add_server.yml

---

 - hosts: 127.0.0.1
   connection: local
   vars_files:
    - vars/credentials.yml
   gather_facts: False
   tasks:

    - name: launch server
      nova_compute:
        state: present
        auth_url: "{{ auth_url }}"
        login_username: "{{ login_username }}"
        login_password: "{{ login_password }}"
        login_tenant_name: "{{ login_tenant_name }}"
        name: "{{ servername }}"
        image_id: b6f54599-47e2-43b6-aa02-880a93a5b5a1
        wait_for: 200
        flavor_id: 101
        nics:
          - net-id: 472dd2d5-e163-4d71-899c-f0c7a10ad10d
        meta:
          hostname: web-extra
          group: "{{ servername }}"
      register: result

    - name: add new server to inventory
      lineinfile: 
        state=present
        dest=inventory 
        insertafter=EOF
        line="{{ servername }}   ansible_ssh_host={{ result.private_ip }}"
      when: result|changed

    - name: Add webserver to in-memory inventory 
      add_host:
        name: "{{ servername }}"
        groups: webfarm
        ansible_ssh_host: "{{ result.private_ip }}"
      when: result|changed
 
 - hosts: loadbalancer
   gather_facts: False
   tasks:

    - name: set haproxy template with new server
      template:
        src=haproxy.cfg.j2
        dest=/etc/haproxy/haproxy.cfg
      register: result

    - name: reload haproxy
      service:
        name=haproxy
        state=reloaded
      when: result|changed