---
- name: "Uninstall xtrabackup utility (switched to mariabackup)"
  apt:
    name: percona-xtrabackup
    state: absent

- name: "Remove tuning configuration file which is now merged with galera.cnf"
  file:
    path: /etc/mysql/conf.d/tuning.cnf
    state: absent

- name: "Check if the galera config already exists"
  stat:
    path: /etc/mysql/conf.d/galera.cnf
  register: galera_cnf

- name: "Configure /etc/mysql/conf.d/galera.cnf"
  template:
    src: galera.cnf.j2
    dest: /etc/mysql/conf.d/galera.cnf
    owner: root
    group: mysql
    mode: 0640
  tags:
    - config

# TODO Check if we want this back or done in some other way.
# It's safer to not be meddling with starting and stopping galera
# nodes on subsequent runs. Registering in a file that the
# initialization has been executed might already do the trick.
#
#- name: "Check if the node is safe for galera bootstrapping"
#  shell: "egrep -s -q '^ *safe_to_bootstrap *: *1 *$' /var/lib/mysql/grastate.dat"
#  register: grastate
#  failed_when: grastate.rc not in [0, 1, 2]
#  when: is_primary
#
#  # state 0 = grastate.dat file exists and it contains "safe_to_bootstrap: 1"
#  # state 1 = grastate.dat file exists, but it does not contain "safe_to_bootstrap: 1"
#  # state 2 = grastate.dat file does not yet exist, this is a new node
#- name: "Stop mysql service on primary node, prior to bootstrapping galera"
#  service:
#    name: mariadb
#    state: stopped
#  when: is_primary and grastate.rc in [0, 2]
#
#- name: "Bootstrap galera on primary node"
#  shell: galera_new_cluster
#  when: is_primary and grastate.rc in [0, 2]
#
#- name: "Restart mysql service on secondary node"
#  service:
#    name: mariadb
#    state: restarted
#  when: not is_primary

- name: "Create galera-haproxy user (for checking node health)"
  mysql_user:
    name: galera-haproxy
    host: "%"

- name: "Restart mysql server (only on initial install)"
  service:
    name: mariadb
    state: restarted
  when: not galera_cnf.stat.exists