Re: [Nagios-users] start a script automatically
Hi,
I just did this a few days ago using eventhandlers, I'll post my config
for your convenience, actually, it's dead easy:
this is the config of the service check:
define service{
use generic-service ; Name of
service template to use
host_name www..be
service_description HTTP_check_www.x.be_.5_interface
contact_groups solaris-admins
retry_check_interval3
event_handler restart_xxxweb
check_command check_webtest!xxx-5.scr!http://www.xxx.be interface
.5 via internet
}
the key here is the event_handler line. This 'function' is executed
whenever a state change occurs.
in checkcommands.cfg you must define this function:
define command{
command_namerestart_xxxweb
command_line
/usr/lib/nagios/plugins/eventhandlers/restart_xweb $SERVICESTATE$
$SERVICESTATETYPE$ $SERVICEATTEMPT$
}
This provides the link to the script that will be executed each time a
state change occurs.
below the contents of this script (I found it somewhere on a nagios
support site) and modified it slightly for my environment. As you will
see, I'm using the nagios client mechanism to restart the service on the
remote host.
#!/bin/sh
#
# Event handler script for restarting the web server on the local machine
#
# Note: This script will only restart the web server if the service is
# retried 3 times (in a soft state) or if the web service somehow
# manages to fall into a hard error state.
#
# What state is the HTTP service in?
case $1 in
OK)
# The service just came back up, so don't do anything...
;;
WARNING)
# We don't really care about warning states, since the service is
probably still running...
;;
UNKNOWN)
# We don't know what might be causing an unknown error, so don't
do anything...
;;
CRITICAL)
# Aha! The HTTP service appears to have a problem - perhaps we
should restart the server...
# Is this a soft or a hard state?
case $2 in
# We're in a soft state, meaning that Nagios is in the middle of
retrying the
# check before it turns into a hard state and contacts get
notified...
SOFT)
# What check attempt are we on? We don't want to restart
the web server on the first
# check, because it may just be a fluke!
case $3 in
# Wait until the check has been tried 3 times before
restarting the web server.
# If the check fails on the 4th time (after we restart the
web server), the state
# type will turn to hard and contacts will be notified
of the problem.
# Hopefully this will restart the web server successfully,
so the 4th check will
# result in a soft recovery. If that happens no one
gets notified because we
# fixed the problem!
1)
echo $(date): Dit is de eerste soft state voor
web, we herstarten de gateway /tmp/eventhandler_test
/usr/lib/nagios/plugins/check_nrpe -H
193.110.158.5 -c restart_xxxweb
;;
2)
echo $(date): Dit is de tweede soft state voor
xxxweb, we herstarten de gateway voor de 2e keer
/tmp/eventhandler_test
/usr/lib/nagios/plugins/check_nrpe -H
193.110.158.5 -c restart_xxxweb
;;
3)
echo $(date): Dit is de derde soft state voor
xxxweb, we herstarten de gateway voor de laatste maal, indien het nog niet
werkt is er iets goed fout /tmp/eventhandler_test
/usr/lib/nagios/plugins/check_nrpe -H
193.110.158.5 -c restart_xxxweb
;;
esac
;;
# The HTTP service somehow managed to turn into a hard error
without getting fixed.
# It should have been restarted by the code above, but for some
reason it didn't.
# Let's give it one last try, shall we?
# Note: Contacts have already been notified of a problem with the
service at this
# point (unless you disabled notifications for this service)
HARD)
echo $(date): na 3x proberen wil de xxxweb gateway nog
altijd niet opstarte, misschien eens proberen met de server te rebooten ?
/tmp/eventhandler_test
;;
esac
esac
exit 0
---
Tom Van Overbeke - ABSI Service Delivery Coordinator
email: [EMAIL PROTECTED]
Tel: +32 2 333 40 00 - Fax: +32 2 332 34 69
website: http://www.absi.be
---
Marco Borsani [EMAIL PROTECTED]
Sent by: [EMAIL PROTECTED]
03/04/2006 13:57
RE: [Nagios-users] start a script automatically
-Original Message- From: Marco Borsani [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 05, 2006 2:59 AM To: Marc Powell Cc: 'NAGIOS' Subject: R: [Nagios-users] start a script automatically -}Marc wrote: -} -}Not without the rest of the error that you chopped off. -}What's the '' part? That's probably the most useful bit -}of information. You've been on the list long enough to know -}we need more information than that -};) Complete message is: Warning: Attempting to execute the command /usr/local/nagios/libexec/eventhandlers/restart-http $SERVICESTATE$ $STATETYPE$ $SERVICEATTEMPT$ It's a moot point now it seems but in the future, there should be even more to this error and the variables would have been filled in. From the code, the complete line will look like -- base/utils.c: snprintf(buffer,sizeof(buffer)-1,Warning: Attempting to execute the command \%s\ resulted in a return code of %d. Make sure the script or binary you are trying to execute actually exists...\n,cmd,result); The return code would have been the interesting part. A real example -- var/archives/nagios-04-11-2004-00.log:[1081457063] Warning: Attempting to execute the command /usr/local/nagios/libexec/check_ping 208.182.181.2 100 100 5000.0 5000.0 -p 1 -t 30 resulted in a return code of 127. Make sure the script or binary you are trying to execute actually exists... -- Marc --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
RE: [Nagios-users] start a script automatically
-Original Message- From: [EMAIL PROTECTED] [mailto:nagios-users- [EMAIL PROTECTED] On Behalf Of Marco Borsani Sent: Tuesday, April 04, 2006 9:04 AM To: [EMAIL PROTECTED] Cc: 'NAGIOS' Subject: R: [Nagios-users] start a script automatically I followed istructions on the manual. When Nagios try to run the command, in the nagios.log I still read : Warning: Attempting to execute the command /usr/local/nagios/libexec/eventhandlers/restart-http ls -la /usr/local/nagios/libexec/eventhandlers/restart-http -rwxr-xr-x 1 root sys 489 Apr 4 15:06 /usr/local/nagios/libexec/eventhandlers/restart-http Any idea? Not without the rest of the error that you chopped off. What's the '' part? That's probably the most useful bit of information. You've been on the list long enough to know we need more information than that ;) Can you run restart-http as the nagios user? Show us the command and service definition. Verify that you're using full paths for commands used within restart-http. Detail what restart-http is doing specifically. -- Marc --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
Re: [Nagios-users] start a script automatically
Look into event handlers. Joe Petrucci Office: 704-383-6089 Cell : 724-462-0443 Marco Borsani [EMAIL PROTECTED] Sent by: [EMAIL PROTECTED] 04/03/2006 07:57 AM To 'NAGIOS' nagios-users@lists.sourceforge.net cc Subject [Nagios-users] start a script automatically Hi all! Is it possible to start a script automatically on a remote host in case of a particolar event? For example, if nagios detects that process named on a DNS server is down, will Nagios can run a remote command on that server to restart the process? Regards Marco Borsani Unix Monitoring System Administrator Technical Operation Tel. +39 010 4310115 Fax +39 010 4327454 E-mail: [EMAIL PROTECTED] ITnet S.r.l. - Direzione e Coordinamento di WIND Telecomunicazioni S.p.A. Internet Service Provider Sede legale: Via C.G.Viola, 48 - 00148 Roma Dir. Centrale e Amministrativa: Via Pacinotti, 39 16151 Genova (Italy) http://www.it.net mailto:[EMAIL PROTECTED] ___ Altre sedi ITnet: MILANO tel.: +39 02 30114900 [EMAIL PROTECTED] ROMA tel.: +39 06 83116707 [EMAIL PROTECTED] ___ ITnet is associated to CIX (Commercial IP eXchange) and RIPE ITnet is associated to AIIP (Associazione Italiana Internet Providers) --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid=110944bid=241720dat=121642 ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null ForwardSourceID:NT00014CEE
