Blazar

Introduce Blazar objects

Registered by Sylvain Bauza

Summary
========

Object is necessary for Blazar in order to provide a defined interface in between the
Manager and DB. The object will have tenancy information so that it should enforce
policies on a safer way. That will also allow us to perform HA easier as it will reduce the DB locking problem, and it will also allow RPC interfaces to define a path for DB upgrades.

See https://wiki.openstack.org/wiki/ObjectProposal for the motivation

Problem description
================

TBD

Use Cases
---------------
TBD

Proposed change
==============

TBD

Alternatives
-----------------
TBD

Data model impact
--------------------------
TBD

REST API impact
------------------------
TBD

Security impact
----------------------
TBD

Notifications impact
----------------------------
TBD

Other end user impact
--------------------------------
TBD

Performance impact
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None.

Other deployer impact
--------------------------------
TBD

Developer impact
---------------------------
TBD

Dependencies
===========

TBD

Testing
======
TBD

Documentation impact
==================
TBD

References
=========

[1] https://github.com/openstack/nova-specs/blob/master/specs/pike-template.rst
[2] https://github.com/openstack/openstack-user-stories/blob/master/user-stories/proposed/capacity-management.rst

Note: this form is based on the nova-specs template[1].

Blueprint information

Status:
Complete
Approver:
None
Priority:
Low
Drafter:
Sylvain Bauza
Direction:
Needs approval
Assignee:
None
Definition:
Obsolete
Series goal:
None
Implementation:
Not started
Milestone target:
milestone icon next
Completed by
Pierre Riteau

Related branches

Sprints

Whiteboard

History:

We can implement HA without this feature. Central core services will give events processing to workers. Central ones will use DB transactions and change event state tile:

with session:
    task = session.query(Task).filter(state=NEW).first()
    task['state'] = TAKEN

And there will be no race conditions here because of transactions.

So this BP on current code state is not worth efforts spent on it. There are lots of other things to do....

(?)

Work Items

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