if [ -f "$DOCKER_OPTS_FILE" ]; then
	cat >> "${DOCKER_OPTS_FILE}" <<EOF
  $1
EOF
	fi
}

function disable_aufs() {
  # disable aufs module if aufs is loaded
  if lsmod | grep "aufs" &> /dev/null ; then
    sudo modprobe -r aufs
  fi
}

function set_docker_options_non_ubuntu() {
  # set docker options mtu and storage driver for non-ubuntu
  # as it is default for ubuntu