[Bug 1615574] [NEW] yakkety upgrade - 256MB boot partition too small to upgrade when using EFI

[Gordon Ball]

Public bug reported:

This is related to #1465050.

ubuntu-release-upgrader-core: 1:16.04.16

What I expected to happen: Attempting xenial -> yakkety upgrade, using a
previously installed system with the default partitioning scheme, would
succeed.

What happened:

With a 256MB /boot [1] partition on a system using EFI (having the
normal two kernels [2] with initrd, vmlinuz and vmlinuz.efi.signed),
`do-release-upgrade -d` exits warning insufficient space in /boot [3].

Manually working around this is fine, but I suspect this isn't that
uncommon a configuration and release-upgrader might need logic to remove
the backup kernel to free sufficient space?

[1]:

/dev/sda2                           237M  121M  104M  54% /boot
/dev/sda1                           511M  3.6M  508M   1% /boot/efi

(this was the install default for xenial beta-1, I think)

[2]:

1.2M abi-4.4.0-31-generic         180K memtest86+.bin
1.2M abi-4.4.0-34-generic         182K memtest86+.elf
187K config-4.4.0-31-generic      182K memtest86+_multiboot.bin
187K config-4.4.0-34-generic      3.8M System.map-4.4.0-31-generic
4.0K efi/                         3.8M System.map-4.4.0-34-generic
1.0K grub/                        6.8M vmlinuz-4.4.0-31-generic
 37M initrd.img-4.4.0-31-generic  6.8M vmlinuz-4.4.0-31-generic.efi.signed
 37M initrd.img-4.4.0-34-generic  6.8M vmlinuz-4.4.0-34-generic
 12K lost+found/                  6.8M vmlinuz-4.4.0-34-generic.efi.signed 

[3]:

The upgrade has aborted. The upgrade needs a total of 118 M free 
space on disk '/boot'. Please free at least an additional 9,134 k of 
disk space on '/boot'. Empty your trash and remove temporary packages 
of former installations using 'sudo apt-get clean'.

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1615574

Title:
  yakkety upgrade - 256MB boot partition too small to upgrade when using
  EFI

Status in ubiquity package in Ubuntu:
  New
Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  This is related to #1465050.

  ubuntu-release-upgrader-core: 1:16.04.16

  What I expected to happen: Attempting xenial -> yakkety upgrade, using
  a previously installed system with the default partitioning scheme,
  would succeed.

  What happened:

  With a 256MB /boot [1] partition on a system using EFI (having the
  normal two kernels [2] with initrd, vmlinuz and vmlinuz.efi.signed),
  `do-release-upgrade -d` exits warning insufficient space in /boot [3].

  Manually working around this is fine, but I suspect this isn't that
  uncommon a configuration and release-upgrader might need logic to
  remove the backup kernel to free sufficient space?

  [1]:

  /dev/sda2                           237M  121M  104M  54% /boot
  /dev/sda1                           511M  3.6M  508M   1% /boot/efi

  (this was the install default for xenial beta-1, I think)

  [2]:

  1.2M abi-4.4.0-31-generic         180K memtest86+.bin
  1.2M abi-4.4.0-34-generic         182K memtest86+.elf
  187K config-4.4.0-31-generic      182K memtest86+_multiboot.bin
  187K config-4.4.0-34-generic      3.8M System.map-4.4.0-31-generic
  4.0K efi/                         3.8M System.map-4.4.0-34-generic
  1.0K grub/                        6.8M vmlinuz-4.4.0-31-generic
   37M initrd.img-4.4.0-31-generic  6.8M vmlinuz-4.4.0-31-generic.efi.signed
   37M initrd.img-4.4.0-34-generic  6.8M vmlinuz-4.4.0-34-generic
   12K lost+found/                  6.8M vmlinuz-4.4.0-34-generic.efi.signed 

  [3]:

  The upgrade has aborted. The upgrade needs a total of 118 M free 
  space on disk '/boot'. Please free at least an additional 9,134 k of 
  disk space on '/boot'. Empty your trash and remove temporary packages 
  of former installations using 'sudo apt-get clean'.

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