Comment 8 for bug 1500615

Reviewed: https://review.openstack.org/228980
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=9bb4c07b2996aa9e3153e6d6f28e7aa600c64100
Submitter: Jenkins
Branch: master

commit 9bb4c07b2996aa9e3153e6d6f28e7aa600c64100
Author: Matt Riedemann <email address hidden>
Date: Tue Sep 29 07:21:19 2015 -0700

    Add checkpoint logging when building an instance in compute manager

    When the large ops job fails because instances timeout during the build,
    it's hard to know what is going on for a given instance in the compute
    manager's _do_build_and_run_instance flow since a lot of the trace
    logging that happens is in the virt drivers.

    The large ops job uses the fake virt driver which doesn't do much
    logging at all. Rather than add logging to the fake virt driver, it'd be
    useful to add some logging to the compute manager when we are doing
    sub-tasks like building networks, building bdms, and spawning the instance
    on the hypervisor.

    Per: https://wiki.openstack.org/wiki/LoggingStandards

    The 'Starting instance' log message is changed to debug level and the
    completed task logging unit of work messages with time spent are done at
    info level.

    Related-Bug: #1500615

    Change-Id: I6b9e7fc7b3a14ccf8b1531fa08ce8d732e23775a