I'm tempted to consider such HTTP headers modification as a feature as per the Nova policy about bugs vs. features, hence the Wishlist importance.
I also wonder if it would be better to rather create a blueprint in https://blueprints.launchpad.net/nova/ and add a new spec if it needs an API microversion. Given it's possibly something the API SIG would be discussed before Nova, let's invalid now for Nova that bug report, and ask to create the Nova blueprint only after the API SIG discussed that and has a consensus. ** Changed in: nova Status: New => Confirmed ** Changed in: nova Importance: Undecided => Wishlist ** Changed in: nova Status: Confirmed => Incomplete ** Changed in: nova Status: Incomplete => Invalid -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1747935 Title: Openstack APIs and RFC 7234 HTTP caching Status in OpenStack Compute (nova): Invalid Status in openstack-api-sig: Confirmed Bug description: Description =========== I recently hit an issue where I was using Terraform through an HTTP proxy (enforced by my company IT) to provision some resources in an Openstack cloud. Since creating the resources took some time, the initial response from openstack was "still creating...". Further polling of the resource status resulted in receiving *cached* copies of "still creating..." from the proxy until time-out. RFC7234 that describes HTTP caching states that in absence of all headers describing the lifetime/validity of the response, heuristic algorithms may be applied by caches to guesstimate an appropriate value for the validity of the response... (Who knows what is implemented out there...) See: the HTTP caching RFC section 4.2.2 <https://tools.ietf.org/html/rfc7234#section-4.2.2>. The API responses describe the current state of an object which isn't permanent, but has a limited validity. In fact very limited as the state of an object might change any moment. Therefore it is my opinion that the Openstack API (Nova in this case, but equally valid for all other APIs) should be responsible to include proper HTTP headers in their responses to either disallow caching of the response or at least limit it's validity. See the HTTP caching RFC section 5 <https://tools.ietf.org/html/rfc7234#section-5> for headers that could be used to accomplish that. For sake of completeness; also see https://github.com/gophercloud/gophercloud/issues/727 for my initial client-side fix and related discussion with client-side project owners... Expected result =============== Openstack APIs to include header(s) from RFC7234 section 5 <https://tools.ietf.org/html/rfc7234#section-5> to either disallow caching or to specify a meaningful lifetime or to force/implement revalidation options. Actual result ============= No headers controlling caching present whatsoever. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1747935/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
