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[OpenStack Infra <1796593@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/608468
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=85588ad38e3a08137f4f7b4be98ce271064eb2f0
Submitter: Zuul
Branch:    master

commit 85588ad38e3a08137f4f7b4be98ce271064eb2f0
Author: aojeagarcia <aojeagarcia@xxxxxxxx>
Date:   Sun Oct 7 23:17:08 2018 +0200

    Allow Ipv6 addresses for nova_metadata_host
    
    Current logic didn't check if the nova_metadata_host is an IPv6 address
    causing the proxy request to fail with an exception because the url is
    not valid.
    
    This patchs check if the nova_metadata_host is an IPv6 address and
    create a valid url enclosing the IPv6 address with brackets
    
    Closes-Bug: #1796593
    
    Change-Id: Ibfebffcec2c8860237a1f151084de978a7863bd8
    Signed-off-by: aojeagarcia <aojeagarcia@xxxxxxxx>


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

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https://bugs.launchpad.net/bugs/1796593

Title:
  metadata agent can't use ipv6 addresses for nova_metadata_host

Status in neutron:
  Fix Released

Bug description:
  It's a known issue that metadata services don't work for ipv6-only
  tenant networks [1]

  However, it can be possible that operators want to use ipv4 and ipv6
  tenant networks with an underlay ipv6 infra.

  This doesn't work as you can see in the devstack failure [2] because
  the metadata agent, when building the request, doesn't check if the
  nova_metadata_host is an ipv6 address to add the corresponding square
  brackets [3].

  
  [1] https://bugs.launchpad.net/neutron/+bug/1460177
  [2] http://logs.openstack.org/68/608168/5/check/tempest-full-py3/d2321db/controller/logs/screen-q-meta.txt.gz#_Oct_07_18_00_37_770322
  [3] https://github.com/openstack/neutron/blob/3e579256a36e66960495da2f303b5a6e37f644a6/neutron/agent/metadata/agent.py#L180

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