[openstack-dev] [qa] Meaning of 204 from DELETE apis

David Kranz dkranz at redhat.com
Thu Jun 12 21:35:22 UTC 2014

On 06/12/2014 05:27 PM, Jay Pipes wrote:
> On 06/12/2014 05:17 PM, David Kranz wrote:
>> Tempest has a number of tests in various services for deleting objects
>> that mostly return 204. Many, but not all, of these tests go on to check
>> that the resource was actually deleted but do so in different ways.
>> Sometimes they go into a timeout loop waiting for a GET on the object to
>> fail. Sometimes they immediately call DELETE again or GET and assert
>> that it fails. According to what I can see about the HTTP "spec", 204
>> should mean that the object was deleted. So is waiting for something to
>> disappear unnecessary? Is immediate assertion wrong? Does this behavior
>> vary service to service? We should be as consistent about this as
>> possible but I am not sure what the expected behavior of all services
>> actually is.
> The main problem I've seen is that while the resource is deleted, it 
> stays in a deleting state for some time, and quotas don't get adjusted 
> until the server is finally set to a terminated status.
So you are talking about nova here. In tempest I think we need to more 
clearly distinguish when delete is being called to test the delete api 
vs. as part of some cleanup. There was an irc discussion related to this 
recently.  The question is, if I do a delete and get a 204, can I expect 
that immediately doing another delete or get will fail? And that 
question needs an answer for each api that has delete in order to have 
proper tests for delete.

> Best,
> -jay
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