Instance nics are reorder after reboot

[David Scannell]

Suppose I have 3 networks: a_network, g_network and z_network. When booting a new instance, through Horizon, I assign the networks are such: nic1=g_network, nic2=a_network and nic3=z_network. After the instance has been booted, I login and verify that all of the nics are assigned accordingly.

Now I reboot the instance from Horizon. After the instance reboots I login and notice that nic1 is on the a_network, nic2 is on z_network and nic3 is on the g_network.

I would have suspected that after rebooting the instance its nic to network mapping would have remained the same.

Environment:
  * Nova version: Grizzly
  * Quantum for networking

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/35561

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/grizzly
Review: https://review.openstack.org/37150

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/35561
Committed: http://github.com/openstack/nova/commit/bcd12a776e8cde8c4b64e7c1a21a7387ece55b31
Submitter: Jenkins
Branch: master

commit bcd12a776e8cde8c4b64e7c1a21a7387ece55b31
Author: Aaron Rosen <email address hidden>
Date: Tue Jul 9 14:35:17 2013 -0700

    Fix nic order not correct after reboot

    Previously if an instance was rebooted or migrated the original nic order
    would not be maintained. This patch retrieves the correct nic order from
    info_cache so that the order is mantained.

    Fixes bug 1187092

    Change-Id: I3f5488cc14c692fde7d5bd3376389e2f2f5550ff

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/37150
Committed: http://github.com/openstack/nova/commit/45fd6be08a04bc49dbc5c7fd67cdc7defb889284
Submitter: Jenkins
Branch: stable/grizzly

commit 45fd6be08a04bc49dbc5c7fd67cdc7defb889284
Author: Aaron Rosen <email address hidden>
Date: Mon Jul 15 17:32:43 2013 -0700

    Fix nic order not correct after reboot

    Previously if an instance was rebooted or migrated the original nic order
    would not be maintained. This patch retrieves the correct nic order from
    info_cache so that the order is mantained.

    Fixes bug 1187092

    Change-Id: I3f5488cc14c692fde7d5bd3376389e2f2f5550ff
    (cherry picked from commit bcd12a776e8cde8c4b64e7c1a21a7387ece55b31)