monitor filesystems and notify @

kopper27 · 01-13-2010, 09:04 AM

hi guys

I need to monitor my filesystems and get an email when the status is warning >=80 and critical >=90.
I am not very good for scripting so I found an script but is not working for me

This Red Hat Enterprise 5.0

Script

Code:

ADMIN="me@somewher.com"
# set alert level 90% is default
ALERT=90
df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
  #echo $output
  usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
  partition=$(echo $output | awk '{ print $2 }' )
  if [ $usep -ge $ALERT ]; then
    echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" |
     mail -s "Alert: Almost out of disk space $usep" $ADMIN
  fi
done

I am getting these errors

Code:

./test: line 9: [: /dev/mapper/VolGroup00-root: integer expression expected
./test: line 9: [: /: integer expression expected
./test: line 9: [: /dev/mapper/VolGroup00-var: integer expression expected
./test: line 9: [: /var: integer expression expected

now this is my df -h command

Code:

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-root
                      120G   20G   94G  18% /
/dev/sda1              99M   12M   83M  12% /boot
tmpfs                 1.7G     0  1.7G   0% /dev/shm
/dev/mapper/VolGroup00-var
                      9.7G  1.3G  7.9G  15% /var

any idea what could be causing that and how to fix it?

or maybe someone has a better script?

thanks a lot

Tinkster · 01-13-2010, 12:16 PM

Use "df -HP" to begin with, so you get all output for one volume
on one line ....

kopper27 · 01-13-2010, 01:06 PM

thanks a but now I get no output from the script

./script and nothing comes up

what could be?

Tinkster · 01-13-2010, 01:25 PM

Maybe the fact that none of the disks are full?

Tinkster · 01-13-2010, 01:36 PM

Btw, you could significantly shorten the script

Code:

ALERT=90
df -HP | awk '!/^Filesystem|tmpfs|cdrom/ { print gensub( /%/, "", "1",$5) " " $1 }' | while read usep partition
do
  if [ $usep -ge $ALERT ]; then
    echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" | mail -s "Alert: Almost out of disk space $usep" $ADMIN
  fi
done

kopper27 · 01-13-2010, 04:03 PM

looks like that's the thing...

now I get this

Code:

You must specify direct recipients with -s, -c, or -b.

I am testing the script with a server with a filesystem 85%

Tinkster · 01-13-2010, 04:09 PM

Ooops ... if you copied my version:
the definition of ADMIN="yadda@blah.org" is missing.

Plus you may have to play with \" around the subject,
but that's untested.

kopper27 · 01-20-2010, 03:32 PM

hi again

This what I have sorry I did not use your code
looks like it working what I don't know (feel very stupid for it)
how to test it using email do I need a SMTP Server or what?

if someone can test it

basically it has 2 type of messages WARNING and ALERT

Code:

ADMIN="karlo@yahoo.com"
# set alert level 90% is default
WARNING=70
ALERT=85
df -HP | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
  #echo $output
  usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
  partition=$(echo $output | awk '{ print $2 }' )
  if [ $usep -ge $WARNING ] && [ $usep -lt $ALERT ]; then
  echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)"
  fi
  if [ $usep -ge $ALERT ]; then
    echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" #|
    # mail -s "Alert: Almost out of disk space $usep" $ADMIN
  fi
done

chrism01 · 01-20-2010, 04:47 PM

You'll need to ensure sendmail (or equiv) is running . A mail server is pretty std as the system frequently talks to itself. You can check by logging in as root and running

mailx

at the cmd line.
There should be a few msgs there.

Note that by default sendmail is installed to only listen to localhost(127.0.0.1).
If you want it to listen to other systems, amend

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')

to

dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

in /etc/mail/sendmail.mc & restart it ('service sendmail restart' iirc).

kopper27 · 01-21-2010, 10:13 AM

let me see If I got this

from this

Code:

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')

to this

Code:

dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

or

Code:

DAEMON_OPTIONS(`Port=smtp,Name=MTA')dnl

that's it? I don't need to specify an SMTP Server?
my question is because as you see above the script I will be running
once it finds a problem will have to send me an email ton my external @ kopper27@xxxxx.com

thanks

thanks a lot

chrism01 · 01-21-2010, 05:14 PM

You only need to worry about that if you want to accept incoming emails to this machine from other systems. Outgoing is not a problem.
You can use

ps -ef|grep sendmail

to see if it's running. That edit is only relevant to sendmail; other MTAs have different cfgs.

kopper27 · 01-22-2010, 08:44 AM

Quote:

Originally Posted by chrism01

You only need to worry about that if you want to accept incoming emails to this machine from other systems. Outgoing is not a problem.
You can use

ps -ef|grep sendmail

to see if it's running. That edit is only relevant to sendmail; other MTAs have different cfgs.

so you mean I only need the sendmail up and running(no configuration at all) and if it has internet connection it will send me an email to my kopper27@xxxxx.com

mmm If I got it correctly that would be cool