host checking logic

[Terry]

On 10/11/07, Marc Powell <marc at ena.com> wrote:
>
>
> > -----Original Message-----
> > From: nagios-users-bounces at lists.sourceforge.net [mailto:nagios-users-
> > bounces at lists.sourceforge.net] On Behalf Of Terry
> > Sent: Thursday, October 11, 2007 10:54 AM
> > To: Nagios Users mailinglist
> > Subject: [Nagios-users] host checking logic
> >
> > Hello,
> >
> > I have a host that will not be reachable via icmp (check-host-alive).
> > However, it will have services that are, check_tcp for example.
>
>
> > I always assumed (ya, i know) that nagios assumed the host was up if
> > it had services that were OK.  Obviously I am wrong or have something
> > misconfigured.  How can I get around this issue?
>
> It will assume the host is up if the very first check of a service on
> that host is successful. After that, there are no further assumptions.
> It would appear that you have had a service change state at some point,
> forcing nagios to perform the failing host check. The service recovered
> and nagios re-ran the host check to show proper host state, which again
> failed. You end up with the service UP, host DOWN state.
>
> Your best option is to just change the host check_command to something
> that does work, at least enough for you to be reasonably confident that
> the host is up given your circumstances. check_tcp to a port you know to
> be very reliable would be sufficient. Other options might be to use
> check_dummy as the host check_command so that the state is always OK or
> even to not perform host checks at all for this host.
>
> --
> Marc

Thanks for your reply.  Why is nagios even checking it given the
configuration: ?

check_interval=0
check_host_freshness=0

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