Nagios XI - Scheduled Downtime Not Working
When you attempt to scheduled downtime for a host or service the downtime never appears despite being informed it was successfully added.
In addition to this when you navigate to Home > Incident Management > Scheduled Downtime there are no entries.
This problem can be caused by the Nagios XI server being unable to resolve "localhost".
Diagnosing The Problem
Open an SSH session to your Nagios XI server and execute the following commands:
tail -f /var/log/httpd/error_log
Now go into the XI interface and attempt to schedule downtime for a host or service.
You receive output similar to the following:
[Tue Oct 11 13:49:55 2016] [error] [client 10.25.254.50] Couldn't resolve host 'localhost', referer: http://10.25.5.12/nagiosxi/includes/components/xicore/downtime.php?cmd=schedule&type=host
You can see that the log file is complaining that it cannot resolve localhost.
If you execute the following command you can see the contents of the /etc/hosts file:
Here is the output:
127.0.0.1 localhost.localdomain localhost.localdomain localhost4 localhost4.localdomain4 xi-c6x-x64
If you look at the output you can see that there are no "localhost" entries, there are similar entries but not one for "localhost".
Resolving The Problem
Edit your /etc/hosts file and make sure there are localhost entries. For example:
127.0.0.1 localhost.localdomain localhost.localdomain localhost4 localhost4.localdomain4 localhost xi-c6x-x64
The last step is to restart the Apache service using one of the commands below:
RHEL 6 | CentOS 6 | Oracle Linux 6
service httpd restart
RHEL 7 | CentOS 7 | Oracle Linux 7
systemctl restart httpd.service
service apache2 restart
Debian | Ubuntu 16/18
systemctl restart apache2.service
Now go and schedule downtime, your problem should be resolved.
For any support related questions please visit the Nagios Support Forums at:
|Posted by: tlea - Mon, Oct 10, 2016 at 11:01 PM. This article has been viewed 1300 times.|
|Online URL: https://support.nagios.com/kb/article/nagios-xi-scheduled-downtime-not-working-548.html|
Powered by PHPKB (Knowledge Base Software)