Nagios Support Forum

Our Nagios XI implementation has recently been exhibiting the behavior where the Monitoring Engine has stopped running, but the System Status page shows all is operational. Checking the Monitoring Engine Status page shows it not running.

Attempts to restart the engine from the web interface fail, it does not start or offer any error messages. Restarting the nagios service from CLI clears things up and the engine starts and begins processing service checks.

What I want to know is if there is a way to have an email notification sent out from Nagios when it sees the Monitoring Engine has stopped?

Thanks!

The monitoring engine shouldn't be stopping, more than likely you are hitting a throttle somewhere. How many hosts / services do you have running, and what amount of CPU's / ram do you have allocated to the machine?

To answer your question though, https://exchange.nagios.org/directory/P ... us/details should work as a plugin for you to setup a corresponding check for this.

Arnth wrote:What I want to know is if there is a way to have an email notification sent out from Nagios when it sees the Monitoring Engine has stopped?

XI license entitles 3 instances:

• Production
  Test & Dev (T&D)
  Disaster Recovery (DR)

Run up a DR XI server and utilize your DR instance to monitor the production instance. This way, if the production instance goes down, you’ll receive alerts about it.
The same applies for monitoring the DR instance, make sure production monitors the DR instance to make sure it’s healthy.
By using the “Nagios XI Server” wizard to monitor the other instance, you can have confidence knowing that when something goes wrong, you’ll really hear about it.

Here's a presentation on Nagios XI Best Practices:

https://www.youtube.com/watch?v=6WlZrG-_sAI
http://www.slideshare.net/nagiosinc/nag ... -practices