sg-test.tf

resource "openstack_networking_network_v2" "test-net" {
  name = "test-net"
}
resource "openstack_networking_subnet_v2" "test-subnet" {
  name ="test-subnet"
  network_id = "${openstack_networking_network_v2.test-net.id}"
  cidr = "10.1.2.0/24"
}

resource "openstack_networking_port_v2" "test-port" {
  name = "test-port"
  network_id = "${openstack_networking_network_v2.test-net.id}"
  admin_state_up = "true"
  fixed_ip {
    subnet_id = "${openstack_networking_subnet_v2.test-subnet.id}" 
  }
  fixed_ip {
    subnet_id = "${openstack_networking_subnet_v2.test-subnet.id}"
  }
}

resource "openstack_compute_instance_v2" "test-instance" {
  name = "test-instance"
  image_name = "centos-7-1601"
  flavor_name = "m1.small"
  security_groups = ["default", "terraform-test", "terraform-test2"]
  
  network {
    port = "${openstack_networking_port_v2.test-port.id}"
  }
}