A Kubernetes worker node, named wk8s-node-0 is in state NotReady. Investigate why this is the case, and perform any appropriate steps to bring the node to a Ready state, ensuring that any changes are made permanent.
You can ssh to the failed node using:
[student@node-1] $ | ssh Wk8s-node-0
You can assume elevated privileges on the node with the following command:
[student@w8ks-node-0] $ | sudo -i

Correct Answer:

solution

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Create a pod with environment variables as var1=value1.Check the environment variable in pod

• A.kubectl run nginx --image=nginx --restart=Never --env=var1=value1
  # then
  kubectl exec -it nginx -- env
  # or
  kubectl exec -it nginx -- sh -c 'echo $var1'
  # or
  kubectl describe po nginx | grep value1
• B.kubectl run nginx --image=nginx --restart=Never --env=var1=value1
  # then
  kubectl exec -it nginx -- env
  # or
  kubectl describe po nginx | grep value1

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Modify "hello-job" and make it run 10 times one after one and 5 times parallelism: 5

• A.kubectl create job hello-job --image=busybox --dry-run -o yaml
  -- echo "Hello I am from job" > hello-job.yaml
  // edit the yaml file to add completions: 16 and
  kubectl create -f hello-job.yaml
  YAML File:
  apiVersion: batch/v1
  kind: Job
  metadata:
  name: hello-job
  spec:
  completions: 16
  parallelism: 5
  template:
  metadata:
  spec:
  containers:
  - command:
  - echo
  - Hello I am from job
  image: busybox
  name: hello-job
  restartPolicy: Never
• B.kubectl create job hello-job --image=busybox --dry-run -o yaml
  -- echo "Hello I am from job" > hello-job.yaml
  // edit the yaml file to add completions: 10 and
  kubectl create -f hello-job.yaml
  YAML File:
  apiVersion: batch/v1
  kind: Job
  metadata:
  name: hello-job
  spec:
  completions: 10
  parallelism: 5
  template:
  metadata:
  spec:
  containers:
  - command:
  - echo
  - Hello I am from job
  image: busybox
  name: hello-job
  restartPolicy: Never

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