Versioned RPC APIs

Registered by Russell Bryant on 2012-04-21

The existing rpc API is pretty lightweight and seems to work quite well. One
limitation is that there is nothing provided to help with different versions of
services talking to each other. It may work … or it may not. If it doesn’t,
the failure you get could be something obvious, or it could be something really
bad and bizarre where an operation fails half-way through, leaving things in a
bad state.

The end goal with this effort will be to make sure that as you upgrade from
Essex to Folsom, any messages originating from an Essex service can and will be
correctly processed by a Folsom service. If that fails, then the failure
should be immediate and obvious that a message was rejected due to a version
issue.

Blueprint information

Status:
Complete
Approver:
Vish Ishaya
Priority:
Essential
Drafter:
Russell Bryant
Direction:
Approved
Assignee:
Russell Bryant
Definition:
Approved
Series goal:
Accepted for folsom
Implementation:
Implemented
Milestone target:
milestone icon 2012.2
Started by
Russell Bryant on 2012-04-25
Completed by
Thierry Carrez on 2012-05-23

Related branches

Sprints

Whiteboard

https://github.com/russellb/nova/tree/bp/versioned-rpc-apis

Gerrit topic: https://review.openstack.org/#q,topic:bp/versioned-rpc-apis,n,z

Addressed by: https://review.openstack.org/7386
    Add base support for rpc API versioning.

Addressed by: https://review.openstack.org/7387
    Add version to the cert rpc API.

Addressed by: https://review.openstack.org/7388
    Add version to consoleauth rpc API.

Addressed by: https://review.openstack.org/7389
    Add version to console rpc API.

Addressed by: https://review.openstack.org/7390
    Add version to scheduler rpc API.

Addressed by: https://review.openstack.org/7391
    Add version to compute rpc API.

QA:
----
Internal - Services able to handle multiple versioned client requests
Test Impact - None

(?)

Work Items

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