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    Catch BlockDeviceError when starting instance · ec596c24
    Iustin Pop authored
    This is a forward-port of commit 1149 on the 1.2 branch:
      _GatherAndLinkBlockDevs used to raise the errors.BlockDeviceError
      exception when it failed to create a block device, and with this patch
      set it does so also when it fails to create a symlink to it.
      With this patch we move the call to this function into a pre-existing
      try-except block in the code, and catch the BlockDeviceError exception,
      logging a message and returning a failure state if it happens.
      Reviewed-by: iustinp
    The changes are related to the new hypervisor and logging syntax.
    Original-Author: ultrotter