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[Rafi Khardalian <1172832@xxxxxxxxxxxxxxxxxx>]

Resolved and should be closed.

** Changed in: nova
       Status: In Progress => Invalid

** Changed in: nova
     Assignee: Dongdong Zhou (dzhou121) => (unassigned)

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https://bugs.launchpad.net/bugs/1172832

Title:
  resize instance with shared storage fails

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  I have two compute nodes (Grizzly) with shared storage (NOVA-INST-DIR/instances on NFS).
  nova users don't have ssh keys or shells
  and
  allow_resize_to_same_host = True

  live-migration works well, but resize not always.
  resize made ​​on one node works well (e.g. A->A, B->B), but not between two nodes (e.g. A->B, B->A).

  There are errors associated with ssh/scp:

  nova/virt/libvirt/driver.py", line 3444, in migrate_disk_and_power_off
    utils.execute('ssh', dest, 'mkdir', '-p', inst_base)

  nova/virt/libvirt/utils.py", line 420, in copy_image
    execute('scp', src, dest)

  With shared storage migrate_disk_and_power_off/copy_image functions should do local copy instead via ssh/scp
  Relying on a simple test:
    same_host = (dest == self.get_host_ip_addr())
  to choose the local operations vs. remote is not sufficient

  As far as I know, the live-migration performs useful test
  (_check_shared_storage_test_file(filename)) and resize should too.

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