How do we do rolling restart?

How do we do kubectl rollout restart deployment your_deployment_name ? I couldn’t locate appropriate documentation for this.

[moshevayner]

@nsubrahm-awsI believe the best way would be to use the patch deployment function and add a dummy annotation to the spec.template.metadata.annotations block. This should trigger the creation of a new replicaset and automatically handle the restart based on the strategy specified in the deployment spec. That is also what kubectl rollout restart deployment does behind the scenes. When you run kubectl rollout restart deployment, it adds a kubectl.kubernetes.io/restartedAt annotation which contains a timestamp, like this one:

apiVersion: apps/v1
kind: Deployment
spec:
  template:
    metadata:
      annotations:
        kubectl.kubernetes.io/restartedAt: "2021-02-15T11:12:54-05:00"

[moshevayner]

For the record, I found it here in the kubectl codebase