Neutron agents won't pick up neutron-ns-metadata-proxy after I->J upgrade

[Miguel Angel Ajo]

The pid file path changes from %s.pid to %s/pid during juno, due to this change:

https://github.com/openstack/neutron/commit/7f8ae630b87392193974dd9cb198c1165cdec93b#diff-448060f24c6b560b2cbac833da6a143dL68

That means the l3-agent and dhcp-agent (when isolated metadata is enabled)
will respawn a second neutron-ns-metadata proxy on each namespace/resource
after upgrade (I->J) and agent restart due the inability to find the old PID
file and external process PID.

[Miguel Angel Ajo (mangelajo)]

I'm working to get this fixed before J release.

[Salvatore Orlando (salvatore-orlando)]

This is critical for upgrades. With ajo we confirmed the metadata service stops working after upgrade.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/125349

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/125349
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=20dbbab61c1159a3dc6ef838ec65b04f7e9cf560
Submitter: Jenkins
Branch: master

commit 20dbbab61c1159a3dc6ef838ec65b04f7e9cf560
Author: Miguel Angel Ajo <email address hidden>
Date: Wed Oct 1 15:16:19 2014 +0200

    Fix pid file location to avoid I->J changes that break metadata

    Changes in commit 7f8ae630b87392193974dd9cb198c1165cdec93b moved
    pid files handled by agent/linux/external_process.py from
    $state_path/external/<uuid>.pid to $state_path/external/<uuid>/pid
    that breaks the neutron-ns-metadata-proxy respawn after upgrades
    becase the l3 or dhcp agent can't find the old pid file so
    they try to start a new neutron-ns-metadata-proxy which won't
    succeed, because the old one is holding the port already.

    Closes-Bug: #1376128
    Change-Id: Id166ec8e508aaab8eea35d89d010a5a0b7fdba1f

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: feature/lbaasv2
Review: https://review.openstack.org/130864

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/130864
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=c089154a94e5872efc95eab33d3d0c9de8619fe4
Submitter: Jenkins
Branch: feature/lbaasv2

commit 62588957fbeccfb4f80eaa72bef2b86b6f08dcf8
Author: Kevin Benton <email address hidden>
Date: Wed Oct 22 13:04:03 2014 -0700

    Big Switch: Switch to TLSv1 in server manager

    Switch to TLSv1 for the connections to the backend
    controllers. The default SSLv3 is no longer considered
    secure.

    TLSv1 was chosen over .1 or .2 because the .1 and .2 weren't
    added until python 2.7.9 so TLSv1 is the only compatible option
    for py26.

    Closes-Bug: #1384487
    Change-Id: I68bd72fc4d90a102003d9ce48c47a4a6a3dd6e03

commit 17204e8f02fdad046dabdb8b31397289d72c877b
Author: OpenStack Proposal Bot <email address hidden>
Date: Wed Oct 22 06:20:15 2014 +0000

    Imported Translations from Transifex

    For more information about this automatic import see:
    https://wiki.openstack.org/wiki/Translations/Infrastructure

    Change-Id: I58db0476c810aa901463b07c42182eef0adb5114

commit d712663b99520e6d26269b0ca193527603178742
Author: Carl Baldwin <email address hidden>
Date: Mon Oct 20 21:48:42 2014 +0000

    Move disabling of metadata and ipv6_ra to _destroy_router_namespace

    I noticed that disable_ipv6_ra is called from the wrong place and that
    in some cases it was called with a bogus router_id because the code
    made an incorrect assumption about the context. In other case, it was
    never called because _destroy_router_namespace was being called
    directly. This patch moves the disabling of metadata and ipv6_ra in
    to _destroy_router_namespace to ensure they get called correctly and
    avoid duplication.

    Change-Id: Ia76a5ff4200df072b60481f2ee49286b78ece6c4
    Closes-Bug: #1383495

commit f82a5117f6f484a649eadff4b0e6be9a5a4d18bb
Author: OpenStack Proposal Bot <email address hidden>
Date: Tue Oct 21 12:11:19 2014 +0000

    Updated from global requirements

    Change-Id: Idcbd730f5c781d21ea75e7bfb15959c8f517980f

commit be6bd82d43fbcb8d1512d8eb5b7a106332364c31
Author: Angus Lees <email address hidden>
Date: Mon Aug 25 12:14:29 2014 +1000

    Remove duplicate import of constants module

    .. and enable corresponding pylint check now the only offending instance
    is fixed.

    Change-Id: I35a12ace46c872446b8c87d0aacce45e94d71bae

commit 9902400039018d77aa3034147cfb24ca4b2353f6
Author: rajeev <email address hidden>
Date: Mon Oct 13 16:25:36 2014 -0400

    Fix race condition on processing DVR floating IPs

    Fip namespace and agent gateway port can be shared by multiple dvr routers.
    This change uses a set as the control variable for these shared resources
    and ensures that Test and Set operation on the control variable are
    performed atomically so that race conditions do not occur among
    multiple threads processing floating IPs.
    Limitation: The scope of this change is limited to addressing the race
    condition described in the bug report. It may not address other issues
    such as pre-existing issue wit...