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
<blockquote class="wp-embedded-content" data-secret="DVfIHW7d1a"><a href="https://www.devopsschool.com/blog/kubernetes-deployment-strategy-explained-with-example/">kubernetes deployment strategy explained with example</a></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; visibility: hidden;" title="“kubernetes deployment strategy explained with example” — DevOpsSchool.com" src="https://www.devopsschool.com/blog/kubernetes-deployment-strategy-explained-with-example/embed/#?secret=o14YJtCNuR#?secret=DVfIHW7d1a" data-secret="DVfIHW7d1a" width="600" height="338" frameborder="0" marginwidth="0" marginheight="0" scrolling="no"></iframe>
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	
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