[Bug 1060404] Re: update-grub runs and fails in containers

[Serge Hallyn]

I've pushed a patch to ubuntu:lxc which will cause devtmpfs to be
mounted in ubuntu containers.

There remains the problem that grub-install then queries the user about
installing grub on /dev/vda1 (or whatever is hosting the container fs).

** Changed in: upstart (Ubuntu)
       Status: New => Invalid

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Title:
  update-grub runs and fails in containers

Status in “grub2” package in Ubuntu:
  Confirmed
Status in “lxc” package in Ubuntu:
  Confirmed
Status in “upstart” package in Ubuntu:
  Invalid

Bug description:
  If grub is installed in a container (as happens, for instance, with
  the ubuntu-cloud template) then an update of grub or linux-image will
  cause update-grub to be run.  It tries, finds it can't access the root
  device, fails, and causes the update to fail.

  It would be better for update-grub to detect that it is in a container
  and simply exit 0, so that the apt-get can succeed.  I'm attaching a
  debdiff which does that.

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