Deploy button should not be active (available) if no nodes were registered

[opavlenk]

UI with default pre-loaded plan but no registered nodes has "Verify and Deploy" button available for action.
Attempting to deploy will cause a "Failed deployment" which is correct, since no nodes are available for deployment, but having the deploy option available without nodes is confusing from the beginning.

System should not attempt to deploy if no nodes are available for the action.

[Jiri Tomasek (jtomasek)]

Making the deploy button disabled is IMHO going to bring more confusion due to the fact how we display nodes counts at the moment (see https://bugs.launchpad.net/tripleo/+bug/1640103)

The 'Validate and Deploy' button does not trigger any harmful operation. It brings up the summary view which provides the user with feedback on whether starting the deployment is safe or not. It is the up to the user to evaluate provided information and decide to start the deployment.

[Jiri Tomasek (jtomasek)]

If disabling the deploy button is still required after previous explanation, it can be added after Nodes tagging and assignment is split (see bug referenced above).

[Jason E. Rist (jason-rist)]

I agree with you Jiri. Let's close as invalid and look to make improvements in Ocata.