[Bug 1043094] Re: Install mdadm into target if installing on a RAID

[ben-Nabiy Derush]

Still in 14.04 / LinuxMint 17

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Title:
  Install mdadm into target if installing on a RAID

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  As part of the ongoing discussion about dropping alternates [1] I
  wanted to find out whether it's currently possible at all to install
  on a RAID with Ubiquity. Turns out it is possible [2], but there are
  two post-installation steps which are not obvious and should be fixed.

  Creating partitions with gparted and building a RAID with mdadm on the
  live system works well. Ubiquity detects the devices and you can
  partition /dev/md0 and install on it just fine. The trouble starts
  because you need to install mdadm into the target system, for which I
  ran the following steps:

     * mount /dev/md0p1 /target, chroot /target
     * apt-get install mdadm; that fails because /etc/resolv.conf is empty (yay resolvconf), so exit chroot, apt-get download mdadm, copy to /target/tmp, chroot again, dpkg -i
     * that fails because it cannot access /dev etc, so back out of the chroot, bind-mount /dev/, back into the chroot, dpkg --configure -a, get scared by the warnings about not being able to load MD suppport (turns out they are harmless)

  It would be nice if Ubiquity could install mdadm into the target
  system together with its other setup if any of the target partitions
  is /dev/md*.

  [1] https://lists.ubuntu.com/archives/ubuntu-devel/2012-August/035675.html
  [2] https://lists.ubuntu.com/archives/ubuntu-devel/2012-August/035680.html

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 3.5.0-12.12-generic 3.5.2
  Uname: Linux 3.5.0-12-generic x86_64
  ApportVersion: 2.5.1-0ubuntu2
  Architecture: amd64
  Date: Wed Aug 29 07:13:52 2012
  EcryptfsInUse: Yes
  InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- debian-installer/language=de keyboard-configuration/layoutcode=us
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120627)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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