Clock Sync Check

Slug

58B1N0BK72NF

Fetches

0

Size

1969 B · 72 lines

Expires

never

Last fetch

—

Created

2026-09-07 00:35:59.167

Description

NTP/timedatectl synchronization

#!/usr/bin/env bash
# Clock sync check
# Read-only: reports timedatectl / NTP sync state. Warns if the clock is not synced.
# Exit 0 if healthy, 1 if NTP is off or unsynced, 2 if no time tool is available.
# Hosted on Runny.sh. Review the script page before you run it.

set -u

status=0
note() { printf '%s\n' "$*"; }
bump() {
  case $1 in
    crit) status=2 ;;
    warn) [ "$status" -lt 1 ] && status=1 ;;
  esac
}

note "=== Clock synchronization ==="
note "Host:     $(hostname 2>/dev/null || printf unknown)"
note "Local:    $(date -u '+%Y-%m-%dT%H:%M:%SZ' 2>/dev/null || date)"
note ""

if command -v timedatectl >/dev/null 2>&1; then
  timedatectl status 2>/dev/null | while IFS= read -r row; do
    note "  ${row}"
  done
  note ""
  ntp=$(timedatectl show -p NTP --value 2>/dev/null || true)
  synced=$(timedatectl show -p NTPSynchronized --value 2>/dev/null || true)
  note "NTP:      ${ntp:-unknown}"
  note "Synced:   ${synced:-unknown}"
  if [ "${synced}" = "yes" ]; then
    note "          OK"
  elif [ "${ntp}" = "no" ]; then
    note "          WARNING: NTP is disabled"
    bump warn
  else
    note "          WARNING: system clock is not synchronized"
    bump warn
  fi
elif command -v chronyc >/dev/null 2>&1; then
  chronyc tracking 2>/dev/null | while IFS= read -r row; do
    note "  ${row}"
  done
  leap=$(chronyc tracking 2>/dev/null | awk -F ': *' '/Leap status/ {print $2}')
  if [ "${leap}" = "Normal" ]; then
    note "          OK"
  else
    note "          WARNING: chrony leap status is ${leap:-unknown}"
    bump warn
  fi
elif command -v ntpstat >/dev/null 2>&1; then
  if ntpstat >/dev/null 2>&1; then
    note "ntpstat:  synchronized"
    note "          OK"
  else
    note "ntpstat:  not synchronized"
    bump warn
  fi
else
  note "timedatectl/chronyc/ntpstat not found"
  bump crit
fi
note ""

case $status in
  0) note "Result: HEALTHY" ;;
  1) note "Result: WARNING" ;;
  *) note "Result: CRITICAL" ;;
esac
exit "$status"