Comment 16 for bug 1811235

At a high level, I agree it makes sense not to go into ERROR state if a cold migrate to self fails, but ERROR state + fault message is generally "the way" that nova communicates failure of an action upon an instance. The end user sees the ERROR state and looks at the fault message to discover that something was not successful.

If we remove going to ERROR state, how will the end user know that their instance did not succeed in the migration? The instance actions API policy defaults to admin-only. Is there some other way the end user can discover the migration was not successful?