodes
NAME           STATUS   ROLES                  AGE    VERSION
sureshmaster   Ready    control-plane,master   3m7s   v1.21.3
[root@sureshmaster ~]# kubectl get nodes
NAME           STATUS   ROLES                  AGE     VERSION
sureshmaster   Ready    control-plane,master   3m24s   v1.21.3
[root@sureshmaster ~]# kubectl get pods --all-namespaces
NAMESPACE     NAME                                   READY   STATUS    RESTARTS   AGE
kube-system   coredns-558bd4d5db-48jwt               1/1     Running   0          3m54s
kube-system   coredns-558bd4d5db-ntpbc               1/1     Running   0          3m54s
kube-system   etcd-sureshmaster                      1/1     Running   0          3m47s
kube-system   kube-apiserver-sureshmaster            1/1     Running   0          3m47s
kube-system   kube-controller-manager-sureshmaster   1/1     Running   0          3m47s
kube-system   kube-proxy-9vtq5                       1/1     Running   0          3m54s
kube-system   kube-scheduler-sureshmaster            1/1     Running   0          3m47s
kube-system   weave-net-9h6nd                        2/2     Running   1          78s
[root@sureshmaster ~]# kubectl get nodes
NAME           STATUS   ROLES                  AGE    VERSION
sureshmaster   Ready    control-plane,master   4m1s   v1.21.3
[root@sureshmaster ~]#

WorkerNode

login as: root
root@192.168.2.13's password:
Last login: Fri Jul 23 02:45:58 2021
[root@sureshworker ~]# root
bash: root: command not found...
[root@sureshworker ~]# sudo -s
[root@sureshworker ~]# sudo yum install -y yum-utils device-mapper-persistent-data lvm2
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                                                                                                             | 8.2 kB  00:00:00
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
base                                                                                                                                             | 3.6 kB  00:00:00
docker-ce-stable                                                                                                                                 | 3.5 kB  00:00:00
epel                                                                                                                                             | 4.7 kB  00:00:00
extras                                                                                                                                           | 2.9 kB  00:00:00
updates                                                                                                                                          | 2.9 kB  00:00:00
Package yum-utils-1.1.31-54.el7_8.noarch already installed and latest version
Package device-mapper-persistent-data-0.8.5-3.el7_9.2.x86_64 already installed and latest version
Package 7:lvm2-2.02.187-6.el7_9.5.x86_64 already installed and latest version
Nothing to do
[root@sureshworker ~]# sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror, langpacks
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@sureshworker ~]# sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Loaded plugins: fastestmirror, langpacks
Existing lock /var/run/yum.pid: another copy is running as pid 9916.
Another app is currently holding the yum lock; waiting for it to exit...
  The other application is: PackageKit
    Memory : 256 M RSS (1.1 GB VSZ)
    Started: Fri Jul 23 02:47:53 2021 - 00:11 ago
    State  : Sleeping, pid: 9916
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
epel-release-latest-7.noarch.rpm                                                                                                                 |  15 kB  00:00:00
Examining /var/tmp/yum-root-hE30PM/epel-release-latest-7.noarch.rpm: epel-release-7-13.noarch
/var/tmp/yum-root-hE30PM/epel-release-latest-7.noarch.rpm: does not update installed package.
Error: Nothing to do
[root@sureshworker ~]# sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
Loaded plugins: fastestmirror, langpacks
[root@sureshworker ~]# sudo yum install -y docker-ce
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
Package 3:docker-ce-20.10.7-3.el7.x86_64 already installed and latest version
Nothing to do
[root@sureshworker ~]# sudo yum install docker-ce
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
Package 3:docker-ce-20.10.7-3.el7.x86_64 already installed and latest version
Nothing to do
[root@sureshworker ~]# sudo systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@sureshworker ~]# sudo systemctl start docker
[root@sureshworker ~]# docker -v
Docker version 20.10.7, build f0df350
[root@sureshworker ~]# docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
  scan: Docker Scan (Docker Inc., v0.8.0)

Server:
 Containers: 15
  Running: 7
  Paused: 0
  Stopped: 8
 Images: 34
 Server Version: 20.10.7
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 7eba5930496d9bbe375fdf71603e610ad737d2b2
 runc version: v1.0.0-0-g84113ee
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-1160.31.1.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 3.701GiB
 Name: sureshworker
 ID: 47IO:O3AU:KNR2:N2VU:INJB:2TFP:XEWV:4TF3:LX7F:IW5N:IA4P:6XME
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Username: sureshramisetti
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

[root@sureshworker ~]# cat < /etc/yum.repos.d/kubernetes.repo
> [kubernetes]
> name=Kubernetes
> baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
> enabled=1
> gpgcheck=1
> repo_gpgcheck=1
> gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
> exclude=kube*
> EOF
[root@sureshworker ~]# setenforce 0
[root@sureshworker ~]# sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
[root@sureshworker ~]# yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
kubernetes/signature                                                                                                                             |  844 B  00:00:00
Retrieving key from https://packages.cloud.google.com/yum/doc/yum-key.gpg
Importing GPG key 0x307EA071:
 Userid     : "Rapture Automatic Signing Key (cloud-rapture-signing-key-2021-03-01-08_01_09.pub)"
 Fingerprint: 7f92 e05b 3109 3bef 5a3c 2d38 feea 9169 307e a071
 From       : https://packages.cloud.google.com/yum/doc/yum-key.gpg
Retrieving key from https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
kubernetes/signature                                                                                                                             | 1.4 kB  00:00:00 !!!
kubernetes/primary                                                                                                                               |  93 kB  00:00:00
kubernetes                                                                                                                                                      687/687
Resolving Dependencies
--> Running transaction check
---> Package kubeadm.x86_64 0:1.21.3-0 will be installed
--> Processing Dependency: kubernetes-cni >= 0.8.6 for package: kubeadm-1.21.3-0.x86_64
--> Processing Dependency: cri-tools >= 1.13.0 for package: kubeadm-1.21.3-0.x86_64
---> Package kubectl.x86_64 0:1.21.3-0 will be installed
---> Package kubelet.x86_64 0:1.21.3-0 will be installed
--> Processing Dependency: socat for package: kubelet-1.21.3-0.x86_64
--> Processing Dependency: conntrack for package: kubelet-1.21.3-0.x86_64
--> Running transaction check
---> Package conntrack-tools.x86_64 0:1.4.4-7.el7 will be installed
--> Processing Dependency: libnetfilter_cttimeout.so.1(LIBNETFILTER_CTTIMEOUT_1.1)(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cttimeout.so.1(LIBNETFILTER_CTTIMEOUT_1.0)(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cthelper.so.0(LIBNETFILTER_CTHELPER_1.0)(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_queue.so.1()(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cttimeout.so.1()(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
--> Processing Dependency: libnetfilter_cthelper.so.0()(64bit) for package: conntrack-tools-1.4.4-7.el7.x86_64
---> Package cri-tools.x86_64 0:1.13.0-0 will be installed
---> Package kubernetes-cni.x86_64 0:0.8.7-0 will be installed
---> Package socat.x86_64 0:1.7.3.2-2.el7 will be installed
--> Running transaction check
---> Package libnetfilter_cthelper.x86_64 0:1.0.0-11.el7 will be installed
---> Package libnetfilter_cttimeout.x86_64 0:1.0.0-7.el7 will be installed
---> Package libnetfilter_queue.x86_64 0:1.0.2-2.el7_2 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================================
 Package                                          Arch                             Version                                   Repository                            Size
========================================================================================================================================================================
Installing:
 kubeadm                                          x86_64                           1.21.3-0                                  kubernetes                           9.1 M
 kubectl                                          x86_64                           1.21.3-0                                  kubernetes                           9.5 M
 kubelet                                          x86_64                           1.21.3-0                                  kubernetes                            20 M
Installing for dependencies:
 conntrack-tools                                  x86_64                           1.4.4-7.el7                               base                                 187 k
 cri-tools                                        x86_64                           1.13.0-0                                  kubernetes                           5.1 M
 kubernetes-cni                                   x86_64                           0.8.7-0                                   kubernetes                            19 M
 libnetfilter_cthelper                            x86_64                           1.0.0-11.el7                              base                                  18 k
 libnetfilter_cttimeout                           x86_64                           1.0.0-7.el7                               base                                  18 k
 libnetfilter_queue                               x86_64                           1.0.2-2.el7_2                             base                                  23 k
 socat                                            x86_64                           1.7.3.2-2.el7                             base                                 290 k

Transaction Summary
========================================================================================================================================================================
Install  3 Packages (+7 Dependent packages)

Total download size: 63 M
Installed size: 277 M
Downloading packages:
(1/10): conntrack-tools-1.4.4-7.el7.x86_64.rpm                                                                                                   | 187 kB  00:00:00
warning: /var/cache/yum/x86_64/7/kubernetes/packages/23f7e018d7380fc0c11f0a12b7fda8ced07b1c04c4ba1c5f5cd24cd4bdfb304d-kubeadm-1.21.3-0.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 3e1ba8d5: NOKEY
Public key for 23f7e018d7380fc0c11f0a12b7fda8ced07b1c04c4ba1c5f5cd24cd4bdfb304d-kubeadm-1.21.3-0.x86_64.rpm is not installed
(2/10): 23f7e018d7380fc0c11f0a12b7fda8ced07b1c04c4ba1c5f5cd24cd4bdfb304d-kubeadm-1.21.3-0.x86_64.rpm                                             | 9.1 MB  00:00:01
(3/10): b04e5387f5522079ac30ee300657212246b14279e2ca4b58415c7bf1f8c8a8f5-kubectl-1.21.3-0.x86_64.rpm                                             | 9.5 MB  00:00:01
(4/10): 7e38e980f058e3e43f121c2ba73d60156083d09be0acc2e5581372136ce11a1c-kubelet-1.21.3-0.x86_64.rpm                                             |  20 MB  00:00:02
(5/10): libnetfilter_cthelper-1.0.0-11.el7.x86_64.rpm                                                                                            |  18 kB  00:00:00
(6/10): libnetfilter_queue-1.0.2-2.el7_2.x86_64.rpm                                                                                              |  23 kB  00:00:00
(7/10): libnetfilter_cttimeout-1.0.0-7.el7.x86_64.rpm                                                                                            |  18 kB  00:00:00
(8/10): socat-1.7.3.2-2.el7.x86_64.rpm                                                                                                           | 290 kB  00:00:00
(9/10): db7cb5cb0b3f6875f54d10f02e625573988e3e91fd4fc5eef0b1876bb18604ad-kubernetes-cni-0.8.7-0.x86_64.rpm                                       |  19 MB  00:00:03
(10/10): 14bfe6e75a9efc8eca3f638eb22c7e2ce759c67f95b43b16fae4ebabde1549f3-cri-tools-1.13.0-0.x86_64.rpm                                          | 5.1 MB  00:00:12
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                   5.1 MB/s |  63 MB  00:00:12
Retrieving key from https://packages.cloud.google.com/yum/doc/yum-key.gpg
Importing GPG key 0x307EA071:
 Userid     : "Rapture Automatic Signing Key (cloud-rapture-signing-key-2021-03-01-08_01_09.pub)"
 Fingerprint: 7f92 e05b 3109 3bef 5a3c 2d38 feea 9169 307e a071
 From       : https://packages.cloud.google.com/yum/doc/yum-key.gpg
Retrieving key from https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
Importing GPG key 0x3E1BA8D5:
 Userid     : "Google Cloud Packages RPM Signing Key "
 Fingerprint: 3749 e1ba 95a8 6ce0 5454 6ed2 f09c 394c 3e1b a8d5
 From       : https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : libnetfilter_cthelper-1.0.0-11.el7.x86_64                                                                                                           1/10
  Installing : socat-1.7.3.2-2.el7.x86_64                                                                                                                          2/10
  Installing : libnetfilter_cttimeout-1.0.0-7.el7.x86_64                                                                                                           3/10
  Installing : cri-tools-1.13.0-0.x86_64                                                                                                                           4/10
  Installing : libnetfilter_queue-1.0.2-2.el7_2.x86_64                                                                                                             5/10
  Installing : conntrack-tools-1.4.4-7.el7.x86_64                                                                                                                  6/10
  Installing : kubernetes-cni-0.8.7-0.x86_64                                                                                                                       7/10
  Installing : kubelet-1.21.3-0.x86_64                                                                                                                             8/10
  Installing : kubectl-1.21.3-0.x86_64                                                                                                                             9/10
  Installing : kubeadm-1.21.3-0.x86_64                                                                                                                            10/10
  Verifying  : kubectl-1.21.3-0.x86_64                                                                                                                             1/10
  Verifying  : conntrack-tools-1.4.4-7.el7.x86_64                                                                                                                  2/10
  Verifying  : kubernetes-cni-0.8.7-0.x86_64                                                                                                                       3/10
  Verifying  : libnetfilter_queue-1.0.2-2.el7_2.x86_64                                                                                                             4/10
  Verifying  : cri-tools-1.13.0-0.x86_64                                                                                                                           5/10
  Verifying  : kubeadm-1.21.3-0.x86_64                                                                                                                             6/10
  Verifying  : kubelet-1.21.3-0.x86_64                                                                                                                             7/10
  Verifying  : libnetfilter_cttimeout-1.0.0-7.el7.x86_64                                                                                                           8/10
  Verifying  : socat-1.7.3.2-2.el7.x86_64                                                                                                                          9/10
  Verifying  : libnetfilter_cthelper-1.0.0-11.el7.x86_64                                                                                                          10/10

Installed:
  kubeadm.x86_64 0:1.21.3-0                              kubectl.x86_64 0:1.21.3-0                              kubelet.x86_64 0:1.21.3-0

Dependency Installed:
  conntrack-tools.x86_64 0:1.4.4-7.el7         cri-tools.x86_64 0:1.13.0-0                kubernetes-cni.x86_64 0:0.8.7-0  libnetfilter_cthelper.x86_64 0:1.0.0-11.el7
  libnetfilter_cttimeout.x86_64 0:1.0.0-7.el7  libnetfilter_queue.x86_64 0:1.0.2-2.el7_2  socat.x86_64 0:1.7.3.2-2.el7

Complete!
[root@sureshworker ~]# systemctl enable --now kubelet
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@sureshworker ~]# kubeadm join 192.168.2.14:6443 --token zzn8hn.48r1n0ol0guws3n2 --discovery-token-ca-cert-hash sha256:1dfc2ff47b54bb831c2f27dbbb21b35787d946c4b7e66037873b81cc7c338dc0
[preflight] Running pre-flight checks
        [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
        [WARNING Hostname]: hostname "sureshworker" could not be reached
        [WARNING Hostname]: hostname "sureshworker": lookup sureshworker on 8.8.8.8:53: no such host
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...

This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.

Run 'kubectl get nodes' on the control-plane to see this node join the cluster.

[root@sureshworker ~]#
[root@sureshworker ~]# kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?
[root@sureshworker ~]# kubectl get pods --all-namespaces
The connection to the server localhost:8080 was refused - did you specify the right host or port?
[root@sureshworker ~]#

Kubernetes Lab-Suresh

SureshRamisetti — Thu, 22 Jul 2021 07:06:27 +0000

What are the 10 feature of Kubernetes?

Kubernetes can schedule and run application containers on clusters of physical or virtual machines. Kubernetes provides the infrastructure to build a truly container-centric development environment.

Kubernetes can speed up the development process by making easy, automated deployments, updates (rolling-update) and by managing our apps and services with almost zero downtime. It also provides self-healing. Kubernetes can detect and restart services when a process crashes inside the container. Kubernetes is originally developed by Google, it is open-sourced since its launch and managed by a large community of contributors.

Kubernetes satisfies number of common needs of application running in production , such as :

Co-locating helper process , facilitating composite application and preserving the one application per container model
Mounting storage systems
Distributing secrets
Checking application health
Replicating application health
Using Horizontal Pod Autoscaling
Balancing loads
Monitoring resource
Debugging application
Providing authentication and authorization.

How kubernetes works?

Kubernetes the most prominent technology in modern microservices. It is designed to make managing microservices clusters of containerized applications simpler and more automated. Beneath this simple notion is a world of complexity.

One helpful way to think about Kubernetes is as a distributed operating system for containers. It provides the tools and commands necessary for orchestrating the interaction and scaling of containers (most commonly Docker Containers) and the infrastructure containers run on. A general tool designed to work for a wide range of scenarios, Kubernetes is a very flexible system—and very complex.

Kubernetes Works Like an Operating System:

Kubernetes is an example of a well-architected distributed system. It treats all the machines in a cluster as a single pool of resources. It takes up the role of a distributed operating system by effectively managing the scheduling, allocating the resources, monitoring the health of the infrastructure, and even maintaining the desired state of infrastructure and workloads. Kubernetes is an operating system capable of running modern applications across multiple clusters and infrastructures on cloud services and private data center environments.

Like any other mature distributed system, Kubernetes has two layers consisting of the head nodes and worker nodes. The head nodes typically run the control plane responsible for scheduling and managing the life cycle of workloads. The worker nodes act as the workhorses that run applications. The collection of head nodes and worker nodes becomes a cluster.

What are the components of Master? explain in one line sentense?

Master Server Components

API Server

The API server exposes a REST interface to the Kubernetes cluster. All operations against pods, services, and so forth, are executed programmatically by communicating with the endpoints provided by it.

Scheduler

The scheduler is responsible for assigning work to the various nodes. It keeps watch over the resource capacity and ensures that a worker node’s performance is within an appropriate threshold.

Controller-Manager

The controller-manager is responsible for making sure that the shared state of the cluster is operating as expected. More accurately, the controller manager oversees various controllers which respond to events (e.g., if a node goes down).

etcd

etcd is a distributed key-value store that Kubernetes uses to share information about the overall state of a cluster. Additionally, nodes can refer to the global configuration data stored there to set themselves up whenever they are regenerated.

What are the components of Worker? explain in one line sentense?

Worker Node Components

Kubelet

A Kubelet tracks the state of a pod to ensure that all the containers are running. It provides a heartbeat message every few seconds to the master server. If a replication controller does not receive that message, the node is marked as unhealthy.

Kube Proxy

The Kube proxy routes traffic coming into a node from the service. It forwards requests for work to the correct containers.

etcd

What are the components of Workstation? explain in one line sentence?

A Kubernetes cluster consists of a set of worker machines, called nodes that run containerized applications. Every cluster has at least one worker node.

The worker node(s) host the Pods that are the components of the application workload. The Control plane manages the worker nodes and the Pods in the cluster. In production environments, the control plane usually runs across multiple computers and a cluster usually runs multiple nodes, providing fault-tolerance and high availability.

There are two aspects to Kubernetes: the worker nodes and the control plane. The worker nodes are where the actual containerized applications exist along with the necessary Kubernetes tooling. The control plane is where the tools for managing this cluster lives.

What is POD?

Pods are the smallest execution unit in a Kubernetes cluster. In Kubernetes, containers do not run directly on cluster nodes; instead one or more containers are encased in a pod. All applications in a pod share the same resources and local network, easing communications between applications in a pod. Pods utilize an agent on each node called a kubelet to communicate with the Kubernetes API and the rest of the cluster. Although developers need API access, management of pods is transitioning to the domain of DevOps.

As the load on a pod increases, Kubernetes can automatically replicate the pod to achieve desired scalability. Thus it is important to design a pod to be lean as possible. Pods should contain a single main process along with any help or ‘side-car’ containers necessary for their execution.

What is the difference between containers vs. pods?

Containers encompass the code required to execute a specific process or function. Before Kubernetes, organizations would run containers directly on a physical or virtual server, but without the scalability and flexibility offered by a kubernetes cluster.

Pods offer another level of abstraction for containers. One or more application can be wrapped into a pod (think peas in a pod), and the pod is the smallest unit of execution in a Kubernetes cluster. For example, pods can contain initialization containers that prepare the environment for the containerized application code and then terminate before the application container begins execution. Pods are the smallest unit of replication in a cluster, so all containers in a pod will scale up or down together.

Pods include persistent storage volumes as well as containers, if access to persistent storage is necessary for the application.

A Pod can host multiple containers and storage volumes.
Pods are instances of Deployments
One Deployment can have multiple pods.
With Horizontal Pod Autoscaling, Pods of a Deployment can be automatically started and halted based on CPU usage.
Containers within the same pod have access to shared volumes.
Each Pod has its unique IP Address within the cluster.
Pods are up and running until someone (or a controller) destroys them.
Any data saved inside the Pod will disappear without a persistent storage.

Suresh R-Docker – Lab – Assignment – Excercise

SureshRamisetti — Wed, 21 Jul 2021 04:32:26 +0000

Step 1 – Register a site to POST Assigment and Share with Trainer and For Self Notes – Completed ( User : SureshRamisetti)

Step 2 – Pre Test using LMS ( Completed)

Here is the Results which I have shared to Shiva : shiva@palmeto.co.in

https://www.devopsschool.com/lms/mod/quiz/review.php?attempt=3056&cmid=250

Step 3 – Install Docker Engine in Centos#1 Vm.

[root@localhost ~]# history
1 ifconfig
2 history
3 sudo yum install -y yum-utils device-mapper-persistent-data lvm2
4 sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
5 sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
6 sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
7 sudo yum install -y docker-ce
8 sudo yum install docker-ce
9 docker -v
10 sudo systemctl enable docker
11 sudo systemctl start docker
12 docker info
13 dcoker info
14 docker info
15 sudo docker run hello-world
16 docker ps -a
17 history

[root@localhost ~]# sudo docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS     NAMES
e3cb8e2fbf42   hello-world   "/hello"             13 seconds ago      Exited (0) 11 seconds ago             crazy_wu
75cafc0d6fee   ubuntu        "bash"               About an hour ago   Exited (0) 7 minutes ago              dreamy_northcutt
a3c9542f3076   ubuntu        "bash"               About an hour ago   Exited (0) 7 minutes ago              intelligent_goodall
0584214f703b   ubuntu        "bash"               15 hours ago        Exited (0) 7 minutes ago              compassionate_varahamihira
d83c0d7cfc94   httpd         "httpd-foreground"   15 hours ago        Exited (0) 7 minutes ago              determined_goodall
d8cca0a8d62c   ubuntu        "bash"               15 hours ago        Exited (0) 15 hours ago               charming_liskov

  26  docker update 75cafc0d6fee d83c0d7cfc94
   27  yum install git -y
   28  git --version
   29  yum install gi
   30  docker info
   31  docker -v
   32  which dcoker
   33  which docker
   34  which dockerd
   35  ps -eaf | grep dockerd
   36  which containerd
   37  docker -eaf | grep containerd
   38  ps -eaf | grep containerd
   39  history
   40  docker ps -a
   41  docker pull ubuntu
   42  docker ps -a
   43  docker rm a3c9542f3076
   44  docker ps -a
   45  docker rm d8cca0a8d62c
   46  docker rm d0584214f703b
   47  docker ps -a
   48  docker start 0584214f703b
   49  docker ps -a
   50  docker rm 0584214f703b
   51* docker
   52  docker rm 0584214f703b
   53  docker ps -a
   54  docker restart e3cb8e2fbf42
   55  docker ps -a
   56  docker stop e3cb8e2fbf42
   57  docker rm e3cb8e2fbf42
   58  docker ps -a
   59  docker start d4a3a68b47a9
   60  docker ps -a
   61  history
   62  docker pause d4a3a68b47a9
   63  docker start d4a3a68b47a9
   64  history

docker exec -it <container name> /bin/bash

Step 4 – Assignment#1

Create a Ubuntu container
Install Update, git & apache2
run a git command in container from outside

[root@localhost ~]# history
    1  ifconfig
    2  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    3  docker ps -a
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  docker ps -a
    9  docker start 75cafc0d6fee
   10  docker ps -a
   11  docker kill 82da9c001d75
   12  docker start 82da9c001d75
   13  docker kill 82da9c001d75
   14  docker rm 82da9c001d75
   15  docker ps -a
   16  docker start 79e0ca51ae30
   17  docker rm 79e0ca51ae30
   18  docker ps -a
   19  docker pull https
   20  docker pull httpd
   21  docker ps -a
   22  docker run -d httpd
   23  docker ps -a
   24  docker exec -it 75cafc0d6fee /bin/bash
   25  docker ps -a
   26  docker run -d -p 80:80 httpd
   27  docker ps -a
   28  docker attach 75cafc0d6fee
   29  ls
   30  history

Step 5 – Assignment#2

Create a httpd container exposed at 8080 port
Access(curl) container from node

22  docker run -d httpd
   23  docker ps -a
   24  docker exec -it 75cafc0d6fee /bin/bash
   25  docker ps -a
   26  docker run -d -p 80:80 httpd
   27  docker ps -a
   28  docker attach 75cafc0d6fee
   29  ls
   30  history
   31  docker ps -a
   32   docker run -d -p 80:80 httpd
   33  docker run -d -p 81:80 httpddocker run -d -p 81:80 httpd
   34  docker run -d -p 82:80 httpd
   35  docker run -d -p 81:80
   36  docker run -d -p 81:80 https
   37  docker run -d -p 81:80 httpd
   38  docker ps -a
   39  history
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS                               NAMES
7bf8088b0a5f   httpd         "httpd-foreground"   4 minutes ago       Up 4 minutes                0.0.0.0:81->80/tcp, :::81->80/tcp   suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   5 minutes ago       Up 5 minutes                0.0.0.0:82->80/tcp, :::82->80/tcp   youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   6 minutes ago       Created                                                         suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   13 minutes ago      Up 13 minutes               0.0.0.0:80->80/tcp, :::80->80/tcp   sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   16 minutes ago      Up 16 minutes               80/tcp                              distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 37 minutes ago                                       hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago         Up 18 minutes                                                   dreamy_northcutt
[root@localhost ~]#

 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 3.701GiB
 Name: localhost.localdomain
 ID: 47IO:O3AU:KNR2:N2VU:INJB:2TFP:XEWV:4TF3:LX7F:IW5N:IA4P:6XME
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

[root@localhost ~]# docker -v
Docker version 20.10.7, build f0df350
[root@localhost ~]# which dcoker
/usr/bin/which: no dcoker in (/sbin:/bin:/usr/sbin:/usr/bin)
[root@localhost ~]# which docker
/bin/docker
[root@localhost ~]# which dockerd
/bin/dockerd
[root@localhost ~]# ps -eaf | grep dockerd
root       309 31453  0 01:13 pts/0    00:00:00 grep --color=auto dockerd
root     31757     1  0 00:46 ?        00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
[root@localhost ~]# which containerd
/bin/containerd
[root@localhost ~]# docker -eaf | grep containerd
unknown shorthand flag: 'e' in -eaf
See 'docker --help'.

Usage:  docker [OPTIONS] COMMAND

A self-sufficient runtime for containers

Options:
      --config string      Location of client config files (default "/root/.docker")
  -c, --context string     Name of the context to use to connect to the daemon (overrides DOCKER_HOST env var and default context set with "docker context use")
  -D, --debug              Enable debug mode
  -H, --host list          Daemon socket(s) to connect to
  -l, --log-level string   Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info")
      --tls                Use TLS; implied by --tlsverify
      --tlscacert string   Trust certs signed only by this CA (default "/root/.docker/ca.pem")
      --tlscert string     Path to TLS certificate file (default "/root/.docker/cert.pem")
      --tlskey string      Path to TLS key file (default "/root/.docker/key.pem")
      --tlsverify          Use TLS and verify the remote
  -v, --version            Print version information and quit

Management Commands:
  app*        Docker App (Docker Inc., v0.9.1-beta3)
  builder     Manage builds
  buildx*     Build with BuildKit (Docker Inc., v0.5.1-docker)
  config      Manage Docker configs
  container   Manage containers
  context     Manage contexts
  image       Manage images
  manifest    Manage Docker image manifests and manifest lists
  network     Manage networks
  node        Manage Swarm nodes
  plugin      Manage plugins
  scan*       Docker Scan (Docker Inc., v0.8.0)
  secret      Manage Docker secrets
  service     Manage services
  stack       Manage Docker stacks
  swarm       Manage Swarm
  system      Manage Docker
  trust       Manage trust on Docker images
  volume      Manage volumes

Commands:
  attach      Attach local standard input, output, and error streams to a running container
  build       Build an image from a Dockerfile
  commit      Create a new image from a container's changes
  cp          Copy files/folders between a container and the local filesystem
  create      Create a new container
  diff        Inspect changes to files or directories on a container's filesystem
  events      Get real time events from the server
  exec        Run a command in a running container
  export      Export a container's filesystem as a tar archive
  history     Show the history of an image
  images      List images
  import      Import the contents from a tarball to create a filesystem image
  info        Display system-wide information
  inspect     Return low-level information on Docker objects
  kill        Kill one or more running containers
  load        Load an image from a tar archive or STDIN
  login       Log in to a Docker registry
  logout      Log out from a Docker registry
  logs        Fetch the logs of a container
  pause       Pause all processes within one or more containers
  port        List port mappings or a specific mapping for the container
  ps          List containers
  pull        Pull an image or a repository from a registry
  push        Push an image or a repository to a registry
  rename      Rename a container
  restart     Restart one or more containers
  rm          Remove one or more containers
  rmi         Remove one or more images
  run         Run a command in a new container
  save        Save one or more images to a tar archive (streamed to STDOUT by default)
  search      Search the Docker Hub for images
  start       Start one or more stopped containers
  stats       Display a live stream of container(s) resource usage statistics
  stop        Stop one or more running containers
  tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
  top         Display the running processes of a container
  unpause     Unpause all processes within one or more containers
  update      Update configuration of one or more containers
  version     Show the Docker version information
  wait        Block until one or more containers stop, then print their exit codes

Run 'docker COMMAND --help' for more information on a command.

To get more help with docker, check out our guides at https://docs.docker.com/go/guides/

[root@localhost ~]# ps -eaf | grep containerd
root       362 31453  0 01:16 pts/0    00:00:00 grep --color=auto containerd
root     31749     1  0 00:46 ?        00:00:01 /usr/bin/containerd
root     31757     1  0 00:46 ?        00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
root     32277     1  0 00:57 ?        00:00:00 /usr/bin/containerd-shim-runc-v2 -namespace moby -id 75cafc0d6feed6e3bb58e5440848615c1d632b0608787f773cfdf7324289f9f0 -address /run/containerd/containerd.sock
root     32344     1  0 00:57 ?        00:00:00 /usr/bin/containerd-shim-runc-v2 -namespace moby -id d83c0d7cfc94716a492d2d626448dde013f1638dab0edf12d5290749467f9ae0 -address /run/containerd/containerd.sock
[root@localhost ~]# history
    1  ifconfig
    2  history
    3  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  sudo yum install docker-ce
    9  docker -v
   10  sudo systemctl enable docker
   11  sudo systemctl start docker
   12  docker info
   13*
   14  docker info
   15  sudo docker run hello-world
   16  docker ps -a
   17  history
   18  sudo docker run hello-world
   19  docker ps
   20  docker ps -a
   21  docker start 75cafc0d6fee
   22  docker start d83c0d7cfc94
   23  docker ps -a
   24  docker --help
   25  docker update 75cafc0d6fee
   26  docker update 75cafc0d6fee d83c0d7cfc94
   27  yum install git -y
   28  git --version
   29  yum install gi
   30  docker info
   31  docker -v
   32  which dcoker
   33  which docker
   34  which dockerd
   35  ps -eaf | grep dockerd
   36  which containerd
   37  docker -eaf | grep containerd
   38  ps -eaf | grep containerd
   39  history
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             29 minutes ago   Exited (0) 28 minutes ago             hungry_satoshi
e3cb8e2fbf42   hello-world   "/hello"             31 minutes ago   Exited (0) 31 minutes ago             crazy_wu
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 22 minutes                         dreamy_northcutt
a3c9542f3076   ubuntu        "bash"               2 hours ago      Exited (0) 38 minutes ago             intelligent_goodall
0584214f703b   ubuntu        "bash"               16 hours ago     Exited (0) 38 minutes ago             compassionate_varahamihira
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 22 minutes               80/tcp    determined_goodall
d8cca0a8d62c   ubuntu        "bash"               16 hours ago     Exited (0) 16 hours ago               charming_liskov
[root@localhost ~]# docker pull ubuntu
Using default tag: latest
latest: Pulling from library/ubuntu
Digest: sha256:b3e2e47d016c08b3396b5ebe06ab0b711c34e7f37b98c9d37abe794b71cea0a2
Status: Image is up to date for ubuntu:latest
docker.io/library/ubuntu:latest
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             29 minutes ago   Exited (0) 29 minutes ago             hungry_satoshi
e3cb8e2fbf42   hello-world   "/hello"             31 minutes ago   Exited (0) 31 minutes ago             crazy_wu
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 23 minutes                         dreamy_northcutt
a3c9542f3076   ubuntu        "bash"               2 hours ago      Exited (0) 39 minutes ago             intelligent_goodall
0584214f703b   ubuntu        "bash"               16 hours ago     Exited (0) 39 minutes ago             compassionate_varahamihira
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 22 minutes               80/tcp    determined_goodall
d8cca0a8d62c   ubuntu        "bash"               16 hours ago     Exited (0) 16 hours ago               charming_liskov
[root@localhost ~]# docker rm a3c9542f3076
a3c9542f3076
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             30 minutes ago   Exited (0) 30 minutes ago             hungry_satoshi
e3cb8e2fbf42   hello-world   "/hello"             32 minutes ago   Exited (0) 32 minutes ago             crazy_wu
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 23 minutes                         dreamy_northcutt
0584214f703b   ubuntu        "bash"               16 hours ago     Exited (0) 39 minutes ago             compassionate_varahamihira
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 23 minutes               80/tcp    determined_goodall
d8cca0a8d62c   ubuntu        "bash"               16 hours ago     Exited (0) 16 hours ago               charming_liskov
[root@localhost ~]# docker rm d8cca0a8d62c
d8cca0a8d62c
[root@localhost ~]# docker rm d0584214f703b
Error: No such container: d0584214f703b
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             30 minutes ago   Exited (0) 30 minutes ago             hungry_satoshi
e3cb8e2fbf42   hello-world   "/hello"             32 minutes ago   Exited (0) 32 minutes ago             crazy_wu
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 24 minutes                         dreamy_northcutt
0584214f703b   ubuntu        "bash"               16 hours ago     Exited (0) 40 minutes ago             compassionate_varahamihira
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 24 minutes               80/tcp    determined_goodall
[root@localhost ~]# docker start 0584214f703b
0584214f703b
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             30 minutes ago   Exited (0) 30 minutes ago             hungry_satoshi
e3cb8e2fbf42   hello-world   "/hello"             33 minutes ago   Exited (0) 33 minutes ago             crazy_wu
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 24 minutes                         dreamy_northcutt
0584214f703b   ubuntu        "bash"               16 hours ago     Up 3 seconds                          compassionate_varahamihira
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 24 minutes               80/tcp    determined_goodall
[root@localhost ~]# docker rm 0584214f703b
Error response from daemon: You cannot remove a running container 0584214f703b7915a6af8702068d341faba36d6356d535c33c64c010b07795e5. Stop the container before attempting removal or force remove
[root@localhost ~]# docker stop  0584214f703b
0584214f703b
[root@localhost ~]# docker rm 0584214f703b
\0584214f703b
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             31 minutes ago   Exited (0) 31 minutes ago             hungry_satoshi
e3cb8e2fbf42   hello-world   "/hello"             33 minutes ago   Exited (0) 33 minutes ago             crazy_wu
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 25 minutes                         dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 24 minutes               80/tcp    determined_goodall
[root@localhost ~]# docker restart e3cb8e2fbf42
e3cb8e2fbf42
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             31 minutes ago   Exited (0) 31 minutes ago             hungry_satoshi
e3cb8e2fbf42   hello-world   "/hello"             34 minutes ago   Exited (0) 2 seconds ago              crazy_wu
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 25 minutes                         dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 25 minutes               80/tcp    determined_goodall
[root@localhost ~]# docker stop e3cb8e2fbf42
e3cb8e2fbf42
[root@localhost ~]# docker rm e3cb8e2fbf42
e3cb8e2fbf42
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             32 minutes ago   Exited (0) 32 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 25 minutes                         dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 25 minutes               80/tcp    determined_goodall
[root@localhost ~]# docker start d4a3a68b47a9
d4a3a68b47a9
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                    PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             32 minutes ago   Exited (0) 1 second ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 25 minutes                       dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 25 minutes             80/tcp    determined_goodall
[root@localhost ~]# history
    1  ifconfig
    2  history
    3  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  sudo yum install docker-ce
    9  docker -v
   10  sudo systemctl enable docker
   11  sudo systemctl start docker
   12  docker info
   13*
   14  docker info
   15  sudo docker run hello-world
   16  docker ps -a
   17  history
   18  sudo docker run hello-world
   19  docker ps
   20  docker ps -a
   21  docker start 75cafc0d6fee
   22  docker start d83c0d7cfc94
   23  docker ps -a
   24  docker --help
   25  docker update 75cafc0d6fee
   26  docker update 75cafc0d6fee d83c0d7cfc94
   27  yum install git -y
   28  git --version
   29  yum install gi
   30  docker info
   31  docker -v
   32  which dcoker
   33  which docker
   34  which dockerd
   35  ps -eaf | grep dockerd
   36  which containerd
   37  docker -eaf | grep containerd
   38  ps -eaf | grep containerd
   39  history
   40  docker ps -a
   41  docker pull ubuntu
   42  docker ps -a
   43  docker rm a3c9542f3076
   44  docker ps -a
   45  docker rm d8cca0a8d62c
   46  docker rm d0584214f703b
   47  docker ps -a
   48  docker start 0584214f703b
   49  docker ps -a
   50  docker rm 0584214f703b
   51* docker
   52  docker rm 0584214f703b
   53  docker ps -a
   54  docker restart e3cb8e2fbf42
   55  docker ps -a
   56  docker stop e3cb8e2fbf42
   57  docker rm e3cb8e2fbf42
   58  docker ps -a
   59  docker start d4a3a68b47a9
   60  docker ps -a
   61  history
[root@localhost ~]# docker pause d4a3a68b47a9
Error response from daemon: Container d4a3a68b47a90d5adfd9e8763289ae03744596a642b932087c9457bc5044d5d4 is not running
[root@localhost ~]# docker start d4a3a68b47a9
d4a3a68b47a9
[root@localhost ~]# history
    1  ifconfig
    2  history
    3  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  sudo yum install docker-ce
    9  docker -v
   10  sudo systemctl enable docker
   11  sudo systemctl start docker
   12  docker info
   13*
   14  docker info
   15  sudo docker run hello-world
   16  docker ps -a
   17  history
   18  sudo docker run hello-world
   19  docker ps
   20  docker ps -a
   21  docker start 75cafc0d6fee
   22  docker start d83c0d7cfc94
   23  docker ps -a
   24  docker --help
   25  docker update 75cafc0d6fee
   26  docker update 75cafc0d6fee d83c0d7cfc94
   27  yum install git -y
   28  git --version
   29  yum install gi
   30  docker info
   31  docker -v
   32  which dcoker
   33  which docker
   34  which dockerd
   35  ps -eaf | grep dockerd
   36  which containerd
   37  docker -eaf | grep containerd
   38  ps -eaf | grep containerd
   39  history
   40  docker ps -a
   41  docker pull ubuntu
   42  docker ps -a
   43  docker rm a3c9542f3076
   44  docker ps -a
   45  docker rm d8cca0a8d62c
   46  docker rm d0584214f703b
   47  docker ps -a
   48  docker start 0584214f703b
   49  docker ps -a
   50  docker rm 0584214f703b
   51* docker
   52  docker rm 0584214f703b
   53  docker ps -a
   54  docker restart e3cb8e2fbf42
   55  docker ps -a
   56  docker stop e3cb8e2fbf42
   57  docker rm e3cb8e2fbf42
   58  docker ps -a
   59  docker start d4a3a68b47a9
   60  docker ps -a
   61  history
   62  docker pause d4a3a68b47a9
   63  docker start d4a3a68b47a9
   64  history
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                     PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             33 minutes ago   Exited (0) 7 seconds ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 26 minutes                        dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 26 minutes              80/tcp    determined_goodall
[root@localhost ~]# docker pull https
Using default tag: latest
Error response from daemon: pull access denied for https, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                     PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             34 minutes ago   Exited (0) 2 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 28 minutes                        dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 28 minutes              80/tcp    determined_goodall
[root@localhost ~]# docker exec -it 75cafc0d6fee  /bin/bash
root@75cafc0d6fee:/# docker pull ubuntu
bash: docker: command not found
root@75cafc0d6fee:/# read escape sequence
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                     PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             37 minutes ago   Exited (0) 4 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 30 minutes                        dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Up 30 minutes              80/tcp    determined_goodall
[root@localhost ~]# docker kill d83c0d7cfc94
d83c0d7cfc94
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                       PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"             37 minutes ago   Exited (0) 4 minutes ago               hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 31 minutes                          dreamy_northcutt
d83c0d7cfc94   httpd         "httpd-foreground"   16 hours ago     Exited (137) 2 seconds ago             determined_goodall
[root@localhost ~]# docker rm d83c0d7cfc94
d83c0d7cfc94
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                     PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"   37 minutes ago   Exited (0) 4 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 31 minutes                        dreamy_northcutt
[root@localhost ~]# docker kill d4a3a68b47a9
Error response from daemon: Cannot kill container: d4a3a68b47a9: Container d4a3a68b47a90d5adfd9e8763289ae03744596a642b932087c9457bc5044d5d4 is not running
[root@localhost ~]# docker start d4a3a68b47a9
d4a3a68b47a9
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                     PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"   38 minutes ago   Exited (0) 2 seconds ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 31 minutes                        dreamy_northcutt
[root@localhost ~]# docker pull https
Using default tag: latest
Error response from daemon: pull access denied for https, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
[root@localhost ~]# docker pull httpd
Using default tag: latest
latest: Pulling from library/httpd
Digest: sha256:1fd07d599a519b594b756d2e4e43a72edf7e30542ce646f5eb3328cf3b12341a
Status: Image is up to date for httpd:latest
docker.io/library/httpd:latest
[root@localhost ~]# history
    1  ifconfig
    2  history
    3  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  sudo yum install docker-ce
    9  docker -v
   10  sudo systemctl enable docker
   11  sudo systemctl start docker
   12  docker info
   13*
   14  docker info
   15  sudo docker run hello-world
   16  docker ps -a
   17  history
   18  sudo docker run hello-world
   19  docker ps
   20  docker ps -a
   21  docker start 75cafc0d6fee
   22  docker start d83c0d7cfc94
   23  docker ps -a
   24  docker --help
   25  docker update 75cafc0d6fee
   26  docker update 75cafc0d6fee d83c0d7cfc94
   27  yum install git -y
   28  git --version
   29  yum install gi
   30  docker info
   31  docker -v
   32  which dcoker
   33  which docker
   34  which dockerd
   35  ps -eaf | grep dockerd
   36  which containerd
   37  docker -eaf | grep containerd
   38  ps -eaf | grep containerd
   39  history
   40  docker ps -a
   41  docker pull ubuntu
   42  docker ps -a
   43  docker rm a3c9542f3076
   44  docker ps -a
   45  docker rm d8cca0a8d62c
   46  docker rm d0584214f703b
   47  docker ps -a
   48  docker start 0584214f703b
   49  docker ps -a
   50  docker rm 0584214f703b
   51* docker
   52  docker rm 0584214f703b
   53  docker ps -a
   54  docker restart e3cb8e2fbf42
   55  docker ps -a
   56  docker stop e3cb8e2fbf42
   57  docker rm e3cb8e2fbf42
   58  docker ps -a
   59  docker start d4a3a68b47a9
   60  docker ps -a
   61  history
   62  docker pause d4a3a68b47a9
   63  docker start d4a3a68b47a9
   64  history
   65  docker ps -a
   66  docker pull https
   67  docker ps -a
   68  docker exec -it 75cafc0d6fee  /bin/bash
   69  docker ps -a
   70  docker kill d83c0d7cfc94
   71  docker ps -a
   72  docker rm d83c0d7cfc94
   73  docker ps -a
   74  docker kill d4a3a68b47a9
   75  docker start d4a3a68b47a9
   76  docker ps -a
   77  docker pull https
   78  docker pull httpd
   79  history
[root@localhost ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED        SIZE
ubuntu        latest    c29284518f49   7 days ago     72.8MB
httpd         latest    bd29370f84ea   12 days ago    138MB
hello-world   latest    d1165f221234   4 months ago   13.3kB
[root@localhost ~]# docker run -d ubuntu
8b4b7eae0d663d0b9b88ef53a76c56e563b45968e7ef10961ed037f4a3b939f9
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                     PORTS     NAMES
8b4b7eae0d66   ubuntu        "bash"     7 seconds ago    Exited (0) 6 seconds ago             brave_shirley
d4a3a68b47a9   hello-world   "/hello"   43 minutes ago   Exited (0) 5 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 37 minutes                        dreamy_northcutt
[root@localhost ~]# docker start 8b4b7eae0d66
8b4b7eae0d66
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED              STATUS                     PORTS     NAMES
8b4b7eae0d66   ubuntu        "bash"     About a minute ago   Exited (0) 1 second ago              brave_shirley
d4a3a68b47a9   hello-world   "/hello"   44 minutes ago       Exited (0) 6 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago          Up 38 minutes                        dreamy_northcutt
[root@localhost ~]# docker rm 8b4b7eae0d66
8b4b7eae0d66
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                     PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"   45 minutes ago   Exited (0) 7 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 38 minutes                        dreamy_northcutt
[root@localhost ~]# docker run -d ubuntu
79e0ca51ae3062ee53f9cdcdcaecd8a5b72efec47472f22954e23a252a69ef5e
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                     PORTS     NAMES
79e0ca51ae30   ubuntu        "bash"     4 seconds ago    Exited (0) 3 seconds ago             elated_fermat
d4a3a68b47a9   hello-world   "/hello"   45 minutes ago   Exited (0) 7 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 39 minutes                        dreamy_northcutt
[root@localhost ~]# docker kill 79e0ca51ae30
Error response from daemon: Cannot kill container: 79e0ca51ae30: Container 79e0ca51ae3062ee53f9cdcdcaecd8a5b72efec47472f22954e23a252a69ef5e is not running
[root@localhost ~]# docker start 79e0ca51ae30
79e0ca51ae30
[root@localhost ~]# docker kill 79e0ca51ae30
Error response from daemon: Cannot kill container: 79e0ca51ae30: Container 79e0ca51ae3062ee53f9cdcdcaecd8a5b72efec47472f22954e23a252a69ef5e is not running
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
79e0ca51ae30   ubuntu        "bash"     51 seconds ago   Exited (0) 15 seconds ago             elated_fermat
d4a3a68b47a9   hello-world   "/hello"   46 minutes ago   Exited (0) 8 minutes ago              hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 39 minutes                         dreamy_northcutt
[root@localhost ~]# docker kill 79e0ca51ae30
Error response from daemon: Cannot kill container: 79e0ca51ae30: Container 79e0ca51ae3062ee53f9cdcdcaecd8a5b72efec47472f22954e23a252a69ef5e is not running
[root@localhost ~]# docker start 79e0ca51ae30
79e0ca51ae30
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED              STATUS                     PORTS     NAMES
79e0ca51ae30   ubuntu        "bash"     About a minute ago   Exited (0) 4 seconds ago             elated_fermat
d4a3a68b47a9   hello-world   "/hello"   46 minutes ago       Exited (0) 8 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago          Up 40 minutes                        dreamy_northcutt
[root@localhost ~]# history
    1  ifconfig
    2  history
    3  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  sudo yum install docker-ce
    9  docker -v
   10  sudo systemctl enable docker
   11  sudo systemctl start docker
   12  docker info
   13*
   14  docker info
   15  sudo docker run hello-world
   16  docker ps -a
   17  history
   18  sudo docker run hello-world
   19  docker ps
   20  docker ps -a
   21  docker start 75cafc0d6fee
   22  docker start d83c0d7cfc94
   23  docker ps -a
   24  docker --help
   25  docker update 75cafc0d6fee
   26  docker update 75cafc0d6fee d83c0d7cfc94
   27  yum install git -y
   28  git --version
   29  yum install gi
   30  docker info
   31  docker -v
   32  which dcoker
   33  which docker
   34  which dockerd
   35  ps -eaf | grep dockerd
   36  which containerd
   37  docker -eaf | grep containerd
   38  ps -eaf | grep containerd
   39  history
   40  docker ps -a
   41  docker pull ubuntu
   42  docker ps -a
   43  docker rm a3c9542f3076
   44  docker ps -a
   45  docker rm d8cca0a8d62c
   46  docker rm d0584214f703b
   47  docker ps -a
   48  docker start 0584214f703b
   49  docker ps -a
   50  docker rm 0584214f703b
   51* docker
   52  docker rm 0584214f703b
   53  docker ps -a
   54  docker restart e3cb8e2fbf42
   55  docker ps -a
   56  docker stop e3cb8e2fbf42
   57  docker rm e3cb8e2fbf42
   58  docker ps -a
   59  docker start d4a3a68b47a9
   60  docker ps -a
   61  history
   62  docker pause d4a3a68b47a9
   63  docker start d4a3a68b47a9
   64  history
   65  docker ps -a
   66  docker pull https
   67  docker ps -a
   68  docker exec -it 75cafc0d6fee  /bin/bash
   69  docker ps -a
   70  docker kill d83c0d7cfc94
   71  docker ps -a
   72  docker rm d83c0d7cfc94
   73  docker ps -a
   74  docker kill d4a3a68b47a9
   75  docker start d4a3a68b47a9
   76  docker ps -a
   77  docker pull https
   78  docker pull httpd
   79  history
   80  docker images
   81  docker run -d ubuntu
   82  docker ps -a
   83  docker start 8b4b7eae0d66
   84  docker ps -a
   85  docker rm 8b4b7eae0d66
   86  docker ps -a
   87  docker run -d ubuntu
   88  docker ps -a
   89  docker kill 79e0ca51ae30
   90  docker start 79e0ca51ae30
   91  docker kill 79e0ca51ae30
   92  docker ps -a
   93  docker kill 79e0ca51ae30
   94  docker start 79e0ca51ae30
   95  docker ps -a
   96  history
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED              STATUS                      PORTS     NAMES
79e0ca51ae30   ubuntu        "bash"     About a minute ago   Exited (0) 20 seconds ago             elated_fermat
d4a3a68b47a9   hello-world   "/hello"   46 minutes ago       Exited (0) 8 minutes ago              hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago          Up 40 minutes                         dreamy_northcutt
[root@localhost ~]# docker pause 79e0ca51ae30
Error response from daemon: Container 79e0ca51ae3062ee53f9cdcdcaecd8a5b72efec47472f22954e23a252a69ef5e is not running
[root@localhost ~]# docker start 79e0ca51ae30
79e0ca51ae30
[root@localhost ~]# docker start 79e0ca51ae30
79e0ca51ae30
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                     PORTS     NAMES
79e0ca51ae30   ubuntu        "bash"     2 minutes ago    Exited (0) 4 seconds ago             elated_fermat
d4a3a68b47a9   hello-world   "/hello"   47 minutes ago   Exited (0) 9 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 41 minutes                        dreamy_northcutt
[root@localhost ~]# docker inpsect 75cafc0d6fee
docker: 'inpsect' is not a docker command.
See 'docker --help'
[root@localhost ~]# docker inspect 75cafc0d6fee
[
    {
        "Id": "75cafc0d6feed6e3bb58e5440848615c1d632b0608787f773cfdf7324289f9f0",
        "Created": "2021-07-21T03:23:53.810010743Z",
        "Path": "bash",
        "Args": [],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 32298,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2021-07-21T04:57:11.432175262Z",
            "FinishedAt": "2021-07-21T04:41:15.614452246Z"
        },
        "Image": "sha256:c29284518f497b8c5f49933e74e43ca5221e69c8251e780427f7d12f716625ff",
        "ResolvConfPath": "/var/lib/docker/containers/75cafc0d6feed6e3bb58e5440848615c1d632b0608787f773cfdf7324289f9f0/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/75cafc0d6feed6e3bb58e5440848615c1d632b0608787f773cfdf7324289f9f0/hostname",
        "HostsPath": "/var/lib/docker/containers/75cafc0d6feed6e3bb58e5440848615c1d632b0608787f773cfdf7324289f9f0/hosts",
        "LogPath": "/var/lib/docker/containers/75cafc0d6feed6e3bb58e5440848615c1d632b0608787f773cfdf7324289f9f0/75cafc0d6feed6e3bb58e5440848615c1d632b0608787f773cfdf7324289f9f0-json.log",
        "Name": "/dreamy_northcutt",
        "RestartCount": 0,
        "Driver": "overlay2",
        "Platform": "linux",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": [
            "864011e4b2d1dfa64dd0bfe4bba63f4b68a4968fbfea75c37d4a6b4c469b4604"
        ],
        "HostConfig": {
            "Binds": null,
            "ContainerIDFile": "",
            "LogConfig": {
                "Type": "json-file",
                "Config": {}
            },
            "NetworkMode": "default",
            "PortBindings": {},
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
            "AutoRemove": false,
            "VolumeDriver": "",
            "VolumesFrom": null,
            "CapAdd": null,
            "CapDrop": null,
            "CgroupnsMode": "host",
            "Dns": [],
            "DnsOptions": [],
            "DnsSearch": [],
            "ExtraHosts": null,
            "GroupAdd": null,
            "IpcMode": "private",
            "Cgroup": "",
            "Links": null,
            "OomScoreAdj": 0,
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": null,
            "UTSMode": "",
            "UsernsMode": "",
            "ShmSize": 67108864,
            "Runtime": "runc",
            "ConsoleSize": [
                0,
                0
            ],
            "Isolation": "",
            "CpuShares": 0,
            "Memory": 0,
            "NanoCpus": 0,
            "CgroupParent": "",
            "BlkioWeight": 0,
            "BlkioWeightDevice": [],
            "BlkioDeviceReadBps": null,
            "BlkioDeviceWriteBps": null,
            "BlkioDeviceReadIOps": null,
            "BlkioDeviceWriteIOps": null,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpuRealtimePeriod": 0,
            "CpuRealtimeRuntime": 0,
            "CpusetCpus": "",
            "CpusetMems": "",
            "Devices": [],
            "DeviceCgroupRules": null,
            "DeviceRequests": null,
            "KernelMemory": 0,
            "KernelMemoryTCP": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": null,
            "OomKillDisable": false,
            "PidsLimit": null,
            "Ulimits": null,
            "CpuCount": 0,
            "CpuPercent": 0,
            "IOMaximumIOps": 0,
            "IOMaximumBandwidth": 0,
            "MaskedPaths": [
                "/proc/asound",
                "/proc/acpi",
                "/proc/kcore",
                "/proc/keys",
                "/proc/latency_stats",
                "/proc/timer_list",
                "/proc/timer_stats",
                "/proc/sched_debug",
                "/proc/scsi",
                "/sys/firmware"
            ],
            "ReadonlyPaths": [
                "/proc/bus",
                "/proc/fs",
                "/proc/irq",
                "/proc/sys",
                "/proc/sysrq-trigger"
            ]
        },
        "GraphDriver": {
            "Data": {
                "LowerDir": "/var/lib/docker/overlay2/d979e83f418815ba41cdfe9cfa314d2da9a026c7d0fc49a06a4e28784d5d0344-init/diff:/var/lib/docker/overlay2/30c379b2ef0344227b749d85f2b3acb2f4eb5e80d5eb3d6c774e0756c44bed8b/diff",
                "MergedDir": "/var/lib/docker/overlay2/d979e83f418815ba41cdfe9cfa314d2da9a026c7d0fc49a06a4e28784d5d0344/merged",
                "UpperDir": "/var/lib/docker/overlay2/d979e83f418815ba41cdfe9cfa314d2da9a026c7d0fc49a06a4e28784d5d0344/diff",
                "WorkDir": "/var/lib/docker/overlay2/d979e83f418815ba41cdfe9cfa314d2da9a026c7d0fc49a06a4e28784d5d0344/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [],
        "Config": {
            "Hostname": "75cafc0d6fee",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "Tty": true,
            "OpenStdin": true,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
            ],
            "Cmd": [
                "bash"
            ],
            "Image": "ubuntu",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {}
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "821e502e4615f46592ded9f5a9c098e44452e1a2adba95ff449d6e67514247ee",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/821e502e4615",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "33fd5c8c291ed8b68ef28bd85588d1429126f5ecf195edc29b39daf095333bf9",
            "Gateway": "172.17.0.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "172.17.0.2",
            "IPPrefixLen": 16,
            "IPv6Gateway": "",
            "MacAddress": "02:42:ac:11:00:02",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "5a526772a3eb1f99a77458456bc2af5652af8bef81fb6d7c84d4f901d882936c",
                    "EndpointID": "33fd5c8c291ed8b68ef28bd85588d1429126f5ecf195edc29b39daf095333bf9",
                    "Gateway": "172.17.0.1",
                    "IPAddress": "172.17.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:11:00:02",
                    "DriverOpts": null
                }
            }
        }
    }
]
[root@localhost ~]# df -kh
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 1.9G     0  1.9G   0% /dev
tmpfs                    1.9G     0  1.9G   0% /dev/shm
tmpfs                    1.9G  9.6M  1.9G   1% /run
tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/centos-root   50G  7.3G   43G  15% /
/dev/mapper/centos-home   46G   33M   46G   1% /home
/dev/sda1               1014M  235M  780M  24% /boot
tmpfs                    379M   32K  379M   1% /run/user/0
/dev/sr0                  59M   59M     0 100% /run/media/root/VBox_GAs_6.1.22
overlay                   50G  7.3G   43G  15% /var/lib/docker/overlay2/d979e83f418815ba41cdfe9cfa314d2da9a026c7d0fc49a06a4e28784d5d0344/merged
[root@localhost ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED        SIZE
ubuntu        latest    c29284518f49   7 days ago     72.8MB
httpd         latest    bd29370f84ea   12 days ago    138MB
hello-world   latest    d1165f221234   4 months ago   13.3kB
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
79e0ca51ae30   ubuntu        "bash"     4 minutes ago    Exited (0) 2 minutes ago              elated_fermat
d4a3a68b47a9   hello-world   "/hello"   50 minutes ago   Exited (0) 11 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 43 minutes                         dreamy_northcutt
[root@localhost ~]# docker run ubuntu ls
bin
boot
dev
etc
home
lib
lib32
lib64
libx32
media
mnt
opt
proc
root
run
sbin
srv
sys
tmp
usr
var
[root@localhost ~]# docker run -d https
Unable to find image 'https:latest' locally
docker: Error response from daemon: pull access denied for https, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.
See 'docker run --help'.
[root@localhost ~]# docker pull https
Using default tag: latest
^[[A^C
[root@localhost ~]# ^C
[root@localhost ~]# ^C
[root@localhost ~]# ^C
[root@localhost ~]# ^C
[root@localhost ~]# docker pull httpd
Using default tag: latest
latest: Pulling from library/httpd
Digest: sha256:1fd07d599a519b594b756d2e4e43a72edf7e30542ce646f5eb3328cf3b12341a
Status: Image is up to date for httpd:latest
docker.io/library/httpd:latest
[root@localhost ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED        SIZE
ubuntu        latest    c29284518f49   7 days ago     72.8MB
httpd         latest    bd29370f84ea   12 days ago    138MB
hello-world   latest    d1165f221234   4 months ago   13.3kB
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED              STATUS                          PORTS     NAMES
82da9c001d75   ubuntu        "ls"       About a minute ago   Exited (0) About a minute ago             intelligent_napier
79e0ca51ae30   ubuntu        "bash"     6 minutes ago        Exited (0) 4 minutes ago                  elated_fermat
d4a3a68b47a9   hello-world   "/hello"   51 minutes ago       Exited (0) 13 minutes ago                 hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago          Up 45 minutes                             dreamy_northcutt
[root@localhost ~]# docker stop 82da9c001d75
82da9c001d75
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED              STATUS                          PORTS     NAMES
82da9c001d75   ubuntu        "ls"       About a minute ago   Exited (0) About a minute ago             intelligent_napier
79e0ca51ae30   ubuntu        "bash"     6 minutes ago        Exited (0) 4 minutes ago                  elated_fermat
d4a3a68b47a9   hello-world   "/hello"   52 minutes ago       Exited (0) 14 minutes ago                 hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago          Up 45 minutes                             dreamy_northcutt
[root@localhost ~]# docker kill 82da9c001d75
Error response from daemon: Cannot kill container: 82da9c001d75: Container 82da9c001d75bc4d5a604e0bb970678e36f0fc9bbd24c66afd3abf3a34f010fb is not running
[root@localhost ~]# sudo yum remove docker docker-engine
Loaded plugins: fastestmirror, langpacks
No Match for argument: docker
No Match for argument: docker-engine
No Packages marked for removal
[root@localhost ~]# sudo yum remove docker docker-engine-selinux
Loaded plugins: fastestmirror, langpacks
No Match for argument: docker
Resolving Dependencies
--> Running transaction check
---> Package container-selinux.noarch 2:2.119.2-1.911c772.el7_8 will be erased
--> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Processing Dependency: container-selinux >= 2:2.74 for package: containerd.io-1.4.8-3.1.el7.x86_64
--> Running transaction check
---> Package containerd.io.x86_64 0:1.4.8-3.1.el7 will be erased
---> Package docker-ce.x86_64 3:20.10.7-3.el7 will be erased
--> Processing Dependency: docker-ce for package: docker-ce-rootless-extras-20.10.7-3.el7.x86_64
--> Running transaction check
---> Package docker-ce-rootless-extras.x86_64 0:20.10.7-3.el7 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================================
 Package                                        Arch                        Version                                        Repository                              Size
========================================================================================================================================================================
Removing:
 container-selinux                              noarch                      2:2.119.2-1.911c772.el7_8                      @extras                                 41 k
Removing for dependencies:
 containerd.io                                  x86_64                      1.4.8-3.1.el7                                  @docker-ce-stable                      112 M
 docker-ce                                      x86_64                      3:20.10.7-3.el7                                @docker-ce-stable                      115 M
 docker-ce-rootless-extras                      x86_64                      20.10.7-3.el7                                  @docker-ce-stable                       24 M

Transaction Summary
========================================================================================================================================================================
Remove  1 Package (+3 Dependent packages)

Installed size: 251 M
Is this ok [y/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Erasing    : docker-ce-rootless-extras-20.10.7-3.el7.x86_64                                                                                                       1/4
  Erasing    : 3:docker-ce-20.10.7-3.el7.x86_64                                                                                                                     2/4
  Erasing    : containerd.io-1.4.8-3.1.el7.x86_64                                                                                                                   3/4
  Erasing    : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                                                                                                   4/4
  Verifying  : 3:docker-ce-20.10.7-3.el7.x86_64                                                                                                                     1/4
  Verifying  : containerd.io-1.4.8-3.1.el7.x86_64                                                                                                                   2/4
  Verifying  : docker-ce-rootless-extras-20.10.7-3.el7.x86_64                                                                                                       3/4
  Verifying  : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                                                                                                   4/4

Removed:
  container-selinux.noarch 2:2.119.2-1.911c772.el7_8

Dependency Removed:
  containerd.io.x86_64 0:1.4.8-3.1.el7                 docker-ce.x86_64 3:20.10.7-3.el7                 docker-ce-rootless-extras.x86_64 0:20.10.7-3.el7

Complete!
[root@localhost ~]# docker images
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[root@localhost ~]# docker ps -a
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[root@localhost ~]# sudo -s
[root@localhost ~]# sudo yum install -y yum-utils device-mapper-persistent-data lvm2
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
Package yum-utils-1.1.31-54.el7_8.noarch already installed and latest version
Package device-mapper-persistent-data-0.8.5-3.el7_9.2.x86_64 already installed and latest version
Package 7:lvm2-2.02.187-6.el7_9.5.x86_64 already installed and latest version
Nothing to do
[root@localhost ~]# docker ps -a
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[root@localhost ~]# sudo yum install -y yum-utils device-mapper-persistent-data lvm2sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo^C
[root@localhost ~]# sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror, langpacks
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@localhost ~]# sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
epel-release-latest-7.noarch.rpm                                                                                                                 |  15 kB  00:00:00
Examining /var/tmp/yum-root-hE30PM/epel-release-latest-7.noarch.rpm: epel-release-7-13.noarch
/var/tmp/yum-root-hE30PM/epel-release-latest-7.noarch.rpm: does not update installed package.
Error: Nothing to do
[root@localhost ~]# sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
Loaded plugins: fastestmirror, langpacks
[root@localhost ~]# sudo yum-config-manager --enable rhui-REGION-rhel-server-extrassudo yum install -y docker-ce^C
[root@localhost ~]# ^C
[root@localhost ~]# ^C
[root@localhost ~]# sudo yum install -y docker-ce
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.excellmedia.net
 * epel: repos.del.extreme-ix.org
 * extras: centos.excellmedia.net
 * updates: centos.excellmedia.net
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 3:20.10.7-3.el7 will be installed
--> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Processing Dependency: containerd.io >= 1.4.1 for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Processing Dependency: docker-ce-rootless-extras for package: 3:docker-ce-20.10.7-3.el7.x86_64
--> Running transaction check
---> Package container-selinux.noarch 2:2.119.2-1.911c772.el7_8 will be installed
---> Package containerd.io.x86_64 0:1.4.8-3.1.el7 will be installed
---> Package docker-ce-rootless-extras.x86_64 0:20.10.7-3.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================================
 Package                                        Arch                        Version                                         Repository                             Size
========================================================================================================================================================================
Installing:
 docker-ce                                      x86_64                      3:20.10.7-3.el7                                 docker-ce-stable                       27 M
Installing for dependencies:
 container-selinux                              noarch                      2:2.119.2-1.911c772.el7_8                       extras                                 40 k
 containerd.io                                  x86_64                      1.4.8-3.1.el7                                   docker-ce-stable                       30 M
 docker-ce-rootless-extras                      x86_64                      20.10.7-3.el7                                   docker-ce-stable                      9.2 M

Transaction Summary
========================================================================================================================================================================
Install  1 Package (+3 Dependent packages)

Total download size: 66 M
Installed size: 251 M
Downloading packages:
(1/4): container-selinux-2.119.2-1.911c772.el7_8.noarch.rpm                                                                                      |  40 kB  00:00:00
(2/4): containerd.io-1.4.8-3.1.el7.x86_64.rpm                                                                                                    |  30 MB  00:00:07
(3/4): docker-ce-20.10.7-3.el7.x86_64.rpm                                                                                                        |  27 MB  00:00:08
(4/4): docker-ce-rootless-extras-20.10.7-3.el7.x86_64.rpm                                                                                        | 9.2 MB  00:00:01
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                   7.3 MB/s |  66 MB  00:00:08
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                                                                                                   1/4
  Installing : containerd.io-1.4.8-3.1.el7.x86_64                                                                                                                   2/4
  Installing : docker-ce-rootless-extras-20.10.7-3.el7.x86_64                                                                                                       3/4
  Installing : 3:docker-ce-20.10.7-3.el7.x86_64                                                                                                                     4/4
  Verifying  : 3:docker-ce-20.10.7-3.el7.x86_64                                                                                                                     1/4
  Verifying  : containerd.io-1.4.8-3.1.el7.x86_64                                                                                                                   2/4
  Verifying  : docker-ce-rootless-extras-20.10.7-3.el7.x86_64                                                                                                       3/4
  Verifying  : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                                                                                                   4/4

Installed:
  docker-ce.x86_64 3:20.10.7-3.el7

Dependency Installed:
  container-selinux.noarch 2:2.119.2-1.911c772.el7_8           containerd.io.x86_64 0:1.4.8-3.1.el7           docker-ce-rootless-extras.x86_64 0:20.10.7-3.el7

Complete!
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
82da9c001d75   ubuntu        "ls"       6 minutes ago    Exited (0) 6 minutes ago              intelligent_napier
79e0ca51ae30   ubuntu        "bash"     11 minutes ago   Exited (0) 9 minutes ago              elated_fermat
d4a3a68b47a9   hello-world   "/hello"   56 minutes ago   Exited (0) 18 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Exited (0) 3 minutes ago              dreamy_northcutt
[root@localhost ~]# docker start 75cafc0d6fee
75cafc0d6fee
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
82da9c001d75   ubuntu        "ls"       6 minutes ago    Exited (0) 6 minutes ago              intelligent_napier
79e0ca51ae30   ubuntu        "bash"     11 minutes ago   Exited (0) 9 minutes ago              elated_fermat
d4a3a68b47a9   hello-world   "/hello"   57 minutes ago   Exited (0) 18 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 1 second                           dreamy_northcutt
[root@localhost ~]# docker kill 82da9c001d75
Error response from daemon: Cannot kill container: 82da9c001d75: Container 82da9c001d75bc4d5a604e0bb970678e36f0fc9bbd24c66afd3abf3a34f010fb is not running
[root@localhost ~]# docker start 82da9c001d75
82da9c001d75
[root@localhost ~]# docker kill 82da9c001d75
Error response from daemon: Cannot kill container: 82da9c001d75: Container 82da9c001d75bc4d5a604e0bb970678e36f0fc9bbd24c66afd3abf3a34f010fb is not running
[root@localhost ~]# docker rm 82da9c001d75
82da9c001d75
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
79e0ca51ae30   ubuntu        "bash"     12 minutes ago   Exited (0) 10 minutes ago             elated_fermat
d4a3a68b47a9   hello-world   "/hello"   57 minutes ago   Exited (0) 19 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 33 seconds                         dreamy_northcutt
[root@localhost ~]# docker start 79e0ca51ae30
79e0ca51ae30
[root@localhost ~]# docker rm 79e0ca51ae30
79e0ca51ae30
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"   57 minutes ago   Exited (0) 19 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 55 seconds                         dreamy_northcutt
[root@localhost ~]# docker pull https
Using default tag: latest
Error response from daemon: pull access denied for https, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
[root@localhost ~]# docker pull httpd
Using default tag: latest
latest: Pulling from library/httpd
Digest: sha256:1fd07d599a519b594b756d2e4e43a72edf7e30542ce646f5eb3328cf3b12341a
Status: Image is up to date for httpd:latest
docker.io/library/httpd:latest
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
d4a3a68b47a9   hello-world   "/hello"   59 minutes ago   Exited (0) 20 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"     2 hours ago      Up 2 minutes                          dreamy_northcutt
[root@localhost ~]# docker run -d httpd
e57a2bfc474edee7257f9bbc5e80f3f7a1b351c491ac5233b0dc2d39a7b4438a
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                      PORTS     NAMES
e57a2bfc474e   httpd         "httpd-foreground"   3 seconds ago    Up 2 seconds                80/tcp    distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             59 minutes ago   Exited (0) 21 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago      Up 2 minutes                          dreamy_northcutt
[root@localhost ~]# docker exec -it 75cafc0d6fee /bin/bash
root@75cafc0d6fee:/# ls
bin  boot  dev  etc  home  lib  lib32  lib64  libx32  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
root@75cafc0d6fee:/# docker attach 75cafc0d6fee
bash: docker: command not found
root@75cafc0d6fee:/# docker ps
bash: docker: command not found
root@75cafc0d6fee:/# docker run -d -p 80:80 https
bash: docker: command not found
root@75cafc0d6fee:/# docker run -d -p 80:80 httpd
bash: docker: command not found
root@75cafc0d6fee:/# read escape sequence
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS     NAMES
e57a2bfc474e   httpd         "httpd-foreground"   2 minutes ago       Up 2 minutes                80/tcp    distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 23 minutes ago             hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago         Up 4 minutes                          dreamy_northcutt
[root@localhost ~]# docker run -d -p 80:80 httpd
99a9b3f7f56c4280ee8e6a22d4ce39f2f4aad51f36ce5e0afa07c79ae9068591
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS                               NAMES
99a9b3f7f56c   httpd         "httpd-foreground"   4 seconds ago       Up 3 seconds                0.0.0.0:80->80/tcp, :::80->80/tcp   sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   2 minutes ago       Up 2 minutes                80/tcp                              distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 23 minutes ago                                       hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               2 hours ago         Up 5 minutes                                                    dreamy_northcutt
[root@localhost ~]# docker attach 75cafc0d6fee
root@75cafc0d6fee:/# docker ps -a
bash: docker: command not found
root@75cafc0d6fee:/# read escape sequence
[root@localhost ~]# ls
anaconda-ks.cfg  Desktop  Documents  Downloads  initial-setup-ks.cfg  Music  Pictures  Public  Templates  Videos
[root@localhost ~]# history
    1  ifconfig
    2  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    3  docker ps -a
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  docker ps -a
    9  docker start 75cafc0d6fee
   10  docker ps -a
   11  docker kill 82da9c001d75
   12  docker start 82da9c001d75
   13  docker kill 82da9c001d75
   14  docker rm 82da9c001d75
   15  docker ps -a
   16  docker start 79e0ca51ae30
   17  docker rm 79e0ca51ae30
   18  docker ps -a
   19  docker pull https
   20  docker pull httpd
   21  docker ps -a
   22  docker run -d httpd
   23  docker ps -a
   24  docker exec -it 75cafc0d6fee /bin/bash
   25  docker ps -a
   26  docker run -d -p 80:80 httpd
   27  docker ps -a
   28  docker attach 75cafc0d6fee
   29  ls
   30  history
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS                               NAMES
99a9b3f7f56c   httpd         "httpd-foreground"   6 minutes ago       Up 5 minutes                0.0.0.0:80->80/tcp, :::80->80/tcp   sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   8 minutes ago       Up 8 minutes                80/tcp                              distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 29 minutes ago                                       hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago         Up 10 minutes                                                   dreamy_northcutt
[root@localhost ~]#  docker run -d -p 80:80 httpd
106e7c9b43b8efa114e7c3d214252916a089f77e321a9bfd56b073225dfd9e1d
docker: Error response from daemon: driver failed programming external connectivity on endpoint suspicious_allen (9ae2e8337afd2b76abdba61cd63a18c75e96faa2a9a10e2f11c610e1c98d903b): Bind for 0.0.0.0:80 failed: port is already allocated.
[root@localhost ~]# docker run -d -p 81:80 httpddocker run -d -p 81:80 httpd
Unable to find image 'httpddocker:latest' locally
docker: Error response from daemon: pull access denied for httpddocker, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.
See 'docker run --help'.
[root@localhost ~]# docker run -d -p 82:80 httpd
317020ee19e1f218d6c726ae15c55798e09a63f3bf2f6f20b963215e9383244f
[root@localhost ~]# docker run -d -p 81:80
"docker run" requires at least 1 argument.
See 'docker run --help'.

Usage:  docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

Run a command in a new container
[root@localhost ~]# docker run -d -p 81:80 https
Unable to find image 'https:latest' locally
docker: Error response from daemon: pull access denied for https, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.
See 'docker run --help'.
[root@localhost ~]# docker run -d -p 81:80 httpd
7bf8088b0a5f580003c72bc06edd236e3e7094c87c42bdeac0db64418e37a3a4
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED              STATUS                      PORTS                               NAMES
7bf8088b0a5f   httpd         "httpd-foreground"   6 seconds ago        Up 5 seconds                0.0.0.0:81->80/tcp, :::81->80/tcp   suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   58 seconds ago       Up 57 seconds               0.0.0.0:82->80/tcp, :::82->80/tcp   youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   About a minute ago   Created                                                         suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   8 minutes ago        Up 8 minutes                0.0.0.0:80->80/tcp, :::80->80/tcp   sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   11 minutes ago       Up 11 minutes               80/tcp                              distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago    Exited (0) 32 minutes ago                                       hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago          Up 13 minutes                                                   dreamy_northcutt
[root@localhost ~]# history
    1  ifconfig
    2  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    3  docker ps -a
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  docker ps -a
    9  docker start 75cafc0d6fee
   10  docker ps -a
   11  docker kill 82da9c001d75
   12  docker start 82da9c001d75
   13  docker kill 82da9c001d75
   14  docker rm 82da9c001d75
   15  docker ps -a
   16  docker start 79e0ca51ae30
   17  docker rm 79e0ca51ae30
   18  docker ps -a
   19  docker pull https
   20  docker pull httpd
   21  docker ps -a
   22  docker run -d httpd
   23  docker ps -a
   24  docker exec -it 75cafc0d6fee /bin/bash
   25  docker ps -a
   26  docker run -d -p 80:80 httpd
   27  docker ps -a
   28  docker attach 75cafc0d6fee
   29  ls
   30  history
   31  docker ps -a
   32   docker run -d -p 80:80 httpd
   33  docker run -d -p 81:80 httpddocker run -d -p 81:80 httpd
   34  docker run -d -p 82:80 httpd
   35  docker run -d -p 81:80
   36  docker run -d -p 81:80 https
   37  docker run -d -p 81:80 httpd
   38  docker ps -a
   39  history
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS                               NAMES
7bf8088b0a5f   httpd         "httpd-foreground"   4 minutes ago       Up 4 minutes                0.0.0.0:81->80/tcp, :::81->80/tcp   suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   5 minutes ago       Up 5 minutes                0.0.0.0:82->80/tcp, :::82->80/tcp   youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   6 minutes ago       Created                                                         suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   13 minutes ago      Up 13 minutes               0.0.0.0:80->80/tcp, :::80->80/tcp   sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   16 minutes ago      Up 16 minutes               80/tcp                              distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 37 minutes ago                                       hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago         Up 18 minutes                                                   dreamy_northcutt
[root@localhost ~]# docker attach 75cafc0d6fee
root@75cafc0d6fee:/# docker ps -a
bash: docker: command not found
root@75cafc0d6fee:/# read escape sequence
[root@localhost ~]# docker attach 75cafc0d6fee
root@75cafc0d6fee:/# ^C
root@75cafc0d6fee:/# read escape sequence
[root@localhost ~]# ls
anaconda-ks.cfg  Desktop  Documents  Downloads  initial-setup-ks.cfg  Music  Pictures  Public  Templates  Videos
[root@localhost ~]# bash: docker: command not found
bash: bash:: command not found...
Similar command is: 'bash'
[root@localhost ~]# docker images|grep httpd
httpd         latest    bd29370f84ea   12 days ago    138MB
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS                               NAMES
7bf8088b0a5f   httpd         "httpd-foreground"   9 minutes ago       Up 9 minutes                0.0.0.0:81->80/tcp, :::81->80/tcp   suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   10 minutes ago      Up 10 minutes               0.0.0.0:82->80/tcp, :::82->80/tcp   youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   10 minutes ago      Created                                                         suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   18 minutes ago      Up 17 minutes               0.0.0.0:80->80/tcp, :::80->80/tcp   sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   20 minutes ago      Up 20 minutes               80/tcp                              distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 41 minutes ago                                       hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago         Up 22 minutes                                                   dreamy_northcutt
[root@localhost ~]# docker run -d -p 8080:80 --name webserver httpd
39c22cc1cbaf645f9364efc3f0a8120b39f8c12b8338b777b4aa1db7f9656826
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS                                   NAMES
39c22cc1cbaf   httpd         "httpd-foreground"   3 seconds ago       Up 2 seconds                0.0.0.0:8080->80/tcp, :::8080->80/tcp   webserver
7bf8088b0a5f   httpd         "httpd-foreground"   9 minutes ago       Up 9 minutes                0.0.0.0:81->80/tcp, :::81->80/tcp       suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   10 minutes ago      Up 10 minutes               0.0.0.0:82->80/tcp, :::82->80/tcp       youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   10 minutes ago      Created                                                             suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   18 minutes ago      Up 18 minutes               0.0.0.0:80->80/tcp, :::80->80/tcp       sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   20 minutes ago      Up 20 minutes               80/tcp                                  distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 41 minutes ago                                           hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago         Up 23 minutes                                                       dreamy_northcutt
[root@localhost ~]# apt update
bash: apt: command not found...
[root@localhost ~]# curl -O https://raw.githubusercontent.com/spinnaker/halyard/master/install/debian/InstallHalyard.sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  9188  100  9188    0     0  17948      0 --:--:-- --:--:-- --:--:-- 17980
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED             STATUS                      PORTS                                   NAMES
39c22cc1cbaf   httpd         "httpd-foreground"   2 minutes ago       Up 2 minutes                0.0.0.0:8080->80/tcp, :::8080->80/tcp   webserver
7bf8088b0a5f   httpd         "httpd-foreground"   11 minutes ago      Up 11 minutes               0.0.0.0:81->80/tcp, :::81->80/tcp       suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   12 minutes ago      Up 12 minutes               0.0.0.0:82->80/tcp, :::82->80/tcp       youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   12 minutes ago      Created                                                             suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   20 minutes ago      Up 20 minutes               0.0.0.0:80->80/tcp, :::80->80/tcp       sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   22 minutes ago      Up 22 minutes               80/tcp                                  distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             About an hour ago   Exited (0) 44 minutes ago                                           hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago         Up 25 minutes                                                       dreamy_northcutt
[root@localhost ~]# docker attach 75cafc0d6fee
root@75cafc0d6fee:/# curl -O https://raw.githubusercontent.com/spinnaker/halyard/master/install/debian/InstallHalyard.sh
bash: curl: command not found
root@75cafc0d6fee:/# curl -O https://raw.githubusercontent.com/spinnaker/halyard/master/install/debian/InstallHalyard.sh^C
root@75cafc0d6fee:/# ^C
root@75cafc0d6fee:/# sudo bash InstallHalyard.sh
bash: sudo: command not found
root@75cafc0d6fee:/# read escape sequence
[root@localhost ~]# git -version
Unknown option: -version
usage: git [--version] [--help] [-c name=value]
           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
           [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]
           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
           <command> [<args>]
[root@localhost ~]# apt get install apache2
bash: apt: command not found...
[root@localhost ~]# sudo bash InstallHalyard.shdocker run -it ubuntu:latest /bin/bash
bash: InstallHalyard.shdocker: No such file or directory
[root@localhost ~]# apt-get install apache2
bash: apt-get: command not found...
[root@localhost ~]# apt-get install apache2
bash: apt-get: command not found...
[root@localhost ~]# apt-get install apache2
bash: apt-get: command not found...
[root@localhost ~]# docker attach 75cafc0d6fee
root@75cafc0d6fee:/# apt-get install git
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package git
root@75cafc0d6fee:/# apt-get install apache2
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package apache2
root@75cafc0d6fee:/# yum install apache2
bash: yum: command not found
root@75cafc0d6fee:/# E: Unable to locate package apache2
bash: E:: command not found
root@75cafc0d6fee:/# apt install git
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package git
root@75cafc0d6fee:/# docker ps -a
bash: docker: command not found
root@75cafc0d6fee:/# ls
bin  boot  dev  etc  home  lib  lib32  lib64  libx32  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
root@75cafc0d6fee:/# sudo apt-get install git
bash: sudo: command not found
root@75cafc0d6fee:/# which git
root@75cafc0d6fee:/# run apt update
bash: run: command not found
root@75cafc0d6fee:/# apt update
Get:1 http://archive.ubuntu.com/ubuntu focal InRelease [265 kB]
Get:2 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages [11.3 MB]
Get:6 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages [985 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages [1275 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal/multiverse amd64 Packages [177 kB]
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Get:18 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 Packages [32.7 kB]
Fetched 18.6 MB in 7s (2850 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
2 packages can be upgraded. Run 'apt list --upgradable' to see them.
root@75cafc0d6fee:/# apt install -y git
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  ca-certificates git-man krb5-locales less libasn1-8-heimdal libbrotli1 libbsd0 libcbor0.6 libcurl3-gnutls libedit2 liberror-perl libexpat1 libfido2-1
  libgdbm-compat4 libgdbm6 libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libk5crypto3
  libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libldap-common libnghttp2-14 libperl5.30 libpsl5 libroken18-heimdal librtmp1 libsasl2-2
  libsasl2-modules libsasl2-modules-db libsqlite3-0 libssh-4 libssl1.1 libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 netbase
  openssh-client openssl patch perl perl-modules-5.30 publicsuffix xauth
Suggested packages:
  gettext-base git-daemon-run | git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-cvs git-mediawiki git-svn gdbm-l10n krb5-doc krb5-user
  libsasl2-modules-gssapi-mit | libsasl2-modules-gssapi-heimdal libsasl2-modules-ldap libsasl2-modules-otp libsasl2-modules-sql keychain libpam-ssh monkeysphere
  ssh-askpass ed diffutils-doc perl-doc libterm-readline-gnu-perl | libterm-readline-perl-perl make libb-debug-perl liblocale-codes-perl
The following NEW packages will be installed:
  ca-certificates git git-man krb5-locales less libasn1-8-heimdal libbrotli1 libbsd0 libcbor0.6 libcurl3-gnutls libedit2 liberror-perl libexpat1 libfido2-1
  libgdbm-compat4 libgdbm6 libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libk5crypto3
  libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libldap-common libnghttp2-14 libperl5.30 libpsl5 libroken18-heimdal librtmp1 libsasl2-2
  libsasl2-modules libsasl2-modules-db libsqlite3-0 libssh-4 libssl1.1 libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 netbase
  openssh-client openssl patch perl perl-modules-5.30 publicsuffix xauth
0 upgraded, 56 newly installed, 0 to remove and 2 not upgraded.
Need to get 19.7 MB of archives.
After this operation, 110 MB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 perl-modules-5.30 all 5.30.0-9ubuntu0.2 [2738 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal/main amd64 libgdbm6 amd64 1.18.1-5 [27.4 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal/main amd64 libgdbm-compat4 amd64 1.18.1-5 [6244 B]
Get:4 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libperl5.30 amd64 5.30.0-9ubuntu0.2 [3952 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 perl amd64 5.30.0-9ubuntu0.2 [224 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libssl1.1 amd64 1.1.1f-1ubuntu2.4 [1319 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 openssl amd64 1.1.1f-1ubuntu2.4 [620 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 ca-certificates all 20210119~20.04.1 [146 kB]
Get:9 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 less amd64 551-1ubuntu0.1 [123 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal/main amd64 libbsd0 amd64 0.10.0-1 [45.4 kB]
Get:11 http://archive.ubuntu.com/ubuntu focal/main amd64 libexpat1 amd64 2.2.9-1build1 [73.3 kB]
Get:12 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libsqlite3-0 amd64 3.31.1-4ubuntu0.2 [549 kB]
Get:13 http://archive.ubuntu.com/ubuntu focal/main amd64 netbase all 6.1 [13.1 kB]
Get:14 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 krb5-locales all 1.17-6ubuntu4.1 [11.4 kB]
Get:15 http://archive.ubuntu.com/ubuntu focal/main amd64 libcbor0.6 amd64 0.6.0-0ubuntu1 [21.1 kB]
Get:16 http://archive.ubuntu.com/ubuntu focal/main amd64 libedit2 amd64 3.1-20191231-1 [87.0 kB]
Get:17 http://archive.ubuntu.com/ubuntu focal/main amd64 libfido2-1 amd64 1.3.1-1ubuntu2 [47.9 kB]
Get:18 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libkrb5support0 amd64 1.17-6ubuntu4.1 [30.9 kB]
Get:19 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libk5crypto3 amd64 1.17-6ubuntu4.1 [79.9 kB]
Get:20 http://archive.ubuntu.com/ubuntu focal/main amd64 libkeyutils1 amd64 1.6-6ubuntu1 [10.2 kB]
Get:21 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libkrb5-3 amd64 1.17-6ubuntu4.1 [330 kB]
Get:22 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libgssapi-krb5-2 amd64 1.17-6ubuntu4.1 [121 kB]
Get:23 http://archive.ubuntu.com/ubuntu focal/main amd64 libpsl5 amd64 0.21.0-1ubuntu1 [51.5 kB]
Get:24 http://archive.ubuntu.com/ubuntu focal/main amd64 libxau6 amd64 1:1.0.9-0ubuntu1 [7488 B]
Get:25 http://archive.ubuntu.com/ubuntu focal/main amd64 libxdmcp6 amd64 1:1.1.3-0ubuntu1 [10.6 kB]
Get:26 http://archive.ubuntu.com/ubuntu focal/main amd64 libxcb1 amd64 1.14-2 [44.7 kB]
Get:27 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libx11-data all 2:1.6.9-2ubuntu1.2 [113 kB]
Get:28 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libx11-6 amd64 2:1.6.9-2ubuntu1.2 [575 kB]
Get:29 http://archive.ubuntu.com/ubuntu focal/main amd64 libxext6 amd64 2:1.3.4-0ubuntu1 [29.1 kB]
Get:30 http://archive.ubuntu.com/ubuntu focal/main amd64 libxmuu1 amd64 2:1.1.3-0ubuntu1 [9728 B]
Get:31 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 openssh-client amd64 1:8.2p1-4ubuntu0.2 [671 kB]
Get:32 http://archive.ubuntu.com/ubuntu focal/main amd64 publicsuffix all 20200303.0012-1 [111 kB]
Get:33 http://archive.ubuntu.com/ubuntu focal/main amd64 xauth amd64 1:1.1-0ubuntu1 [25.0 kB]
Get:34 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libbrotli1 amd64 1.0.7-6ubuntu0.1 [267 kB]
Get:35 http://archive.ubuntu.com/ubuntu focal/main amd64 libroken18-heimdal amd64 7.7.0+dfsg-1ubuntu1 [41.8 kB]
Get:36 http://archive.ubuntu.com/ubuntu focal/main amd64 libasn1-8-heimdal amd64 7.7.0+dfsg-1ubuntu1 [181 kB]
Get:37 http://archive.ubuntu.com/ubuntu focal/main amd64 libheimbase1-heimdal amd64 7.7.0+dfsg-1ubuntu1 [29.7 kB]
Get:38 http://archive.ubuntu.com/ubuntu focal/main amd64 libhcrypto4-heimdal amd64 7.7.0+dfsg-1ubuntu1 [87.9 kB]
Get:39 http://archive.ubuntu.com/ubuntu focal/main amd64 libwind0-heimdal amd64 7.7.0+dfsg-1ubuntu1 [48.0 kB]
Get:40 http://archive.ubuntu.com/ubuntu focal/main amd64 libhx509-5-heimdal amd64 7.7.0+dfsg-1ubuntu1 [107 kB]
Get:41 http://archive.ubuntu.com/ubuntu focal/main amd64 libkrb5-26-heimdal amd64 7.7.0+dfsg-1ubuntu1 [208 kB]
Get:42 http://archive.ubuntu.com/ubuntu focal/main amd64 libheimntlm0-heimdal amd64 7.7.0+dfsg-1ubuntu1 [15.1 kB]
Get:43 http://archive.ubuntu.com/ubuntu focal/main amd64 libgssapi3-heimdal amd64 7.7.0+dfsg-1ubuntu1 [96.1 kB]
Get:44 http://archive.ubuntu.com/ubuntu focal/main amd64 libsasl2-modules-db amd64 2.1.27+dfsg-2 [14.9 kB]
Get:45 http://archive.ubuntu.com/ubuntu focal/main amd64 libsasl2-2 amd64 2.1.27+dfsg-2 [49.3 kB]
Get:46 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libldap-common all 2.4.49+dfsg-2ubuntu1.8 [16.6 kB]
Get:47 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libldap-2.4-2 amd64 2.4.49+dfsg-2ubuntu1.8 [155 kB]
Get:48 http://archive.ubuntu.com/ubuntu focal/main amd64 libnghttp2-14 amd64 1.40.0-1build1 [78.7 kB]
Get:49 http://archive.ubuntu.com/ubuntu focal/main amd64 librtmp1 amd64 2.4+20151223.gitfa8646d.1-2build1 [54.9 kB]
Get:50 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libssh-4 amd64 0.9.3-2ubuntu2.1 [170 kB]
Get:51 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libcurl3-gnutls amd64 7.68.0-1ubuntu2.5 [232 kB]
Get:52 http://archive.ubuntu.com/ubuntu focal/main amd64 liberror-perl all 0.17029-1 [26.5 kB]
Get:53 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 git-man all 1:2.25.1-1ubuntu3.1 [884 kB]
Get:54 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 git amd64 1:2.25.1-1ubuntu3.1 [4557 kB]
Get:55 http://archive.ubuntu.com/ubuntu focal/main amd64 libsasl2-modules amd64 2.1.27+dfsg-2 [49.1 kB]
Get:56 http://archive.ubuntu.com/ubuntu focal/main amd64 patch amd64 2.7.6-6 [105 kB]
Fetched 19.7 MB in 11s (1875 kB/s)
debconf: delaying package configuration, since apt-utils is not installed
Selecting previously unselected package perl-modules-5.30.
(Reading database ... 4127 files and directories currently installed.)
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Unpacking perl-modules-5.30 (5.30.0-9ubuntu0.2) ...
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root@75cafc0d6fee:/# apt install -y apache2
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  apache2-bin apache2-data apache2-utils file libapr1 libaprutil1 libaprutil1-dbd-sqlite3 libaprutil1-ldap libcurl4 libicu66 libjansson4 liblua5.2-0 libmagic-mgc
  libmagic1 libxml2 mime-support ssl-cert tzdata xz-utils
Suggested packages:
  apache2-doc apache2-suexec-pristine | apache2-suexec-custom www-browser ufw openssl-blacklist
The following NEW packages will be installed:
  apache2 apache2-bin apache2-data apache2-utils file libapr1 libaprutil1 libaprutil1-dbd-sqlite3 libaprutil1-ldap libcurl4 libicu66 libjansson4 liblua5.2-0
  libmagic-mgc libmagic1 libxml2 mime-support ssl-cert tzdata xz-utils
0 upgraded, 20 newly installed, 0 to remove and 2 not upgraded.
Need to get 12.0 MB of archives.
After this operation, 55.0 MB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal/main amd64 libapr1 amd64 1.6.5-1ubuntu1 [91.4 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal/main amd64 libaprutil1 amd64 1.6.1-4ubuntu2 [84.7 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal/main amd64 libaprutil1-dbd-sqlite3 amd64 1.6.1-4ubuntu2 [10.5 kB]
Get:4 http://archive.ubuntu.com/ubuntu focal/main amd64 libaprutil1-ldap amd64 1.6.1-4ubuntu2 [8736 B]
Get:5 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libcurl4 amd64 7.68.0-1ubuntu2.5 [234 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal/main amd64 libjansson4 amd64 2.12-1build1 [28.9 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal/main amd64 liblua5.2-0 amd64 5.2.4-1.1build3 [106 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 tzdata all 2021a-0ubuntu0.20.04 [295 kB]
Get:9 http://archive.ubuntu.com/ubuntu focal/main amd64 libicu66 amd64 66.1-2ubuntu2 [8520 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libxml2 amd64 2.9.10+dfsg-5ubuntu0.20.04.1 [640 kB]
Get:11 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 apache2-bin amd64 2.4.41-4ubuntu3.4 [1180 kB]
Get:12 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 apache2-data all 2.4.41-4ubuntu3.4 [159 kB]
Get:13 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 apache2-utils amd64 2.4.41-4ubuntu3.4 [84.0 kB]
Get:14 http://archive.ubuntu.com/ubuntu focal/main amd64 mime-support all 3.64ubuntu1 [30.6 kB]
Get:15 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 apache2 amd64 2.4.41-4ubuntu3.4 [95.5 kB]
Get:16 http://archive.ubuntu.com/ubuntu focal/main amd64 libmagic-mgc amd64 1:5.38-4 [218 kB]
Get:17 http://archive.ubuntu.com/ubuntu focal/main amd64 libmagic1 amd64 1:5.38-4 [75.9 kB]
Get:18 http://archive.ubuntu.com/ubuntu focal/main amd64 file amd64 1:5.38-4 [23.3 kB]
Get:19 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 xz-utils amd64 5.2.4-1ubuntu1 [82.5 kB]
Get:20 http://archive.ubuntu.com/ubuntu focal/main amd64 ssl-cert all 1.0.39 [17.0 kB]
Fetched 12.0 MB in 6s (1873 kB/s)
debconf: delaying package configuration, since apt-utils is not installed
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(Reading database ... 7949 files and directories currently installed.)
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Setting up libmagic1:amd64 (1:5.38-4) ...
Setting up libapr1:amd64 (1.6.5-1ubuntu1) ...
Setting up file (1:5.38-4) ...
Setting up libjansson4:amd64 (2.12-1build1) ...
Setting up tzdata (2021a-0ubuntu0.20.04) ...
debconf: unable to initialize frontend: Dialog
debconf: (No usable dialog-like program is installed, so the dialog based frontend cannot be used. at /usr/share/perl5/Debconf/FrontEnd/Dialog.pm line 76.)
debconf: falling back to frontend: Readline
Configuring tzdata
------------------

Please select the geographic area in which you live. Subsequent configuration questions will narrow this down by presenting a list of cities, representing the time
zones in which they are located.

  1. Africa  2. America  3. Antarctica  4. Australia  5. Arctic  6. Asia  7. Atlantic  8. Europe  9. Indian  10. Pacific  11. SystemV  12. US  13. Etc
Geographic area: 9

Please select the city or region corresponding to your time zone.

  1. Antananarivo  2. Chagos  3. Christmas  4. Cocos  5. Comoro  6. Kerguelen  7. Mahe  8. Maldives  9. Mauritius  10. Mayotte  11. Reunion
Time zone: 11


Current default time zone: 'Indian/Reunion'
Local time is now:      Wed Jul 21 10:28:52 +04 2021.
Universal Time is now:  Wed Jul 21 06:28:52 UTC 2021.
Run 'dpkg-reconfigure tzdata' if you wish to change it.

Setting up ssl-cert (1.0.39) ...
debconf: unable to initialize frontend: Dialog
debconf: (No usable dialog-like program is installed, so the dialog based frontend cannot be used. at /usr/share/perl5/Debconf/FrontEnd/Dialog.pm line 76.)
debconf: falling back to frontend: Readline
Setting up xz-utils (5.2.4-1ubuntu1) ...
update-alternatives: using /usr/bin/xz to provide /usr/bin/lzma (lzma) in auto mode
update-alternatives: warning: skip creation of /usr/share/man/man1/lzma.1.gz because associated file /usr/share/man/man1/xz.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/unlzma.1.gz because associated file /usr/share/man/man1/unxz.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzcat.1.gz because associated file /usr/share/man/man1/xzcat.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzmore.1.gz because associated file /usr/share/man/man1/xzmore.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzless.1.gz because associated file /usr/share/man/man1/xzless.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzdiff.1.gz because associated file /usr/share/man/man1/xzdiff.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzcmp.1.gz because associated file /usr/share/man/man1/xzcmp.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzgrep.1.gz because associated file /usr/share/man/man1/xzgrep.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzegrep.1.gz because associated file /usr/share/man/man1/xzegrep.1.gz (of link group lzma) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/lzfgrep.1.gz because associated file /usr/share/man/man1/xzfgrep.1.gz (of link group lzma) doesn't exist
Setting up liblua5.2-0:amd64 (5.2.4-1.1build3) ...
Setting up libcurl4:amd64 (7.68.0-1ubuntu2.5) ...
Setting up apache2-data (2.4.41-4ubuntu3.4) ...
Setting up libaprutil1:amd64 (1.6.1-4ubuntu2) ...
Setting up libicu66:amd64 (66.1-2ubuntu2) ...
Setting up libaprutil1-ldap:amd64 (1.6.1-4ubuntu2) ...
Setting up libaprutil1-dbd-sqlite3:amd64 (1.6.1-4ubuntu2) ...
Setting up libxml2:amd64 (2.9.10+dfsg-5ubuntu0.20.04.1) ...
Setting up apache2-utils (2.4.41-4ubuntu3.4) ...
Setting up apache2-bin (2.4.41-4ubuntu3.4) ...
Setting up apache2 (2.4.41-4ubuntu3.4) ...
Enabling module mpm_event.
Enabling module authz_core.
Enabling module authz_host.
Enabling module authn_core.
Enabling module auth_basic.
Enabling module access_compat.
Enabling module authn_file.
Enabling module authz_user.
Enabling module alias.
Enabling module dir.
Enabling module autoindex.
Enabling module env.
Enabling module mime.
Enabling module negotiation.
Enabling module setenvif.
Enabling module filter.
Enabling module deflate.
Enabling module status.
Enabling module reqtimeout.
Enabling conf charset.
Enabling conf localized-error-pages.
Enabling conf other-vhosts-access-log.
Enabling conf security.
Enabling conf serve-cgi-bin.
Enabling site 000-default.
invoke-rc.d: could not determine current runlevel
invoke-rc.d: policy-rc.d denied execution of start.
Processing triggers for libc-bin (2.31-0ubuntu9.2) ...
root@75cafc0d6fee:/# ls
bin  boot  dev  etc  home  lib  lib32  lib64  libx32  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
root@75cafc0d6fee:/# read escape sequence
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                         PORTS                                   NAMES
39c22cc1cbaf   httpd         "httpd-foreground"   18 minutes ago   Up 18 minutes                  0.0.0.0:8080->80/tcp, :::8080->80/tcp   webserver
7bf8088b0a5f   httpd         "httpd-foreground"   27 minutes ago   Up 27 minutes                  0.0.0.0:81->80/tcp, :::81->80/tcp       suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   28 minutes ago   Up 28 minutes                  0.0.0.0:82->80/tcp, :::82->80/tcp       youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   29 minutes ago   Created                                                                suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   36 minutes ago   Up 36 minutes                  0.0.0.0:80->80/tcp, :::80->80/tcp       sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   39 minutes ago   Up 39 minutes                  80/tcp                                  distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             2 hours ago      Exited (0) About an hour ago                                           hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago      Up 41 minutes                                                          dreamy_northcutt
[root@localhost ~]# wget localhost:8080
--2021-07-21 02:29:58--  http://localhost:8080/
Resolving localhost (localhost)... ::1, 127.0.0.1
Connecting to localhost (localhost)|::1|:8080... connected.
HTTP request sent, awaiting response... 200 OK
Length: 45 [text/html]
Saving to: ‘index.html’

100%[==============================================================================================================================>] 45          --.-K/s   in 0s

2021-07-21 02:29:58 (7.63 MB/s) - ‘index.html’ saved [45/45]

[root@localhost ~]# docker run -d -p 8080:80 --name webserver ubuntu
docker: Error response from daemon: Conflict. The container name "/webserver" is already in use by container "39c22cc1cbaf645f9364efc3f0a8120b39f8c12b8338b777b4aa1db7f9656826". You have to remove (or rename) that container to be able to reuse that name.
See 'docker run --help'.
[root@localhost ~]# docker run -d -p 8080:80 --name appserver ubuntu
7a55498157614bd1fc289e32981a371cc9b6d0010c09725939a0862b22ed48c5
docker: Error response from daemon: driver failed programming external connectivity on endpoint appserver (c4a440ed7f996df5d57a1240f0ba796cc63f1ce82bad8ca0522b30e728e93641): Bind for 0.0.0.0:8080 failed: port is already allocated.
[root@localhost ~]# docker run -d -p 8081:80 --name appserver ubuntu
docker: Error response from daemon: Conflict. The container name "/appserver" is already in use by container "7a55498157614bd1fc289e32981a371cc9b6d0010c09725939a0862b22ed48c5". You have to remove (or rename) that container to be able to reuse that name.
See 'docker run --help'.
[root@localhost ~]# docker run -d -p 8081:80 --name server ubuntu
7320dd9b3370b4b5079ed94ed677ca6a14349ff1a5ca02aa8e9ab20ef7432326
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED          STATUS                         PORTS                                   NAMES
7320dd9b3370   ubuntu        "bash"               7 seconds ago    Exited (0) 6 seconds ago                                               server
7a5549815761   ubuntu        "bash"               33 seconds ago   Created                                                                appserver
39c22cc1cbaf   httpd         "httpd-foreground"   20 minutes ago   Up 20 minutes                  0.0.0.0:8080->80/tcp, :::8080->80/tcp   webserver
7bf8088b0a5f   httpd         "httpd-foreground"   29 minutes ago   Up 29 minutes                  0.0.0.0:81->80/tcp, :::81->80/tcp       suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   30 minutes ago   Up 30 minutes                  0.0.0.0:82->80/tcp, :::82->80/tcp       youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   31 minutes ago   Created                                                                suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   38 minutes ago   Up 38 minutes                  0.0.0.0:80->80/tcp, :::80->80/tcp       sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   41 minutes ago   Up 41 minutes                  80/tcp                                  distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             2 hours ago      Exited (0) About an hour ago                                           hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               3 hours ago      Up 43 minutes                                                          dreamy_northcutt
[root@localhost ~]# docker attach 75cafc0d6fee
root@75cafc0d6fee:/# ls
bin  boot  dev  etc  home  lib  lib32  lib64  libx32  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
root@75cafc0d6fee:/#

How to create a image using Dockerfile

How to share an docker image using hub.docker.com?

Removing intermediate container dde6276f8b36
 ---> d03a3fcb6ab8
Step 14/34 : ENV TINI_VERSION 0.14.0
 ---> Running in c7a68caa1d47
Removing intermediate container c7a68caa1d47
 ---> b61ea158ad5f
Step 15/34 : ENV TINI_SHA 6c41ec7d33e857d4779f14d9c74924cab0c7973485d2972419a3b7c7620ff5fd
 ---> Running in 8f651e9e226c
Removing intermediate container 8f651e9e226c
 ---> f07bb2384643
Step 16/34 : RUN curl -fsSL https://github.com/krallin/tini/releases/download/v${TINI_VERSION}/tini-static-amd64 -o /bin/tini && chmod +x /bin/tini   && echo "$TINI_SHA  /bin/tini" | sha256sum -c -
 ---> Running in 56a31ebfbc8b
/bin/tini: OK
Removing intermediate container 56a31ebfbc8b
 ---> c90cbb6ca76e
Step 17/34 : COPY init.groovy /usr/share/jenkins/ref/init.groovy.d/tcp-slave-agent-port.groovy
COPY failed: file not found in build context or excluded by .dockerignore: stat init.groovy: file does not exist
[root@localhost suresh]#
[root@localhost suresh]# vi dockerfile
[root@localhost suresh]# FROM ubuntu
bash: FROM: command not found...
[root@localhost suresh]# MAINTAINER Rajesh Kumar 
bash: rajesh@devopsschool.com?: No such file or directory
[root@localhost suresh]# RUN apt-get update
bash: RUN: command not found...
[root@localhost suresh]# RUN apt-get install git -y
bash: RUN: command not found...
[root@localhost suresh]# COPY index.html /opt^C
[root@localhost suresh]# ^C
[root@localhost suresh]# ^C
[root@localhost suresh]# ^C
[root@localhost suresh]# ^C
[root@localhost suresh]# clear
[root@localhost suresh]# touch index.html
[root@localhost suresh]# docker build -t install-git .
Sending build context to Docker daemon   2.56kB
Step 1/5 : FROM ubuntu
 ---> c29284518f49
Step 2/5 : MAINTAINER Rajesh Kumar  Running in b1b6c694d88e
Removing intermediate container b1b6c694d88e
 ---> 629e1f351472
Step 3/5 : RUN apt-get update
 ---> Running in 57e88f6b7c02
Get:1 http://archive.ubuntu.com/ubuntu focal InRelease [265 kB]
Get:2 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages [1275 kB]
Get:6 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages [986 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages [11.3 MB]
Get:8 http://archive.ubuntu.com/ubuntu focal/restricted amd64 Packages [33.4 kB]
Get:9 http://archive.ubuntu.com/ubuntu focal/multiverse amd64 Packages [177 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages [1417 kB]
Get:11 http://security.ubuntu.com/ubuntu focal-security/restricted amd64 Packages [428 kB]
Get:12 http://archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 Packages [37.3 kB]
Get:13 http://archive.ubuntu.com/ubuntu focal-updates/restricted amd64 Packages [474 kB]
Get:14 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages [1055 kB]
Get:15 http://archive.ubuntu.com/ubuntu focal-backports/main amd64 Packages [2668 B]
Get:16 http://archive.ubuntu.com/ubuntu focal-backports/universe amd64 Packages [6303 B]
Get:17 http://security.ubuntu.com/ubuntu focal-security/universe amd64 Packages [784 kB]
Get:18 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 Packages [34.7 kB]
Fetched 18.6 MB in 5s (4013 kB/s)
Reading package lists...
Removing intermediate container 57e88f6b7c02
 ---> 4ad084e71cbd
Step 4/5 : RUN apt-get install git -y
 ---> Running in b85f3d12a43b
Reading package lists...
Building dependency tree...
Reading state information...
The following additional packages will be installed:
  ca-certificates git-man krb5-locales less libasn1-8-heimdal libbrotli1
  libbsd0 libcbor0.6 libcurl3-gnutls libedit2 liberror-perl libexpat1
  libfido2-1 libgdbm-compat4 libgdbm6 libgssapi-krb5-2 libgssapi3-heimdal
  libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal
  libhx509-5-heimdal libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3
  libkrb5support0 libldap-2.4-2 libldap-common libnghttp2-14 libperl5.30
  libpsl5 libroken18-heimdal librtmp1 libsasl2-2 libsasl2-modules
  libsasl2-modules-db libsqlite3-0 libssh-4 libssl1.1 libwind0-heimdal
  libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 netbase
  openssh-client openssl patch perl perl-modules-5.30 publicsuffix xauth
Suggested packages:
  gettext-base git-daemon-run | git-daemon-sysvinit git-doc git-el git-email
  git-gui gitk gitweb git-cvs git-mediawiki git-svn gdbm-l10n krb5-doc
  krb5-user libsasl2-modules-gssapi-mit | libsasl2-modules-gssapi-heimdal
  libsasl2-modules-ldap libsasl2-modules-otp libsasl2-modules-sql keychain
  libpam-ssh monkeysphere ssh-askpass ed diffutils-doc perl-doc
  libterm-readline-gnu-perl | libterm-readline-perl-perl make libb-debug-perl
  liblocale-codes-perl
The following NEW packages will be installed:
  ca-certificates git git-man krb5-locales less libasn1-8-heimdal libbrotli1
  libbsd0 libcbor0.6 libcurl3-gnutls libedit2 liberror-perl libexpat1
  libfido2-1 libgdbm-compat4 libgdbm6 libgssapi-krb5-2 libgssapi3-heimdal
  libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal
  libhx509-5-heimdal libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3
  libkrb5support0 libldap-2.4-2 libldap-common libnghttp2-14 libperl5.30
  libpsl5 libroken18-heimdal librtmp1 libsasl2-2 libsasl2-modules
  libsasl2-modules-db libsqlite3-0 libssh-4 libssl1.1 libwind0-heimdal
  libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 netbase
  openssh-client openssl patch perl perl-modules-5.30 publicsuffix xauth
0 upgraded, 56 newly installed, 0 to remove and 2 not upgraded.
Need to get 19.7 MB of archives.
After this operation, 110 MB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 perl-modules-5.30 all 5.30.0-9ubuntu0.2 [2738 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal/main amd64 libgdbm6 amd64 1.18.1-5 [27.4 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal/main amd64 libgdbm-compat4 amd64 1.18.1-5 [6244 B]
Get:4 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libperl5.30 amd64 5.30.0-9ubuntu0.2 [3952 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 perl amd64 5.30.0-9ubuntu0.2 [224 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libssl1.1 amd64 1.1.1f-1ubuntu2.4 [1319 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 openssl amd64 1.1.1f-1ubuntu2.4 [620 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 ca-certificates all 20210119~20.04.1 [146 kB]
Get:9 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 less amd64 551-1ubuntu0.1 [123 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal/main amd64 libbsd0 amd64 0.10.0-1 [45.4 kB]
Get:11 http://archive.ubuntu.com/ubuntu focal/main amd64 libexpat1 amd64 2.2.9-1build1 [73.3 kB]
Get:12 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libsqlite3-0 amd64 3.31.1-4ubuntu0.2 [549 kB]
Get:13 http://archive.ubuntu.com/ubuntu focal/main amd64 netbase all 6.1 [13.1 kB]
Get:14 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 krb5-locales all 1.17-6ubuntu4.1 [11.4 kB]
Get:15 http://archive.ubuntu.com/ubuntu focal/main amd64 libcbor0.6 amd64 0.6.0-0ubuntu1 [21.1 kB]
Get:16 http://archive.ubuntu.com/ubuntu focal/main amd64 libedit2 amd64 3.1-20191231-1 [87.0 kB]
Get:17 http://archive.ubuntu.com/ubuntu focal/main amd64 libfido2-1 amd64 1.3.1-1ubuntu2 [47.9 kB]
Get:18 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libkrb5support0 amd64 1.17-6ubuntu4.1 [30.9 kB]
Get:19 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libk5crypto3 amd64 1.17-6ubuntu4.1 [79.9 kB]
Get:20 http://archive.ubuntu.com/ubuntu focal/main amd64 libkeyutils1 amd64 1.6-6ubuntu1 [10.2 kB]
Get:21 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libkrb5-3 amd64 1.17-6ubuntu4.1 [330 kB]
Get:22 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libgssapi-krb5-2 amd64 1.17-6ubuntu4.1 [121 kB]
Get:23 http://archive.ubuntu.com/ubuntu focal/main amd64 libpsl5 amd64 0.21.0-1ubuntu1 [51.5 kB]
Get:24 http://archive.ubuntu.com/ubuntu focal/main amd64 libxau6 amd64 1:1.0.9-0ubuntu1 [7488 B]
Get:25 http://archive.ubuntu.com/ubuntu focal/main amd64 libxdmcp6 amd64 1:1.1.3-0ubuntu1 [10.6 kB]
Get:26 http://archive.ubuntu.com/ubuntu focal/main amd64 libxcb1 amd64 1.14-2 [44.7 kB]
Get:27 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libx11-data all 2:1.6.9-2ubuntu1.2 [113 kB]
Get:28 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libx11-6 amd64 2:1.6.9-2ubuntu1.2 [575 kB]
Get:29 http://archive.ubuntu.com/ubuntu focal/main amd64 libxext6 amd64 2:1.3.4-0ubuntu1 [29.1 kB]
Get:30 http://archive.ubuntu.com/ubuntu focal/main amd64 libxmuu1 amd64 2:1.1.3-0ubuntu1 [9728 B]
Get:31 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 openssh-client amd64 1:8.2p1-4ubuntu0.2 [671 kB]
Get:32 http://archive.ubuntu.com/ubuntu focal/main amd64 publicsuffix all 20200303.0012-1 [111 kB]
Get:33 http://archive.ubuntu.com/ubuntu focal/main amd64 xauth amd64 1:1.1-0ubuntu1 [25.0 kB]
Get:34 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libbrotli1 amd64 1.0.7-6ubuntu0.1 [267 kB]
Get:35 http://archive.ubuntu.com/ubuntu focal/main amd64 libroken18-heimdal amd64 7.7.0+dfsg-1ubuntu1 [41.8 kB]
Get:36 http://archive.ubuntu.com/ubuntu focal/main amd64 libasn1-8-heimdal amd64 7.7.0+dfsg-1ubuntu1 [181 kB]
Get:37 http://archive.ubuntu.com/ubuntu focal/main amd64 libheimbase1-heimdal amd64 7.7.0+dfsg-1ubuntu1 [29.7 kB]
Get:38 http://archive.ubuntu.com/ubuntu focal/main amd64 libhcrypto4-heimdal amd64 7.7.0+dfsg-1ubuntu1 [87.9 kB]
Get:39 http://archive.ubuntu.com/ubuntu focal/main amd64 libwind0-heimdal amd64 7.7.0+dfsg-1ubuntu1 [48.0 kB]
Get:40 http://archive.ubuntu.com/ubuntu focal/main amd64 libhx509-5-heimdal amd64 7.7.0+dfsg-1ubuntu1 [107 kB]
Get:41 http://archive.ubuntu.com/ubuntu focal/main amd64 libkrb5-26-heimdal amd64 7.7.0+dfsg-1ubuntu1 [208 kB]
Get:42 http://archive.ubuntu.com/ubuntu focal/main amd64 libheimntlm0-heimdal amd64 7.7.0+dfsg-1ubuntu1 [15.1 kB]
Get:43 http://archive.ubuntu.com/ubuntu focal/main amd64 libgssapi3-heimdal amd64 7.7.0+dfsg-1ubuntu1 [96.1 kB]
Get:44 http://archive.ubuntu.com/ubuntu focal/main amd64 libsasl2-modules-db amd64 2.1.27+dfsg-2 [14.9 kB]
Get:45 http://archive.ubuntu.com/ubuntu focal/main amd64 libsasl2-2 amd64 2.1.27+dfsg-2 [49.3 kB]
Get:46 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libldap-common all 2.4.49+dfsg-2ubuntu1.8 [16.6 kB]
Get:47 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libldap-2.4-2 amd64 2.4.49+dfsg-2ubuntu1.8 [155 kB]
Get:48 http://archive.ubuntu.com/ubuntu focal/main amd64 libnghttp2-14 amd64 1.40.0-1build1 [78.7 kB]
Get:49 http://archive.ubuntu.com/ubuntu focal/main amd64 librtmp1 amd64 2.4+20151223.gitfa8646d.1-2build1 [54.9 kB]
Get:50 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libssh-4 amd64 0.9.3-2ubuntu2.1 [170 kB]
Get:51 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libcurl3-gnutls amd64 7.68.0-1ubuntu2.5 [232 kB]
Get:52 http://archive.ubuntu.com/ubuntu focal/main amd64 liberror-perl all 0.17029-1 [26.5 kB]
Get:53 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 git-man all 1:2.25.1-1ubuntu3.1 [884 kB]
Get:54 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 git amd64 1:2.25.1-1ubuntu3.1 [4557 kB]
Get:55 http://archive.ubuntu.com/ubuntu focal/main amd64 libsasl2-modules amd64 2.1.27+dfsg-2 [49.1 kB]
Get:56 http://archive.ubuntu.com/ubuntu focal/main amd64 patch amd64 2.7.6-6 [105 kB]
debconf: delaying package configuration, since apt-utils is not installed
Fetched 19.7 MB in 6s (3197 kB/s)
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Unpacking libkeyutils1:amd64 (1.6-6ubuntu1) ...
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Setting up libkeyutils1:amd64 (1.6-6ubuntu1) ...
Setting up libpsl5:amd64 (0.21.0-1ubuntu1) ...
Setting up perl-modules-5.30 (5.30.0-9ubuntu0.2) ...
Setting up libssl1.1:amd64 (1.1.1f-1ubuntu2.4) ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
Setting up libbrotli1:amd64 (1.0.7-6ubuntu0.1) ...
Setting up libsqlite3-0:amd64 (3.31.1-4ubuntu0.2) ...
Setting up libsasl2-modules:amd64 (2.1.27+dfsg-2) ...
Setting up libnghttp2-14:amd64 (1.40.0-1build1) ...
Setting up less (551-1ubuntu0.1) ...
Setting up krb5-locales (1.17-6ubuntu4.1) ...
Setting up libcbor0.6:amd64 (0.6.0-0ubuntu1) ...
Setting up libldap-common (2.4.49+dfsg-2ubuntu1.8) ...
Setting up libkrb5support0:amd64 (1.17-6ubuntu4.1) ...
Setting up libsasl2-modules-db:amd64 (2.1.27+dfsg-2) ...
Setting up libx11-data (2:1.6.9-2ubuntu1.2) ...
Setting up librtmp1:amd64 (2.4+20151223.gitfa8646d.1-2build1) ...
Setting up patch (2.7.6-6) ...
Setting up libk5crypto3:amd64 (1.17-6ubuntu4.1) ...
Setting up libsasl2-2:amd64 (2.1.27+dfsg-2) ...
Setting up libroken18-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up git-man (1:2.25.1-1ubuntu3.1) ...
Setting up netbase (6.1) ...
Setting up libkrb5-3:amd64 (1.17-6ubuntu4.1) ...
Setting up libfido2-1:amd64 (1.3.1-1ubuntu2) ...
Setting up openssl (1.1.1f-1ubuntu2.4) ...
Setting up libbsd0:amd64 (0.10.0-1) ...
Setting up publicsuffix (20200303.0012-1) ...
Setting up libheimbase1-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up libgdbm6:amd64 (1.18.1-5) ...
Setting up libxdmcp6:amd64 (1:1.1.3-0ubuntu1) ...
Setting up libxcb1:amd64 (1.14-2) ...
Setting up libasn1-8-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up libedit2:amd64 (3.1-20191231-1) ...
Setting up libhcrypto4-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up ca-certificates (20210119~20.04.1) ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
Updating certificates in /etc/ssl/certs...
129 added, 0 removed; done.
Setting up libwind0-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up libgssapi-krb5-2:amd64 (1.17-6ubuntu4.1) ...
Setting up libgdbm-compat4:amd64 (1.18.1-5) ...
Setting up libssh-4:amd64 (0.9.3-2ubuntu2.1) ...
Setting up libperl5.30:amd64 (5.30.0-9ubuntu0.2) ...
Setting up libx11-6:amd64 (2:1.6.9-2ubuntu1.2) ...
Setting up libxmuu1:amd64 (2:1.1.3-0ubuntu1) ...
Setting up openssh-client (1:8.2p1-4ubuntu0.2) ...
Setting up libhx509-5-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up libxext6:amd64 (2:1.3.4-0ubuntu1) ...
Setting up perl (5.30.0-9ubuntu0.2) ...
Setting up xauth (1:1.1-0ubuntu1) ...
Setting up libkrb5-26-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up libheimntlm0-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up liberror-perl (0.17029-1) ...
Setting up libgssapi3-heimdal:amd64 (7.7.0+dfsg-1ubuntu1) ...
Setting up libldap-2.4-2:amd64 (2.4.49+dfsg-2ubuntu1.8) ...
Setting up libcurl3-gnutls:amd64 (7.68.0-1ubuntu2.5) ...
Setting up git (1:2.25.1-1ubuntu3.1) ...
Processing triggers for libc-bin (2.31-0ubuntu9.2) ...
Processing triggers for ca-certificates (20210119~20.04.1) ...
Updating certificates in /etc/ssl/certs...
0 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...
done.
Removing intermediate container b85f3d12a43b
 ---> d1f91c3bb4bb
Step 5/5 : COPY index.html /opt
 ---> c47535b6da51
Successfully built c47535b6da51
Successfully tagged install-git:latest
[root@localhost suresh]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
install-git   latest    c47535b6da51   8 seconds ago   204MB
            c90cbb6ca76e   4 hours ago     515MB
ubuntu        latest    c29284518f49   7 days ago      72.8MB
httpd         latest    bd29370f84ea   12 days ago     138MB
openjdk       8-jdk     d61c96e2d100   3 weeks ago     514MB
hello-world   latest    d1165f221234   4 months ago    13.3kB
[root@localhost suresh]# docker pas -a
unknown shorthand flag: 'a' in -a
See 'docker --help'.

Usage:  docker [OPTIONS] COMMAND

A self-sufficient runtime for containers

Options:
      --config string      Location of client config files (default "/root/.docker")
  -c, --context string     Name of the context to use to connect to the daemon (overrides DOCKER_HOST env var and default context set with "docker context use")
  -D, --debug              Enable debug mode
  -H, --host list          Daemon socket(s) to connect to
  -l, --log-level string   Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info")
      --tls                Use TLS; implied by --tlsverify
      --tlscacert string   Trust certs signed only by this CA (default "/root/.docker/ca.pem")
      --tlscert string     Path to TLS certificate file (default "/root/.docker/cert.pem")
      --tlskey string      Path to TLS key file (default "/root/.docker/key.pem")
      --tlsverify          Use TLS and verify the remote
  -v, --version            Print version information and quit

Management Commands:
  app*        Docker App (Docker Inc., v0.9.1-beta3)
  builder     Manage builds
  buildx*     Build with BuildKit (Docker Inc., v0.5.1-docker)
  config      Manage Docker configs
  container   Manage containers
  context     Manage contexts
  image       Manage images
  manifest    Manage Docker image manifests and manifest lists
  network     Manage networks
  node        Manage Swarm nodes
  plugin      Manage plugins
  scan*       Docker Scan (Docker Inc., v0.8.0)
  secret      Manage Docker secrets
  service     Manage services
  stack       Manage Docker stacks
  swarm       Manage Swarm
  system      Manage Docker
  trust       Manage trust on Docker images
  volume      Manage volumes

Commands:
  attach      Attach local standard input, output, and error streams to a running container
  build       Build an image from a Dockerfile
  commit      Create a new image from a container's changes
  cp          Copy files/folders between a container and the local filesystem
  create      Create a new container
  diff        Inspect changes to files or directories on a container's filesystem
  events      Get real time events from the server
  exec        Run a command in a running container
  export      Export a container's filesystem as a tar archive
  history     Show the history of an image
  images      List images
  import      Import the contents from a tarball to create a filesystem image
  info        Display system-wide information
  inspect     Return low-level information on Docker objects
  kill        Kill one or more running containers
  load        Load an image from a tar archive or STDIN
  login       Log in to a Docker registry
  logout      Log out from a Docker registry
  logs        Fetch the logs of a container
  pause       Pause all processes within one or more containers
  port        List port mappings or a specific mapping for the container
  ps          List containers
  pull        Pull an image or a repository from a registry
  push        Push an image or a repository to a registry
  rename      Rename a container
  restart     Restart one or more containers
  rm          Remove one or more containers
  rmi         Remove one or more images
  run         Run a command in a new container
  save        Save one or more images to a tar archive (streamed to STDOUT by default)
  search      Search the Docker Hub for images
  start       Start one or more stopped containers
  stats       Display a live stream of container(s) resource usage statistics
  stop        Stop one or more running containers
  tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
  top         Display the running processes of a container
  unpause     Unpause all processes within one or more containers
  update      Update configuration of one or more containers
  version     Show the Docker version information
  wait        Block until one or more containers stop, then print their exit codes

Run 'docker COMMAND --help' for more information on a command.

To get more help with docker, check out our guides at https://docs.docker.com/go/guides/

[root@localhost suresh]# docker ps -a
CONTAINER ID   IMAGE         COMMAND              CREATED       STATUS                   PORTS                                       NAMES
6cd3f50d4ed7   ubuntu        "/bin/bash"          5 hours ago   Up 5 hours               0.0.0.0:8083->8083/tcp, :::8083->8083/tcp   priceless_sanderson
d721ee29be3a   ubuntu        "/bin/bash"          5 hours ago   Created                                                              friendly_ellis
7320dd9b3370   ubuntu        "bash"               6 hours ago   Exited (0) 6 hours ago                                               server
7a5549815761   ubuntu        "bash"               6 hours ago   Created                                                              appserver
39c22cc1cbaf   httpd         "httpd-foreground"   6 hours ago   Up 6 hours               0.0.0.0:8080->80/tcp, :::8080->80/tcp       webserver
7bf8088b0a5f   httpd         "httpd-foreground"   6 hours ago   Up 6 hours               0.0.0.0:81->80/tcp, :::81->80/tcp           suspicious_poitras
317020ee19e1   httpd         "httpd-foreground"   6 hours ago   Up 6 hours               0.0.0.0:82->80/tcp, :::82->80/tcp           youthful_babbage
106e7c9b43b8   httpd         "httpd-foreground"   6 hours ago   Created                                                              suspicious_allen
99a9b3f7f56c   httpd         "httpd-foreground"   6 hours ago   Up 6 hours               0.0.0.0:80->80/tcp, :::80->80/tcp           sad_roentgen
e57a2bfc474e   httpd         "httpd-foreground"   6 hours ago   Up 6 hours               80/tcp                                      distracted_torvalds
d4a3a68b47a9   hello-world   "/hello"             7 hours ago   Exited (0) 7 hours ago                                               hungry_satoshi
75cafc0d6fee   ubuntu        "bash"               9 hours ago   Up 6 hours                                                           dreamy_northcutt
[root@localhost suresh]# docket build -t sureshramisetti/docker_repo .
bash: docket: command not found...
[root@localhost suresh]# docker build -t sureshramisetti/docker_repo .
Sending build context to Docker daemon   2.56kB
Step 1/5 : FROM ubuntu
 ---> c29284518f49
Step 2/5 : MAINTAINER Rajesh Kumar <sureshramisetti.br@gmail.com?
 ---> Using cache
 ---> 629e1f351472
Step 3/5 : RUN apt-get update
 ---> Using cache
 ---> 4ad084e71cbd
Step 4/5 : RUN apt-get install git -y
 ---> Using cache
 ---> d1f91c3bb4bb
Step 5/5 : COPY index.html /opt
 ---> Using cache
 ---> c47535b6da51
Successfully built c47535b6da51
Successfully tagged sureshramisetti/docker_repo:latest
[root@localhost suresh]# docker run sureshramisetti/docker_repo
[root@localhost suresh]# docker push sureshramisetti/docker_repo
Using default tag: latest
The push refers to repository [docker.io/sureshramisetti/docker_repo]
a1aab20d2ca6: Preparing
52df2cabd5ec: Preparing
35fd68bb561c: Preparing
a70daca533d0: Preparing
denied: requested access to the resource is denied
[root@localhost suresh]# ^C
[root@localhost suresh]# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: sureshramisetti
Password:
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded
[root@localhost suresh]# docker push sureshramisetti/docker_repo
Using default tag: latest
The push refers to repository [docker.io/sureshramisetti/docker_repo]
a1aab20d2ca6: Pushed
52df2cabd5ec: Pushed
35fd68bb561c: Pushed
a70daca533d0: Mounted from library/ubuntu
latest: digest: sha256:16ea152e7ae341e7f3c5b18f6ceeb140a4415f0dc31648d20929b41fe0e8be04 size: 1160
[root@localhost suresh]# history
    1  ifconfig
    2  sudo yum install -y yum-utils device-mapper-persistent-data lvm2
    3  docker ps -a
    4  sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    5  sudo yum install –y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
    6  sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
    7  sudo yum install -y docker-ce
    8  docker ps -a
    9  docker start 75cafc0d6fee
   10  docker ps -a
   11  docker kill 82da9c001d75
   12  docker start 82da9c001d75
   13  docker kill 82da9c001d75
   14  docker rm 82da9c001d75
   15  docker ps -a
   16  docker start 79e0ca51ae30
   17  docker rm 79e0ca51ae30
   18  docker ps -a
   19  docker pull https
   20  docker pull httpd
   21  docker ps -a
   22  docker run -d httpd
   23  docker ps -a
   24  docker exec -it 75cafc0d6fee /bin/bash
   25  docker ps -a
   26  docker run -d -p 80:80 httpd
   27  docker ps -a
   28  docker attach 75cafc0d6fee
   29  ls
   30  history
   31  docker ps -a
   32   docker run -d -p 80:80 httpd
   33  docker run -d -p 81:80 httpddocker run -d -p 81:80 httpd
   34  docker run -d -p 82:80 httpd
   35  docker run -d -p 81:80
   36  docker run -d -p 81:80 https
   37  docker run -d -p 81:80 httpd
   38  docker ps -a
   39  history
   40  docker ps -a
   41  docker attach 75cafc0d6fee
   42  docker attach 75cafc0d6fee
   43  ls
   44  bash: docker: command not found
   45  docker images|grep httpd
   46  docker ps -a
   47  docker run -d -p 8080:80 --name webserver httpd
   48  docker ps -a
   49  apt update
   50  curl -O https://raw.githubusercontent.com/spinnaker/halyard/master/install/debian/InstallHalyard.sh
   51  docker ps -a
   52  docker attach 75cafc0d6fee
   53  git -version
   54  apt get install apache2
   55  sudo bash InstallHalyard.shdocker run -it ubuntu:latest /bin/bash
   56  apt-get install apache2
   57  apt-get install apache2
   58  apt-get install apache2
   59  docker attach 75cafc0d6fee
   60  docker ps -a
   61  wget localhost:8080
   62  docker run -d -p 8080:80 --name webserver ubuntu
   63  docker run -d -p 8080:80 --name appserver ubuntu
   64  docker run -d -p 8081:80 --name appserver ubuntu
   65  docker run -d -p 8081:80 --name server ubuntu
   66  docker ps -a
   67  docker attach 75cafc0d6fee
   68  git --version
   69  apcahe2 -v
   70  docker ps -a
   71  docker version
   72  docker run -it -p 8080:8080 ubuntu /bin/bash
   73  docker run -it -p 8083:8083 ubuntu /bin/bash
   74  apt-get install openjdk-8-jdk
   75  apt update
   76  sudo apt openjdk-8-jdk
   77  docker run openjdk-8-jdk
   78  dcoker run --help
   79  docker run --help
   80  docker attach 75cafc0d6fee
   81  docker ps -a
   82  sudo vim Dockerfile
   83  FROM ubuntu
   84  MAINTAINER Rajesh Kumar << rajesh@scmgalaxy.com>>
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update
RUN apt-get -y install tzdata
RUN apt-get update && apt-get install git -y && apt-get install -yq apache2

   85  sudo docker build -t workdir-demo
   86  docker build -t workdir-demo
   87  mkdir suresh
   88  cd suresh/
   89  vi dockerfile
   90  vi dockerfile
   91  cat dockerfile
   92  vi dockerfile
   93  touch index.html
   94  docker build -t sureshramisetti/docker_repo .
   95  vi dockerfile
   96  FROM ubuntu
   97  MAINTAINER Rajesh Kumar <rajesh@devopsschool.com?
   98  RUN apt-get update
   99  RUN apt-get install git -y
  100  clear
  101  touch index.html
  102  docker build -t install-git .
  103  docker images
  104  docker pas -a
  105  docker ps -a
  106  docket build -t sureshramisetti/docker_repo .
  107  docker build -t sureshramisetti/docker_repo .
  108  docker run sureshramisetti/docker_repo
  109  docker push sureshramisetti/docker_repo
  110  docker login
  111  docker push sureshramisetti/docker_repo
  112  history
[root@localhost suresh]#

https://hub.docker.com/repositories