add az_list_node variable to specify different AZs for kubelets (#5413)

* rebase and add az_list_node variable to specify different AZs for kubelets

* fix missing variable name change

contrib/terraform/openstack/kubespray.tf

@@ -32,6 +32,7 @@ module "compute" {
 
   cluster_name                                 = "${var.cluster_name}"
   az_list                                      = "${var.az_list}"
+  az_list_node                                 = "${var.az_list_node}"
   number_of_k8s_masters                        = "${var.number_of_k8s_masters}"
   number_of_k8s_masters_no_etcd                = "${var.number_of_k8s_masters_no_etcd}"
   number_of_etcd                               = "${var.number_of_etcd}"

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

@@ -546,7 +546,7 @@ resource "openstack_compute_instance_v2" "k8s_master_no_floating_ip_no_etcd_cust
 resource "openstack_compute_instance_v2" "k8s_node" {
   name              = "${var.cluster_name}-k8s-node-${count.index+1}"
   count             = "${var.node_root_volume_size_in_gb == 0 ? var.number_of_k8s_nodes : 0}"
-  availability_zone = "${element(var.az_list, count.index)}"
+  availability_zone = "${element(var.az_list_node, count.index)}"
   image_name        = "${var.image}"
   flavor_id         = "${var.flavor_k8s_node}"
   key_pair          = "${openstack_compute_keypair_v2.k8s.name}"
@@ -581,7 +581,7 @@ resource "openstack_compute_instance_v2" "k8s_node" {
 resource "openstack_compute_instance_v2" "k8s_node_custom_volume_size" {
   name              = "${var.cluster_name}-k8s-node-${count.index+1}"
   count             = "${var.node_root_volume_size_in_gb > 0 ? var.number_of_k8s_nodes : 0}"
-  availability_zone = "${element(var.az_list, count.index)}"
+  availability_zone = "${element(var.az_list_node, count.index)}"
   image_name        = "${var.image}"
   flavor_id         = "${var.flavor_k8s_node}"
   key_pair          = "${openstack_compute_keypair_v2.k8s.name}"
@@ -625,7 +625,7 @@ resource "openstack_compute_instance_v2" "k8s_node_custom_volume_size" {
 resource "openstack_compute_instance_v2" "k8s_node_no_floating_ip" {
   name              = "${var.cluster_name}-k8s-node-nf-${count.index+1}"
   count             = "${var.node_root_volume_size_in_gb == 0 ? var.number_of_k8s_nodes_no_floating_ip : 0}"
-  availability_zone = "${element(var.az_list, count.index)}"
+  availability_zone = "${element(var.az_list_node, count.index)}"
   image_name        = "${var.image}"
   flavor_id         = "${var.flavor_k8s_node}"
   key_pair          = "${openstack_compute_keypair_v2.k8s.name}"
@@ -656,7 +656,7 @@ resource "openstack_compute_instance_v2" "k8s_node_no_floating_ip" {
 resource "openstack_compute_instance_v2" "k8s_node_no_floating_ip_custom_volume_size" {
   name              = "${var.cluster_name}-k8s-node-nf-${count.index+1}"
   count             = "${var.node_root_volume_size_in_gb > 0 ? var.number_of_k8s_nodes_no_floating_ip : 0}"
-  availability_zone = "${element(var.az_list, count.index)}"
+  availability_zone = "${element(var.az_list_node, count.index)}"
   image_name        = "${var.image}"
   flavor_id         = "${var.flavor_k8s_node}"
   key_pair          = "${openstack_compute_keypair_v2.k8s.name}"

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

@@ -1,7 +1,11 @@
 variable "cluster_name" {}
 
 variable "az_list" {
-  type = "list"
+  type = list(string)
+}
+
+variable "az_list_node" {
+  type = list(string)
 }
 
 variable "number_of_k8s_masters" {}

contrib/terraform/openstack/variables.tf

@@ -3,8 +3,14 @@ variable "cluster_name" {
 }
 
 variable "az_list" {
-  description = "List of Availability Zones available in your OpenStack cluster"
-  type        = "list"
+  description = "List of Availability Zones to use for masters in your OpenStack cluster"
+  type        = list(string)
+  default     = ["nova"]
+}
+
+variable "az_list_node" {
+  description = "List of Availability Zones to use for nodes in your OpenStack cluster"
+  type        = list(string)
   default     = ["nova"]
 }