deploy: add resize support to NFS-provisioner deployment

Resizing is handled by the csi-resizer container, which needs to run in
the provisioner Pod. In addition to the container, the StorageClass also
needs to allow volume expansion.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

deploy/nfs/kubernetes/csi-nfsplugin-provisioner.yaml

@@ -54,6 +54,22 @@ spec:
           volumeMounts:
             - name: socket-dir
               mountPath: /csi
+        - name: csi-resizer
+          image: registry.k8s.io/sig-storage/csi-resizer:v1.4.0
+          args:
+            - "--csi-address=$(ADDRESS)"
+            - "--v=5"
+            - "--timeout=150s"
+            - "--leader-election"
+            - "--retry-interval-start=500ms"
+            - "--handle-volume-inuse-error=false"
+          env:
+            - name: ADDRESS
+              value: unix:///csi/csi-provisioner.sock
+          imagePullPolicy: "IfNotPresent"
+          volumeMounts:
+            - name: socket-dir
+              mountPath: /csi
         - name: csi-nfsplugin
           # for stable functionality replace canary with latest release version
           image: quay.io/cephcsi/cephcsi:canary

examples/nfs/storageclass.yaml

@@ -46,4 +46,4 @@ parameters:
   volumeNamePrefix: nfs-export-
 
 reclaimPolicy: Delete
-allowVolumeExpansion: false
+allowVolumeExpansion: true