chrony/systemd/chrony-wait.service

   1 [Unit]
   2 Description=Wait for chrony to synchronize system clock
   3 After=chronyd.service
   4 Requires=chronyd.service
   5 Before=time-sync.target
   6 Wants=time-sync.target
   7
   8 [Service]
   9 Type=oneshot
  10 # Wait up to ~10 minutes for chronyd to synchronize and the remaining
  11 # clock correction to be less than 0.1 seconds
  12 ExecStart=/usr/bin/chronyc waitsync 60 0.1
  13 RemainAfterExit=yes
  14
  15 [Install]
  16 WantedBy=multi-user.target