add cluster definition for gtws
diff --git a/salt/control/cluster/openstack_gateway_cluster.yml b/salt/control/cluster/openstack_gateway_cluster.yml
new file mode 100644
index 0000000..5d2a20a
--- /dev/null
+++ b/salt/control/cluster/openstack_gateway_cluster.yml
@@ -0,0 +1,26 @@
+parameters:
+  salt:
+    control:
+      size:
+        openstack.gateway:
+          cpu: 32
+          ram: 65536
+          disk_profile: small
+          net_profile: default
+      cluster:
+        internal:
+          domain: ${_param:cluster_domain}
+          engine: virt
+          node:
+            gtw01:
+              provider: kvm01.${_param:cluster_domain}
+              image: ${_param:salt_control_xenial_image}
+              size: openstack.gateway
+            gtw02:
+              provider: kvm01.${_param:cluster_domain}
+              image: ${_param:salt_control_xenial_image}
+              size: openstack.gateway
+            gtw03:
+              provider: kvm01.${_param:cluster_domain}
+              image: ${_param:salt_control_xenial_image}
+              size: openstack.gateway
diff --git a/salt/control/cluster/openstack_gateway_single.yml b/salt/control/cluster/openstack_gateway_single.yml
index c1a4588..1b30b6c 100644
--- a/salt/control/cluster/openstack_gateway_single.yml
+++ b/salt/control/cluster/openstack_gateway_single.yml
@@ -14,5 +14,5 @@
           node:
             gtw01:
               provider: kvm01.${_param:cluster_domain}
-              image: ${_param:salt_control_trusty_image}
+              image: ${_param:salt_control_xenial_image}
               size: openstack.gateway