virtualization/verify_lxd need update to test on ubuntu core

[Betty Lin]

virtualization/verify_lxd need update to test on ubuntu core
Now it will be failed because it can't execute 'apt-cache'

Log:
https://certification.canonical.com/hardware/202012-28532/submission/205707/test/68747/result/17196123/

[Jeff Lane  (bladernr)]

DEBUG:root:Executing LXD Test
Traceback (most recent call last):
  File "/tmp/nest-0afhlxc2.460ec11461e5ca7de0e0e007ae263fcf4342ba90cf2e32ea21c373216a8e9690/virtualization.py", line 957, in <module>
    sys.exit(main())
  File "/tmp/nest-0afhlxc2.460ec11461e5ca7de0e0e007ae263fcf4342ba90cf2e32ea21c373216a8e9690/virtualization.py", line 950, in main
    args.func(args)
  File "/tmp/nest-0afhlxc2.460ec11461e5ca7de0e0e007ae263fcf4342ba90cf2e32ea21c373216a8e9690/virtualization.py", line 852, in test_lxd
    lxd_test = LXDTest(template, rootfs)
  File "/tmp/nest-0afhlxc2.460ec11461e5ca7de0e0e007ae263fcf4342ba90cf2e32ea21c373216a8e9690/virtualization.py", line 661, in __init__
    self.os_version = lsb_release.get_distro_information()["RELEASE"]
  File "/snap/checkbox-elgin/8/checkbox-runtime/usr/lib/python3/dist-packages/lsb_release.py", line 398, in get_distro_information
    distinfo = guess_debian_release()
  File "/snap/checkbox-elgin/8/checkbox-runtime/usr/lib/python3/dist-packages/lsb_release.py", line 332, in guess_debian_release
    rinfo = guess_release_from_apt()
  File "/snap/checkbox-elgin/8/checkbox-runtime/usr/lib/python3/dist-packages/lsb_release.py", line 237, in guess_release_from_apt
    releases = parse_apt_policy()
  File "/snap/checkbox-elgin/8/checkbox-runtime/usr/lib/python3/dist-packages/lsb_release.py", line 216, in parse_apt_policy
    policy = subprocess.Popen(['apt-cache','policy'],
  File "/snap/checkbox-elgin/8/checkbox-runtime/usr/lib/python3.8/subprocess.py", line 854, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/snap/checkbox-elgin/8/checkbox-runtime/usr/lib/python3.8/subprocess.py", line 1702, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'apt-cache'

That is a problem in the lsb_release module where it uses apt-cache to guess certain things.

You'll need to wrap this in a try/except block and find a different way to determine the OS release on Core...

651 class LXDTest(object):
652
653 def __init__(self, template=None, rootfs=None):
654 self.rootfs_url = rootfs
655 self.template_url = template
656 self.rootfs_tarball = None
657 self.template_tarball = None
658 self.name = 'testbed'
659 self.image_alias = uuid4().hex
660 self.default_remote = "ubuntu:"
661 self.os_version = lsb_release.get_distro_information()["RELEASE"]

You'd need to wrap line 661 in a try/except block and fall over to whatever mechanism exists in core to determine the release information typicall provided by lsb_release.

[Jeff Lane  (bladernr)]

Actually, a better solution, IMO would be to start building a library in checkbox-support that will handle this and can be imported whenever it's needed.

[Maksim Beliaev (beliaev-maksim)]

Bug was migrated to GitHub: https://github.com/canonical/checkbox/issues/179.
Bug is no more monitored here.