openstack-ansible/playbooks/galera-install.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: Check galera cluster status
  hosts: galera_all
  max_fail_percentage: 0
  tasks:
    - name: Check if mysql is running
      command: /usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf ping
      ignore_errors: true
      register: mysql_running

    - fail:
        msg: "The cluster may be broken, mysql is not running but appears to be installed. Fix it before re-running the playbook or override with 'openstack-ansible -e galera_ignore_cluster_state=true galera-install.yml'."
      when:
        - not galera_ignore_cluster_state | bool
        - mysql_running.rc == 1
        - mysql_running.stderr | search("Check that mysqld is running and that the socket")

    - name: Gather mysql facts
      mysql_status_facts:
      ignore_errors: true

    - fail:
        msg: "The cluster may be broken, mysql is running but unable to gather mysql facts. Fix it before re-running the playbook or override with 'openstack-ansible -e galera_ignore_cluster_state=true galera-install.yml'."
      when:
        - not galera_ignore_cluster_state | bool
        - "{{ mysql_running.rc == 0 }}"
        - "{{ 'mysql_status' not in hostvars[inventory_hostname] }}"

    - fail:
        msg: "wsrep_incoming_addresses does not match across the cluster. Please fix before re-running the playbooks or override with 'openstack-ansible -e galera_ignore_cluster_state=true galera-install.yml'."
      with_items: "{{ play_hosts }}"
      when:
        - not galera_ignore_cluster_state | bool
        - "{{ mysql_running.rc == 0 }}"
        - "{{ hostvars[item]['mysql_running']['rc'] == 0 }}"
        - "{{ hostvars[inventory_hostname]['mysql_status']['wsrep_incoming_addresses'] != hostvars[item]['mysql_status']['wsrep_incoming_addresses'] }}"

    - set_fact:
        galera_existing_cluster: false

    - set_fact:
        galera_existing_cluster: true
      with_items: "{{ play_hosts }}"
      when: "{{ hostvars[item].mysql_running.rc == 0 }}"
  vars:
    galera_ignore_cluster_state: false
  tags:
    - discover-galera-cluster-state

- name: Install galera server
  hosts: galera_all
  serial: 1
  max_fail_percentage: 20
  user: root
  pre_tasks:
    - name: Galera extra lxc config
      lxc_container:
        name: "{{ container_name }}"
        container_command: |
          [[ ! -d "/var/lib/mysql" ]] && mkdir -p "/var/lib/mysql"
        container_config:
          - "lxc.mount.entry=/openstack/{{ container_name }} var/lib/mysql none bind 0 0"
      delegate_to: "{{ physical_host }}"
      when: is_metal == false or is_metal == "False"
      tags:
        - galera-mysql-dir
    - name: Flush net cache
      command: /usr/local/bin/lxc-system-manage flush-net-cache
      delegate_to: "{{ physical_host }}"
      tags:
        - flush-net-cache
    - name: Wait for container ssh
      wait_for:
        port: "22"
        delay: 5
        host: "{{ ansible_ssh_host }}"
      delegate_to: "{{ physical_host }}"
      tags:
        - galera-ssh-wait
  roles:
    - { role: "galera_server", tags: [ "galera-server" ] }
    - role: "rsyslog_client"
      rsyslog_client_log_dir: "/var/log/mysql_logs"
      rsyslog_client_log_files:
        - /var/log/mysql.log
        - /var/log/mysql.err
      rsyslog_client_config_name: "99-galera-rsyslog-client.conf"
      tags:
        - "galera-rsyslog-client"
        - "rsyslog-client"
    - role: "system_crontab_coordination"
      tags:
        - "system-crontab-coordination"
  vars:
    galera_wsrep_node_name: "{{ container_name }}"
    ansible_hostname: "{{ container_name }}"
    ansible_ssh_host: "{{ container_address }}"
    is_metal: "{{ properties.is_metal|default(false) }}"