def _systemctl(self):
"""
Setup ``systemd`` unit files in the image.
"""
if self.systemctl:
for action in ("enable", "disable", "mask"):
for unit in self.systemctl.get(action, []):
SystemdImage.machine_systemctl(self.image_path, action,
unit)
# Clear {image}/etc/machine-id,
# else subsequent containers get that machine ID.
machine_id = os.path.join(self.image_path, "etc", "machine-id")
if os.path.exists(machine_id):
os.remove(machine_id)
