diff --git a/cluster/openstack-heat/config-default.sh b/cluster/openstack-heat/config-default.sh
index 03442d97307..8f1bb6ff0f0 100644
--- a/cluster/openstack-heat/config-default.sh
+++ b/cluster/openstack-heat/config-default.sh
@@ -17,7 +17,7 @@
 ## Contains configuration values for the Openstack cluster
 
 # Stack name
-STACK_NAME=${STACK_NAME:-KubernetesStack}
+STACK_NAME=${STACK_NAME:-kube-stack}
 
 # Keypair for kubernetes stack
 KUBERNETES_KEYPAIR_NAME=${KUBERNETES_KEYPAIR_NAME:-kubernetes_keypair}
diff --git a/cluster/openstack-heat/kubernetes-heat/kubeminion.yaml b/cluster/openstack-heat/kubernetes-heat/kubeminion.yaml
index 10c1b76e97d..0d4f0712db8 100644
--- a/cluster/openstack-heat/kubernetes-heat/kubeminion.yaml
+++ b/cluster/openstack-heat/kubernetes-heat/kubeminion.yaml
@@ -251,6 +251,7 @@ resources:
   server_name_post_fix:
     type: OS::Heat::RandomString
     properties:
+      character_classes: [{'class': 'lowercase', 'min': 1}]
       length: 8
 
   kube_minion: