Problem: Error deleting DNS Record Set when deleting instance
Problem/Opportunity Statement
When an instance is renamed, new DNS records are created. This means when an instance is deleted, Nova does not try to delete the newly-created record. Therefore we delete the records ourself. In the case an instance is never renamed, there is a race condition between nova and Exosphere deleting the record set.
What would success / a fix look like?
Silently ignore the error in this case, or only issue a delete request if an instance has been renamed.