Command for Those Who Don’t Want Use Kubectl Edit

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Introduction

For those of us who don’t want to edit resources with an editor that launches with a kubectl edit command, there is command kubectl patch, so let’s take advantage of it. The nice thing about the patch command is that you don’t have to handwrite it in the editor. Since resources can be changed with one liner, it is also suitable for embedding in shell scripts.

Let’s test this !

Run example deployment

root@vagrant:/home/vagrant# kubectl create deployment nginx --image=spy86/nginx:latest
deployment.apps/nginx created
root@vagrant:/home/vagrant# kubectl get po
NAME                     READY   STATUS    RESTARTS   AGE
nginx-6465f7cb5d-phgmr   1/1     Running   0          8s
root@vagrant:/home/vagrant# kubectl get deploy
NAME    READY   UP-TO-DATE   AVAILABLE   AGE
nginx   1/1     1            1           10s
root@vagrant:/home/vagrant#

Modify the container image

It can be used when you want to change the image version temporarily.

root@vagrant:/home/vagrant# kubectl patch deployment nginx -p '{"spec":{"template":{"spec":{"containers":[{"name":"nginx","image":"spy86/nginx:147"}]}}}}'
deployment.apps/nginx patched
root@vagrant:/home/vagrant#…