Nagios

I currently have two hosts where one acts as a backup for the other and so
long as the first is up the second will always be down.

What I am looking to do is control the status of the second based on the
first and am wondering if this kind of configuration is possible?

I tried using a host dependency and host definitions as follows but no luck
so far

define hostdependency{
        dependent_host_name             sydisdn
        host_name                       sydgw
        execution_failure_criteria      o
        }

define host{
        use                     router
        host_name               sydgw
        alias                   sydgw
        address                 *.*.*.*
        hostgroups              router,sydney
}

define host{
        use                     router
        host_name               sydisdn
        alias                   sydISDN
        active_checks_enabled   1
        passive_checks_enabled  0
        address                *.*.*.*
        hostgroups              isdn,sydney


I would like to be able to display the status of sydisdn as downtime when
sydgw is up and running normally. When the status of sydgw is anything else
sydisdn should be monitored to check its status.

Any help would be much appreciated.

Brad



-- 
Bradley Mclain
Systems Administrator Trainee
De Bortoli Wines Pty limited
De Bortoli Rd, BILBUL NSW  2680
e:  bradley_mclain@...

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Steve Burton wrote:
> Hi,
> 
> I  have  nagios  3.0.4 running on FreeBSD and I'm using nagiosgraph to
> generate  rrd's  on  the  data.  I'm  visualizing  the  data with both
> nagiosgraph and drraw.
> 
> My  problem  is that the graphs have gaps so I guessing that the rrd's
> are  not  being  updated.  I'm  concentrating  on just one service for
> debugging   and   I've  run  the  plugin  (which  I  wrote)  from  the
> command-line  many times for a local server and I haven't seen it fail
> to  connect  or  report  or to time out. It is as though nagios is not
> checking  the service within the heartbeat of the rrd's in question. I
> have  set  the service check interval to 5 minutes, which I believe to
> be  the  default nagiosgraph step time and the heartbeat is set to the
> nagiosgraph default of 600 seconds.
> 
> Can anyone advise me if if this is likely to be the problem and if not
> how I can diagnose what is actually going on?

I have put a diagnose on the mailinglist for something that is either
the same problem or something similar.

The problem is that nagios can send several commands into the pipe at
once and the other end will only pick up one of them. So the RRD info is
not written. The work around is not to allow Nagios to run things in
parallel. But it will severly limit the amount of hosts and services one
can check with Nagios.

This should have been fixed by using the file interface instead of the
named pipe. The file interface was introduced about a year ago or even
longer back.

Please check the mailinglist archives for more details.

Hugo.

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