RHEV: Migration of an SAP guest that uses the vhostmd hook failed.

Solution In Progress - Updated -

Issue

  • VM live migration failed.

  • Guests running SAP failed to migrate to another host.

  • The vdsm logs on the source host contain;

Thread-3287::DEBUG::2014-04-08 17:05:44,771::vm::1464::vm.Vm::(blockDev) vmId=`48efae5b-a1ac-4c0e-997f-eb00b533b179`::Unable to determine if the path '/dev/shm/vhostmd0' is a block device
Traceback (most recent call last):
  File "/usr/share/vdsm/vm.py", line 1461, in blockDev
    self._blockDev = utils.isBlockDevice(self.path)
  File "/usr/lib64/python2.6/site-packages/vdsm/utils.py", line 101, in isBlockDevice
    return stat.S_ISBLK(os.stat(path).st_mode)
OSError: [Errno 2] No such file or directory: '/dev/shm/vhostmd0'

Environment

  • Red Hat Enterprise Virtualization (RHEV) 3.2
  • Red Hat Enterprise Linux (RHEL) 6.5;
    • vdsm-4.13.2-0.11
    • vdsm-hook-vhostmd-4.13.2-0.11
    • vhostmd-0.4-2.7
  • SAP guests using vhostmd hook

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