-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 10/11/08 10:51 PM, Sean O`Brien wrote: > Dear All, > > I have been studying GroundWork monitor, with reference of course to Nagios. > > I hope someone can answer my query. > > Re: Nagios 2.x > > It is my understanding that when all the service checks fail, Nagios performs > host checks; the number of which we have specified to 3. At which point > (after reporting that Host is in a "Non-okay" state) > Nagios resumes service checks. It is at this point my question lies. When > does Nagios perform another host check? Would it be after all the service > checks are reported "Okay" or will Nagios perform a > host check after the first service check reports "okay". > > Thank you to all in advance for taking the time to read this and respond, > it`s highly appreciated.
I might be wrong, but as far as I know Nagios 2.x performs a host check on each service failure, and notify for that service only if the host is not in HARD DOWN state after the last check (when the service enter the HARD state and the host check has already been perfiormed for that last failure). I guess it also performs one on state changes, and possibly not when services are already in a hard critical state, to detect host up (haven't really read on that but that seems to be the logical thing to do). With Nagios 3.x, there's scheduled host checks and result caching in the mix, so that : 1. not every service failure will result in a host check 2. Host checks are not run serially like they did in nagios 2.x, which was by far the biggest bottleneck. The official Nagios documentation explains the check logic in details if you read it thoughtfully. - -- Thomas -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJGQTS6dZ+Kt5BchYRAnOQAKDy6jYFWUSHe/+r5oPdrA4C0UM2LgCaA2Hi oIqady/Kz99UlzxLxDNhGiw= =kY+I -----END PGP SIGNATURE----- ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ 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
