# It can take several minutes before ntpd selects a server to synchronize with;
# try checking after 17 minutes (1024 seconds).

      alarm: system_clock_sync_state
         on: system.clock_sync_state
      class: Errors
       type: System
  component: Clock
host labels: _os=linux
       calc: $state
      units: synchronization state
      every: 10s
       warn: $system.uptime.uptime > 17 * 60 AND $this == 0
      delay: down 5m
    summary: System clock sync state
       info: When set to 0, the system kernel believes the system clock is not properly synchronized to a reliable server
         to: silent