Ansible is a configuration management tool where the server(s) (hardware and software)configurations can be automated. It is owned by RedHat and is open source and is written in python. It is easy to use and can run on any machine (linux or windows) ad helps in managing server(s) configuration management Ansible architecture components: 1.User —>Admin 2. ACS —> Ansible control server—> management node 3. ARS —-> Ansible Remote server (Host 1 ,2 ….n) It has 3 main components of ACS:

What is Ansible? Ansible is a cross-platform Configuration Management Tool for Server(s), which is primarily written using python. Benefits of Ansible The benefits are as follows: It is easy to learn, understand and use which makes it the choice for server config management It is Idempotent, that is, there are no additional effect if it is called more than once with the same input parameters. It is Platform Independent. Ansible-Command prompt is free. Architecture of Ansible

what is ansible? It is a Tool which manage configuration of servers. Configuration of servers includes create/delete/modify file, install/uninstall packages, start/restart services etc.. Benefits of Ansible: Its free open source Tool Easy to learn and use platform independent It works for All OS .like windows, Linux Ansible modules are idempotent Architecture of Ansible: Human communicate with ansible remote servers through Ansible control server. The component Of ACS includes Tool, Ansible inventory, and ansible playbook.

Create a namespace with your name and assigne one dummy resourcesquota to it and deploy a app of mysql in your namespace. created the name spacekubectl create ns ajins created a ode in that name spacekubectl create deployment ajidep –image=mysql -n ajins applied the resourseskubectl apply -f rs.yaml –namespace=ajins kubectl get resourcequota mem-cpu-demo –namespace=ajinsNAME AGE REQUEST LIMITmem-cpu-demo 22s requests.cpu: 0/1, requests.memory: 0/1Gi limits.cpu: 0/2, limits.memory: 0/2Gi

Every Kubernetes cluster is provisioned with a special service that provides a way for internal applications to talk to the API server. by the command kubectl get svc, we can see that service listed with the name ‘kubernates‘

1057 kubectl get pod | grep manu1058 clear1059 ls1060 cp pod.yaml pod2.yaml1061 cp pod.yaml pod3.yaml1062 cp pod.yaml pod4.yaml1063 cp pod.yaml pod1.yaml1064 vi pod1.yaml1065 vi pod3.yaml1066 vi pod4.yaml1067 clear1068 kubectl apply -f pod1.yaml1069 kubectl apply -f pod2.yaml1070 vi pod2.yaml1071 kubectl apply -f pod2.yaml1072 vi pod2.yaml1073 kubectl apply -f pod2.yaml1074 vi pod3.yaml1075 kubectl apply -f pod3.yaml1076 vi pod4.yaml1077 kubectl apply -f pod4.yaml1078 kubectl get pod|grep manu1079 kubectl get pod -o wide | grep manu1080 clear1081 kubectl get pod -o wide | grep

A kubernetes service is a group of pods running in a cluster. ClusterIP is a service which is accessible only within the Kubernetes cluster. Hence, it is the internal IP of the components inside a Kubernetes cluster. NodePort is an open port for every node in the cluster. This is accessible from outside the cluster. LoadBalancer distributes the external request among the workers of the cluster. Following commands are used to create 4 PODS using four Manifest files (pod1.yaml, pod2.yaml,

Analysis: kubectl describe svc kubernetes ‘kubernetes’ is a clusterIP service. (ie can be accessed only inside the cluster.) It has no selector specified.( So no automatic LB.) But endpoints specified(maybe hardcoded) as 172.31.15.134:6443 ( that means all the requests to this service will be routed to 172.31.15.134:6443) Now you can see the its the IP and port corresponding to APIServer pod. Conclusion: So kubernetes service act as a service for APIServer Pod. Other pods inside the cluster like Scheduler, Controller

What is DevOps? DevOps is the combination of individuals, process and technology to provide value to customers continuously. DevOps enables formerly siloed roles—development, IT operations, quality engineering and security— to collaborate to provide better as well as more reliable products. By adopting a DevOps culture together with DevOps practices and tools, teams gain the flexibility to higher reply to customer requirements, increase confidence within the applications they build, as a result growth becomes speedy which leads to achieve business goals

Pods are the atomic unit of kubernetes. Pod  is a group of one or more containers. Pods can only be instantiated not created. Pods can be created using yaml or json. Pod has multiple states. Running, Pending and succeeded/failed Each pod connects to common pod network Pods can only be instantiated not created Service serves as an internal load balancer for pod Each pod has an ip and port If more than one container are available in a pod. Each container

It is an atomic scheduling unit in a Kubernetes cluster. It is a logical unit. Every container running in the cluster nodes will be wrapped up by the POD. In one POD there can be multiple container running. It is called tight coupling. Prefered way is run one container in one POD. It is called loose coupling. Each POD will have its own IP address. There will be POD nw connecting all the PODS in a cluster irrespective of the

A pod is the smallest working unit in Kubernetes.A pod will have one or more containers (when there are multiple containers, they share the resources on the pods) Kubernetes runs the containers through pods only.When scaling is required, the pod is replicated.Pods are ephemeral and disposable – they cannot be reinstantiated after the lifecycle, a similar pod can be instantiated.

Below are the Features of pods Pods are the atomic unit of kubernetes. Pods run on worker node. Pods can contain one or more container. Pods doesn’t exist without a container. All pods in a cluster are connected to a pod network. Pods are temporary [once removed will be removed for ever]. A pod pass through these phases : Ready,Pending,succeeded,Failed. Services running in pods are accessed using pod IP. All pods can communicate with each other on all nodes. All

Write down 10 features of Kubernetes with image Reduce the complexity of container Container orchestration Scheduling user requests Scaling containers Load balancing the containers Rollback containers Self-healing Monitoring Add-ons  like ingress, dns Ability to absorb changes quickly What are the components of Kubernetes master and explain each component’s function? There are 4 major components in kubernetes master. 1. API server -> Collect or get the user input and act as a front end to control plane 2. Controller -> responsible

kubelet :An agent that runs on each node in the cluster. It makes sure that containers are running in a Pod. kube-proxy :kube-proxy maintains network rules on nodes. Manage communication within the cluster and outside the cluster. Also assign ip address for pods Container runtime: For managing and run the containers.

Pods are the smallest deployable units of computing that you can create and manage in Kubernetes. A Pod (as in a pod of whales or pea pod) is a group of one or more containers. A pod with multiple container is not a good practice Pods can be created using yaml or json Pod has multiple states. Running, Pending and succeeded/failed Each pod connects to common pod network Each pod is an application Pods can only be instantiated not created Service