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[Solly Ross <sross@xxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1303203

Title:
  VM resize: ssh/scp is tried even VM has no local disk

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  When a VM has no local disk, resize operation doesn't need to copy disk files over. It doesn't even need to check if the source/dest hypervisors are on a shared file system. Currently, both are attempted anyway:
  https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L4894

  This relies on the compute hosts being able to freely ssh/scp to each
  other, which requires setting up ssh keys. Further more, when kerberos
  is used for ssh authentication, ssh using IPs (the current
  implementation) simply won't work - full hostname is required.

  In the scenario where VM has no local disk, we should simply skip all
  the ssh/scp work..

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