Use EmptyDir to store provisioner socket

currently, we are making use of host path directory
to store the provisioner socket, as this
the socket is not needed by anyone else other than
containers inside the provisioner pod using the
empty directory to store this socket is the best option.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
(cherry picked from commit fbda8cc4caf6ca818dc62a23d12d51c582cf8067)

charts/ceph-csi-cephfs/templates/provisioner-deployment.yaml

@@ -145,9 +145,9 @@ spec:
 {{- end }}
       volumes:
         - name: socket-dir
-          hostPath:
-            path: {{ .Values.socketDir }}
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: host-sys
           hostPath:
             path: /sys

charts/ceph-csi-cephfs/templates/provisioner-statefulset.yaml

@@ -142,9 +142,9 @@ spec:
 {{- end }}
       volumes:
         - name: socket-dir
-          hostPath:
-            path: {{ .Values.socketDir }}
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: host-sys
           hostPath:
             path: /sys

charts/ceph-csi-rbd/templates/provisioner-deployment.yaml

@@ -162,9 +162,9 @@ spec:
 {{- end }}
       volumes:
         - name: socket-dir
-          hostPath:
-            path: {{ .Values.socketDir }}
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: host-dev
           hostPath:
             path: /dev

charts/ceph-csi-rbd/templates/provisioner-statefulset.yaml

@@ -159,9 +159,9 @@ spec:
 {{- end }}
       volumes:
         - name: socket-dir
-          hostPath:
-            path: {{ .Values.socketDir }}
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: host-dev
           hostPath:
             path: /dev

deploy/cephfs/kubernetes/v1.13/csi-cephfsplugin-provisioner.yaml

@@ -133,9 +133,9 @@ spec:
           imagePullPolicy: "IfNotPresent"
       volumes:
         - name: socket-dir
-          hostPath:
-            path: /var/lib/kubelet/plugins/cephfs.csi.ceph.com
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: host-sys
           hostPath:
             path: /sys

deploy/cephfs/kubernetes/v1.14+/csi-cephfsplugin-provisioner.yaml

@@ -136,9 +136,9 @@ spec:
           imagePullPolicy: "IfNotPresent"
       volumes:
         - name: socket-dir
-          hostPath:
-            path: /var/lib/kubelet/plugins/cephfs.csi.ceph.com
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: host-sys
           hostPath:
             path: /sys

deploy/rbd/kubernetes/v1.13/csi-rbdplugin-provisioner.yaml

@@ -156,9 +156,9 @@ spec:
           hostPath:
             path: /lib/modules
         - name: socket-dir
-          hostPath:
-            path: /var/lib/kubelet/plugins/rbd.csi.ceph.com
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: ceph-csi-config
           configMap:
             name: ceph-csi-config

deploy/rbd/kubernetes/v1.14+/csi-rbdplugin-provisioner.yaml

@@ -160,9 +160,9 @@ spec:
           hostPath:
             path: /lib/modules
         - name: socket-dir
-          hostPath:
-            path: /var/lib/kubelet/plugins/rbd.csi.ceph.com
-            type: DirectoryOrCreate
+          emptyDir: {
+            medium: "Memory"
+          }
         - name: ceph-csi-config
           configMap:
             name: ceph-csi-config