Unable to run Helm chart v2.2.0 on OpenShift

[jacksgt]

Hi,

I'm trying to upgrade from v2.1.2 to v2.2.0 on our OKD cluster, but the controllerplugin is stuck with:

$ oc logs cvmfs-csi-controllerplugin-786ccbd9cc-vbffq -c provisioner
I0614 07:39:30.215802       1 feature_gate.go:249] feature gates: &{map[]}
I0614 07:39:30.216116       1 csi-provisioner.go:154] Version: v3.5.0
I0614 07:39:30.216144       1 csi-provisioner.go:177] Building kube configs for running in cluster...
W0614 07:39:40.217914       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:39:50.217133       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:40:00.218146       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:40:10.217237       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:40:20.217113       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:40:30.218064       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:40:40.217546       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:40:50.217479       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:41:00.217731       1 connection.go:183] Still connecting to unix:///csi/csi.sock
W0614 07:41:10.217187       1 connection.go:183] Still connecting to unix:///csi/csi.sock

$ oc logs cvmfs-csi-controllerplugin-786ccbd9cc-vbffq -c controllerplugin
panic: mkdir /var/lib/cvmfs.csi.cern.ch: permission denied

goroutine 1 [running]:
github.com/cernops/cvmfs-csi/internal/cvmfs/singlemount.init.0()
	/builds/kubernetes/storage/cvmfs-csi/internal/cvmfs/singlemount/sharedmount.go:108 +0x45

It looks like the controller plugin is trying to write into the root FS of the container image.
I wanted to mount an emptyDir at /var/lib/cvmfs.csi.cern.ch, but the Helm chart doesn't support extraVolumeMounts for the controllerplugin.plugin section (even though it's mentioned in the Helm values):

• https://github.com/cvmfs-contrib/cvmfs-csi/blob/master/deployments/helm/cvmfs-csi/values.yaml#L167
• https://github.com/cvmfs-contrib/cvmfs-csi/blob/master/deployments/helm/cvmfs-csi/templates/controllerplugin-deployment.yaml#L51

If the controllerplugin tries to write into this directory, should the Helm chart mount an emptyDir there generally?