Changed backup logic

roles/update-docker/tasks/main.yml

@@ -1,3 +1,9 @@
+- name: "start backup-docker-to-local.service"
+  systemd:
+    name: backup-docker-to-local.service
+    state: started
+  when: force_backup_before_update | bool
+
 - name: create {{update_docker_script}}
   copy:
     src: update-docker.py

roles/update-docker/templates/update-docker.service.j2

@@ -4,6 +4,5 @@ OnFailure=systemd-notifier@%n.service
 
 [Service]
 Type=oneshot
-{% if force_backup_before_update | bool %}ExecStartPre=/bin/sh -c 'systemctl start backup-docker-to-local.service'{% endif %}
 ExecStartPre=/bin/sh -c '/usr/bin/python {{ path_system_maintenance_service_freezer_script }} freeze {{ system_maintenance_services | join(' ')  }} --ignore {{system_maintenance_cleanup_services | join(' ') }} update-docker --timeout "{{system_maintenance_timeout_heal_docker}}"'
 ExecStart=/bin/sh -c '/usr/bin/python {{update_docker_script}} {{path_docker_compose_instances}} && systemctl start system-maintenance-service-defrost.service'