Upgrades

We can upgrade by using kubectl set image deployment/deployment_name helloworld=obahareth/new_hello_world.

When we redeploy with a new image we get a new replicaset that matches the new set of images.

Rollouts

We can view the rollout history by running kubectl rollout history deployment/deployment_name, we can use the revision numbers here to roll back to a specific version as well.

Undoing

kubectl rollout undo deployment/deployment_name

This will roll back to the previous version

Rolling Back to a Specific Version

kubectl rollout undo deployment/deployment_name --to-revision=3

This will roll back to revision 3.