Monitoring a group of processes

[Werner Flamme]

Kevin Alford schrieb am 14.12.05 14:37:
> I am running nagios 2.0b5 on Fedora core 3.  I wanted to know if it is
> capable of monitoring a group of processes?
> An example is smbd and nmbd.  You need both of them to be running for
> Samba to be operational.  I can use the command
> /usr/local/nagios/libexec/check_procs -C smbd to see that the smbd
> processes are running, and I can do the same thing
> For nmbd, but how do I look at them together?  This is just an example.
> I am using this to monitor the project specific
> Application we run, but it involves multiple processes.  I would like to
> monitor each process, and report on the application 
> Being up as a whole.  Your assistance in this matter is greatly
> appreciated.
>  
> 
> 
> Kevin D. Alford

Kevin,

I used check_smb.sh (from the contrib dir in the nagios-plugins package) 
and modified a bit. Maybe you can do so too. The modified script runs on 
SuSE Linux Enterprise Server.

I had some definitions at the beginning:
BINGREP=`which grep`
BINPS=`which ps`
BINWC=`which wc`
# look if your ps supports the syntax - Solaris does not...
PSCOMMAND="$BINPS ax"
# we need an output with the name of the process, so you
# may adapt "ps ax" to what your system understands :-)

and then I modified the checks:
#
# No arguments.  Let's kick this pig.
#
# is smbd running? Count everything with "smbd" inside:
SMBDRUN=$($PSCOMMAND | $BINGREP smbd | wc -l)
# now we subtract "ps ax":
SMBDRUN=$[$SMBDRUN-1]

#
# Ok, now let's grab a count of nmbd processes.
#
NMBDRUN=$($PSCOMMAND | $BINGREP nmbd | wc -l)
# now we subtract "ps ax" again:
NMBDRUN=$[$NMBDRUN-1]

#
# now for the dismount.
#
#echo "Total Users:$total_users Total Files:$total_files"
echo "SMB-Procs: $SMBDRUN - NMB-Procs: $NMBDRUN"
# if any of NMBDRUN or SMBDRUN equals zero, ALLPROC will become zero too:
ALLPROC=$[$NMBDRUN*$SMBDRUN]

#
# let Nagios know that everything is ok - or not...
#
# either nmbd or smbd is (or both are) not running
if [ $ALLPROC -eq 0 ]; then
     exit $STATE_CRITICAL

# maybe you want to see a warning when there is only
# 1 smbd and 1 nmbd running? Then de-comment next 2 lines:
#elif [ $ALLPROC -lt 2 ]; then
#    exit $STATE_WARNING

# and in any other case I assume everything is OK...
else
     exit $STATE_OK
fi

So I fairly agree with Cal Evans: "Shamelessly stolen from other Nagios 
plugins."

HTH,
Werner

-- 
Werner Flamme, Abt. WKDV
UFZ Umweltforschungszentrum Leipzig-Halle GmbH
Permoserstr. 15, 04318 Leipzig
eMail: werner.flamme at ufz.de, Tel.: (0341) 235-2500






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