Expose libvirt-flags to modify libvirt section.

Question - what's the context for configuring this libvirt section option?

Is this required when deploying with a certain set of charms? If so we should not rely on configuration options on the charm todo this sort of thing.

@james-page,

I think this is just a helper configuration option intended to populate the libvirt section.

You can see the full list of configuration options available for the libvirt section here (Kilo) (http://docs.openstack.org/kilo/config-reference/content/list-of-compute-config-options.html)

On my particular case I need to modify iscsi_iface , use_virtio_for_bridges and iscsi_use_multipath options.

@Jorge,

The fix was proposed to bzr branch some time ago. Are you still going to work on it to rebase to the current git branch? I think this feature is sill valid and nice to have.

Reviewed: https://review.openstack.org/521920
Committed: https://git.openstack.org/cgit/openstack/charm-nova-compute/commit/?id=5cd89001031d205f38da3fcc4e921bbe42fbc8ac
Submitter: Zuul
Branch: master

commit 5cd89001031d205f38da3fcc4e921bbe42fbc8ac
Author: Shane Peters <email address hidden>
Date: Tue Nov 21 11:16:20 2017 -0500

    Enable support for iscsi multipath connections

    Adds new charm config option to enable multipath
    connections to iscsi volumes. This is configured
    in the [libvirt] section of the nova config.

    Since newton, the option has been renamed to
    'volume_use_multipath'. To accomodate this,
    a newton template has been created.

    Change-Id: Ibbf91547c5fc41215873c63219cd83303b1d37cd
    Partial-Bug: #1518001