Re: [Nagios-users] Plugin that will test nagios.cfg
On my installation I noticed that it does crash when you do
/etc/init.d/nagios restart, but not if you do /etc/init.d/nagios reload
which I think is what you should be doing.
When deploying, I use reload instead of restart, that way you get the
error message from the pre-flight check but nagios still stays up and
using the older configuration which gives you the change to fix it and
reload nagios again until it works, without taking nagios down or have
it crash.
You must be doing /etc/init.d/nagios restart where you should be doing
/etc/init.d/nagios reload.
BTW I am using nagios 2.5 at the moment.
I think the other guys have the right idea of calling the pre-flight
check with nagios -v and only trying to reload/restart if that is
successful. Although on my deploy script, doing a reload does this
anyway, so I haven't implemented it in my deploy, but a very good
suggestion that I may use just to be double sure and not rely on the
reload argument to the init script doing the right thing.
-h
Hari Sekhon
Thomas Guyot-Sionnest wrote:
On 21/06/07 05:20 PM, Patrick Morris wrote:
Arno Lehmann schrieb am Donnerstag, den 21. Juni 2007:
Hi,
chiel schrieb:
I'm looking for a plugin that will check if the nagios.cfg is ok.
So besecauly run this command: /usr/local/nagios/bin/nagios -v
/usr/local/nagios/etc/nagios.cfg. Is there a plugin for this?
Wouldn't it be better to check this in the cron job itself? Nagios
won't help you much if it crashes because of a broken config.
The cron job could, naturally, report problems as passive results to
Nagios...
Nagios will never crash because of a broken config if it's running;
it just won't load that config. Checking from a cron job works, too,
but there's no reason Nagios can't also check to see if the on-disk
config is valid.
Not true. I noticed more than once that nagios would bail out on
restarts with broken configs (with versions ranging between 2.0 beta to
2.4) and I just verified with v2.7.
About the other problem, why not have the scripts restart nagios
themselves after checking that the config isn't broken? As it was
mentioned in another thread just use the return status:
#!/bin/bash
if nagios -v nagios.cfg; then
killall -HUP nagios
else
echo Nagios config is broken!
exit 1
fi
#!/usr/bin/perl
`nagios -v nagios.cfg`;
if ($?) {
die(Nagios config is broken!);
}
killall -HUP nagios
If you have different scripts running you can also write a standalone
script that does the job. It could also send back the result to Nagios.
Thomas
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Re: [Nagios-users] Plugin that will test nagios.cfg
Hi, 21.06.2007 23:20,, Patrick Morris wrote:: Arno Lehmann schrieb am Donnerstag, den 21. Juni 2007: Hi, chiel schrieb: I'm looking for a plugin that will check if the nagios.cfg is ok. So besecauly run this command: /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg. Is there a plugin for this? Wouldn't it be better to check this in the cron job itself? Nagios won't help you much if it crashes because of a broken config. The cron job could, naturally, report problems as passive results to Nagios... Nagios will never crash because of a broken config if it's running; it just won't load that config. Checking from a cron job works, too, but there's no reason Nagios can't also check to see if the on-disk config is valid. Well, I've seen Nagios crash on a broken config. Even if this is a bug which should (and perhaps is) fixed, I would not rely on that behaviour if I can easily avoid that. Thus my recommendation... Arno - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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] Plugin that will test nagios.cfg
did you see my last email regarding this and reload vs restart? also, something I forgot to add, here is a very basic shell test that I run through cron to check nagios is up and email me if not: $PLUGIN_DIR/check_nagios -F $NAGIOS_STATUS_LOG -e 5 -C $NAGIOS_BINARY $LOG if [ $? != 0 ]; then /bin/mail -s Nagios may not be running! $RECIPIENT $LOG /dev/null fi obviously you need to set the $VARIABLES to the paths of your nagios binary, log file, plugin directory where the check_nagios plugin is located. Hope that helps. -h Hari Sekhon Arno Lehmann wrote: Hi, 21.06.2007 23:20,, Patrick Morris wrote:: Arno Lehmann schrieb am Donnerstag, den 21. Juni 2007: Hi, chiel schrieb: I'm looking for a plugin that will check if the nagios.cfg is ok. So besecauly run this command: /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg. Is there a plugin for this? Wouldn't it be better to check this in the cron job itself? Nagios won't help you much if it crashes because of a broken config. The cron job could, naturally, report problems as passive results to Nagios... Nagios will never crash because of a broken config if it's running; it just won't load that config. Checking from a cron job works, too, but there's no reason Nagios can't also check to see if the on-disk config is valid. Well, I've seen Nagios crash on a broken config. Even if this is a bug which should (and perhaps is) fixed, I would not rely on that behaviour if I can easily avoid that. Thus my recommendation... Arno - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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 - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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] Plugin that will test nagios.cfg
On 22/06/07 05:14 AM, Hari Sekhon wrote: On my installation I noticed that it does crash when you do /etc/init.d/nagios restart, but not if you do /etc/init.d/nagios reload which I think is what you should be doing. One everyone uses init scripts. Nagios can also be restarted via signals, web interface and directly trough the command pipe. Any of these methods won't do any sanity checking. The init script does pretty much what I put in my bash example (and even more sanity checking)... BTW it checks the config on restarts too, so maybe you're running an old version... Thomas - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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] Plugin that will test nagios.cfg
-Original Message- From: [EMAIL PROTECTED] [mailto:nagios-users- [EMAIL PROTECTED] On Behalf Of Hari Sekhon Sent: Friday, June 22, 2007 9:24 AM To: Thomas Guyot-Sionnest Cc: nagios-users@lists.sourceforge.net Subject: Re: [Nagios-users] Plugin that will test nagios.cfg One everyone uses init scripts. Nagios can also be restarted via signals, web interface and directly trough the command pipe. Any of these methods won't do any sanity checking. Do you mean Not everyone uses init script? The init script does pretty much what I put in my bash example (and even more sanity checking)... BTW it checks the config on restarts too, so maybe you're running an old version... nagios 2.5 as I mentioned. not too old I think. It does check on restart, but the difference is that nagios is stopped so it can't start with the broken config, therefore it is no longer running, whereas if I do a reload instead then nagios is still running and I get the error checking but nagios is still up with the old config until I fix the new config and do another reload. Nagios basically stays up and keeps it's existing config if the new config doesn't pass the pre-flight check. I'd say you're using a broken init script then. It's very clear that nagios verifies the config and only stops and starts if verification is OK. restart) printf Running configuration check... $NagiosBin -v $NagiosCfgFile /dev/null 21; if [ $? -eq 0 ]; then echo done $0 stop $0 start else #$NagiosBin -v $NagiosCfgFile echo FAILED! Restart aborted. Check your Nagios configuration. exit 1 fi ;; -- Marc - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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] Plugin that will test nagios.cfg
One everyone uses init scripts. Nagios can also be restarted via signals, web interface and directly trough the command pipe. Any of these methods won't do any sanity checking. Do you mean Not everyone uses init script? The init script does pretty much what I put in my bash example (and even more sanity checking)... BTW it checks the config on restarts too, so maybe you're running an old version... nagios 2.5 as I mentioned. not too old I think. It does check on restart, but the difference is that nagios is stopped so it can't start with the broken config, therefore it is no longer running, whereas if I do a reload instead then nagios is still running and I get the error checking but nagios is still up with the old config until I fix the new config and do another reload. Nagios basically stays up and keeps it's existing config if the new config doesn't pass the pre-flight check. -h - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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] Plugin that will test nagios.cfg
On Thu, 21 Jun 2007, Marc Powell wrote: If you can reliably reproduce this with a '/etc/init.d/nagios reload' or 'restart' then you should report it as a bug. Nagios is meant to not crash or bail a running copy if the new config is bad. If nagios can not start due to a broken config then a restart WILL die. A restart is nothing short of a stop and start of the program. Wether or not an attempt to reload a broken config should result in a program failure is not clear to me. But I would consider as-is and would not considere it a bug if it would die on a reload of a broken config. As the admin it is my job to give nagios a sane config. If I fail to provide nagios one then I understand nagios is getting rather disappointed. Hugo. -- [EMAIL PROTECTED] http://hugo.vanderkooij.org/ This message is using 100% recycled electrons. Some men see computers as they are and say Windows I use computers with Linux and say Why Windows? (Thanks JFK, for the insight.) - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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] Plugin that will test nagios.cfg
-Original Message- From: [EMAIL PROTECTED] [mailto:nagios-users- [EMAIL PROTECTED] On Behalf Of Hugo van der Kooij Sent: Friday, June 22, 2007 3:30 PM To: Nagios Users mailinglist Subject: Re: [Nagios-users] Plugin that will test nagios.cfg On Thu, 21 Jun 2007, Marc Powell wrote: If you can reliably reproduce this with a '/etc/init.d/nagios reload' or 'restart' then you should report it as a bug. Nagios is meant to not crash or bail a running copy if the new config is bad. If nagios can not start due to a broken config then a restart WILL die. A restart is nothing short of a stop and start of the program. Then you are not using the distribution init script and you must include that logic yourself. Read it or read back in this thread. The only possible way it should die is if nagios -v didn't detect a fatal error. That would be a bug. If a person doesn't use the distribution init script then they are responsible for ensuring that the config is good before restart. -- Marc - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ 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
[Nagios-users] Plugin that will test nagios.cfg
I'm looking for a plugin that will check if the nagios.cfg is ok. So besecauly run this command: /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg. Is there a plugin for this? I want this because I reload the nagios config every 15 minutes through a cronjob. And I want to be notified if there is a error in the config. The reason of using a cronjob is that custom programs populate/change my .cfg files - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ 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] Plugin that will test nagios.cfg
On 21/06/07 05:20 PM, Patrick Morris wrote:
Arno Lehmann schrieb am Donnerstag, den 21. Juni 2007:
Hi,
chiel schrieb:
I'm looking for a plugin that will check if the nagios.cfg is ok.
So besecauly run this command: /usr/local/nagios/bin/nagios -v
/usr/local/nagios/etc/nagios.cfg. Is there a plugin for this?
Wouldn't it be better to check this in the cron job itself? Nagios
won't help you much if it crashes because of a broken config.
The cron job could, naturally, report problems as passive results to
Nagios...
Nagios will never crash because of a broken config if it's running;
it just won't load that config. Checking from a cron job works, too,
but there's no reason Nagios can't also check to see if the on-disk
config is valid.
Not true. I noticed more than once that nagios would bail out on
restarts with broken configs (with versions ranging between 2.0 beta to
2.4) and I just verified with v2.7.
About the other problem, why not have the scripts restart nagios
themselves after checking that the config isn't broken? As it was
mentioned in another thread just use the return status:
#!/bin/bash
if nagios -v nagios.cfg; then
killall -HUP nagios
else
echo Nagios config is broken!
exit 1
fi
#!/usr/bin/perl
`nagios -v nagios.cfg`;
if ($?) {
die(Nagios config is broken!);
}
killall -HUP nagios
If you have different scripts running you can also write a standalone
script that does the job. It could also send back the result to Nagios.
Thomas
-
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
___
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
