diff --git a/etc/kolla/globals.yml b/etc/kolla/globals.yml
index 0ca120a477..475bbc9e23 100644
--- a/etc/kolla/globals.yml
+++ b/etc/kolla/globals.yml
@@ -16,6 +16,9 @@
 # Valid options are [ binary, source ]
 #kolla_install_type: "binary"
 
+# Valid option is Docker repository tag
+#openstack_release: "3.0.0"
+
 # This should be a VIP, an unused IP on your network that will float between
 # the hosts running keepalived for high-availability. When running an All-In-One
 # without haproxy and keepalived, this should be the first IP on your