Implement HA manager mechanism

Registered by Dina Belova

Summary
========

Separate schedule (core) and events handling functionality. Exclude events processing
functionality to workers processes. Implement HA possibility for the managers (core
components).

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
-----------------------------
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:
Not started
Approver:
None
Priority:
Low
Drafter:
Dina Belova
Direction:
Needs approval
Assignee:
None
Definition:
Drafting
Series goal:
Accepted for train
Implementation:
Not started
Milestone target:
None

Related branches

Sprints

Whiteboard

Hitsoty:

I think having climate-conductors is necessary for achieving this goal, proposing to implement it - sbauza

(?)

Work Items

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