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[leon zhu <1906768@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

   My environment uses the OpenStack Pike，fibre Channel is used for back-end storage，when we place 'volume_use_multipath=True' in nova.conf, we found that evacuation leads to multipath residue。
  Trace code through Debug，we find os-brick can not find volume_paths, So the residual multipath cannot be removed。
   By analyzing the code，the Volume_path acquired through FC is not in a local directory, because it's on the new node.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1906768

Title:
  Evacuation results in multipath residue when use fc

Status in OpenStack Compute (nova):
  New

Bug description:
     My environment uses the OpenStack Pike，fibre Channel is used for back-end storage，when we place 'volume_use_multipath=True' in nova.conf, we found that evacuation leads to multipath residue。
    Trace code through Debug，we find os-brick can not find volume_paths, So the residual multipath cannot be removed。
     By analyzing the code，the Volume_path acquired through FC is not in a local directory, because it's on the new node.

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