Automating a filesystem free-space check? 3

[krawz187]

Hello,

I'm pretty new to AIX. My company sent me out for training just a few weeks ago, after our senior AIX administrator left the company. In taking over his environment, I've run across quite a few maintenance related tasks that seem better suited for automation.

Case in point, I am asked to maintain the free-space of a certain filesystem, so that 1gig of free-space is always available. Manually checking filesystems every day is something that gets a little repetitive and feels like a waste of time. However, this is a mission-critical filesystem, that is running in a production environment, so I need to stay on top of it.

I'm wondering if any of you AIX veterans out there, know a way to create a script and/or job to monitor the free-space of a filesystem, and report back to me when it is approaching a "danger" level of free-space, if you will. My first thought was some kind of solution incorporating a similar logic to something like.. : df -k /filesystemX |grep filesystemX .... and here is where I get lost. Perhaps sending the output to something like "awk" to find the number before the % sign showing free-space remaining, and then sending those results via sendmail at intervals of the day...but anyway, I don't have the technical know-how yet to set this up myself.

Any opinions or ideas would be greatly appreciated!

Kind regards,
Justin

 

[RodKnowlton]

#!/bin/ksh

FILESYSTEM="/mountpoint/of/filesystem"
FREESPACE=$(df -Pk ${FILESYSTEM} | awk '$4 ~ /[0-9]+/{print $4}')

if [ ${FREESPACE} -lt 1048576 ]
then
echo "Filesystem free space: ${FREESPACE}"       | mail -c root -s "Low space warning: ${FILESYSTEM}" krawz187
fi

cron as desired. (man cron;man crontab)

Rod Knowlton
IBM Certified Advanced Technical Expert pSeries and AIX 5L

 

[spamly]

Nice script Rod! (As always!)

You could also add a couple of lines for this script to look at all of your filesystems:

#!/bin/ksh


FILESYSTEMS="/ /usr /var /export"
for FILESYSTEM in $FILESYSTEMS
do
  FREESPACE=$(df -Pk ${FILESYSTEM} | awk '$4 ~ /[0-9]+/{print $4}')
  if [ ${FREESPACE} -lt 1048576 ]
  then
  echo "Filesystem free space: ${FREESPACE}"         | mail -c root -s "Low space warning: ${FILESYSTEM}" krawz187
  fi
done

 

[krawz187]

Excellent! Looking forward to trying this in the morning Thanks a bunch for the quick response.

 

[jprabaker]

You could have a look at Big Brother monitoring software(from

http://bb4.com).

It monitors things like disk space & network connections and be configured to email & send page alerts.

Perhaps overkill for monitoring one filesystem on one server, but if you look after multiple machines its well worth a look.

 

[letis]

hello,

more simply (?), you have a graphical and free tool shipped with AIX, called RSCT. You define triggers (related to CPU usage, free space on filesystem, or whatever you want - there are hundred of parameters to monitor), and you then define a response (send snmp trap, send a mail, launch a program, etc etc). This tool is accessible from WebSM, a graphical administration tool installed automatically with any system having a graphical screen.

Just type
wsm
from a graphical screen, and play a bit with it. The interface is rather nice (looks like Tivoli IT Director).

regards,

 

[RodKnowlton]

FYI, to save a futile search on an older system:

RSCT was added to the base operating system with AIX 5L 5.0.

Rod Knowlton
IBM Certified Advanced Technical Expert pSeries and AIX 5L