Open Stack

Hi there!

We're using telemetry+cloudkitty for our rating. We're happy of it, 
though we're having the issue that we would like to bill instances 
running Windows.

The example given in the Cloudkitty doc shows how to bill more when an 
instance runs Windows. That works in theory, though in practice, 
Microsoft has a license model based on how many vCPU the instannce runs. 
So the model that the Cloudkitty documentation shows simply doesn't work 
with the SPLA thingy.

We've looked at options. One way would of course writing a new custom 
pollster, but we don't like the idea: this would mean polling for all of 
the thousands of instances that are running in our deployments. So we 
would very much prefer having ceilometer running on compute node (with 
polling_namespaces=compute) to do the work, as this scales a way better.

However, Ceilometer polls libvirt, which only has the information about 
the image ID, not the metadata associated with the image (like the 
property os_type=windows, for example).

So, is there a better way than a dynamic pollster? Can this be done with 
ceilometer on the compute nodes?

Cheers,

Thomas Goirand (zigo)