Merge "Add the NovaImageCacheTTL to the nova compute service" into stable/train

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

@@ -398,6 +398,14 @@ parameters:
                  The value can be multiple addresses separated by commas.
     type: comma_delimited_list
     default: []
+  NovaImageCacheTTL:
+    type: number
+    description: >
+      Time in seconds that nova compute should continue caching an image once
+      it is no longer used by any instances on the host
+    default: 86400
+    tags:
+      - role_specific
 
   # DEPRECATED: the following options are deprecated and are currently maintained
   # for backwards compatibility. They will be removed in future release.
@@ -496,6 +504,7 @@ resources:
               nova::disk_allocation_ratio: NovaDiskAllocationRatio
               nova::compute::libvirt::pmem_namespaces: NovaPMEMMappings
               nova_pmem_namespaces: NovaPMEMNamespaces
+              nova::compute::libvirt::remove_unused_original_minimum_age_seconds: NovaImageCacheTTL
             - values: {get_param: [RoleParameters]}
           - values:
               NovaVcpuPinSet: {get_param: NovaVcpuPinSet}
@@ -569,6 +578,7 @@ resources:
               NovaDiskAllocationRatio: {get_param: NovaDiskAllocationRatio}
               NovaPMEMMappings: {get_param: NovaPMEMMappings}
               NovaPMEMNamespaces: {get_param: NovaPMEMNamespaces}
+              NovaImageCacheTTL: {get_param: NovaImageCacheTTL}
 
 conditions:
   insecure_registry_is_empty: {equals : [{get_param: DockerInsecureRegistryAddress}, []]}

releasenotes/notes/nova_image_cache_ttl-824f241363b9dd4e.yaml

@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Add the NovaImageCacheTTL to the nova compute service.
+    This exposes the remove_unused_original_minimum_age_seconds from nova.conf
+    which controls the time (in seconds) that nova compute should continue
+    caching an image once it is no longer used by and instances on the host.
+    Defaults to 86400 (24hrs)