Comment 48 for bug 1387543

Reviewed: https://review.openstack.org/209856
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=b5020a047fc487f35b76fc05f31e52665a1afda1
Submitter: Jenkins
Branch: stable/kilo

commit b5020a047fc487f35b76fc05f31e52665a1afda1
Author: abhishekkekane <email address hidden>
Date: Mon Jul 6 01:51:26 2015 -0700

    libvirt: Kill rsync/scp processes before deleting instance

    In the resize operation, during copying files from source to
    destination compute node scp/rsync processes are not aborted after
    the instance is deleted because linux kernel doesn't delete instance
    files physically until all processes using the file handle is closed
    completely. Hence rsync/scp process keeps on running until it
    transfers 100% of file data.

    Added new module instancejobtracker to libvirt driver which will add,
    remove or terminate the processes running against particular instances.
    Added callback methods to execute call which will store the pid of
    scp/rsync process in cache as a key: value pair and to remove the
    pid from the cache after process completion. Process id will be used to
    kill the process if it is running while deleting the instance. Instance
    uuid is used as a key in the cache and pid will be the value.

    Conflicts:
            nova/virt/libvirt/driver.py

    SecurityImpact

    Closes-bug: #1387543
    Change-Id: Ie03acc00a7c904aec13c90ae6a53938d08e5e0c9
    (cherry picked from commit 7ab75d5b0b75fc3426323bef19bf436a258b9707)