Metrics Endpoint for monitoring IP address exhaustion

[dronenb]

Title

Metrics endpoint

Description

It would be nice if the F5 IPAM controller exposed a prometheus metrics endpoint, particularly so the number of free IP addresses can be monitored for exhaustion on a per IPAM label basis.

Actual Problem

Right now it is difficult to monitor for IP address exhaustion.

Solution Proposed

Expose a prometheus compatible /metrics endpoint that exposes this information on a per IPAM label basis.