topic Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason in Operating System - HP-UX

how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alexander_101 — Mon, 11 Apr 2005 10:05:22 GMT

Hi all,

i have installed a product (NNM) on my HP-UX machine. Is there any way my HP-UX to monitor some daemons - nnm daemons an start them over if some of them get down ?

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

RAC_1 — Mon, 11 Apr 2005 10:08:23 GMT

UNIX95= ps -C"daemon_name" || "start_program"

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Geoff Wild — Mon, 11 Apr 2005 11:10:59 GMT

How about - install MC/ServiceGuard.

Though Anil's way should work...

Rgds...Geoff

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alex Lavrov. — Mon, 11 Apr 2005 13:53:44 GMT

We wrote script that has configuration file with values to check with ps and how many instances there should be. It runs every 5 minutes in crontab and if the process is down or there are not enough instances of it, it starts the program with the line that is also written in the config file.

Not complicated at all.

About ServiceGuard, I'll say it's a bit expensive solution for a such small problem :)

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Bill Hassell — Mon, 11 Apr 2005 21:57:50 GMT

If NNM daemons are stopping, you need to get the latest patches. NNM is not cheap and the required programs (daemons) should never disappear. Install the current patches for your HP-UX system and the latest patches for NNM.

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alexander_101 — Tue, 12 Apr 2005 01:35:25 GMT

Hello Bill,

I think, this is not such a bad idea !

Now my question is how to determine which patches/updates do i need ?? they are hundrets !

I need some sort of "service guard", because there are some additional thinks i need to be always UP and running (vncserver for example), what happens if I'm not at the office and something goes wrong ?

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alexander_101 — Tue, 12 Apr 2005 01:37:20 GMT

Hi Alex,

sounds intresting, but i can't do ANY programing/scripting, if you can help me a bit ??

or at least give me some links to reed about it ??

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alex Lavrov. — Tue, 12 Apr 2005 01:53:25 GMT

Hey, I'll give guidelines for this script:

conf file (example):

test.prog:5:/usr/bin/test.prog

script (in crontab, runs let's say every 5 minutes):

cat conf.file | while read line
do

grep_line=`echo $line | awk -F : '{print $1}'`
num=`echo $line | awk -F : '{print $2}'`
command_line=`echo $line | awk -F : '{print $3}'`

num_procs=`ps -ef | grep test.prog | grep -v grep | wc -l`

if [ $num_procs -lt $num ]
then
# exeute the program with command_line
# may be send an email to someone that the process is down
fi

Well, it's just a skeleton, that gives the general idea of the script. I checks every line and gets the info it need to check the process and how to execute it if the number of instances is less than it should be.

There are ofcourse more scripting to do, may be send an email, of more complex checks, bt this is the direction.

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alexander_101 — Tue, 12 Apr 2005 01:56:02 GMT

Bill, don't bother, i found the latest patch bundle for my hp-ux

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alexander_101 — Tue, 12 Apr 2005 02:56:57 GMT

thanks Alex,

sounds a little complicated... i'll desipher it ;)

Re: how to monitor some daemons/programs and automaticaly make them up if they go down for some reason

Alexander_101 — Tue, 12 Apr 2005 08:11:02 GMT

http://cr.yp.to/ <- daemontools

It's free and it's nice !