[Bug 1512589] Re: partman-efi should follow partman-auto/disk to reuse the ESP.

[Mathieu Trudel-Lapierre]

This will also require an SRU / upload of ubiquity to apply for the
graphical installer. We'll do the update when the package is available
in the archive (I have some other changes in progress for ubiquity,
too!)

Thanks!

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https://bugs.launchpad.net/bugs/1512589

Title:
  partman-efi should follow partman-auto/disk to reuse the ESP.

Status in OEM Priority Project:
  New
Status in OEM Priority Project trusty series:
  New
Status in debian-installer package in Ubuntu:
  Invalid
Status in partman-efi package in Ubuntu:
  In Progress
Status in debian-installer source package in Trusty:
  Invalid
Status in partman-efi source package in Trusty:
  Triaged
Status in debian-installer source package in Wily:
  Invalid
Status in partman-efi source package in Wily:
  Triaged
Status in partman-efi package in Debian:
  New

Bug description:
  [Impact]

   * It may cause the installation failed when the users use
  https://wiki.debian.org/DebianInstaller/Preseed under some conditions.

  [Test Case]

   * Prepare a computer with UEFI secure boot enabled that has two system storage drives, such as /dev/nvme0n1 and /dev/sda.
   * Install the general Ubuntu system on /dev/nvme0n1 first.
   * Use debian-installer netboot images with the following d-i preseeds to install another Ubuntu on /dev/sda.
   * During the installation on /dev/sda, it will use /dev/nvme0n1p1 instead of /dev/sda1 as the EFI System Partition.

  [Regression Potential]

   * None

  [Other Info]

   * This issue is found in Ubuntu OEM projects that used dell-recovery
  /ubuntu-recovery on the platforms that have more than one system
  storage drive.

  ----
     Current implementation in partman-efi/fstab.d/efi is to find the
     first EFI System Partition (abbr. ESP) to use when we provided
     some kind of partman-auto/expert_recipe.

     However if the system has more than two ESPs, partman-efi will still
     use the first ESP it found even when we specify what we want in
     partman-auto/disk.

     For example, when the system has /dev/nvme0n1 and /dev/sda and we
     specified partman-auto/disk and partman-auto/expert_recipe as the following.

         d-i partman-auto/disk string /dev/sda
         d-i partman-auto/expert_recipe string \
                                               \
           ubuntu ::                           \
               100 150 200 free                \
               $iflabel{ gpt }                 \
               $reusemethod{ }                 \
               method{ efi }                   \
               format{ } .                     \
                                               \
               500 10000 4000000 ext4          \
               $primary{ }                     \
               method{ format }                \
               format{ }                       \
               use_filesystem{ }               \
               filesystem{ ext4 }              \
               mountpoint{ / } .               \
                                               \
               105% 150% 200% linux-swap       \
               method{ swap }                  \
               format{ }                       \
               .

     If there is already another Linux system installed in /dev/nvme0n1,
     partman-efi will reuse /dev/nvme0n1p1 and mount it at
     /target/boot/efi instead of reusing /dev/sda1 that we specify in
     partman-auto/disk.

     This should not be the behavior that we expected it will be.

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