Using the Query Handler | Learning Nagios 4

Introducing Nagios Event Radio Dispatcher

The query handler also includes the NERD (Nagios Event Radio Dispatcher) service, which allows you to subscribe to the service or host check results. The service name is @nerd and it accepts the following commands:

@nerd list\0
@nerd subscribe <channel>\0
@nerd unsubscribe <channel>\0

The list command returns a list of channels separated by newlines, where the channel name is the first word of a line, followed by the channel's description. The subscribe and unsubscribe commands can be used to start and stop the receipt of notifications for specified channels.

For example, to list all available channels, we can simply use the following command from the shell:

# echo -e '@nerd list\0' | \
    socat - UNIX-CONNECT:/var/nagios/rw/nagios.qh

The output will be as follows:

hostchecks      Host check results
servicechecks   Service check results
opathchecks     Host and service checks in gource's log format

The opathchecks channel for notifications...

Tech Concepts

Programming languages

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Learning Nagios 4

By : Wojciech Kocjan

Learning Nagios 4

By: Wojciech Kocjan

Overview of this book

Introducing Nagios Event Radio Dispatcher

Learning Nagios 4

By : Wojciech Kocjan

Learning Nagios 4

By: Wojciech Kocjan

Overview of this book

Introducing Nagios Event Radio Dispatcher

Confirmation

Buy this book with your credits?

Submit Your Feedback

Create a Free Account To Continue Reading

Sign in to activate your 7-day free access