Customize host root volume size by Terrafrom provisioning (#4239)

* print hostnames (#5110)

Terrafrom - customize hosts root volume size

disable block_device by default value

Terraform formatting fix

Fixed typos

* fix resources after rebase

* Fix glusterfs image issue

contrib/terraform/openstack/kubespray.tf

@@ -41,6 +41,11 @@ module "compute" {
   number_of_bastions                           = "${var.number_of_bastions}"
   number_of_k8s_nodes_no_floating_ip           = "${var.number_of_k8s_nodes_no_floating_ip}"
   number_of_gfs_nodes_no_floating_ip           = "${var.number_of_gfs_nodes_no_floating_ip}"
+  bastion_root_volume_size_in_gb               = "${var.bastion_root_volume_size_in_gb}"
+  etcd_root_volume_size_in_gb                  = "${var.etcd_root_volume_size_in_gb}"
+  master_root_volume_size_in_gb                = "${var.master_root_volume_size_in_gb}"
+  node_root_volume_size_in_gb                  = "${var.node_root_volume_size_in_gb}"
+  gfs_root_volume_size_in_gb                   = "${var.gfs_root_volume_size_in_gb}"
   gfs_volume_size_in_gb                        = "${var.gfs_volume_size_in_gb}"
   public_key_path                              = "${var.public_key_path}"
   image                                        = "${var.image}"

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

@@ -22,6 +22,16 @@ variable "number_of_bastions" {}
 
 variable "number_of_gfs_nodes_no_floating_ip" {}
 
+variable "bastion_root_volume_size_in_gb" {}
+
+variable "etcd_root_volume_size_in_gb" {}
+
+variable "master_root_volume_size_in_gb" {}
+
+variable "node_root_volume_size_in_gb" {}
+
+variable "gfs_root_volume_size_in_gb" {}
+
 variable "gfs_volume_size_in_gb" {}
 
 variable "public_key_path" {}

contrib/terraform/openstack/variables.tf

@@ -44,6 +44,26 @@ variable "number_of_gfs_nodes_no_floating_ip" {
   default = 0
 }
 
+variable "bastion_root_volume_size_in_gb" {
+  default = 0
+}
+
+variable "etcd_root_volume_size_in_gb" {
+  default = 0
+}
+
+variable "master_root_volume_size_in_gb" {
+  default = 0
+}
+
+variable "node_root_volume_size_in_gb" {
+  default = 0
+}
+
+variable "gfs_root_volume_size_in_gb" {
+  default = 0
+}
+
 variable "gfs_volume_size_in_gb" {
   default = 75
 }
@@ -55,12 +75,12 @@ variable "public_key_path" {
 
 variable "image" {
   description = "the image to use"
-  default     = "ubuntu-14.04"
+  default     = ""
 }
 
 variable "image_gfs" {
   description = "Glance image to use for GlusterFS"
-  default     = "ubuntu-16.04"
+  default     = ""
 }
 
 variable "ssh_user" {