[Pkg-nagios-devel] Bug#800345: Bug#800345: check_disk sees wrong disk consumption on btrfs

[Jan Wagner]

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tags 800345 moreinfo
thanks

Hi Klaus,

thanks for taking the time to report your issue.

Am 28.09.15 um 09:46 schrieb Klaus Ethgen:
> Since several days, one of my checks went red for one of my boxes, 
> mentioned that / is 100% full. But this is not true, there is
> plenty of space left.
> 
> ~> df -Th Filesystem               Type      Size  Used Avail Use%
> Mounted on /dev/sda1                btrfs     502M  338M  169M  67%
> / ...
> 
> ~> btrfs fi df / System, single: total=4.00MiB, used=4.00KiB 
> Data+Metadata, single: total=497.81MiB, used=329.71MiB 
> GlobalReserve, single: total=8.00MiB, used=0.00B

I neither use btrfs nor do I have specific knowledge about this FS.

> ~> /usr/lib/nagios/plugins/check_disk -w '3%' -c '1%' DISK CRITICAL
> - free space: / 0 MB (0% inode=-)]; ...
> 
> ~> grep ' / ' /proc/mounts /dev/sda1 / btrfs
> rw,nodiratime,relatime,compress=zlib,ssd,discard,space_cache,autodefra
g
> 0 0
> 
> All other partitions worked well but it constantly shows / to be
> full.

I think you can get a bit more information about what happens behind
the scenes when running /usr/lib/nagios/plugins/check_disk -vvv

Maybe this can help understanding where it might fail.

Thanks, Jan.
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