deploy-gcp-instances.yml

- name: Create instance(s)
  hosts: localhost
  connection: local
  gather_facts: no
  tasks:
    - name: Launch instances
      gce:
         instance_names: "{{ item }}"
         machine_type: "{{ machine_type }}"
         image: "{{ image }}"
         service_account_email: "{{ service_account_email }}"
         credentials_file: "{{ credentials_file }}"
         project_id: "{{ project_id }}"
      register: gce
      with_items: "{{ instance_list }}"

    - name: Wait for SSH to come up
      wait_for: host={{ item.public_ip }} port=22 delay=10 timeout=60
      with_items: "{{ gce.results[0].instance_data }}"

    - name: Add host to web servers
      add_host: hostname={{ item.public_ip }} private_ip={{ item.private_ip }} groupname=web_servers
      with_items: "{{ gce.results[0].instance_data }}"

    - name: Add host to db servers
      add_host: hostname={{ item.public_ip }} private_ip={{ item.private_ip }} groupname=db_servers
      with_items: "{{ gce.results[1].instance_data }}"