Looking for a way to check mount point is mounted and is writeable

matthes138 · 11-11-2011, 12:08 PM

Looking for a way to check a mount point is mounted and is writable and if not remount the mount point. For some reason this mount point will become unavailable to write too and when the script runs, to copy files to the mount point it fails.
In the fstab it is listed as
/dev/sdc1 /mnt/iscsi ext3 _netdev 0 0
this has worked fine for a couple of years but now it will get lost for some reason?
And if I umount and mount the device again it will work for a while?

I need to write a shell script to monitor a Linux mount point on Linux. Basically, this is what I want the script to do:

* check if the mount point is there; if yes, do nothing

* if no, try to mount it again
I can put this into a cron job to run ever so often

Thanks for any help.

Any help would be great!!!

unSpawn · 11-11-2011, 12:40 PM

Quote:

Originally Posted by matthes138

Looking for a way to check a mount point is mounted (..) For some reason this mount point will become unavailable (..) this has worked fine for a couple of years but now it will get lost for some reason? And if I umount and mount the device again it will work for a while?

IMHO looking for a 'if iscsiadm sez status umounted || mount' fix is like treating symptoms. As it worked before you should review system changes, check system and daemon logs for clues, maybe run in the iscsi daemon debug mode, monitor network conditions, etc, etc to find the actual cause.

digitaldude · 01-03-2012, 12:56 AM

use "monit" to check whether a device is mounted or not.

This is how it'll be:

Code:

check filesystem datafs with path /dev/sdb1
       group server
       start program  = "/bin/mount /data"
       stop program  =  "/bin/umount /data"
       if failed permission 660 then unmonitor
       if failed uid root then unmonitor
       if failed gid disk then unmonitor
       if space usage > 80 % then alert
       if space usage > 94 % then stop
       if inode usage > 80 % then alert
       if inode usage > 94 % then stop
       alert root@localhost