diff --git a/manifests/profile/base/nova/compute_libvirt_shared.pp b/manifests/profile/base/nova/compute_libvirt_shared.pp
index c89e69f04..d341f3bb0 100644
--- a/manifests/profile/base/nova/compute_libvirt_shared.pp
+++ b/manifests/profile/base/nova/compute_libvirt_shared.pp
@@ -38,8 +38,9 @@ class tripleo::profile::base::nova::compute_libvirt_shared (
 ) {
   if $step >= 4 {
     # Ceph + Libvirt
-    $rbd_ephemeral_storage = hiera('nova::compute::rbd::ephemeral_storage', false)
+    $rbd_ephemeral_storage  = hiera('nova::compute::rbd::ephemeral_storage', false)
     $rbd_persistent_storage = hiera('rbd_persistent_storage', false)
+    $rbd_disk_cachemodes    = hiera('rbd_disk_cachemodes', ['network=writeback'])
     if $rbd_ephemeral_storage or $rbd_persistent_storage {
       include nova::compute::rbd
       exec{ "exec-setfacl-${nova_rbd_client_name}-nova":
@@ -56,7 +57,7 @@ class tripleo::profile::base::nova::compute_libvirt_shared (
 
     if $rbd_ephemeral_storage {
       class { 'nova::compute::libvirt':
-        disk_cachemodes => ['network=writeback'],
+        disk_cachemodes => $rbd_disk_cachemodes,
         hw_disk_discard => 'unmap',
       }
     } else {
diff --git a/releasenotes/notes/rbd-disk-cache-modes-b6b75fa2e52b8915.yaml b/releasenotes/notes/rbd-disk-cache-modes-b6b75fa2e52b8915.yaml
new file mode 100644
index 000000000..6b8b19ea5
--- /dev/null
+++ b/releasenotes/notes/rbd-disk-cache-modes-b6b75fa2e52b8915.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    New hiera setting `rbd_disk_cachemodes` allows to override
+    the disk cache modes for RBD. Defaults to ['network=writeback'].