feat: resize pvc

[jiuker]

fix #1780

[shtripat]

Please add few verification steps. I edited tenant and added additionalStorage: 2Gi under .spec.pools[0] but PVCs still show old storage value.

[shtripat]

LGTM. Remove the debug prints.

[shtripat]

lgtm

[pjuarezd]

I am not sure this is good, what is preventing Operator from increase infinite times the Storage?

CRD's and resources are declarative ways to ask what is expected, the additionalStorage field seems a procedural one.
ie, declarative is: Give me a 10GB PV, this other seems procedural Give me 10GB PV, then add other 5GB.

I think this should be revaluated @jiuker, can the PV's be resized?, ie: I know DirectPV can Expand Volume, I think that is what we should be suggesting to users instead of workaround it in Operator.

[jiuker]

I am not sure this is good, what is preventing Operator from increase infinite times the Storage?

CRD's and resources are declarative ways to ask what is expected, the additionalStorage field seems a procedural one. ie, declarative is: Give me a 10GB PV, this other seems procedural Give me 10GB PV, then add other 5GB.

I think this should be revaluated @jiuker, can the PV's be resized?, ie: I know DirectPV can Expand Volume, I think that is what we should be suggesting to users instead of workaround it in Operator.

The intention here is simply to execute a command similar to expanding a PVC without causing the STS to restart. Many STS scaling operations typically result in pod restarts. Alternatively, we could use a MinioJob to accomplish this task. If this is possible, let's close this PR. @pjuarezd