Comment 8 for bug 1585325

Reviewed: https://review.openstack.org/324721
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible/commit/?id=a2adac22216686c38a2dca6992d41cea9090f992
Submitter: Jenkins
Branch: liberty

commit a2adac22216686c38a2dca6992d41cea9090f992
Author: Matthew Thode <email address hidden>
Date: Wed Jun 1 23:14:36 2016 -0500

    Create symlink for libvirt save directory

    Nova can fill up the partition that /var/lib/libvirt/qemu/save is on
    when nova calls `image-create` on an instance. This occurs because nova
    calls libvirt with managedsave which creates a temporary file in the
    /var/lib/libvirt/qemu/save location. Libvirt does not allow the location
    of /var/lib/libvirt/qemu/save to be configurable so we have to manage it
    ourselves via bindmounts or symlinks. In this commit we remove the
    /var/lib/libvirt/qemu/save directory and create a symlink in it's place,
    pointing to `{{ nova_system_home_folder }}/save` instead (which we also
    create). This location was chosen as deployers often have more space
    here for nova instances.

    Change-Id: I5c96f70aa355cc02379fe7e0681416eca53447eb
    Partial-Bug: #1585325