[Bug 2103735] [NEW] Avoid tmpfs /tmp during ubuntu-image builds

[Dave Jones]

Public bug reported:

At present, the Ubuntu Desktop for Raspberry Pi images are failing to
build [1] [2] with an apparent out of space issue. Although this appears
to occur *after* the rootfs has been allocated, it appears the file-
system image is sparse and thus doesn't take much space until it is
actually populated.

ubuntu-image (which is the tool used to build these images) defaults to
using /tmp as its working directory. This is now a tmpfs mount on
plucky, and thus of extremely limited space (at least compared to the
persistent storage). We should specify --workdir to avoid /tmp.

[1]: https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/plucky/ubuntu-
preinstalled

[2]:
https://launchpadlibrarian.net/782891260/buildlog_ubuntu_plucky_arm64_raspi_ubuntu-
preinstalled_BUILDING.txt.gz

** Affects: livecd-rootfs (Ubuntu)
     Importance: Critical
     Assignee: Dave Jones (waveform)
         Status: Triaged

** Changed in: livecd-rootfs (Ubuntu)
     Assignee: (unassigned) => Dave Jones (waveform)

** Changed in: livecd-rootfs (Ubuntu)
       Status: New => Triaged

** Changed in: livecd-rootfs (Ubuntu)
   Importance: Undecided => Critical

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to livecd-rootfs in Ubuntu.
https://bugs.launchpad.net/bugs/2103735

Title:
  Avoid tmpfs /tmp during ubuntu-image builds

Status in livecd-rootfs package in Ubuntu:
  Triaged

Bug description:
  At present, the Ubuntu Desktop for Raspberry Pi images are failing to
  build [1] [2] with an apparent out of space issue. Although this
  appears to occur *after* the rootfs has been allocated, it appears the
  file-system image is sparse and thus doesn't take much space until it
  is actually populated.

  ubuntu-image (which is the tool used to build these images) defaults
  to using /tmp as its working directory. This is now a tmpfs mount on
  plucky, and thus of extremely limited space (at least compared to the
  persistent storage). We should specify --workdir to avoid /tmp.

  [1]: https://launchpad.net/~ubuntu-
  cdimage/+livefs/ubuntu/plucky/ubuntu-preinstalled

  [2]:
  https://launchpadlibrarian.net/782891260/buildlog_ubuntu_plucky_arm64_raspi_ubuntu-
  preinstalled_BUILDING.txt.gz

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/livecd-rootfs/+bug/2103735/+subscriptions