[Bug 1455482] Re: Multipath: upgrade multipath-tools to upstream

[Mauricio Faria de Oliveira]

@mathieu-tl

> unable to notice that QEMU harddrives should be multipathed. I'm

This brings 2 things to mind:
1) the property whitelist support (see one or two of those BTS bugs, for the uid / udev ID_SERIAL change -- one is for sg3-utils)
2) (don't think this is the case) if you're not using scsi disks (say, virtio disks), those are usually not multipath'able due to the lack of SCSI ID.

Hope this helps.

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Title:
  Multipath: upgrade multipath-tools to upstream

Status in multipath-tools package in Ubuntu:
  Triaged

Bug description:
  Ubuntu ships an older version of multipath-tools (i.e., the userspace multipath
  support; kernelspace multipath support is the device-mapper's multipath target, 
  which is as recent as their kernel is, so not a problem).

  Some test teams  already hit enough issues with fixes upstream
  to demonstrate that point.

  Going forward, it's very interesting to ship something more recent in Ubuntu, so
  to alleviate the number of bugs (likely with severity of block and ship) that we
  will have to debug/understand/interlock/backport/submit/upload to get fixed...

  The point is fixing multipath-tools once - in a big step - rather than
  N times.

  Canononical currently  pull multipath from Debian, which
  is multipath-tools 0.5.0, and upstream is around 144 patches/commits *ahead* of.
  This is more than enough fixes/reasons to move to it, rather than stay on 0.5.0.
  (upstream is basically the SLES level; as hare at suse.de drives upstream nowadays)

  This is why this is being opened as feature request.  I am wondering
  if Canonical see any objection to upgrading Ubuntu's multipath
  packages to a more recent version?

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