def mount_overlay_fs(lowerdir, upperdir, workdir, mount_point):
    run_command_or_raise(['mkdir', '-p', mount_point])
    overlay_options = 'rw,relatime,lowerdir={},upperdir={},workdir={}'.format(lowerdir, upperdir, workdir)
    run_command_or_raise(['mount', 'overlay', '-t', 'overlay', '-o', overlay_options, mount_point])
def mount_overlay_fs(lowerdir, upperdir, workdir, mount_point):
    run_command_or_raise(['mkdir', '-p', mount_point])
    overlay_options = 'rw,relatime,lowerdir={},upperdir={},workdir={}'.format(lowerdir, upperdir, workdir)
    run_command_or_raise(['mount', 'overlay', '-t', 'overlay', '-o', overlay_options, mount_point])