Support for libvirt volume multipath

Adds support for libvirt volume_use_multipath the ability to
use multipath connection of the iSCSI or FC volume.
Volumes can be connected in the LibVirt as multipath devices.
Adds new parameter NovaLibvirtVolumeUseMultipath.

Change-Id: I18a030a445de652fbc492029afec6558a9661857
(cherry picked from commit 983920efba)

puppet/services/nova-compute.yaml

@@ -189,6 +189,12 @@ parameters:
       - allowed_values: [ 256, 512, 1024 ]
     tags:
       - role_specific
+  NovaLibvirtVolumeUseMultipath:
+    default: false
+    description: Whether to enable or not the multipath connection of the volumes.
+    type: boolean
+    tags:
+      - role_specific
 
 conditions:
   enable_live_migration_tunnelled:
@@ -224,6 +230,7 @@ resources:
               nova::compute::resume_guests_state_on_host_boot: NovaResumeGuestsStateOnHostBoot
               nova::compute::libvirt::rx_queue_size: NovaLibvirtRxQueueSize
               nova::compute::libvirt::tx_queue_size: NovaLibvirtTxQueueSize
+              nova::compute::libvirt::volume_use_multipath: NovaLibvirtVolumeUseMultipath
             - values: {get_param: [RoleParameters]}
           - values:
               NovaVcpuPinSet: {get_param: NovaVcpuPinSet}
@@ -234,6 +241,7 @@ resources:
               NovaResumeGuestsStateOnHostBoot: {get_param: NovaResumeGuestsStateOnHostBoot}
               NovaLibvirtRxQueueSize: {get_param: NovaLibvirtRxQueueSize}
               NovaLibvirtTxQueueSize: {get_param: NovaLibvirtTxQueueSize}
+              NovaLibvirtVolumeUseMultipath: {get_param: NovaLibvirtVolumeUseMultipath}
 
 outputs:
   role_data:

releasenotes/notes/volume_use_multipath-for-libvirt--c8e93a0bb83e0bc8.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Add support for libvirt volume_use_multipath the ability to
+    use multipath connection of the iSCSI or FC volume.
+    Volumes can be connected in the LibVirt as multipath devices.
+    Adds new parameter "NovaLibvirtVolumeUseMultipath".