Lab 7 – Kubernetes – 6 July 2023

   25  ls $HOME/.kube/config
   26  more /root/.kube/config
   27  clear
   28  kubectl config vide
   29  kubectl config view
   30  clear
   31  kubectl version
   32  kubectl
   33  clear
   34  kubectl cluster-info
   35  kubectl
   36  kubectl  api-resources
   37  kubectl  api-version
   38  kubectl  api-versions
   39  kubectl nodes
   40  kubectl get nodes
   41  kubectl get pods --all-namespaces

==========================================================================

CRUD
	create
			CMD	
				create
			YAML
				create -f yaml
	read
			CMD
				get
				describe
			YAML
				get -f yaml
	update
			CMD
				edit
			YAML
				apply -f 

	delete
			CMD
				delete 
			YAML
				delete -f 

What is Namesapce?

  49  ls
   50  kubectl get ns
   51  clear
   52  kubectl -h
   53  clear
   54  kubectl create -h
   55  clear
   56  kubectl create ns -h
   57  cler
   58  clear
   59  kubectl create ns rajesh
   60  kubectl get ns
   61  kubectl edit ns rajesh
   62  kubectl get ns
   63  kubectl describe ns rajesh
   64  kubectl delete ns rajesh
   65  kubectl get ns

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

  69  mkdir rajesh
   70  cd rajesh/
   71  ls
   72  vi pod.yaml
   73  clear
   74  kubectl get pods
   75  kubectl get ns
   76  clear
   77  ls
   78  kubectl get ns
   79  kubectl get pods
   80  kubectl get pods -n=ashu
   81  clear
   82  ls
   83  kubectl create -f pod.yaml
   84  kubectl create ns rajesh
   85  kubectl create -f pod.yaml -n=rajesh
   86  kubectl get pods
   87  kubectl get deploy
   88  kubectl delete deploy preeti
   89  clear
   90  kubectl get pods
   91  kubectl edit pod rajesh
   92  kubectl get pods
   93  kubectl describe pod rajesh
   94  clear
   95  kubectl get pods
   96  kubectl get pods -n=rajesh
   97  history
   98  clear
   99  ls
  100  vi pod.yaml
  101  kubectl apply -f pod.yaml
  102  kubectl describe pod rajesh
  103  q!
  104  clear
  105  ls
  106  kubectl delete -f pod.yaml
  107  kubectl delete -f pod.yaml -n=rajesh
  108  kubectl get pods

===========================

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


 114  kubectl get pods
  115  kubectl get pods -o wide
  116  kubectl logs rajesh
  117  curl http://192.168.1.16
  118  kubectl logs rajesh
  119  curl http://192.168.1.16
  120  kubectl logs rajesh
  121  kubectl attach rajesh
  122  clear
  123  kubectl get pods
  124  kubectl exec rajesh ls
  125  kubectl exec -it rajesh /bin/bash
  126  clear
  127  kubectl get pods
  128  kubectl port-forward -h
  129  clear
  130  kubectl port-forward --address 0.0.0.0 pod/rajesh 8888:80
  131  clear
  132  ls
  133  kubectl cp pod.yaml rajesh:/tmp
  134  kubectl exec rajesh ls /tmp
  135  kubectl
  136  clear
  137  kubectl auth
  138  kubectl auth can-i create pod
  139  kubectl auth can-i create svc

https://www.devopsschool.com/blog/kubernetes-deployment-strategy-explained-with-example/  

176  kubectl expose -h
  177  clear
  178  kubectl get svc
  179  kubectl expose deployment my-dep --port=80 --target-port=80
  180  kubectl get svc
  181  curl http://10.110.10.104
  182  kubectl expose deployment -h
  183  kubectl expose deployment my-dep --port=80 --target-port=80 --type=NodePort --name=np
  184  kubectl get svc