kolla-ansible/ansible/roles/nova/tasks/precheck.yml

---
- name: Get container facts
  kolla_container_facts:
    name:
      - nova_api
      - nova_novncproxy
      - nova_serialproxy
      - nova_spicehtml5proxy
      - nova_ssh
      - nova_libvirt
  register: container_facts

- name: Checking available compute nodes in inventory
  vars:
    nova_compute_ironic: "{{ nova_services['nova-compute-ironic'] }}"
  fail:
    msg: >
      At least 1 compute node required in inventory when ironic is disabled.      
  when:
    - groups['compute'] | length < 1
    - not nova_compute_ironic.enabled | bool

- name: Checking free port for Nova API
  vars:
    nova_api: "{{ nova_services['nova-api'] }}"
  wait_for:
    host: "{{ api_interface_address }}"
    port: "{{ nova_api_listen_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['nova_api'] is not defined
    - inventory_hostname in groups[nova_api.group]
    - nova_api.enabled | bool

- name: Checking free port for Nova Metadata
  vars:
    nova_api: "{{ nova_services['nova-api'] }}"
  wait_for:
    host: "{{ api_interface_address }}"
    port: "{{ nova_metadata_listen_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['nova_api'] is not defined
    - inventory_hostname in groups[nova_api.group]
    - nova_api.enabled | bool

- name: Checking free port for Nova NoVNC Proxy
  vars:
    nova_novncproxy: "{{ nova_services['nova-novncproxy'] }}"
  wait_for:
    host: "{{ api_interface_address }}"
    port: "{{ nova_novncproxy_listen_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['nova_novncproxy'] is not defined
    - nova_novncproxy.enabled | bool
    - inventory_hostname in groups[nova_novncproxy.group]

- name: Checking free port for Nova Serial Proxy
  vars:
    nova_serialproxy: "{{ nova_services['nova-serialproxy'] }}"
  wait_for:
    host: "{{ api_interface_address }}"
    port: "{{ nova_serialproxy_listen_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['nova_serialproxy'] is not defined
    - nova_serialproxy.enabled | bool
    - inventory_hostname in groups[nova_serialproxy.group]

- name: Checking free port for Nova Spice HTML5 Proxy
  vars:
    nova_spicehtml5proxy: "{{ nova_services['nova-spicehtml5proxy'] }}"
  wait_for:
    host: "{{ api_interface_address }}"
    port: "{{ nova_spicehtml5proxy_listen_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['nova_spicehtml5proxy'] is not defined
    - nova_spicehtml5proxy.enabled | bool
    - inventory_hostname in groups[nova_spicehtml5proxy.group]

- name: Checking free port for Nova SSH
  vars:
    nova_ssh: "{{ nova_services['nova-ssh'] }}"
  wait_for:
    host: "{{ migration_interface_address }}"
    port: "{{ nova_ssh_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['nova_ssh'] is not defined
    - nova_ssh.enabled | bool
    - inventory_hostname in groups[nova_ssh.group]

- name: Checking free port for Nova Libvirt
  vars:
    nova_libvirt: "{{ nova_services['nova-libvirt'] }}"
  wait_for:
    host: "{{ api_interface_address }}"
    port: "{{ nova_libvirt_port }}"
    connect_timeout: 1
    timeout: 1
    state: stopped
  when:
    - container_facts['nova_libvirt'] is not defined
    - nova_libvirt.enabled | bool
    - inventory_hostname in groups[nova_libvirt.group]

- name: Checking that libvirt is not running
  vars:
    nova_libvirt: "{{ nova_services['nova-libvirt'] }}"
  stat: path=/var/run/libvirt/libvirt-sock
  register: result
  failed_when: result.stat.exists
  when:
    - nova_compute_virt_type in ['kvm', 'qemu']
    - container_facts['nova_libvirt'] is not defined
    - inventory_hostname in groups[nova_libvirt.group]