Change dependecy from instance block to port block.

main.tf

@@ -127,6 +127,7 @@ resource "openstack_compute_floatingip_associate_v2" "ohpc" {
 
 #Create a port
 resource "openstack_networking_port_v2" "port_c0" {
+  depends_on = ["openstack_networking_subnet_v2.clustersubnet",]
   name           = "port_c0"
   network_id     = "${openstack_networking_network_v2.clusternet.id}"
   admin_state_up = "true"
@@ -134,7 +135,6 @@ resource "openstack_networking_port_v2" "port_c0" {
 
 #create a compute node
 resource "openstack_compute_instance_v2" "c0" {
-depends_on = ["openstack_networking_subnet_v2.clustersubnet"]
   name            = "c0"
   image_name      = "${var.image}"
   flavor_name     = "${var.flavor}"