Bug#951347: cloud.debian.org: Cannot start vagrant LXC box 'debian/buster64

[Reto Kaiser <reto@retoonline.com>]

Package: cloud.debian.org
Severity: normal

Dear Maintainer,

I cannot start a vagrant LXC-box for 'debian/buster64', but succeed to
start the 'debian/stretch64' box. The error message leads me to believe
there is something wrong in the LXC config of the buster box.

Vagrant box: debian/buster64 (version 10.1.0)

I'm trying to start a vagrant LXC-box with this config:
-----
Vagrant.configure("2") do |config|
  config.vm.box = "debian/buster64"
end
-----

Trying to start the vagrant box fails like this:
-----
$ VAGRANT_LOG=DEBUG vagrant up --provider=lxc
[...]
There was an error executing ["sudo", "/usr/bin/env", "lxc-start", "-d", "--name", "test-buster_default_1581713879231_84397"]
[...]
-----

Manually trying to start the LXC container fails like this:
-----
$ sudo lxc-start -F --name test-buster_default_1581713879231_84397
lxc-start: test-buster_default_1581713879231_84397: storage/dir.c: dir_mount: 198 No such file or directory - Failed to mount "/var/lib/lxc/buster-base/rootfs" on "/usr/lib/lxc/rootfs"
  lxc-start: test-buster_default_1581713879231_84397: conf.c: lxc_mount_rootfs: 1351 Failed to mount rootfs "/var/lib/lxc/buster-base/rootfs" onto "/usr/lib/lxc/rootfs" with options "(null)"
      lxc-start: test-buster_default_1581713879231_84397: conf.c: lxc_setup_rootfs_prepare_root: 3447 Failed to setup rootfs for
    lxc-start: test-buster_default_1581713879231_84397: conf.c: lxc_setup: 3550 Failed to setup rootfs
[...]
-----

I don't have a folder "/var/lib/lxc/buster-base" that is mentioned in
the error message.
The corresponding LXC config option is not present for the stretch box,
but only for the buster box:
-----
$ diff ~/.vagrant.d/boxes/debian-VAGRANTSLASH-stretch64/9.1.0/lxc/lxc-config ~/.vagrant.d/boxes/debian-VAGRANTSLASH-buster64/10.1.0/lxc/lxc-config  
[...]
9a10,13
> lxc.net.0.type = empty
> lxc.apparmor.profile = generated
> lxc.apparmor.allow_nesting = 1
> lxc.rootfs.path = dir:/var/lib/lxc/buster-base/rootfs
16c20
< lxc.uts.name = stretch-base
---
> lxc.uts.name = buster-base
[...]
-----


Is this 'lxc.rootfs.path' pointing to '/var/lib/lxc/buster-base' expected to be in the config?

Kind regards
Reto 



-- System Information:
Debian Release: 10.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.5.3-arch1-1 (SMP w/12 CPU cores; PREEMPT)
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: unable to detect