(K8s) Kubernetes lab 103 Pods with Yaml

Step 0 : Create docker hub account. https://hub.docker.com

Step 1 : Open Play with Kubernetes login with your docker hub account.

Step 2 : Click on start

Step 3 : It will start a 4 hr session, click on + ADD NEW INSTANCE

Step 4 : Click in terminal and run steps from lab 101 to build cluster

Step 5 : vi pod.yaml

apiVersion: v1

kind: Pod

metadata:

name: demo

labels:

app: demo

type: web

spec:

containers:

- name: demo-nginx

image: nginx

ports:

- containerPort: 80

  • create a new file pod.yaml

  • apiVersion, Kind, metadata.name and spec are required field

  • you may add labels

  • you can use any key: value pairs for labels

  • labels are used to select pods

  • provide name to container

  • provide image for container

Step 6 : kubectl apply -f pod.yaml

  • this command will create pod

Step 7 : kubectl get pods

  • this command will list all the pods in default namespace

Step 8 : kubectl exec -it demo -- bash

  • this command will provide prompt inside pod

  • run ls -la to check files inside pod

Step 9 : kubectl logs demo

  • this command show logs for app running in pod

Step 10 : kubectl logs -f demo

  • this command will print pod logs on terminal

  • it will follow logs

  • use Ctl + c t stop logs and exit

Step 11 : kubectl logs -f demo --tail=1

  • tail command will start from current logs

  • with 1 recent log

Step 12 : kubectl get pods -o wide

  • this command will list all pods with information of node pods are running

Step 13 : kubectl describe pod demo

  • this command will provide details of pod

Step 14 : kubectl get pods demo -o yaml

  • this command will provide details similar to describe but in yaml format

Step 15 : kubectl get pods demo -o json

  • this command will provide details similar to above commands in json format

Step 16 : kubectl delete pod demo

  • this command will delete pods demo