Show if an Update Is Available and Exit

[mritzmann]

Is your feature request related to a problem?

I would like to use a system monitoring tool to check whether a Nextcloud update is available or not. The monitoring tool can execute commands per SSH, but there is no suitable endpoint/script/command which can be used to check for updates.

See also: https://help.nextcloud.com/t/monitor-whether-updates-are-available/143537

Describe the solution you'd like

A new option for updater.phar:

• --only-check: Show if an update is available and exit

Exit codes:

• Exit 0: OK - There is no update
• Exit 1: Warning - There is an update available

Exit codes optional:

• Exit 2: Critical - The update is urgent
• Exit 3: Unknown - Something failed

(More information about these exit codes and their meaning can be found at the Icinga documentation. The common nagios plugins use the same exit codes to distinguish between ok, warning, critical and unknown.)

[joshtrichards]

Update availability monitoring functionality was recently added to the serverinfo monitoring endpoint in nextcloud/serverinfo#434

[joshtrichards]

Closing as being implemented via the monitoring endpoint in nextcloud/serverinfo#434.

https://github.com/nextcloud/serverinfo/

Feel free to re-open, with an explanation, if using the monitoring endpoint for this functionality doesn't meet your needs.