Non-working tunnels after IP change of nodes (ovs_tunnel_endpoints doesn't clean)

[George Shuklin]

If any OVS-enabled host with GRE tunnes change it IP, neutron do not discard entry in ovs_tunnel_endpoints table and recreate gre-x interfaces in br-tun on every boot.

Expected behavior: automaic removing of entries in ovs_tunnel_endpoints when IP address is changed.

[Eugene Nikanorov (enikanorov)]

I believe this depends on L2 population mechanism driver that should be enabled for such case to be handled properly.

[Romil Gupta (romilg)]

It will be fixed as part of this patch set
https://review.openstack.org/#/c/136106/.

Hence, assigning to myself.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/136106
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=67c4c6d809e4c9e112d9fb848b5bdce9d5cd04ac
Submitter: Jenkins
Branch: master

commit 67c4c6d809e4c9e112d9fb848b5bdce9d5cd04ac
Author: Romil Gupta <email address hidden>
Date: Thu Nov 20 11:32:07 2014 -0800

    Stale VXLAN and GRE tunnel port/flow deletion

    Description:
    Stale GRE and VXLAN tunnel endpoints persists in neutron db this should be
    deleted from the database. Also, if local_ip of L2 agent changes the
    stale tunnel ports and flows persists on br-tun on other Compute Nodes and
    Network Nodes for that remote ip this should also be removed.

    Implementation

    Plugin changes:
    The plugin side changes are covered in following patch-set
    https://review.openstack.org/#/c/121000/.

    Agent changes:
    Added tunnel_delete rpc for removing stale ports and flows from br-tun.
    tunnel_sync rpc signature upgrade to obtain 'host'.
    Added testcases for TunnelRpcCallbackMixin().

    This patch-set agent deals with agent side changes.

    Closes-Bug: #1179223
    Closes-Bug: #1381071
    Closes-Bug: #1276629

    Co-Authored-By: Aman Kumar <email address hidden>
    Co-Authored-By: phanipawan <email address hidden>

    Change-Id: I291992ffde5c3ab7152f0d7462deca2e4ac1ba3f