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

Mathieu Trudel-Lapierre mathieu.tl at gmail.com
Wed Jul 1 02:56:27 UTC 2015


Still working on it. With sg3-utils adapted to also ship a sg3-udeb
package for use by the installer (which multipath-udeb can depend on so
it's available to the installer), things appear to work more or less
properly. To be able to ship this we still need the dm-service-time
module available in multipath-modules (see bug 1469240), but I can patch
this requirement to revert to round-robin path selector in the meantime.

That said, partman needs an update so that partman-multipath properly
gets picked up. This may be another symptom of the module not being
immediately available; next step is to test that.

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Title:
  Multipath: upgrade multipath-tools to upstream

Status in multipath-tools package in Ubuntu:
  In Progress

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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