> -----Original Message----- > From: Hari Sekhon [mailto:[EMAIL PROTECTED] > Sent: Wednesday, September 19, 2007 3:13 AM > To: Marc Powell > Cc: Nagios-users@lists.sourceforge.net > Subject: Re: [Nagios-users] dont check service when host down > > Marc Powell wrote: > > Hosts are only checked when a service > > on that host changes state. Service goes critical, host is checked. > > Service recovers, host is checked. At no time in between is the host > > checked. > > Oh, ok, this seems a little contrary to logic but perhaps I just think > in a strange way (but then we knew that!). > > I suppose this method puts the emphasis on services rather than hosts > and seems to give much higher priority to > services, which is fair enough actually.
That's exactly right, nagios is a service monitor. Nagios-2 and prior really only uses host checks to determine if there is a wider host or network issue causing a problem with a service in order to handle alerts more appropriately. > Perhaps the state change was from pending to OK and that triggered the > initial host check... > In this scenario it actually worked better to check the service anyway... If this is the only service on the host a pending->OK transition gives the host a 'host assumed to be up' designation. The host isn't actually checked. Given the limited information I'd have to say that the service did flap at some point _or_ you have aggressive host checking enabled. -- Marc ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ 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
