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Check nextcloud-app-updates

Overview

Checks a Nextcloud installation for available app updates from the configured app store and alerts when an app update has been available for longer than the warning threshold (default: 72 hours). The grace period avoids alerting during maintenance windows where updates are applied promptly. Only enabled apps are listed and checked; disabled apps are ignored. The threshold is configurable. Requires root or sudo.

Important Notes:

  • Must run on the Nextcloud server itself to access the installation directory
  • Queries the Nextcloud app store, so the server needs outbound access to it
  • The "pending since" age is measured by the plugin across runs. The first time an app update appears, its clock starts; alerting only kicks in once the update has been available longer than the threshold. A different available version restarts the clock.

Data Collection:

  • Requires sudo permissions for the UID under which the Nextcloud application runs
  • Runs Nextcloud occ app:update --showonly via sudo to list apps with a pending update
  • Runs Nextcloud occ app:list via sudo to list every enabled app with its installed version
  • Stores the first-seen timestamp of each pending update in a local SQLite database to measure how long it has been available
  • Apps can be limited with --match and excluded with --ignore

Fact Sheet

Fact Value
Check Plugin Download https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/nextcloud-app-updates
Nagios/Icinga Check Name check_nextcloud_app_updates
Check Interval Recommendation Every day
Can be called without parameters Yes
Runs on Cross-platform
Compiled for Windows No
Uses SQLite DBs $TEMP/linuxfabrik-monitoring-plugins-cache.db

Help

usage: nextcloud-app-updates [-h] [-V] [--always-ok] [-c CRIT]
                             [--ignore IGNORE] [--match MATCH] [--path PATH]
                             [--test TEST] [-v] [-w WARN]

Checks a Nextcloud installation for available app updates from the configured
app store and alerts when an app update has been available for longer than the
warning threshold (default: 72 hours). The grace period avoids alerting during
maintenance windows where updates are applied promptly. Only enabled apps are
listed and checked; disabled apps are ignored. The threshold is configurable.
Requires root or sudo.

options:
  -h, --help           show this help message and exit
  -V, --version        show program's version number and exit
  --always-ok          Always returns OK.
  -c, --critical CRIT  CRIT threshold for how long an app update may stay
                       available, in hours. Supports Nagios ranges. Default:
                       no critical threshold
  --ignore IGNORE      Ignore apps whose app id matches this Python regular
                       expression. Case-sensitive by default; use `(?i)` for
                       case-insensitive matching. Can be specified multiple
                       times.
  --match MATCH        Only check apps whose app id matches this Python
                       regular expression. Case-sensitive by default; use
                       `(?i)` for case-insensitive matching. Can be specified
                       multiple times.
  --path PATH          Local path to the Nextcloud installation, typically the
                       web server document root. Default:
                       /var/www/html/nextcloud
  --test TEST          For unit tests. Needs "path-to-stdout-file,path-to-
                       stderr-file,expected-retc".
  -v, --verbose        Makes this plugin verbose during the operation. Useful
                       for debugging and seeing what is going on under the
                       hood.
  -w, --warning WARN   WARN threshold for how long an app update may stay
                       available, in hours. Supports Nagios ranges. Default:
                       72

Usage Examples

./nextcloud-app-updates --path=/var/www/html/nextcloud --warning=72 --critical=168

Output:

1 of 2 app update(s) pending longer than allowed [WARNING]

App      ! Installed ! Available ! Status
---------+-----------+-----------+----------
calendar ! 5.0.0     ! 5.0.1     ! [WARNING]
contacts ! 5.9.0     ! 6.0.0     ! [OK]
files    ! 2.0.0     ! -         ! [OK]

With --verbose, the occ commands the plugin runs are appended to the output:

Executed occ commands:
  /var/www/html/nextcloud/occ app:update --showonly
  /var/www/html/nextcloud/occ app:list --output=json

States

  • OK if no app update is available, or if every available update is still within the warning grace period.
  • WARN if an app update has been available for longer than --warning hours.
  • CRIT if an app update has been available for longer than --critical hours (no critical threshold by default).
  • UNKNOWN if the Nextcloud occ command cannot be run.
  • --always-ok suppresses all alerts and always returns OK.

Perfdata / Metrics

Name Type Description
active Number Number of enabled apps checked (after --match/--ignore filtering).
overdue Number Number of available app updates that exceed the threshold.
pending Number Number of available app updates.

Troubleshooting

occ command not found

Error running sudo -u \#48 /var/www/html/nextcloud/occ app:update --showonly: rc=1 sudo: /var/www/html/nextcloud/occ: command not found

Permission for /var/www/html/nextcloud/occ must be 0755.

Credits, License