openstack-ansible/playbooks/common-playbooks/nova.yml

---
# Copyright 2014, Rackspace US, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

- name: Install nova services
  hosts: "{{ nova_hosts }}"
  serial: "{{ nova_serial }}"
  gather_facts: "{{ osa_gather_facts | default(True) }}"
  user: root
  environment: "{{ deployment_environment_variables | default({}) }}"
  vars_files:
    - ../defaults/repo_packages/nova_consoles.yml
  tags:
    - nova
  pre_tasks:
    # Enable execution of ceph_client on the nova compute hosts if cinder RBD
    # backends are used. This is necessary to ensure that volume-backed Nova
    # instances can function when RBD is the volume backend.
    - name: Set cinder RBD inuse fact
      set_fact:
        nova_cinder_rbd_inuse: "{{ True in groups['cinder_volume'] | map('extract', hostvars, 'cinder_backend_rbd_inuse') }}"
      delegate_to: localhost
      delegate_facts: True
      when:
        - "'nova_compute' in group_names"
        - "inventory_hostname == ((groups['nova_compute'] | intersect(ansible_play_hosts)) | list)[0]"
        - "hostvars['localhost']['nova_cinder_rbd_inuse'] is not defined"
      tags:
        - always

    # In order to ensure that any container, software or
    # config file changes which causes a container/service
    # restart do not cause an unexpected outage, we drain
    # the load balancer back end for this container.
    - include: ../common-tasks/haproxy-endpoint-manage.yml
      vars:
        haproxy_backend: "{{ item }}-back"
        haproxy_state: disabled
      when:
        - "item in group_names"
        - "groups[item] | length > 1"
      with_items:
        - "nova_api_metadata"
        - "nova_api_os_compute"
        - "nova_api_placement"
        - "nova_console"

    - name: Determine management bridge IP address
      include: ../common-tasks/dynamic-address-fact.yml
      vars:
        network_address: "management_address"

    - name: Configure container
      include: "../common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"
      vars:
        extra_container_config_no_restart:
          - "lxc.start.order=39"

    - name: Configure log directories (on metal)
      include: ../common-tasks/os-log-dir-setup.yml
      vars:
        log_dirs:
          - src: "/openstack/log/{{ inventory_hostname }}-nova"
            dest: "/var/log/nova"

    - include: ../common-tasks/unbound-clients.yml
      static: no
      when:
        - hostvars['localhost']['resolvconf_enabled'] | bool

    - name: Add nbd devices to the compute
      shell: |
        for i in /dev/nbd*;do
          lxc-device -n {{ container_name }} add $i $i
        done        
      failed_when: false
      register: device_add
      changed_when: >
        'added' in device_add.stdout.lower()        
      delegate_to: "{{ physical_host }}"
      when:
        - container_tech | default('lxc') == 'lxc'
        - "'nova_compute' in group_names"
        - "not is_metal | bool"
      tags:
        - always

    - name: Add net/tun device to the compute
      command: |
        lxc-device -n {{ container_name }} add /dev/net/tun /dev/net/tun        
      delegate_to: "{{ physical_host }}"
      when:
        - container_tech | default('lxc') == 'lxc'
        - "'nova_compute' in group_names"
        - "not is_metal | bool"
      tags:
        - always

    - name: Check if kvm device exists
      stat:
        path: /dev/kvm
      delegate_to: "{{ physical_host }}"
      register: kvm_device
      when:
        - container_tech | default('lxc') == 'lxc'
        - "'nova_compute' in group_names"
        - "not is_metal | bool"
      tags:
        - always

    - name: Add kvm device to the compute
      command: |
        lxc-device -n {{ container_name }} add /dev/kvm /dev/kvm        
      delegate_to: "{{ physical_host }}"
      register: device_add
      failed_when: false
      changed_when: >
        'added' in device_add.stdout.lower()        
      when:
        - container_tech | default('lxc') == 'lxc'
        - "'nova_compute' in group_names"
        - "not is_metal | bool"
        - "'ischr' in kvm_device.stat and kvm_device.stat.ischr | bool"
      tags:
        - always

  roles:
    - role: "os_nova"
      nova_novncproxy_git_repo: "{{ openstack_repo_git_url }}/novnc"
      nova_novncproxy_git_install_branch: "{{ novncproxy_git_install_branch }}"
      nova_spicehtml5_git_repo: "{{ openstack_repo_git_url }}/spice-html5"
      nova_spicehtml5_git_install_branch: "{{ spicehtml5_git_install_branch }}"
      nova_management_address: "{{ management_address }}"
      nova_cinder_rbd_inuse: "{{ hostvars['localhost']['nova_cinder_rbd_inuse'] }}"

    - role: "openstack_openrc"
      tags:
        - openrc

    - role: "rsyslog_client"
      rsyslog_client_log_rotate_file: nova_log_rotate
      rsyslog_client_log_dir: "/var/log/nova"
      rsyslog_client_config_name: "99-nova-rsyslog-client.conf"
      tags:
        - rsyslog

    - role: "system_crontab_coordination"
      tags:
        - crontab

  post_tasks:
    # Now that container changes are done, we can set
    # the load balancer back end for this container
    # to available again.
    - include: ../common-tasks/haproxy-endpoint-manage.yml
      vars:
        haproxy_backend: "{{ item }}-back"
        haproxy_state: enabled
      when:
        - "item in group_names"
        - "groups[item] | length > 1"
      with_items:
        - "nova_api_metadata"
        - "nova_api_os_compute"
        - "nova_api_placement"
        - "nova_console"