Add backups for mariadb nightly like we do for postgres.

This allows us to back up /backups and get a good few days database
dumps on mariadb servers.

roles/mariadb_server/files/backup-database

@@ -0,0 +1,10 @@
+#!/bin/bash
+# Backup a database *locally* to /backups/.
+
+DB=$1
+
+# Make our latest backup
+/bin/mysqldump --add-drop-database $DB | /usr/bin/xz > /backups/$DB-$(date +%F).dump.xz
+
+# Also, delete the backup from a few days ago.
+rm -f /backups/$DB-$(date --date="3 days ago" +%F).dump.xz

roles/mariadb_server/tasks/main.yml

@@ -27,4 +27,23 @@
 - name: create .my.cnf file for future logins
   template: src=dotmy.cnf.j2 dest=/root/.my.cnf owner=root group=root mode=0700
 
+- name: Ensure mariadb has a place to backup to
+  file: dest=/backups state=directory owner=mysql
+  tags:
+  - mariadb-server
 
+- name: Copy over backup scriplet
+  copy: src=backup-database dest=/usr/local/bin/backup-database mode=0755
+  tags:
+  - mariadb-server
+
+- name: Set up some cronjobs to backup databases as configured
+  template: >
+    src=cron-backup-database
+    dest=/etc/cron.d/cron-backup-database-{{ item }}
+  with_items:
+  - "{{ dbs_to_backup }}"
+  when: dbs_to_backup != []
+  tags:
+  - cron
+  - mariadb-server

roles/mariadb_server/templates/cron-backup-database

@@ -0,0 +1 @@
+0 0 * * * mysql /usr/local/bin/backup-database {{ item }}