compute node module

nodes/main.tf

-variable "image_compute" {default = "CentOS-7-x86_64-GenericCloud-1905"}
-variable "flavor" {default = "m1.medium"}
-variable "compute_node_count" {default = 2}
-variable "internal_net" {default = "clusternet"}
+variable "image_compute" {default = "string"}
+variable "flavor" {default = "string"}
+variable "compute_node_count" { }
+variable "internal_net" {default = "string"}
+variable "key_pair" {type = "string"}
 
 # creates compute node
 resource "openstack_compute_instance_v2" "c0" {
@@ -9,7 +10,7 @@ resource "openstack_compute_instance_v2" "c0" {
   name            = "c${count.index}"
   image_name      = var.image_compute
   flavor_name     = var.flavor
-  key_pair        = openstack_compute_keypair_v2.keypair.name
+  key_pair        = var.key_pair
   security_groups = ["default"]
   count           = var.compute_node_count