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[OpenStack Infra <1661303@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/428504
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=33129f2ac6a41afe2f59a0d50d5db0257f588a79
Submitter: Jenkins
Branch:    master

commit 33129f2ac6a41afe2f59a0d50d5db0257f588a79
Author: Kevin Benton <kevin@xxxxxxxxxx>
Date:   Thu Feb 2 16:12:40 2017 -0800

    Use bytes for python3 friendly os.write
    
    Bytes not str. Otherwise we get
    TypeError: a bytes-like object is required, not 'str'
    in the metadata proxy and it dies.
    
    Closes-Bug: #1661303
    Change-Id: If6b6f19130c965436a637a03a4cf72203e0786b0


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

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https://bugs.launchpad.net/bugs/1661303

Title:
  neutron-ns-metadata-proxy process failing under python3.5

Status in neutron:
  Fix Released

Bug description:
  When running under python 3.5, we are seeing the neutron-ns-metadata-
  proxy fail repeatedly on Ocata RC1 master.

  This is causing instances to fail to boot under a python3.5 devstack.

  A gate example is here:
  http://logs.openstack.org/99/407099/25/check/gate-rally-dsvm-py35-neutron-neutron-ubuntu-xenial/4741e0d/logs/screen-q-l3.txt.gz?level=ERROR#_2017-02-02_11_41_52_029

  2017-02-02 11:41:52.029 29906 ERROR
  neutron.agent.linux.external_process [-] metadata-proxy for router
  with uuid 79af72b9-6b17-4864-8088-5dc96b9271df not found. The process
  should not have died

  Running this locally I see the debug output of the configuration
  settings and it immediately exits with no error output.

  To reproduce:
  Stack a fresh devstack with the "USE_PYTHON3=True" setting in your localrc (NOTE: There are other python3x devstack bugs that may reconfigure your host in bad ways once you do this.  Plan to only stack with this setting on a throw away host or one you plan to use for Python3.x going forward)

  Once this devstack is up and running, setup a neuron network and
  subnet, then boot a cirros instance on that new subnet.

  Check the cirros console.log to see that it cannot find a metadata
  datasource (Due to this change disabling configdrive:
  https://github.com/openstack-
  dev/devstack/commit/7682ea88a6ab8693b215646f16748dbbc2476cc4).

  Check the q-l3.txt log to see the repeated "The process should not
  have died" messages.

  You will also note that the cirros instance did not receive it's ssh
  keys and is requiring password login due to the missing datasource.

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