Add support for dynamically adding/removing hosts

[ke4qqq]

So - after getting the free unicorn that's included with every CloudStack download - it would be awesome to have the 'Add a CloudStack' cloud do the following on addition:

*listVirtualMachines
And then compare that with the machines already being monitored
For those machines that aren't monitored - add them to Zenoss monitoring
For those machines that are powered off - they should be Discovered, but put in maintenance
For those machines that are powered on - they should be Discovered in production.

An an ongoing basis - there should be a event command that does the following:
If a machine is added (and zenoss discovers that via the event log) - that should trigger Zenoss adding the virtual machine

If a machine is shutdown (and zenoss discovers that via the event log) - that should trigger Zenoss placing the machine in maintenance

If a machine is destroyed (and zenoss discovers that via the event log) - that should trigger Zenoss placing the machine in decommissioned.

[ToddHebert]

This is a fantastic idea.. but won't work to well when you have 40 VM's with the exact same IP address in the each customer's separate guest subnet (10.1.1.0/24 by default)

[ke4qqq]

indeed - didn't think about that - was honestly thinking private cloud usage - but same issue would apply. Maybe the NaaS stuff in acton solves that. Otherwise, we'd likely need a collector for each account to do that well.