diff --git a/ansible/group_vars/all/kolla b/ansible/group_vars/all/kolla
index ae336a80f..80cc3564f 100644
--- a/ansible/group_vars/all/kolla
+++ b/ansible/group_vars/all/kolla
@@ -62,7 +62,7 @@ kolla_install_type: "binary"
 kolla_docker_namespace: "kolla"
 
 # Url of docker registry to use for Kolla images.
-kolla_docker_registry:
+kolla_docker_registry: "{{ docker_registry }}"
 
 # Username to use to access a docker registry.
 kolla_docker_registry_username:
diff --git a/releasenotes/notes/kolla-docker-registry-e1adce280fc17db7.yaml b/releasenotes/notes/kolla-docker-registry-e1adce280fc17db7.yaml
new file mode 100644
index 000000000..6be86a14c
--- /dev/null
+++ b/releasenotes/notes/kolla-docker-registry-e1adce280fc17db7.yaml
@@ -0,0 +1,7 @@
+---
+upgrade:
+  - |
+    Modifies the default value of ``kolla_docker_registry`` variable to the
+    value of the ``docker_registry`` variable. The default value of
+    ``docker_registry`` is unset. This avoids needing to set the same value in
+    two places when a private Docker registry is in use.