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[OpenStack Infra <1774217@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/571577
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=d632c4cfc43c3ba38657af3d35f124c918d82c5c
Submitter: Zuul
Branch:    master

commit d632c4cfc43c3ba38657af3d35f124c918d82c5c
Author: Matt Riedemann <mriedem.os@xxxxxxxxx>
Date:   Thu May 31 17:25:37 2018 -0400

    Mention running rootwrap in daemon mode if hitting vif plug timeouts
    
    Per an operators mailing list thread [1] people can hit vif
    plug timeouts at scale and a possible solution is running
    rootwrap in daemon mode in the neutron agent, which several
    operators have said resolves the issue at scale for them.
    
    This change adds a mention of that configuration in the
    "vif_plugging_timeout" configuration option since that
    might be the first place operators look when they start
    hitting this issue.
    
    A corresponding change will be made to neutron to improve
    the config option help text for the "root_helper_daemon"
    option.
    
    [1] http://lists.openstack.org/pipermail/openstack-operators/2018-May/015364.html
    
    Change-Id: I65c0d518bc1c1a0d94fa7ac01294b03cce7d3752
    Closes-Bug: #1774217


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1774217

Title:
  docs: vif_plugging_timeout nova config option should mention running
  neutron rootwrap in daemon mode for performance

Status in neutron:
  Fix Released
Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  There are notes from this operators mailing list thread about how the
  neutron agent needed to be configured for rootwrap daemon mode to hit
  scale targets otherwise servers would fail to create due to vif
  plugging timeouts:

  http://lists.openstack.org/pipermail/openstack-
  operators/2018-May/015364.html

  This bug is used to track the documentation updates needed in both
  nova and neutron.

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