[Xymon] Ignoring file system when two "/" (root partitions) are reported

[Bill Arlofski]

> On 09/13/11 14:40, Larry Barber wrote:
>> Could you insert a "grep -v rootfs" in the 'df' section of
>> xymonclient-linus.sh?

Hi Larry... Just a follow-up:

This quick fix solution did work, however there are two things to consider here:

First, it needs to be done manually on every single client which reports the
rootfs and /dev/root devices.


And second, and even more important is that Interestingly enough, the
$EXCLUDES variable manually evaluates to include '-x rootfs'  so it should
ALREADY be excluded in the df command and the "grep -v rootfs" should not be
necessary.

See below:


When run manually the rootfs is not included in the output of the df command:

Get EXCLUDES:
$ cat /proc/filesystems | grep nodev | awk '{print $2}' | xargs echo \
| sed -e 's! ! -x !g'

returns: (on one line of course)
sysfs -x rootfs -x bdev -x proc -x tmpfs -x debugfs -x sockfs -x pipefs -x
anon_inodefs -x rpc_pipefs -x devpts -x ramfs -x hugetlbfs -x nfs -x nfsd -x
autofs -x mqueue -x vmblock


Notice that -x rootfs is in that list

so appending that list to the df command where the $EXCLUDES variable would be
evaluated like so:

df -Pl -x iso9660 -x sysfs -x rootfs -x bdev -x proc -x tmpfs -x debugfs -x
sockfs -x usbfs -x pipefs -x anon_inodefs -x rpc_pipefs -x devpts -x ramfs -x
hugetlbfs -x nfs -x nfs4 -x nfsd -x autofs

I get:

Filesystem         1024-blocks      Used Available Capacity Mounted on
/dev/root             30336296  20486696   8308568      72% /
/dev/hda1               241116     97737    130931      43% /boot
/dev/mapper/VolGroup0-Opt   5242716    698268   4544448      14% /opt
(and a few others that are properly reported but would wrap horribly here)


Where a straight forward df -Pl of course shows the rootfs filesystem:

$ df -Pl
Filesystem         1024-blocks      Used Available Capacity Mounted on
rootfs                30336296  20486884   8308380      72% /
/dev/root             30336296  20486884   8308380      72% /
rc-svcdir                 1024       136       888      14% /lib64/rc/init.d
udev                     10240       188     10052       2% /dev
shm                    2032040         0   2032040       0% /dev/shm
/dev/hda1               241116     97737    130931      43% /boot
/dev/mapper/VolGroup0-Opt   5242716    698268   4544448      14% /opt
(and a few others that are properly reported but would wrap horribly here)


Perhaps when the $EXCLUDES variable is evaluated by xymon, it does not propery
include the "-x rootfs" entry in the list, BUT the manual output listed above
is the same on two machines when run as any normal user or the xymon user so I
am not sure where the breakdown is...


--
Bill Arlofski
Reverse Polarity, LLC
http://www.revpol.com/