Open Stack

I have a heat template which accepts parameters/values via an environment
file.
This heat template creates x amount of cinder volumes based on the
parameter value
defined in the environment file.

I have instances that dont require cinder volumes, so it is possible that
the instances could
also use the same template. However HEAT chokes because I dont provide
values to create the cinder volumes.

So instead of having two templates, is it possible to put a conditional
check within
the heat template.
The condition check would be something like:

if cinder volume size = 0, then dont exercise the cinder resources
statements.

I am not sure something like this is currently supported by heat. So
hopefully the community has some suggestions or clues.

Thanks in advance.
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