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[OpenStack Infra <1846494@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/688304
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=4d52b903eb0745296c4e71eebd3db13d17aeede7
Submitter: Zuul
Branch:    master

commit 4d52b903eb0745296c4e71eebd3db13d17aeede7
Author: SapanaJadhav <sapanajadhav555@xxxxxxxxx>
Date:   Sun Oct 13 20:46:57 2019 +0530

    Adding check for IPv6 address in setup_controllers
    
    If it is IPv6 then adding [] to it before
    creating the connection string.
    
    Change-Id: Idd108cbef944cdd89808bb1ad5c8ab1db202d31a
    Closes-Bug: #1846494


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

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https://bugs.launchpad.net/bugs/1846494

Title:
  neutron-openvswitch-agent and IPv6

Status in neutron:
  Fix Released

Bug description:
  I got two problems connected to IPv6 and neutron-openvswitch-agent
  (Queens version of Openstack, Ubuntu 18.04):

  The first problem:

  The default value of "of_listen_address" (setting in [ovs] section in
  file /etc/neutron/plugins/ml2/openvswitch_agent.ini) is 127.0.0.1.

  When I set it to its IPv6 equivalent "::1", it tries to pass that to
  ovs-vswitchd as "tcp:::1:6633", which is not valid URL according IPv6.
  As result ovs-vswitchd complains about that.

  When I set value to "[::1]" with idea the result to be valid URL
  "tcp:[::1]:6633", I got following exception:

    File "/usr/lib/python2.7/dist-packages/oslo_config/cfg.py", line 3378, in __getattr__
      return self._conf._get(name, self._group)
    File "/usr/lib/python2.7/dist-packages/oslo_config/cfg.py", line 2940, in _get
      value = self._do_get(name, group, namespace)
    File "/usr/lib/python2.7/dist-packages/oslo_config/cfg.py", line 2983, in _do_get
      % (opt.name, str(ve)))
  oslo_config.cfg.ConfigFileValueError: Value for option of_listen_address is not valid: [::1] is not IPv4 or IPv6 address

  So the composing of URL with "of_listen_address" and "of_listen_port"
  for version IPv6 is not done correctly.

  The second problem:

  When I try to set "ovsdb_connection = tcp:[::1]:6640", again in
  "openvswitch_agent.ini", in logs I see neutron try to set manager as
  "ovs-vsctl set-manager ptcp::1]:6640:[". But I do not keep exact steps
  for reproduction.

  Also (just in case) I tried to set "ovsctl set-manager
  ptcp:6640:[::1]" , again in "openvswitch_agent.ini", but as expected I
  got follow error:

  ovs-vsctl[1957]: ovs|00001|vsctl|INFO|Called as /usr/bin/ovs-vsctl set-manager ptcp:6640:[::1]
  ovs-config.py[1962]: configobj.ParseError: Invalid line ('ovs-vsctl set-manager ptcp:6640:[::1]') (matched as neither section nor keyword) at line 58.

  So obviously it is for starting of server, not value for the ini file.

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