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[Pawel Koniszewski <pawel.koniszewski@xxxxxxxxx>]

Talked with danpb on IRC and looks like we can use block live migration
in such case, so #1 and #2 are invalid too.

** Changed in: nova
       Status: Triaged => Invalid

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https://bugs.launchpad.net/bugs/1589457

Title:
  live-migration fails for volume-backed  instances with config-drive
  type vfat

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  Description
  ===========

  Volume-backed instances fails to migrate when config-drive is enabled(even with vfat). 
  Migration fails with exception.InvalidSharedStorage during check_can_live_migrate_source method execution https://github.com/openstack/nova/blob/545d8d8666389f33601b0b003dec844004694919/nova/virt/libvirt/driver.py#L5388

  The root cause:
  https://github.com/openstack/nova/blob/545d8d8666389f33601b0b003dec844004694919/nova/virt/libvirt/driver.py#L5344 - flags is calculated incorrectly.

  
  Steps to reproduce
  ==================
  1. use vfat as config drive format, no shared storage like nfs;
  2. boot instance from volume;
  3. try to live-migrate instance;

  Expected result
  ===============
  instance migrated successfully

  Actual result
  =============
  live-migration is not even started:
  root@node-1:~# nova live-migration server00 node-4.test.domain.local
  ERROR (BadRequest): Migration pre-check error: Cannot block migrate instance f477e6da-4a04-492b-b7a6-e57b7823d301 with mapped volumes. Selective block device migration feature requires libvirt version 1.2.17 (HTTP 400) (Request-ID: req-4e0fce45-8b7c-43c0-90e7-cc929d2d60a1)

  Environment
  ===========

  multinode env, without file based shared storages like NFS.
  driver libvirt/kvm
  openstack branch stable/mitaka,
  should also be valid for master.

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