CentOS Stream 10: Deploy Pods

This is the basic operation to create pods and others on Kubernetes Cluster.

Work on Manager Node or Client Hosts with cluster admin file configured.

Create Pods

Create a deployment with nginx image:

kubectl create deployment test-nginx --image=nginx

View running pods:

kubectl get pods

Pod Operations

Show environment variables inside a pod:

kubectl exec test-nginx-b6dfcf6bd-ql4zb -- env

Shell access to a pod:

kubectl exec -it test-nginx-b6dfcf6bd-ql4zb -- bash

View pod logs:

kubectl logs test-nginx-b6dfcf6bd-ql4zb

Scale Pods

Scale the deployment to 3 replicas:

kubectl scale deployment test-nginx --replicas=3
kubectl get pods -o wide

Expose Service

Expose the deployment as a NodePort service:

kubectl expose deployment test-nginx --type="NodePort" --port 80
kubectl get services test-nginx

Port-forward to verify access:

kubectl port-forward service/test-nginx --address 127.0.0.1 8082:80 &
curl localhost:8082

Clean Up

Delete service and deployment:

kubectl delete services test-nginx
kubectl delete deployment test-nginx