Description of problem:
I designated 2 ironic nodes to be for compute-0 and compute-1:

ironic node-update d0fd91fb-c66e-4a5d-9b66-e3806959b31c replace properties/capabilities='node:compute-0,boot_option:local'
ironic node-update 3e097f7b-7dd1-47de-b4a4-345248510b6a replace properties/capabilities='node:compute-1,boot_option:local'

I added scheduling hints to my environment file:

parameter_defaults:
  NovaComputeSchedulerHints:
    'capabilities:node': 'compute-%index%'

I then tried to deploy with 3 computes. It takes a really long time for the deployment to fail. Eventually it fails with "not enough hosts available".


Version-Release number of selected component (if applicable):
python-tripleoclient-0.3.1-1.el7ost.noarch
openstack-tripleo-heat-templates-kilo-0.8.12-2.el7ost.noarch


How reproducible:
100%


Steps to Reproduce:
1. Set ironic attributes on several nodes, and assign them to the compute(s) deployment
2. Try to deploy with more computes than you have allocated.


Actual results:
Deployment fails as it should, but this error should stop you right from the start... No need to waste time.