Comment 2 for bug 1926494

Initially putting the webhook concern aside, I've made a few initial MRs for this. I don't expect them to be accepted as-is, but I hope for feedback:

* https://github.com/charmed-kubernetes/cdk-addons/pull/206
* https://github.com/charmed-kubernetes/charm-kubernetes-master/pull/162

I was able to manually test that the needed bits get deployed successfully in my test environment after redirecting rocks.canonical.com:443/cdk/sig-storage/snapshot-controller:v3.0.2 to k8s.gcr.io/sig-storage/snapshot-controller:v3.0.2 to k8s.gcr.io/sig-storage/snapshot-controller:v3.0.2.

I have not yet verified actually performing volume snapshots via these patches; I'm trying to set up a ceph-rdb backend from now to verify.