[Bug 1266809] Re: adt-virt-lxc fails on Trusty

[Martin Pitt]

I run adt-run as root with adt-virt-lxc, as in trusty, lxc-* now use
some kind of "user mode containers" where it looks for containers in
~/.local/share/lxc/ . So that doesn't work as intended any more anyway.

** Changed in: autopkgtest (Ubuntu)
   Importance: Undecided => Low

** Changed in: autopkgtest (Ubuntu)
       Status: New => Triaged

** Summary changed:

- adt-virt-lxc fails on Trusty
+ trusty: adt-virt-lxc cannot read /var/lib/lxc/ when running as user

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Title:
  trusty: adt-virt-lxc cannot read /var/lib/lxc/ when running as user

Status in “autopkgtest” package in Ubuntu:
  Triaged

Bug description:
  adt-virt-lxc assumes that the unprivileged user can see inside
  /var/lib/lxc in order to see when the guest container has finished
  booting, by detecting cloud-init's boot-finished flag.

  The newest lxc package locks down /var/lib/lxc by default, so this
  breaks.

  Hacked workaround: "sudo chmod 755 /var/lib/lxc". This reduces
  security of the system, but I think it should be OK on single-user
  systems, such as most environments where users are running adt-run.

  To fix this properly, adt-virt-lxc needs to call out to sudo to check
  for this flag, instead of calling os.path.exists, etc.

  An even nicer fix would be for lxc to have this functionality. I have
  filed bug 1266808 to track this.

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