Comment 19 for bug 1526403

Reviewed: https://review.openstack.org/285852
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=cde11611d93946a1c79e406dc429aa5e742da729
Submitter: Jenkins
Branch: master

commit cde11611d93946a1c79e406dc429aa5e742da729
Author: Vasyl Saienko <email address hidden>
Date: Tue May 17 13:59:39 2016 +0300

    Add network interface to base driver class

    This change also introduces two network interfaces:

    * flat: Copies current neutron DHCP provider logic to work with
      cleaning ports;
    * noop: noop interface.

    The default value of the network_interface is None, meaning that the
    node will be using the default network interface. The default network
    interface is determined the following way:

    * if [DEFAULT]default_network_interface configuration option is set
      (the default for it is None), the specified interface becomes the
      default for all nodes;

    * if it is not set, 'flat' interface will be used if the deployment
      currently uses 'neutron' DHCP provider, otherwise 'noop' interface
      will be used.

    create_cleaning_ports and delete_cleaning_ports methods of the DHCP
    providers are still being called in case of out-of-tree DHCP
    providers, but this possibility will be removed completely in the
    next release. If the DHCP provider logic is rewritten into a custom
    network interface, please remove those methods from the provider, so
    that network interface is called instead.

    Partial-bug: #1526403
    Co-Authored-By: Om Kumar <email address hidden>
    Co-Authored-By: Vasyl Saienko <email address hidden>
    Co-Authored-By: Sivaramakrishna Garimella <email address hidden>
    Co-Authored-By: Vladyslav Drok <email address hidden>
    Co-Authored-By: Zhenguo Niu <email address hidden>
    Change-Id: I0c26582b6b6e9d32650ff3e2b9a3269c3c2d5454