LBaaS: unify haproxy-on-host plugin driver and agent

[OpenStack Infra]

https://review.openstack.org/40381
commit bf8949defc24af3636da417442469e7d7194c7b3
Author: Oleg Bondarev <email address hidden>
Date: Tue Aug 6 12:52:34 2013 +0400

    LBaaS: unify haproxy-on-host plugin driver and agent

    Unifies haproxy reference implementation to make common agent based plugin driver
    which is suitable for all vendors who wants to use async mechanism.

     - Agent API as well as device driver API changed to handle
       loadbalancer objects individually;
     - Agent loads device drivers according to config;
     - LogicalDeviceCache class was removed from agent as it was used only
       as a list - to put and remove entries ant check whether entry is in or not.
       It was replaced with instance_mapping dict in agent to store known instances and
       corresponding device_drivers;
     - Agent reports which device drivers are supported (needs for scheduling on plugin side);
     - Agent-to-plugin API was extended to provide an ability for agent to update
       statuses of pools/vips/members/health_monitors;
     - Vendor should only implement device driver; plugin driver just needs
       to inherit AgentBasedPluginDriver and override device_driver member;
     - This patch doesn't move files to make review easier;
       all rename/replace will be done in a subsequent patch;

    DocImpact

    NOTE: Since the change in the agent RPC API is backward-incompatible
    (major RPC version change), LBaaS server-agent communications will be
    completely broken until both sides are upgraded so users will be unable to
    create new or update existing HAProxy loadbalancer instances during upgrade

    Implements blueprint lbaas-common-agent-driver

    Change-Id: I9fd90a1321611d202ef838681273081fa6c1686a

[Oleg Bondarev (obondarev)]

The change in LBaaS affects only internal server-agent RPC API which is not exposed in any docs so I believe there is nothing to add/fix in openstack-api-site

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/80556

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/80556
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=25d1b886307ff67f66825b80d123098eca2150fe
Submitter: Jenkins
Branch: master

commit 25d1b886307ff67f66825b80d123098eca2150fe
Author: Oleg Bondarev <email address hidden>
Date: Fri Mar 14 16:58:44 2014 +0400

    LBaaS: add note about Havana->Icehouse upgrade

    Change-Id: Id7bf58e3259c4726f4ed53a22019a645d59be719
    Closes-Bug: #1259576

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.