DVR: create or update port by using notify specific host rather than fanout

Fix proposed to branch: master
Review: https://review.openstack.org/214933

Change abandoned by Zhi Chang (<email address hidden>) on branch: master
Review: https://review.openstack.org/214933

Fix proposed to branch: master
Review: https://review.openstack.org/215457

Fix proposed to branch: master
Review: https://review.openstack.org/#/c/215457/

Fix proposed to branch: master
Review: https://review.openstack.org/221209

I tend to think this is an important scaling issue. I bumped it to high for that reason.

hi Carl, can you help to review this patch https://review.openstack.org/221209

Fix proposed to branch: master
Review: https://review.openstack.org/231555

Reviewers are very confused. Which of the three patches [1,2,3] should be considered for this? Will the authors come together and unify on a patch as co-authors at least? We need to abandon any patches that should not be considered and ideally arrive at one as the proposed fix.

[1] https://review.openstack.org/#/c/221209/
[2] https://review.openstack.org/#/c/231555/
[3] https://review.openstack.org/#/c/215457/

Change abandoned by Carl Baldwin (<email address hidden>) on branch: master
Review: https://review.openstack.org/215457
Reason: We discussed in the L3 [1] meeting today that we should abandon this patch in favor of another one [2].

 [1] https://wiki.openstack.org/wiki/Meetings/Neutron-L3-Subteam
 [2] https://review.openstack.org/#/c/231555/

Change abandoned by Carl Baldwin (<email address hidden>) on branch: master
Review: https://review.openstack.org/221209
Reason: We discussed in the L3 [1] meeting today that we should abandon this patch in favor of another one [2].

 [1] https://wiki.openstack.org/wiki/Meetings/Neutron-L3-Subteam
 [2] https://review.openstack.org/#/c/231555/

Reviewed: https://review.openstack.org/231555
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=d3b191984cfe2b24f16bd57c1b4bb8c555ee10e0
Submitter: Jenkins
Branch: master

commit d3b191984cfe2b24f16bd57c1b4bb8c555ee10e0
Author: Oleg Bondarev <email address hidden>
Date: Tue Oct 6 18:14:33 2015 +0300

    DVR: only notify needed agents on new VM port creation

    When a new VM which should be serviced by a DVR router appears
    on compute host, this router is scheduled to that host and
    notification is sent. Before the patch it was a broad notification
    while really we only need to notify agent on target host.
    This should decrease the load on neutron server at scale.

    Closes-Bug: #1486795
    Change-Id: Id48b6f6a71530c4f6092d2a07b2db1a5cd300c05

Fix proposed to branch: stable/kilo
Review: https://review.openstack.org/249864

Fix proposed to branch: stable/liberty
Review: https://review.openstack.org/251439

This issue was fixed in the openstack/neutron 8.0.0.0b1 development milestone.

Change abandoned by Ed Bak (<email address hidden>) on branch: stable/kilo
Review: https://review.openstack.org/249864
Reason: Abandoning backport to Kilo.

Reviewed: https://review.openstack.org/251439
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=b49181abb64f6543d2325602779e0c3de96b202f
Submitter: Jenkins
Branch: stable/liberty

commit b49181abb64f6543d2325602779e0c3de96b202f
Author: Oleg Bondarev <email address hidden>
Date: Tue Oct 6 18:14:33 2015 +0300

    DVR: only notify needed agents on new VM port creation

    When a new VM which should be serviced by a DVR router appears
    on compute host, this router is scheduled to that host and
    notification is sent. Before the patch it was a broad notification
    while really we only need to notify agent on target host.
    This should decrease the load on neutron server at scale.

    Closes-Bug: #1486795
    (cherry picked from commit d3b191984cfe2b24f16bd57c1b4bb8c555ee10e0)

    Conflicts:

     neutron/tests/functional/services/l3_router/test_l3_dvr_router_plugin.py

    Change-Id: Id48b6f6a71530c4f6092d2a07b2db1a5cd300c05

This issue was fixed in the openstack/neutron 7.0.2 release.