Merge branch 'restart-failed-backups' into 'master'

Restart failed backups (fixes #270)

Closes #270

See merge request !288

roles/borg_client/files/borg-backup-offsite.service

+[Unit]
+Description=Borg backup (offsite)
+
+[Service]
+Type=oneshot
+Restart=on-failure
+RestartSec=5m
+ExecStart=/usr/local/bin/borg-backup-offsite.sh

roles/borg_client/files/borg-backup.service

+[Unit]
+Description=Borg backup
+Wants=borg-backup-offsite.service
+Before=borg-backup-offsite.service
+
+[Service]
+Type=oneshot
+Restart=on-failure
+RestartSec=5m
+ExecStart=/usr/local/bin/borg-backup.sh

roles/borg_client/tasks/main.yml

@@ -58,10 +58,11 @@
   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
+  copy: src={{ item }} dest=/etc/systemd/system/{{ item }} owner=root group=root mode=0644
   with_items:
     - borg-backup.timer
     - borg-backup.service
+    - borg-backup-offsite.service
 
 - name: activate systemd timers for backup
   systemd: name=borg-backup.timer enabled=yes state=started daemon-reload=yes

roles/borg_client/templates/borg-backup.service.j2

-[Unit]
-Description=Borg backup
-
-[Service]
-Type=oneshot
-{% for backup in backup_hosts %}
-ExecStart=/usr/local/bin/borg-backup{{ backup['suffix'] }}.sh
-{% endfor %}