Use common Oslo service infrastructure

Registered by Brian Elliott

Refactor Nova to use Oslo's Service infrastructure. This includes the Launchers, Service, and ThreadGroup stuff from openstack.common.service.

The code in Oslo is largely copy and pasted from Nova anyway, so it'd be good to get in there and DRY it up.

Blueprint information

Status:
Complete
Approver:
Russell Bryant
Priority:
High
Drafter:
Brian Elliott
Direction:
Approved
Assignee:
Brian Elliott
Definition:
Approved
Series goal:
Accepted for havana
Implementation:
Implemented
Milestone target:
milestone icon 2013.2
Started by
Brian Elliott
Completed by
Russell Bryant

Related branches

Sprints

Whiteboard

https://review.openstack.org/#/c/29256/
https://review.openstack.org/29311

Gerrit topic: https://review.openstack.org/#q,topic:bp/use-oslo-services,n,z

Addressed by: https://review.openstack.org/29673
    Sync service and threadgroup modules from oslo

Addressed by: https://review.openstack.org/29674
    Convert Nova to use Oslo service infrastructure.

(?)

Work Items

Work items:
Modify Oslo Launcher to save backdoor_port number: DONE
Modify Nova init to use Oslo Launcher classes: DONE
Modify Nova Service to be based on common Oslo Service class: DONE
Add existing Nova threads and timers to the Oslo ThreadGroup for common control: DONE

Dependency tree

* Blueprints in grey have been implemented.

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