Merge branch 'th/mysql-binlog' into 'master'

mysql: Add options to enable binlog

See merge request !8

mysql/defaults/main.yml

@@ -8,3 +8,6 @@ mysql_backup_user: "backup"
 mysql_backup_password: "{{ lookup('passwordstore', 'db/{{ ansible_hostname }}-mysql-backup create=true length=20') }}"
 
 mysql_rsnapshot: false
+# It is the admin’s responsibility to further configure binlogs, especially
+# purging them if required.
+mysql_enable_binlog: false

mysql/handlers/main.yml

+---
+
+- name: Reload systemd
+  systemd:
+    daemon_reload: true
+
+- name: Restart mariadb.service
+  systemd:
+    name: mariadb.service
+    state: restarted

mysql/tasks/main.yml

@@ -62,3 +62,22 @@
       file:
         path: /etc/cron.d/mysql-snapshot
         state: absent
+
+- name: Create mariadb.service override directory
+  file:
+    path: /etc/systemd/system/mariadb.service.d
+    state: directory
+    owner: root
+    group: root
+    mode: '0755'
+
+- name: Configure binlog
+  template:
+    src: override.conf
+    dest: /etc/systemd/system/mariadb.service.d/override.conf
+    owner: root
+    group: root
+    mode: '0644'
+  notify:
+    - Reload systemd
+    - Restart mariadb.service

mysql/templates/override.conf

+[Service]
+Environment=MYSQLD_OPTS={{ '--log-bin' if mysql_enable_binlog }}