[Bug 922646] Re: precise alternate LVM failed to install: no root file system

[Colin Watson]

OK.  There are multiple problems here.

 1) parted has stopped probing DM devices that aren't DM-RAID.  partman-base needs it to support this.
 2) partman parses the output of 'multipath -l' to decide whether a device is a multipath device.  Foolishly, multipath prints errors to standard output, such as a complaint about dm-multipath not being loaded.
 3) dmraid-udeb depends on multipath-udeb for kpartx.  There is no kpartx-udeb.

For 1), I'm going to restore this support; it's part of parted's
interface now and shouldn't be broken.

For 2), mostly we avoid this because we only ever install multipath-udeb
in code that modprobes dm-multipath, but dmraid-udeb just broke this
assumption.  Fixing this properly seems fiddly, not least because I
can't test that I haven't broken multipath in the process, so I'm
inclined to just restore this assumption by creating kpartx-udeb and
having dmraid-udeb depend on that.

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https://bugs.launchpad.net/bugs/922646

Title:
  precise alternate LVM failed to install: no root file system

Status in “dmraid” package in Ubuntu:
  Triaged
Status in “multipath-tools” package in Ubuntu:
  Triaged
Status in “parted” package in Ubuntu:
  Fix Released
Status in “dmraid” source package in Precise:
  Triaged
Status in “multipath-tools” source package in Precise:
  Triaged
Status in “parted” source package in Precise:
  Fix Released

Bug description:
  Precise Alternate i386/amd64 20120127.2 LVM

  TEST CASE 
  1. At the partitioning step select: use entire disk and setup LVM 
  2. Write to disk and accept the amount of VG to use (10G in this case)

  RESULT:
  Partitioning setup fails with:
  No root file system
  No root file system is defined

  Guided partitioning without LVM works fine.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: debian-installer (not installed)
  ProcVersionSignature: Ubuntu 3.2.0-10.18-generic 3.2.1
  Uname: Linux 3.2.0-10-generic x86_64
  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
  Date: Fri Jan 27 16:23:31 2012
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: Dell Inc. Inspiron N4010
  MemoryUsage:
   total       used       free     shared    buffers     cached
   Mem:       2943228    2725496     217732          0      37732     796032
   -/+ buffers/cache:    1891732    1051496
   Swap:      2928636     215948    2712688
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.utf8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-10-generic root=UUID=d8966312-304d-4504-b854-5ec365ce6e20 ro quiet splash vt.handoff=7
  SourcePackage: debian-installer
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/19/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 021CN3
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A11
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A11
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd01/19/2011:svnDellInc.:pnInspironN4010:pvrA11:rvnDellInc.:rn021CN3:rvrA11:cvnDellInc.:ct8:cvrA11:
  dmi.product.name: Inspiron N4010
  dmi.product.version: A11
  dmi.sys.vendor: Dell Inc.

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