Add param for RBD disk cache modes

New parameter to control RBD disk caching modes.

Depends-On: https://review.opendev.org/792326
Change-Id: I6fac9ff39892c08453c050816f61a4bcee4bddf0
Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>

deployment/nova/nova-compute-container-puppet.yaml

@@ -787,6 +787,12 @@ parameters:
     description: The name of the stack/plan.
     type: string
 
+  RbdDiskCachemodes:
+    type: comma_delimited_list
+    default: ['network=writeback']
+    description: >
+      Disk cachemodes for RBD backend.
+
 parameter_groups:
 - label: deprecated
   description: |
@@ -1093,6 +1099,7 @@ outputs:
                 - {get_param: CephClientUserName}
             tripleo::profile::base::nova::compute::cinder_nfs_backend: {get_param: CinderEnableNfsBackend}
             rbd_persistent_storage: {get_param: CinderEnableRbdBackend}
+            rbd_disk_cachemodes: {get_param: RbdDiskCachemodes}
             nova::keystone::authtoken::project_name: 'service'
             nova::keystone::authtoken::user_domain_name: 'Default'
             nova::keystone::authtoken::project_domain_name: 'Default'
@@ -1115,7 +1122,7 @@ outputs:
             nova::compute::live_migration_wait_for_vif_plug: {get_param: NovaLiveMigrationWaitForVIFPlug}
             nova::migration::libvirt::live_migration_permit_post_copy:
               if:
-                - permit_post_copy_set 
+                - permit_post_copy_set
                 - {get_attr: [RoleParametersValue, value, nova_permit_post_copy]}
                 - if:
                   - live_migration_optimization_set

deployment/nova/nova-libvirt-container-puppet.yaml

@@ -297,6 +297,11 @@ parameters:
     description: >
       Setting this to a unique value will re-run any deployment tasks which
       perform configuration on a Heat stack-update.
+  RbdDiskCachemodes:
+    type: comma_delimited_list
+    default: ['network=writeback']
+    description: >
+      Disk cachemodes for RBD backend.
 
 conditions:
   use_tls_for_live_migration:
@@ -364,7 +369,7 @@ resources:
               VhostuserSocketGroup: {get_param: VhostuserSocketGroup}
               QemuMemoryBackingDir: {get_param: QemuMemoryBackingDir}
               NovaLibvirtOptVolumes: {get_param: NovaLibvirtOptVolumes}
-  
+
   ContainersCommon:
     type: ../containers-common.yaml
 
@@ -447,6 +452,7 @@ outputs:
             nova::compute::libvirt::log_filters: {get_param: LibvirtLogFilters}
             nova::compute::libvirt::virtlogd::log_filters: {get_param: LibvirtVirtlogdLogFilters}
             rbd_persistent_storage: {get_param: CinderEnableRbdBackend}
+            rbd_disk_cachemodes: {get_param: RbdDiskCachemodes}
           - if:
               - use_tls_for_live_migration
               - tripleo::profile::base::nova::migration::client::libvirt_tls: true

releasenotes/notes/rbd-disk-cache-modes-284a73271741ea62.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    New parameter `RbdDiskCachemodes` allows to override
+    the disk cache modes for RBD. Defaults to ['network=writeback'].