remove kube-node from master node by default

contrib/terraform/openstack/modules/compute/main.tf

@@ -107,7 +107,7 @@ resource "openstack_compute_instance_v2" "k8s_master" {
 
   metadata = {
     ssh_user         = "${var.ssh_user}"
-    kubespray_groups = "etcd,kube-master,kube-node,k8s-cluster,vault"
+    kubespray_groups = "etcd,kube-master,k8s-cluster,vault"
     depends_on       = "${var.network_id}"
   }
 
@@ -130,7 +130,7 @@ resource "openstack_compute_instance_v2" "k8s_master_no_etcd" {
 
   metadata = {
     ssh_user         = "${var.ssh_user}"
-    kubespray_groups = "kube-master,kube-node,k8s-cluster,vault"
+    kubespray_groups = "kube-master,k8s-cluster,vault"
     depends_on       = "${var.network_id}"
   }
 
@@ -175,7 +175,7 @@ resource "openstack_compute_instance_v2" "k8s_master_no_floating_ip" {
 
   metadata = {
     ssh_user         = "${var.ssh_user}"
-    kubespray_groups = "etcd,kube-master,kube-node,k8s-cluster,vault,no-floating"
+    kubespray_groups = "etcd,kube-master,k8s-cluster,vault,no-floating"
     depends_on       = "${var.network_id}"
   }
 
@@ -198,7 +198,7 @@ resource "openstack_compute_instance_v2" "k8s_master_no_floating_ip_no_etcd" {
 
   metadata = {
     ssh_user         = "${var.ssh_user}"
-    kubespray_groups = "kube-master,kube-node,k8s-cluster,vault,no-floating"
+    kubespray_groups = "kube-master,k8s-cluster,vault,no-floating"
     depends_on       = "${var.network_id}"
   }