[openstack-dev] [nova][glance] Consistency around proposed server instance tagging API

Davanum Srinivas davanum at gmail.com
Thu Jun 5 00:48:37 UTC 2014

+1 to 404 for a DELETE if the tag does not exist.

There's a good discussion in this paragraph from "RESTful Web APIs"
book - http://books.google.com/books?id=wWnGAAAAQBAJ&lpg=PA36&ots=Ff9jCI293b&dq=restful%20http%20delete%20404%20sam%20ruby&pg=PA36#v=onepage&q=restful%20http%20delete%20404%20sam%20ruby&f=false

-- dims

On Wed, Jun 4, 2014 at 8:21 PM, Christopher Yeoh <cbkyeoh at gmail.com> wrote:
> On Thu, Jun 5, 2014 at 4:14 AM, Jay Pipes <jaypipes at gmail.com> wrote:
>> Hi Stackers,
>> I'm looking to get consensus on a proposed API for server instance tagging
>> in Nova:
>> https://review.openstack.org/#/c/91444/
>> In the proposal, the REST API for the proposed server instance tagging
>> looks like so:
>> Remove a tag on a server:
>> DELETE /v2/{project_id}/servers/{server_id}/tags/{tag}
>> It is this last API call that has drawn the attention of John Garbutt
>> (cc'd). In Glance v2 API, if you attempt to delete a tag that does not
>> exist, then a 404 Not Found is returned. In my proposal, if you attempt to
>> delete a tag that does not exist for the server, a 204 No Content is
>> returned.
> I think attempting to delete a tag that doesn't exist should return a 404.
> The user can always ignore the error if they know there's a
> chance that the tag they want to get rid of doesn't exist. But for those
> that believe it should exist its an error is more useful to them as
> it may be an indicator that something is wrong with their logic.
> Chris
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Davanum Srinivas :: http://davanum.wordpress.com

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