https://www.devopsschool.com/blog/kubernetes-1-23-6-cluster-setup-master-and-worker-in-ubuntu-20-04/
Master - 54.160.98.129
Worker - 54.227.222.224
kubeadm join 172.31.63.230:6443 --token ggh70j.dm3im2mwg0ajeku9 --discovery-token-ca-cert-hash sha256:b3a3d73921ee264dc989c968a9a38057503d7c69ad2546b65ea7d21f1777eccf
1 clear
2 ls
3 cd
4 ls
5 git clone https://github.com/certifications-tutorials/cks-course-environment/
6 clearls
7 clear
8 ls
9 cd cks-course-environment/
10 ls
11 cd cluster-setup
12 ls
13 cd latest
14 clear
15 ls
16 pwd
17 ls
18 clear
19 ls
20 chmod 755 install_master.sh
21 ls
22 ./install_master.sh
23 clear
24 ls
25 kubectk
26 kubectl
27 clear
28 kubectl get nodes
29 kubectl
30 kubectl cluster-info
31 clear
32 kubectl get nodes
33 cd
34 kubectl get nodes
35 kubectl get pods --all-namespaces
36 histpry
37 history
How Workstation connect to API server?
kubectl
read a file
$HOME/.kube/config
Cluster
uSer
Context
What to do?
===========================================
1- All the api resources
2. What is the use of each res
3. How to deploy??
=======================================================
CRUD
Create
CMD
create
YAML
create -f yaml
Read
CMD
get
describe
YAML
get -f yaml
describe -f yaml
Update
CMD
edit
YAML
apply -f yaml
Delete
CMD
delete
YAML
delete -f yaml
======================================================
Namespace
38 clear
39 ls
40 more $HOME/.kube/config
41 clear
42 kubectl config view
43 clear
44 kubectl
45 kubectl api-resources
46 cler
47 clear
48 kubectl
49 kubectl api-resources
50 clear
51 kubectl get ns
52 kubectl get pods -n=kube-system
53 clear
54 ls
55 kubectl create ns dev
56 kubectl create ns qa
57 kubectl get ns
58 kubectl describe ns dev
59 kubectl edit ns dev
60 kubectl describe ns dev
61 clear
62 kubectl get ns
63 kubectl delete ns qa
POD
apiVersion: v1
kind: Pod
metadata:
name: rajesh
labels:
app: helloworld
spec:
containers:
- name: devopsschool1
image: scmgalaxy/nginx-devopsschoolv1
ports:
- name: nginx-port
containerPort: 80
67 vi pod.yaml
68 kubectl create -f pod.yaml
69 kubectl get pods
70 kubectl get pods -o wide
71* kubectl get pods -o wide --sho
72 kubectl describe pod rajesh
73 clear
74 kubectl create -f pod.yaml
75 kubectl get ns
76 kubectl create -f pod.yaml -n=dev
77 kubectl get pods -n=dev
78 kubectl edit pod rajesh
79 kubectl describe pod rajesh
80 cler
81 clear
82 kubectl delete -f pod.yaml
83 kubectl delete -f pod.yaml -n=dev
84 history
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
cp Copy files and directories to and from containers
auth Inspect authorization
kubectl port-forward --address 0.0.0.0 pod/rajesh 8888:80
85 clear
86 kubectl
87 clear
88 ls
89 kubectl create -f pod.yaml
90 kubectl get pods
91 kubectl logs rajesh
92 kubectl get pods -o wide
93 kubectl logs rajesh
94 kubectl logs -f rajesh
95 kubectl attach rajesh
96 kubectl exec rajesh ls /tmp
97 kubectl exec -it rajesh /bin/bash
98 kubectl port-forward -h
99 clear
100 kubectl port-forward --address 0.0.0.0 pod/rajesh 8888:80
101 clear
102 kubectl get pods
103 ls
104 kubectl cp pod.yaml rajesh:/tmp
105 kubectl exec rajesh ls /tmp
106 kubectl auth
107 kubectl auth can-i create pod
108 kubectl auth can-i create service
109 history
============================================
Replication Controller
==============================================
Replication --- Many PODS
Controller == Desire == Actual PODS
apiVersion: v1
kind: ReplicationController
metadata:
name: rajesh
spec:
replicas: 3
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: scmgalaxy/nginx-devopsschoolv1
112 kubectl get rc
113 vi rc.yaml
114 kubectl create -f rc.yaml
115 kubectl get rc
116 kubectl get pods
117 kubectl edit rc rajesh
118 kubectl get pods
119 cler
120 kubectl get pods
121 kubectl edit rc rajesh
122 kubectl get pods
123 clear
124 kubectl get pods
125 kubectl delete pods rajesh-42dr5 rajesh-6zjpc
126 kubectl get pods
127 kubectl delete -f rc.yaml
128 kubectl get pods
129 kubectl get rc
Deployment
Replication + Controller + Versioning + Rollout + RollBack
=======================
ReplicaSets
kubectl create deployment my-dep --image=scmgalaxy/nginx-devopsschoolv1 --replicas=3
130 history
131 clear
132 kubectl create -h
133 kubectl create deployment -h
134 clear
135 kubectl create deployment my-dep --image=scmgalaxy/nginx-devopsschoolv1 --replicas=3
136 kubectl get deploy
137 kubectl get pods
138 kubectl get pods -o wide
139 curl http://192.168.1.29
140 clear
141 kubectl rollout
142 kubectl rollout history my-dep
143 kubectl get deployt
144 kubectl get deploy
145 kubectl rollout history my-dep
146 kubectl rollout history deploy my-dep
147 clear
148 kubectl edit deploy my-dep
149 kubectl get pods -o wide
150 curl http://192.168.1.32
151 kubectl rollout history deploy my-dep
152 kubectl rollout undo -h
153 kubectl rollout undo deploy/my-dep --to-revision=1
154 kubectl get pods -o wide
155 curl http://192.168.1.34
kubernetes deployment strategy explained with example
Services
========================================
LOADBALANCER of PODS
kubectl expose deployment my-dep --port=80 --target-port=80
kubectl expose deployment my-dep --port=80 --target-port=80 --type=NodePort --name=np
kubectl expose deployment my-dep --port=80 --target-port=80 --type=LoadBalancer --name=np
======================================================================
Security
RBAC
role
clusterrole
rolebnding
clusterbinding
serviceaccount
Storage
PV PVC StorrageClass
JObs
job
cronjob
PODS
statefulesets
deamonsets