Windows 2012 DHCP Failover and Scope Health Check

Monitoring for Windows Server 2012 DHCP Failover architecture. Supports LoadBalance and Failover modes.

Monitors:
- Failover State
- Failover Mode
- Scope State of Each Scope
- Scope Statistics (PercentInUse) of Each Scope

This check was built with the expectation that all aspects of a DHCP service should be healthy, and reports accordingly. The script maintains only the most severe exit code as it runs, and exits with that value once all checks have been completed.

It should be noted that each portion of this script can easily be broken out into it's own check if desired.

Requirements:
Windows Server 2012 With DHCP Installed
NSClient++

Implementation:
- Implement as with any other NRPE check with NSClient++.
- There are no real arguments to pass, but the check_command requires one to function.
define service {
...
check_command check_nrpe!check_failover_dhcp!foo
}


Hopefully this check helps others who are also implementing the Failover architecture introduced with Windows Server 2012.

Suggestions welcome. Please leave a comment.