kubectl - Pod Design

Question 1

list pods labels in my-namespace

Answer 1

kubectl get po –show-labels -n my-namespace

Question 2

Create nginx-prod1 pod with label env=prod

Answer 2

kubectl run nginx-prod1 –image=nginx –restart=Never –labels=env=dev

Question 3

show pods with label env=dev

Answer 3

kubectl get po -l env=dev

Question 4

show pods that have label env

Answer 4

kubectl get po -L env

Question 5

create nginx pod on node-1

Answer 5

1. kubectl run nginx –image=nginx –restart=Never –dry-run=client -o yaml > nginx-pod.yaml
2. Add yaml:
   spec:
   nodeName: node-1
3. kubectl create -f nginx-pod.yaml

Question 6

Create a service for nginx on port 80 targeting port 9376

Answer 6

kubectl expose deployment nginx –port=80 –targetPort=9376

Question 7

Create deployment named hr-app running nginx:1.18 with 2 replicas

Answer 7

1. kubectl create deployment hr-app –image=nginx:1.18 –dry-run=client -o yaml > deploy.yaml
2. vim deploy.yaml ->
   spec:
   replicas: 2

Question 8

Scale hr-app to 3 replicas

Answer 8

kubectl scale deployment/hr-app –replicas 3

Question 9

Remove a NoSchedule taint from node1 with selector spray=mortein

Answer 9

kubectl taint nodes node1 spray=mortein:NoSchedule-

Question 10

Label node1 node with color=blue

Answer 10

kubectl label node node1 color=blue

Question 11

Clean cluster by removing autoscaled deployment webapp

Answer 11

kubectl delete deployment webapp

kubectl delete hpa webapp

Question 12

create cronjob date-job that uses busybox image a prints date and “hello” every minute

Answer 12

kubectl create cronjob date-job –image=busybox –schedule=”*/1 * * * *” – bin/sh -c “date; echo hello”