diff --git a/environments/manila-cephfsganesha-config.yaml b/environments/manila-cephfsganesha-config.yaml
index 9a58fe3ba3..78e2345d7a 100644
--- a/environments/manila-cephfsganesha-config.yaml
+++ b/environments/manila-cephfsganesha-config.yaml
@@ -16,6 +16,7 @@ parameter_defaults:
   ManilaCephFSDriverHandlesShareServers: false
   ManilaCephFSCephFSAuthId: 'manila'
   ManilaCephFSCephFSEnableSnapshots: false
+  ManilaCephFSCephVolumeMode: '0755'
   # manila cephfs driver supports either native cephfs backend - 'CEPHFS'
   # (users mount shares directly from ceph cluster), or nfs-ganesha backend -
   # 'NFS' (users mount shares through nfs-ganesha server)
diff --git a/environments/manila-cephfsnative-config.yaml b/environments/manila-cephfsnative-config.yaml
index d85109ec5a..7899ac1767 100644
--- a/environments/manila-cephfsnative-config.yaml
+++ b/environments/manila-cephfsnative-config.yaml
@@ -13,6 +13,7 @@ parameter_defaults:
   ManilaCephFSDriverHandlesShareServers: false
   ManilaCephFSCephFSAuthId: 'manila'
   ManilaCephFSCephFSEnableSnapshots: false
+  ManilaCephFSCephVolumeMode: '0755'
   # manila cephfs driver supports either native cephfs backend - 'CEPHFS'
   # (users mount shares directly from ceph cluster), or nfs-ganesha backend -
   # 'NFS' (users mount shares through nfs-ganesha server)
diff --git a/puppet/services/manila-backend-cephfs.yaml b/puppet/services/manila-backend-cephfs.yaml
index b9dadaf937..80f731ad07 100644
--- a/puppet/services/manila-backend-cephfs.yaml
+++ b/puppet/services/manila-backend-cephfs.yaml
@@ -55,6 +55,9 @@ parameters:
   ManilaCephFSCephFSEnableSnapshots:
     type: boolean
     default: false
+  ManilaCephFSCephVolumeMode:
+    type: string
+    default: '0755'
   ManilaCephFSCephFSProtocolHelperType:
     default: CEPHFS
     description: Protocol type ('CEPHFS' or 'NFS') when cephfs back end
@@ -89,6 +92,7 @@ outputs:
         manila::backend::cephfs::cephfs_auth_id: {get_param: ManilaCephFSCephFSAuthId}
         manila::backend::cephfs::cephfs_cluster_name: {get_param: CephClusterName}
         manila::backend::cephfs::cephfs_enable_snapshots: {get_param: ManilaCephFSCephFSEnableSnapshots}
+        manila::backend::cephfs::cephfs_volume_mode: {get_param: ManilaCephFSCephVolumeMode}
         manila::backend::cephfs::ceph_client_key: {get_param: CephManilaClientKey}
         manila::backend::cephfs::cephfs_protocol_helper_type: {get_param: ManilaCephFSCephFSProtocolHelperType}
       step_config:
diff --git a/releasenotes/notes/Support-ceph_volume_mode-parameter-5553a9b39718a749.yaml b/releasenotes/notes/Support-ceph_volume_mode-parameter-5553a9b39718a749.yaml
new file mode 100644
index 0000000000..c4c632de04
--- /dev/null
+++ b/releasenotes/notes/Support-ceph_volume_mode-parameter-5553a9b39718a749.yaml
@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    Support setting values for ``cephfs_volume_mode`` manila parameter via
+    the THT parameter ManilaCephFSCephVolumeMode.  These control the POSIX
+    rwx mode of the cephfs volumes, snapshots, and groups of these that back
+    corresponding manila resources.  Default value for ManilaCephFSCephVolumeMode
+    is '0755', backwards-compatible with the mode for these objects before it
+    was settable.