Nagios Service Dependency Generator

[Andy Shellam]

It's been a little later than I originally planned, but I've now created 
the Service Dependency Generator for Nagios.

This tool will generate a number of service dependencies for one or more 
host/service combinations.  This will be best used for the "matrix" 
dependency problem.  E.g. NRPE checks on a server depend on the master 
NRPE check on the same server.  You cannot create a single dependency 
definition, or each NRPE check will depend on every other server's 
master NRPE check.

This tool will generate these sort of dependencies for you.
Page 256 of the Nagios 2.0 manual will help explain what the various 
options mean.

To use, visit:  http://apps.andyshellam.eu/nagios_sdg.

If you don't select a master host (the default), then a dependency on 
each service will be generated for each host you enter, otherwise each 
generated check will depend on the master host/service you enter.

E.g. Some common dependencies to generate:

A series of website checks on one server depend on the server's Web 
Service check:

1. Check "Define master host"
2. Enter the server's name in the "Master host" box
3. Enter "Web Service" as the master service check
4. Enter the server's name in the "Dependent Hosts" box
5. Enter the list of website checks in the "Dependent Services" box
6. Select the extra options
7. Generate!

For every server in Nagios, each check that requires NRPE depends on the 
same server's "master NRPE Agent" check:

1. Leave "Define master host" unchecked
2. Enter a list of all servers in the "Master/dependent hosts" box
3. Enter "NRPE Agent" as the master service check
4. Enter a list of all NRPE-checks in the "Dependent Services" box
5. Select the extra options
6. Generate!

The tool can generate you a config file to save directly to the Nagios 
server, or output directly in your browser for copy/pasting.

Regards

Andy.

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