Graceful Shutdown¶

Before updating an Output Engine server in cluster mode, the server has to be shutdowned gracefully. This way, the checkin services are closed for new jobs and the router is forced to send these jobs to another server. After closing the checkin services, wait for the system to become empty and then execute the update as described in Update.

Closing the Checkin Services¶

Find the envconsul processes calling the checkin services by typing:

systemctl list-units --all | grep -e 'checkin'

Example - command output snippet

seal-checkin.service                                                                loaded    active     running      LPR entrance for PLOSSYS 5.
seal-ipp-checkin.service                                                            loaded    inactive   dead         IPP entrance for PLOSSYS 5.

To each of the found checkin services, send a SIGTERM signal:
```
sudo systemctl stop <service>
```
The systemd daemon waits for a maximum of 90 seconds for the service to stop voluntarily, after that, the service will be killed.
Example - calls for the checkin services listed above
```
sudo systemctl stop seal-checkin
sudo systemctl stop seal-ipp-checkin
```