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[Bug 1223975] Re: multipath tool sends IOs periodically after volume detached

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>
Date: Wed, 04 Dec 2013 10:33:21 -0000
Reply-to: Bug 1223975 <1223975@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: nova
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1223975

Title:
  multipath tool sends IOs periodically after volume detached

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  When detaching a volume, Nova doesn't disconnect the iSCSI portal and
  just return for there are other volumes attaching to the host. But the
  mutipath mapping device descriptor is there and multipath tool sends
  IOs periodically to storage array. This leads to some cinder storage
  drivers, such as huawei, can not unmap that volume for it detect
  periodic IOs.

  So we need to remove the multipath device descriptor in this case.

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