kubectl ConfigMap and Deployment

configmap-and-deployment.md

Problem

ConfigMap changes do not result in deployment changes (which makes sense generally)

Solution

If you change the configuration of your app, then you want the Deployment to restart your pods.

• use configMapRef and secretRef to keep things clean: https://gist.github.com/troyharvey/4506472732157221e04c6b15e3b3f094#file-deployment-yml-L26-L29
• make configmap and secret immutable, update deployment.yml accordingly https://stackoverflow.com/a/40624029/241240
• alternatively use kubectl rollout restart (if you catch your configmap / secrets changing)
• alternatively use helm to manage deployments
• alternatively use kustomize as mentioned here