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[OpenStack Infra <1507950@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/237618
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=dc0c7b5588409fe64d7680e94f50279ab9ec4043
Submitter: Jenkins
Branch:    master

commit dc0c7b5588409fe64d7680e94f50279ab9ec4043
Author: Hong Hui Xiao <xiaohhui@xxxxxxxxxx>
Date:   Tue Oct 20 05:31:46 2015 -0400

    Delete metadata_proxy for network if it is not needed
    
    Currently, once the metadata_process is created for the network,
    it will never be eliminated unless the network is deleted. Even if
    user disable the metadata for network and restart dhcp agent, the
    metdata proxy for network will still be there. This will waste the
    resource of neutron host. This patch will let the dhcp-agent
    delete useless metadata_proxy at startup.
    
    Additional functional tests are added to for related scenario.
    
    Change-Id: Id867b211fe7c01a11ba73a5ebc275c595933becf
    Closes-Bug: #1507950


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

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https://bugs.launchpad.net/bugs/1507950

Title:
  The metadata_proxy for a network will never be deleted even if it is
  not needed.

Status in neutron:
  Fix Released

Bug description:
  Find this issue in a large scale test. Steps to reproduce:
  (1) I have about 1000 networks and set enable_isolated_metadata=True firstly.
  (2) But then I find the metadata_proxy process is too many, and I want to  disable it. So I set the enable_isolated_metadata=False.
  (3) restart dhcp-agent
  (4) The metdata_proxy are still there.

  To eliminate the metadata_proxy process for networks, it looks like
  that I can delete the networks or kill the metadata_proxy process
  manually(or just restart the host).  And, obviously, I want to keep
  the networks.

  neutron-dhcp-agent should try to kill the useless metadata_proxy to
  keep the neutron host clean and with less burden.

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