def setup_root_mount(self):
# SLAVE means that mount events will get inside the container, but
# mounting something inside will not leak out.
# Use PRIVATE to not let outside events propagate in
mount(Path("none"), Path("/"), None, MS_REC | MS_SLAVE, None)
if not is_mount_point(self.root_dir):
mount(self.root_dir, self.root_dir, None, MS_BIND, None)
old_root_dir = self.root_dir.joinpath('old_root')
old_root_dir.mkdir(parents=True, exist_ok=True)
os.chdir(str(self.root_dir))
pivot_root(Path('.'), Path('old_root'))
os.chroot('.')
def test_container_rootfs_is_mountpoint(rootfs_for_testing):
assert is_mount_point(rootfs_for_testing)
with ContainerContext(rootfs_for_testing):
pass
def test_container_rootfs_is_not_mountpoint(debootstrapped_dir):
assert not is_mount_point(debootstrapped_dir)
with ContainerContext(debootstrapped_dir):
pass