Fwd: Uptime error

[sujith h]

---------- Forwarded message ----------
From: sujith h <sujith.linux at gmail.com>
Date: Feb 28, 2007 7:12 PM
Subject: Re: [Nagios-users] Uptime error
To: "Andy Shellam (Mailing Lists)" <andy.shellam-lists at mailnetwork.co.uk>

Actually we used check_ping till 5 months before and then we decided to move
on to uptime .
The reason is that suppose I have a machine named don whose ip is
192.102.1.2
and if my machine is down for 1 day. And some other guy in my office started
his machine
his dhcpclient will run and give my ip (Think as if for the time being). Now
the ping will
work in any case but the uptime wont. So that is why I decided to move on
with uptime
in Host check.

Sujith

Bangalore

On 2/28/07, Andy Shellam (Mailing Lists) <
andy.shellam-lists at mailnetwork.co.uk > wrote:
>
>  You can do it by setting scheduled host checks, but it's very
> performance-intensive, and *will* affect your service checks.
> Your uptime check will do what you want much better if you add it as a
> service to your host.
>
> Why are you so insistent you don't want to use check_ping as your host
> command and Uptime as a service?
>
> Andy.
>
>
> sujith h wrote:
>
> The use of option : use_aggressive_host_checking=1
> in the nagios.cfg file will make any difference???
>
>  Sujith
>
>  Bangalore
>
> On 2/28/07, Andy Shellam (Mailing Lists) <
> andy.shellam-lists at mailnetwork.co.uk> wrote:
>
> > sujith h wrote:
> >
> > I think i foregot to explain a crucial point that nagios is running in
> > my router not in my
> > machine. If i had told u my machine, then I really apolagise for
> > stealing your precious
> > time.
> >
> >
> > No, I understand that.
> >
> > And is there anyway that I can trigger the check_uptime (plugin written
> > by me)
> > all the time when the router is up???
> >
> >
> > Yes.  Define it as a service for your host that runs, say, every 5
> > minutes 24x7.
> >
> > . If so please do tell me. If the router is down and
> > nagios doesnt run then its ok for me. Since that is a different issue.
> > But from your reply
> > I came to understand that check_uptime will be called for the first time
> > when the nagios
> > is started and then if any of the services fails then again the
> > check_uptime is called.
> >
> >
> > Yes.  Nagios only checks a host status when it absolutely needs to, not
> > any other time.  This is usually when a service fails, or a network blockage
> > is detected.  check_ping to 127.0.0.1 on this check would work fine in
> > your case.
> >
> > Andy.
> >
> >
> >
> > Sujith
> >
> > Bangalore.
> >
> > On 2/28/07, Andy Shellam (Mailing Lists) <andy.shellam-lists at mailnetwork.co.uk>
> > wrote:
> > >
> > > Again, as I and Patrick have said, your host's check_command is only
> > > getting run when a service is deemed to have problems.
> > >
> > > You're getting the difference in the uptime output in Nagios and the
> > > console because Nagios hasn't run the uptime command for the host for over a
> > > day.
> > > If you're not retaining status information, then when you restart
> > > Nagios, it re-runs all it's checks, hence why it then gets updated.  After
> > > that it is only run when a service fails.
> > >
> > > What I still don't understand is how your uptime command ensures the
> > > router is up?  If the router is not up, then Nagios won't be running (as
> > > you're running it on the same host) so it seems quite pointless really.  If
> > > the Lanlink checks that the LAN interface is up and connected - that makes
> > > sense, but then a check_ping to 127.0.0.1 as your host check_command
> > > would give the same result as the uptime, then you could have an "Uptime"
> > > service with your check_uptime command.
> > >
> > > That way you could be confident that the status detail in Nagios is
> > > reasonably up-to-date.
> > >
> > > Andy.
> > >
> >
> >
> !DSPAM:37,45e56884103005404720733!
>
>
>
> --
> Andy Shellam
> NetServe Support Team
>
> the Mail Network
> "an alternative in a standardised world"
>
> p: +44 (0) 121 288 0832/0839
> m: +44 (0) 7818 000834
>
>
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