Nagios Support Forum

Hi!

We were able to get Nagios 5.6.14 installed on a new CentOS 7 system and restored the database without errors however on the admin panel, the monitoring engine and performance grapher have a red '!'. I verified that the current system before I took the backup to the .tar file did not have this issue. I'm not sure where to go with this as click on the gear to the right. Monitoring engine says an error occured and Performance Grapher said the command successfully completed but its still in red condition. Any ideas?

Tom

If you PM me a system profile I can diagnose further. Get one by going to Admin (top menu) => System Profile (in the left menu), then clicking the blue button.

If you're unable to generate the the profile through the web interface, please try generating it from the command line by running these commands as root: Then send me the resulting /usr/local/nagiosxi/var/components/profile.zip file.
If the profile script fails, please include the ENTIRE output.

Note about Database Backend

ndo2db, (sometimes called the Database Backend) is no longer needed in newer (>=5.7.0) versions of Nagios XI.

ndo2db is our older technology that basically listens on a UNIX socket for database inserts, then handles the actual insertion into the database. It has limits, being that it runs into issues when it tries to insert more than the database can handle. In newer versions (Nagios XI 5.7.0 and later), this was replaced by just writing directly to the database from the Nagios worker threads. In addition to being able to handle more database inserts, this resulted in an overall performance boost, too.

Hence, it may be better for performance reasons to use Nagios XI 5.7.x or later.

There are a bunch of rogue files (*~, #*#) in your /usr/local/nagios/etc directory. Best to remove them.

And the line endings in your nagios.cfg file are DOS line endings, and it's preventing the monitoring engine from starting. Fix it with this command:

Thank you its better!!!

I don't appear to be getting SQL (or DB) errors anymore but monitoring engine and performance grapher are still red. When I try to start either I get an error.

Tom

I see a database error in your logs, likely due to incompatible string escaping for insertion into your PostgreSQL database.

Fix this by setting standard_conforming_strings = of in /var/lib/pgsql/data/postgresql.conf, then restart postgres.

Thank you for that last comment. Both are still red and when I go to start monitoring engine I get a an error but performance grapher does say it successfully completed but doesn't turn green.

Tom

Your config.inc.php is set up to store performance data spool in /var/nagiosramdisk/spool/ (for performance reasons) but no such directory exists. Perhaps there's a missing /etc/fstab entry that set that up.

Follow this guide to re-setup the RAM disk

YES!!!! That was the ticket. Thank you!!!!!!!!

On a sidenote does the backup include custom plugins/etc?

Yes, the backup includes the entire /usr/local/nagiosxi directory. Any plugins and components should be part of that.

Thats really good news. We will work on putting it back to its original IP address and check its operation.

Thank you,

Tom