diff --git a/playbooks/roles/cronjob/tasks/main.yml b/playbooks/roles/cronjob/tasks/main.yml
index 11c40c2..bb21cc0 100644
--- a/playbooks/roles/cronjob/tasks/main.yml
+++ b/playbooks/roles/cronjob/tasks/main.yml
@@ -1,5 +1,5 @@
 - name: backup old crontab
-  shell: crontab -l > ~/backup.cron
+  shell: crontab -l > ~/backup.cron  2> /dev/null || true
 
 - name: copy image-clean script
   copy:
diff --git a/playbooks/roles/swarm-manage/templates/swarm-agent.service.j2 b/playbooks/roles/swarm-manage/templates/swarm-agent.service.j2
index 953d05e..06ba5a2 100644
--- a/playbooks/roles/swarm-manage/templates/swarm-agent.service.j2
+++ b/playbooks/roles/swarm-manage/templates/swarm-agent.service.j2
@@ -12,6 +12,7 @@ ExecStart=/usr/bin/docker run \
           --addr={{ node_ip }}:{{ docker_port }} \
           etcd://{{ node_ip }}:{{ etcd_client_port }}/lain/swarm
 ExecStop=/bin/bash -c '/usr/bin/docker stop %n || true'
+Restart=on-failure
 
 [Install]
 WantedBy=multi-user.target