Backup gitlab with gitlab-backup tool

Use Gitlab's official backup tool for dumping the database, git
repositories and other data with a wrapper script similiar to the
postgres and mysql backup scripts.
Signed-off-by: Jelle van der Waa <jelle@archlinux.org>

roles/borg-client/tasks/main.yml

@@ -53,6 +53,10 @@
   file: path={{ mysql_backup_dir }} state=directory owner=root group=root
   when: mysql_backup_dir is defined
 
+- name: install gitlab backup script
+  template: src=backup-gitlab.sh.j2 dest=/usr/local/bin/backup-gitlab.sh owner=root group=root mode=0755
+  when: inventory_hostname == "gitlab.archlinux.org"
+
 - name: install systemd timer and service for backup
   template: src={{ item }}.j2 dest=/etc/systemd/system/{{ item }} owner=root group=root mode=0644
   with_items:

roles/borg-client/templates/backup-gitlab.sh.j2

+#!/bin/bash
+#
+# Script to backup Gitlab running in a Docker container
+#
+# https://docs.gitlab.com/omnibus/settings/backups.html#creating-backups-for-gitlab-instances-in-docker-containers
+#
+
+backupdir="{{ gitlab_backupdir }}"
+
+echo "emptying backup directory ${backupdir}"
+
+# Verify that the gitlab_backupdir in ansible was defined, otherwise we will rm /* and remove the previous backup
+rm -r "${backupdir:?backup dir unset}/"*
+
+docker exec gitlab gitlab-backup create SKIP=tar

roles/borg-client/templates/borg-backup.sh.j2

@@ -49,6 +49,10 @@ if systemctl is-active mysqld || systemctl is-active mariadb; then
     /usr/local/bin/backup-mysql.sh || true
 fi
 
+{% if inventory_hostname == "gitlab.archlinux.org" %}
+systemctl is-active docker && /usr/local/bin/backup-gitlab.sh
+{% endif %}
+
 borg create -v --stats -C lz4 \
     -e /proc \
     -e /sys \
@@ -58,9 +62,16 @@ borg create -v --stats -C lz4 \
     -e /var/cache \
     -e /var/lib/archbuild \
     -e /var/lib/archbuilddest \
+    -e /var/lib/docker \
+    -e "$backup_mountdir/proc" \
+    -e "$backup_mountdir/sys" \
+    -e "$backup_mountdir/dev" \
+    -e "$backup_mountdir/run" \
+    -e "$backup_mountdir/tmp" \
     -e "$backup_mountdir/var/cache" \
     -e "$backup_mountdir/var/lib/archbuild" \
     -e "$backup_mountdir/var/lib/archbuilddest" \
+    -e "$backup_mountdir/var/lib/docker" \
     -e "$backup_mountdir/srv/archive" \
     {{ item['host'] }}:{{ item['dir'] }}::$(date "+%Y%m%d-%H%M%S") "$backup_mountdir"
 borg prune -v {{ item['host'] }}:{{ item['dir'] }} --keep-daily=7 --keep-weekly=4 --keep-monthly=6

roles/gitlab/defaults/main.yml

+gitlab_backupdir: /srv/gitlab/data/backups