Terraform .tf file to create a single VM in OpenStack

ruby_hw.tf

# Create a Virtual Machine

# For OpenStack, as with Digital Ocean, access credentials are needed
# They can be provided in a fashion similar to DO, passed as variables
# or via the terraform CLI as parameters, but they also can be passed
# as environment variables.  The standard "openrc.sh" file includes
# all the prerequisite parameters including OS_AUTH_URL, OS_PASSWORD
# OS_USERNAME, OS_TENANT_NAME, and OS_REGION_NAME.  The simplest is
# often to source the openrc file to set these variables, or set them
# in the provdier as follows:

#provider "openstack" {
#    user_name  = "admin"
#    tenant_name = "admin"
#    password  = "pwd"
#    auth_url  = "http://myauthurl:5000/v2.0"
#}

resource "openstack_compute_instance_v2" "ruby-os" {
  name = "ruby-os.opsits.com"
  image_id = "7f85f7b3-eb20-4bef-8bad-bb3583a9a2fd"
  flavor_id = "3"
  key_pair = "rhs"
  provisioner "local-exec" {
     command = "echo ${openstack_compute_instance_v2.ruby-os.access_ip_v4} ansible_connection=ssh ansible_ssh_user=centos >> inventory"
  }
}