Comment 24 for bug 1526403

Reviewed: https://review.openstack.org/256366
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=8fe320753c10ede6445781cc884cadc2bc235ea5
Submitter: Jenkins
Branch: master

commit 8fe320753c10ede6445781cc884cadc2bc235ea5
Author: vsaienko <email address hidden>
Date: Fri Dec 11 12:05:59 2015 +0200

    Update Ironic VM network connection

    When VM is dirrectly connected to OVS (current setup) there is no port
    in OVS when VM is in powered off state. Since Ironic plug port to
    network when VM is in powered-off state. Port should be present in OVS
    even when VM is powered-off.

    This patch adds additional network bridge called br-$VM_NAME for each
    VM. Adds additional interface ovs-$VM_NAME which is added to both OVS
    and br-$VM_NAME. And configures VM NIC in br-$VM_NAME instead of direct
    connection to OVS switch.

    Now connection looks like:

                   Linux Bridge OVS
     -------- ----------- ---------
     | vm-1 | <--> | br-vm-1 | <---> | br-bm |
     -------- ----------- ---------

    Change-Id: I317dd9429684a14d16ecf2887d45c2b014e36a84
    Partial-bug: #1526403