Nagios Support Forum

Thank you for resolving our Sorry Dave issue, but we are still experiencing issues with the VM hosts. A lot of them are still saying the Guest OS doesn't exist, but I know for sure it does. Also, the hosts' errors fluctuate. One minute it's fine and then it will say its critical because the service doesn't exist.

Are you checking an ESX host or a VCenter server? Do you have vmotion enabled? Is it possible that your guest is swapping hosts?

I am checking on the ESX server and the cluster hosts that we monitor in Nagios. They keep rotating from all services being ok to alot of them being in critical and then they go back to being fine.

OK, so you do not have a cluster of vmware servers that house the machines you are checking? It seems to me that you have vmotion or something similar and they are migrating to other hosts due to load or something else, when these checks are failing, as it states they cannot be found and is generally the message when this occurs.

This morning our webpage wouldn't load because there was a memory issue. We added more memory and now some of the services will not start. Here is some of the output that we are getting:

[root@nagios ~]# service httpd status
httpd (pid 26547) is running...
[root@nagios ~]# service mysqld status
mysqld (pid 29554) is running...
[root@nagios ~]# service postgresql status
postmaster is stopped
[root@nagios ~]# service ndo2db status
ndo2db is not running but subsystem locked
[root@nagios ~]# service nagios status
nagios is not running

Nevermind, we figured it out.

Excellent, and I do hope postgresql is running, that will be required.

Yes, postgresql is running, but I do notice that the Database Maintenance has red explaination mark. Is there something that can be done?

If you mouse over the red icon it should show you how long it has been since it ran. You can run it manually to sort of reset this number, and cron should take it from there:

Thank you! That worked.