Check_Cloudstack

Nagios Plugin written in Python which can be executed in different modes:

capacity : Global Capacity
virtualrouter : Global Status of Virtual Routers
systemvm : Global Status of System VMs
hoststatus : Status of Hosts per Cluster
vmplacement (experimental) : Check if vms can be migrated to get more continuous space
projects : Check if Projects have reached their thresholds for resources
domains : Check if Domains have reached their thresholds for resources
offerings : Check per cluster if their are offerings which can not be deployed anymore.

More on Github.