check_disk

[Hugo van der Kooij]

On Wed, 20 Dec 2006, Matthias wrote:

> i am wondering about the output of the check_disk plugins:
> on the ext3 partition is 38% of inodes used:
>
> # df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda2             9.2G  3.3G  5.5G  38% /

That will be disk blocks, not inodes (See the df manual page)

> but the check_disk plugins says the parttion has less than 5% inodes
> free:
>
> # /usr/lib/nagios/plugins/check_disk --icritical=5% -p  /;echo $?
> DISK CRITICAL - free space: / 5568 MB (62% inode=69%);| /
> =3343MB;-2147483648;-2147483648;0;9388
> 2

The help page seems to indicate this is a check on free space. But it 
seems to act more like used space. But a quick check here seems to 
indicate it is not doing any sane check on inodes at all.

Regardless of how I run it I see some bogus values in the output:

$ /usr/lib/nagios/plugins/check_disk -K 99% -p /var
DISK OK - free space: /var 52274 MB (82% inode=98%);| /var=10724MB;-2147483648;-2147483648;0;66370

So I think it is safe to assume the plugin is in fact broken. But unless 
you have a very specific application capable of creating loads of tiny 
files on your system you are unlikely to run out of inodes.

Hugo.

-- 
 	hvdkooij at vanderkooij.org	http://hvdkooij.xs4all.nl/
 	    This message is using 100% recycled electrons.

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