Kubernetes Cookbook - Second Edition

Updating the YAML and using kubectl apply

For demo purposes, copy deploy.yaml to deploy_1.12.2.yaml and change the nginx version to 1.12.2, as follows:

        image: nginx:1.12.2

Then run the kubectl apply command with the --record option:

$ kubectl apply -f deploy_1.12.2.yaml --recorddeployment.apps "my-nginx" configured

This will perform the same thing as the kubectl set image command, so you can see that the nginx image version has been bumped up to 1.12.2; also, the OldReplicaSets/NewReplicaSet combination has been changed as follows:

$ kubectl describe deploy my-nginxName:                   my-nginx……Pod Template:  Labels: run=my-nginx  Containers:   my-nginx:    Image: nginx:1.12.2......Conditions:  Type           Status  Reason  ----           ------  ------ Available True MinimumReplicasAvailable ...