diff --git a/deployment/cinder/cinder-common-container-puppet.yaml b/deployment/cinder/cinder-common-container-puppet.yaml
index eb33afa2e4..74bdfb401e 100644
--- a/deployment/cinder/cinder-common-container-puppet.yaml
+++ b/deployment/cinder/cinder-common-container-puppet.yaml
@@ -64,6 +64,16 @@ parameters:
       be managed by pacemaker. If these criteria are not met then the cluster
       name must be left blank.
     type: string
+  CinderImageConversionNfsShare:
+    default: ''
+    description: When set, the NFS share to be used for Cinder's image conversion
+                 directory.
+    type: string
+  CinderImageConversionNfsOptions:
+    default: '_netdev,bg,intr,context=system_u:object_r:container_file_t:s0'
+    description: NFS mount options when using an NFS share for Cinder's image
+                 conversion directory.
+    type: string
   EnableInternalTLS:
     type: boolean
     default: false
@@ -124,12 +134,25 @@ conditions:
       - equals: [{get_param: EnableInternalTLS}, true]
       - equals: [{get_param: EnableEtcdInternalTLS}, true]
 
+  cinder_nfs_conversion_dir_enabled:
+    not:
+      equals:
+        - {get_param: CinderImageConversionNfsShare}
+        - ''
+
 resources:
 
   ContainersCommon:
     type: ../containers-common.yaml
 
 outputs:
+  cinder_image_conversion_nfs_dir:
+    description: The directory where cinder does its image conversion when the
+                 directory is backed by an NFS share.
+    value: &cinder_image_conversion_nfs_dir
+      # Avoid SELinux conflicts by choosing a location outside /var/lib/cinder
+      /var/lib/cinder_image_conversion
+
   cinder_common_host_prep_tasks:
     description: Common host prep tasks for cinder-volume and cinder-backup services
     value: &cinder_common_host_prep_tasks
@@ -221,7 +244,26 @@ outputs:
     value:
       list_concat:
         - *cinder_common_host_prep_tasks
-        -
+        - - name: Support using an NFS share for cinder image conversion
+            vars:
+              image_conversion_nfs_enabled: {if: [cinder_nfs_conversion_dir_enabled, true, false]}
+            when:
+              - image_conversion_nfs_enabled|bool
+            block:
+              - name: Create cinder image conversion directory
+                file:
+                  path: *cinder_image_conversion_nfs_dir
+                  state: directory
+              - name: Mount cinder's image conversion NFS share
+                vars:
+                  image_conversion_nfs_share: {get_param: CinderImageConversionNfsShare}
+                  image_conversion_nfs_options: {get_param: CinderImageConversionNfsOptions}
+                mount:
+                  path: *cinder_image_conversion_nfs_dir
+                  state: mounted
+                  fstype: nfs4
+                  src: "{{ image_conversion_nfs_share }}"
+                  opts: "{{ image_conversion_nfs_options }}"
           - name: cinder_enable_iscsi_backend fact
             set_fact:
               cinder_enable_iscsi_backend: {if: [cinder_iscsi_backend_enabled, true, false]}
@@ -294,6 +336,14 @@ outputs:
                   enabled: yes
                   daemon_reload: yes
 
+  cinder_volume_config_settings:
+    description: Config settings for the cinder-volume container (HA or non-HA)
+    value:
+      if:
+        - cinder_nfs_conversion_dir_enabled
+        - cinder::image_conversion_dir: *cinder_image_conversion_nfs_dir
+        - {}
+
   cinder_volume_volumes:
     description: Volumes for the cinder-volume container (HA or non-HA)
     value:
@@ -321,6 +371,15 @@ outputs:
           - - /etc/multipath:/etc/multipath:z
             - /etc/multipath.conf:/etc/multipath.conf:ro
           - []
+        - if:
+          - cinder_nfs_conversion_dir_enabled
+          - - str_replace:
+                # Use slave propagation so if the mount is delayed on the host
+                # it will also be updated within the cinder-volume container.
+                template: DIR:DIR:slave
+                params:
+                  DIR: *cinder_image_conversion_nfs_dir
+          - []
 
   cinder_volume_environment:
     description: Docker environment for the cinder-volume container (HA or non-HA)
diff --git a/deployment/cinder/cinder-volume-container-puppet.yaml b/deployment/cinder/cinder-volume-container-puppet.yaml
index 21641549d4..4518a4f8b8 100644
--- a/deployment/cinder/cinder-volume-container-puppet.yaml
+++ b/deployment/cinder/cinder-volume-container-puppet.yaml
@@ -218,8 +218,9 @@ outputs:
       config_settings:
         map_merge:
           - get_attr: [CinderBase, role_data, config_settings]
+          - get_attr: [CinderCommon, cinder_volume_config_settings]
           - tripleo::profile::base::lvm::enable_udev: false
-          - tripleo::profile::base::cinder::volume::cinder_enable_iscsi_backend: {get_param: CinderEnableIscsiBackend}
+            tripleo::profile::base::cinder::volume::cinder_enable_iscsi_backend: {get_param: CinderEnableIscsiBackend}
             tripleo::profile::base::cinder::volume::cinder_enable_nfs_backend: {get_param: CinderEnableNfsBackend}
             tripleo::profile::base::cinder::volume::cinder_enable_rbd_backend: {get_param: CinderEnableRbdBackend}
             tripleo::profile::base::cinder::volume::cinder_volume_cluster: {get_param: CinderVolumeCluster}
diff --git a/releasenotes/notes/cinder-nfs-conversion-dir-ba9b8dce515808ce.yaml b/releasenotes/notes/cinder-nfs-conversion-dir-ba9b8dce515808ce.yaml
new file mode 100644
index 0000000000..700374122a
--- /dev/null
+++ b/releasenotes/notes/cinder-nfs-conversion-dir-ba9b8dce515808ce.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    The following parameters add support for mounting Cinder's image
+    conversion directory on an external NFS share.
+
+    * CinderImageConversionNfsShare
+    * CinderImageConversionNfsOptions