On Jun 19, 2009, at 4:33 PM, Kustner, Tom wrote: > I am a Nagios user, not the administrator. We are running Nagios > 2.9 on RHEL 4 or 5. Overall, 200+ hosts with 3000 services being > monitored, but I have access for monitoring a smaller number of hosts. > > In looking last week into an issue where a host had gone down but no > alert was sent, I noticed that on the "Host Status Details For All > Host Groups" screen, where it lists Hosts, Status, Last Check, etc., > the Last Check date for some of the hosts went back almost two > months. I pointed this out to the administrator who didn't > disagree with my statement but said the logs showed otherwise. > Nagios was restarted but even now, there is a host where the Last > Check date still shows as 05-19-2009. There are other hosts showing > a last check date of June 5, June 9, June 10, and so on. These > hosts are definitely up. > > Either Nagios is being tardy at checking things, is *not* being > tardy but is displaying inaccurate information, or I am > misunderstanding this field or what Nagios means by "Last check". > Can anyone shed some light?
This is normal. Hosts aren't checked unless a service on the host returns a non-OK result. If all services are up, the host must be up so there is no reason to check it. If a service returns a non-OK result, only then do you need to know if the host is down or not and a host check is run. As for the host being down and no notification being sent, you should verify that it has services defined for it, they return non-OK results when the host is down and that the host check returns a non-OK result when the host is down. Of course, your admin is the best person to check these things. -- Marc ------------------------------------------------------------------------------ Are you an open source citizen? Join us for the Open Source Bridge conference! Portland, OR, June 17-19. Two days of sessions, one day of unconference: $250. Need another reason to go? 24-hour hacker lounge. Register today! http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org _______________________________________________ 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