Hey everyone! I currently have a StorageClass set to reclaimPolicy: Delete in my Kubernetes cluster. I'm looking to change it to Retain so that I don't lose any persistent volume data when I delete PVCs. I'm a bit worried about the data in the PVCs that are already using this StorageClass. How can I safely make this change?
1 Answer
You can't change the `reclaimPolicy` directly on the StorageClass since it’s immutable. But you can edit the Persistent Volume (PV) that it creates to change the `reclaimPolicy` to Retain, and you’ll be fine! Just make sure to set up a new StorageClass with `reclaimPolicy: Retain` for the future.
If you’re worried about existing data, you might consider migrating it safely. One way could be to mount both the old and new PVs in a pod and use an initContainer to transfer the data between them. That’s just one approach, but it’s worth considering!
Actually, it’s simpler than that! Just edit the PV directly and change the `reclaimPolicy` to Retain. This way, you won’t lose any data and you don’t need to manually synchronize anything!