Check disk-usage
Overview
Measures the usage of all mounted disk partitions on physical disks only (e.g. hard disks, CD-ROM drives, USB keys) found. It does not check the usage on the raw disks, because for example in LVM more than one disk can be a member of a logical volume, and some of the disks might be full - which is ok as long as the LVM has some space available. The check also ignores all other partition types (e.g. memory partitions such as /dev/shm).
Bemerkung
UNIX usually reserves 5% of the total disk space for the root user. total and used fields on UNIX refer to the overall total and used space, whereas free represents the space available for the user and percent represents the user utilization. That is why percent value may look 5% bigger than what you would expect it to be (starting with psutil v4.3.0; quote from the psutil documentation).
Fact Sheet
Check Plugin Download |
https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/disk-usage |
Check Interval Recommendation |
Every 5 minutes |
Can be called without parameters |
Yes |
Compiled for |
Linux, Windows |
3rd Party Python modules |
|
Help
usage: disk-usage [-h] [-V] [--always-ok] [-c CRIT]
[--exclude-pattern EXCLUDE_PATTERN]
[--exclude-regex EXCLUDE_REGEX]
[--include-pattern INCLUDE_PATTERN]
[--include-regex INCLUDE_REGEX] [-w WARN]
Checks the used disk space, for each partition.
options:
-h, --help show this help message and exit
-V, --version show program's version number and exit
--always-ok Always returns OK.
-c CRIT, --critical CRIT
Critical threshold, of the form
"<number>[unit][method]", where unit is one of
`%|K|M|G|T|P` and method is one of `USED|FREE`. If
"unit" is omitted, `%` is assumed. `K` means
`kibibyte` etc. If "method" is omitted, `USED` is
assumed. `USED` means "number ore more", `FREE` means
"number or less". Examples: `95` = alert at 95% usage
or more. `9.5M` = alert when 9.5 MiB or more is used.
Other self-explanatory examples are `95%USED`,
`5%FREE`, `9.5GFREE`, `1400GUSED`. Default: 95%USED
--exclude-pattern EXCLUDE_PATTERN
Any line matching this pattern (case-insensitive) will
count as a exclude. The mountpoint is excluded if it
contains the specified value. Example: "boot" excludes
"/boot" as well as "/boot/efi". Can be specified
multiple times. On Windows, use drive letters without
backslash ("Y:" or "Y"). Includes are matched before
excludes.
--exclude-regex EXCLUDE_REGEX
Any line matching this python regex (case-insensitive)
will count as a exclude. Can be specified multiple
times. On Windows, use drive letters without backslash
("Y:" or "Y"). Includes are matched before excludes.
--include-pattern INCLUDE_PATTERN
Any line matching this pattern (case-insensitive) will
count as a include. The mountpoint is included if it
contains the specified value. Example: "boot" includes
"/boot" as well as "/boot/efi". Can be specified
multiple times. On Windows, use drive letters without
backslash ("Y:" or "Y"). Includes are matched before
excludes.
--include-regex INCLUDE_REGEX
Any line matching this python regex (case-insensitive)
will count as a include. Can be specified multiple
times. On Windows, use drive letters without backslash
("Y:" or "Y"). Includes are matched before excludes.
-w WARN, --warning WARN
Warning threshold, of the form
"<number>[unit][method]", where unit is one of
`%|K|M|G|T|P` and method is one of `USED|FREE`. If
"unit" is omitted, `%` is assumed. `K` means
`kibibyte` etc. If "method" is omitted, `USED` is
assumed. `USED` means "number ore more", `FREE` means
"number or less". Examples: `95` = alert at 95% usage.
`9.5M` = alert when 9.5 MiB is used. Other self-
explanatory examples are `95%USED`, `5%FREE`,
`9.5GFREE`, `1400GUSED`. Default: 90%USED
Usage Examples
Simple usage:
./disk-usage
Output:
Everything is ok. (warn=90%USED crit=95%USED)
Mountpoint ! Type ! Size ! Used ! Avail ! Use%
---------------+------+-----------+----------+----------+-------
/ ! xfs ! 4.0GiB ! 2.4GiB ! 1.5GiB ! 61.4%
/boot ! xfs ! 1014.0MiB ! 287.1MiB ! 726.9MiB ! 28.3%
/var ! xfs ! 4.0GiB ! 1.4GiB ! 2.6GiB ! 34.4%
/tmp ! xfs ! 1014.0MiB ! 39.5MiB ! 974.5MiB ! 3.9%
/var/log ! xfs ! 1014.0MiB ! 190.9MiB ! 823.1MiB ! 18.8%
/var/tmp ! xfs ! 1014.0MiB ! 39.4MiB ! 974.6MiB ! 3.9%
/var/log/audit ! xfs ! 506.7MiB ! 63.9MiB ! 442.7MiB ! 12.6%
/home ! xfs ! 1014.0MiB ! 130.1MiB ! 883.9MiB ! 12.8%
For each /var partition, except /var/tmp, alert when any of these partitions has only 450 MiB of free space left:
./disk-usage --include-pattern=var --exclude-pattern=tmp --critical 450MFREE
Output:
There are critical errors. (warn=90%USED crit=450MFREE)
Mountpoint ! Type ! Size ! Used ! Avail ! Use%
---------------+------+-----------+----------+----------+------------------
/var ! xfs ! 4.0GiB ! 1.4GiB ! 2.6GiB ! 34.4%
/var/log ! xfs ! 1014.0MiB ! 190.9MiB ! 823.1MiB ! 18.8%
/var/log/audit ! xfs ! 506.7MiB ! 64.2MiB ! 442.5MiB ! 12.7% [CRITICAL]|
Check exactly one partition:
./disk-usage --include-pattern=audit --warning 60MUSED
Output:
/var/log/audit 12.6% [WARNING] - total: 506.7MiB, free: 442.7MiB, used: 63.9MiB (warn=60MUSED crit=95%USED)
Some other examples:
./disk-usage --exclude-pattern=/var/log --exclude-pattern=/tmp --warning=80 --critical=90
./disk-usage --exclude-pattern=/var/log --exclude-pattern=/tmp --warning=80%USED --critical=90%USED
./disk-usage --exclude-pattern=/var/log --exclude-pattern=/tmp --warning=80%USED --critical=3GFREE
# on Windows:
./disk-usage --exclude-pattern=E: --exclude-pattern=Y: --warning=80 --critical=90
States
WARN or CRIT if disk usage in percent is above a given threshold.
Perfdata / Metrics
Name |
Type |
Description |
|---|---|---|
<mountpoint>-percent |
Percentage |
Usage in percent |
<mountpoint>-total |
Bytes |
Total Disksize |
<mountpoint>-usage |
Bytes |
Usage in Bytes |
Credits, License
Authors: Linuxfabrik GmbH, Zurich
License: The Unlicense, see LICENSE file.