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The Nagios enterprise monitoring tool generates a variety of events. The principal events generated are the results You forgot to provide an Email Address. This email address is already registered. You have exceeded the maximum character limit. Please provide a Corporate E-mail Address. Please check the box if you want to proceed.
Also generated is performance data and notification events such as outages and downtime. There are a number of ways to integrate and utilize these events. NEB uses callback routines that are executed when events occur in the Nagios server. Using NEB you can write broker modules that can process these events. NEB allows you to output and integrate events into a variety of tools including MySQL databases, SNMP traps, syslog messages or use the event data in a variety of other applications and tools.
NEB uses shared code libraries called modules that are hooked into the Nagios server when it is executed. Each module can register callback procedures that are able to receive and process events. When an event occurs, NEB checks for the presence of a registered callback and, if detected, sends the event to the module. The module receives the event and performs whatever actions are coded into it.
You can see a full list of the callbacks in the nebcallbacks. NEB should be enabled by default when you compile Nagios unless you disable it. If you want to ensure that NEB gets compiled then specify the --enable-neb configure option when configuring Nagios. This line would load a module called testmodule. You can also specify a configuration file for a module like so:. You can see an example of a module in the Nagios package.
Located in the module directory off the root of the package is the helloworld module. You can create it by compiling the helloworld. Restart Nagios and the module is now loaded.
The Helloworld module is extremely simple. Helloworld logs a message to the default Nagios log file when Nagios is started and stopped and when aggregated status updates start and finish. The message looks like:. There are not a lot of NEB modules available, so far. It should provide together with the helloworld module a good introduction to NEB and help you get started on writing your own modules.
There is not a lot of documentation available for NEB thus far. You can also review the Nagios source code relevant to NEB, particularly the include files. As always the Nagios development and user mailing lists are good starting places for assistance. Encryption, speed push the modern mainframe into the future.
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