OpenStack Compute (nova)

os api 1.1 metadata incorrect serialization in json

Asked by Yurij on 2011-04-13

It is not understandable why metadata is serialized on get operation in such string
{
    "metadata" : {
        "values" : {
            "Server Label" : "Web Head 1",
        }
    }
}
on update in
{
    "metadata" : {
            "Server Label" : "Web Head 2"
        }
}
and one item is serialized
{
    "meta" : {
            "Server Label" : "Web Head 1"
        }
}

Is it final version of json rendering format for metadata?

Question information

Language:: English Edit question

Status:: Answered

For:: OpenStack Compute (nova) Edit question

Assignee:: No assignee Edit question

Last query:: 2011-04-13

Last reply:: 2011-04-14

This question was originally filed as bug #760037.

Revision history for this message

Dan Prince (dan-prince) said on 2011-04-14:

Hi Yuri,

The metadata JSON is roughly based on the beta draft of the Openstack API spec. For the most part the spec was followed with the exception of "values" (which we call collections). I don't think we implemented any of the collections json for the cactus release. To be honest as we got into the implementation I wasn't a big fan of the 'meta' vs. 'metadata' differences in the draft specification.

The beta draft of the spec is available here:

http://docs.openstack.org/openstack-compute/developer/cs-devguide.pdf

Additionally we do plan on discussing some of the formatting issues at the upcoming dev conference.