Check fs-inodes

Overview

Checks the percentage of inode space used. To do this, this plugin fetches a list of local devices that are in use and have a filesystem on them. Filesystems that do not report inode usage (e.g. btrfs) are skipped.

If you get an alert, use find $MOUNT -xdev -printf ‚%hn‘ | sort | uniq –count | sort –key=1 –numeric-sort –reverse | head -n 10 to find where inodes are being used. This finds the 10 directories under $MOUNT that have the most files inside them.

Fact Sheet

Fact

Value

Check Plugin Download

https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/fs-inodes

Check Interval Recommendation

Once a minute

Can be called without parameters

Yes

Compiled for Windows

No

Help

usage: fs-inodes [-h] [-V] [--always-ok] [-c CRIT] [-w WARN]

Checks the percentage of inode space used. To do this, this plugin fetches a
list of local devices that are in use and have a filesystem on them.
Filesystems that do not report inode usage are skipped.

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  Set the critical threshold inode usage percentage.
                       Default: 95
  -w, --warning WARN   Set the warning threshold inode usage percentage.
                       Default: 90

Usage Examples

./fs-inodes --warning 90 --critical 95

Output:

/ 1.7%, /tmp 3.2%, /boot 0.2%

States

  • WARN or CRIT if inode usage is above a given threshold.

Perfdata / Metrics

For each mount:

  • inode usage (%)

Credits, License