[openstack-dev] [nova] API priorities in Newton

Ken'ichi Ohmichi ken1ohmichi at gmail.com
Thu Mar 31 16:35:22 UTC 2016

2016-03-30 12:26 GMT-07:00 Sean Dague <sean at dague.net>:
> One other issue that we've been blocking on for a while has been
> Capabilities discovery. Some API proposed adds like live resize have
> been conceptually blocked behind this one. Once upon a time there was a
> theory that JSON Home was a thing, and would slice our bread and julien
> our fries, and solve all this. But it's a big thing to get right, and
> JSON Home has an unclear future. And, we could server our users pretty
> well with a much simpler take on capabilities. For instance
>  GET /servers/{id}/capabilities
> {
>     "capabilities" : {
>         "resize": True,
>         "live-resize": True,
>         "live-migrate": False
>         ...
>      }
> }

Yeah, JSOM-Home is not an option for this kind of capabilities discovery.
Swagger is that instead. Clients can know available capabilities by
getting swagger definition via REST API.


GET /swaggers
    "/action": {
       "parameters": [
           {"name": "resize", "in": "body", ...},
           {"name": "os-start", "in": "body", ...},
           {"name": "os-stop", "in": "body", ...},


More information about the OpenStack-dev mailing list