Comment 2 for bug 1421370

Reviewed: https://review.openstack.org/155460
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=bf75b8709b93cc41779f538249347a0dd07b6b14
Submitter: Jenkins
Branch: master

commit bf75b8709b93cc41779f538249347a0dd07b6b14
Author: Devananda van der Veen <email address hidden>
Date: Thu Feb 12 11:38:04 2015 -0800

    Correctly rebuild the PXE file during takeover of ACTIVE nodes

    During a conductor take-over, eg. from another failed conductor, it
    rebuilds the PXE configuration of nodes that are mapped to it. This
    calls node.driver.deploy.prepare(). However, in the PXE driver,
    prepare() was not properly handling the case where it was called on a
    node with an ACTIVE deploy state.

    In such a situation, prepare() needs to switch from the "deploy" config
    to the "boot" config. Furthermore, the PXE boot file must specify the
    node's root disk UUID. This was previously not available outside of the
    _continue_deploy() method, and so is now saved on
    node.driver_internal_info when the initial deploy is completed.

    Co-Authored-By: David Shrewsbury <email address hidden>
    Co-Authored-By: Chris Krelle <email address hidden>
    Change-Id: I6adc65b756e22c5c78d30231187fe2e8ccf2594d
    Closes-bug: #1421370