Say we have this in a deployment.yml
containers:
- name: my_container
imagePullPolicy: Always
image: my_image:latestand so redeployment might take the form of:
kubectl set image deployment/my-deployment my_container=my_imagewhich I stole from here:
https://stackoverflow.com/a/40368520/1223975
my question is - is this the right way to do a rolling-update? Will the above always work to make sure the deployment gets the new image? My deployment.yml might never change - it might just be my_image:latest forever, so how to do rolling updates?
I don't expect this to be an accepted answer. But I wanted to make it for the future as there is a command to do this in Kubernetes 1.15.
PR https://github.com/kubernetes/kubernetes/pull/76062 added a command called kubectl rollout restart. It is part of Kubernetes 1.15. In the future you will be able to do:
kubectl rollout restart deployment/my-deployment