Nova/Libvirt: mount vm state directories with bidirectional propagation

This PS updates the Nova and Libvirt charts to mount the vm state
directories with bidirectional mount propagation for k8s >= 1.10.
This allows mounts created by some volume drivers to be used, and
unaffected by pod restart.

Change-Id: Idaf664efb23a424dd8d9e1376ea7231b8565e3fe
Signed-off-by: Pete Birley <pete@port.direct>

libvirt/templates/daemonset-libvirt.yaml

@@ -141,8 +141,14 @@ spec:
               readOnly: true
             - name: var-lib-libvirt
               mountPath: /var/lib/libvirt
+              {{- if or ( gt .Capabilities.KubeVersion.Major "1" ) ( ge .Capabilities.KubeVersion.Minor "10" ) }}
+              mountPropagation: Bidirectional
+              {{- end }}
             - name: var-lib-nova
               mountPath: /var/lib/nova
+              {{- if or ( gt .Capabilities.KubeVersion.Major "1" ) ( ge .Capabilities.KubeVersion.Minor "10" ) }}
+              mountPropagation: Bidirectional
+              {{- end }}
             - name: run
               mountPath: /run
             - name: dev

nova/templates/daemonset-compute.yaml

@@ -234,8 +234,14 @@ spec:
               readOnly: true
             - name: varlibnova
               mountPath: /var/lib/nova
+              {{- if or ( gt .Capabilities.KubeVersion.Major "1" ) ( ge .Capabilities.KubeVersion.Minor "10" ) }}
+              mountPropagation: Bidirectional
+              {{- end }}
             - name: varliblibvirt
               mountPath: /var/lib/libvirt
+              {{- if or ( gt .Capabilities.KubeVersion.Major "1" ) ( ge .Capabilities.KubeVersion.Minor "10" ) }}
+              mountPropagation: Bidirectional
+              {{- end }}
             - name: run
               mountPath: /run
             - name: cgroup