LABEL.md

Migrate to new labels without downtime

1. Delete deployment with --cascade=false
2. Delete the corresponding replicaset with --cascade=false too
3. Add label to orphaned pods to match the new service selector
4. Deploy the Helm Chart
5. Wait for the newly created pods to get ready
6. Delete orphaned pods using old selector labels

Example

kubectl delete deploy -l release=[RELEASE],app=[NAME] --cascade=false

kubectl delete rs -l release=[RELEASE],app=[NAME] --cascade=false

kubectl label pods -l release=[RELEASE],app=[NAME] \
  app.kubernetes.io/instance=[RELEASE] \
  app.kubernetes.io/name=[NAME]

kubectl delete pods -l release=[RELEASE],app=[NAME]