Comment 1 for bug 1366027

It might be possible for juju to query openstack to learn the quotas, and refuse actions that will exceed those quotas. For example, we know deploying a service without specifying a machine will create a new instance and use a security group. it may even use a floating IP. Juju could warn that the action cannot be completed because of limits.

juju cannot know about what a charm is doing so there could be cases where the charm is exceeding limits.