Use volume ID as a prefix if the bucket is fixed in the storage class

With this, each volume will get its own prefix within the bucket if it
is configured in the storage class. This also ensures backwards
compatibility with older volumes that have been created in earlier
versions of csi-s3.

deploy/kubernetes/csi-s3.yaml

@@ -81,7 +81,8 @@ spec:
             capabilities:
               add: ["SYS_ADMIN"]
             allowPrivilegeEscalation: true
-          image: ctrox/csi-s3:v1.1.1
+          image: ctrox/csi-s3:dev
+          imagePullPolicy: Never
           args:
             - "--endpoint=$(CSI_ENDPOINT)"
             - "--nodeid=$(NODE_ID)"

deploy/kubernetes/examples/storageclass.yaml

@@ -8,6 +8,8 @@ parameters:
   # specify which mounter to use
   # can be set to rclone, s3fs, goofys or s3backer
   mounter: rclone
+  # to use an existing bucket, specify it here:
+  # bucket: some-existing-bucket
   csi.storage.k8s.io/provisioner-secret-name: csi-s3-secret
   csi.storage.k8s.io/provisioner-secret-namespace: kube-system
   csi.storage.k8s.io/controller-publish-secret-name: csi-s3-secret

deploy/kubernetes/provisioner.yaml

@@ -87,7 +87,8 @@ spec:
             - name: socket-dir
               mountPath: /var/lib/kubelet/plugins/ch.ctrox.csi.s3-driver
         - name: csi-s3
-          image: ctrox/csi-s3:v1.1.1
+          image: ctrox/csi-s3:dev
+          imagePullPolicy: Never
           args:
             - "--endpoint=$(CSI_ENDPOINT)"
             - "--nodeid=$(NODE_ID)"