Linux Monitor - System Time Check Script

#!/bin/bash

# This resource is provided as a convenience for Level users. We cannot 
# guarantee it will work in all environments. Please test before deploying 
# to your production environment. We welcome contributions to our community 
# library

# Level Library
# https://level.io/library/script-linux-monitor-system-time-check

# Set the target time zone
TARGET_TIMEZONE="{{cf_timezone}}"

# Variables to hold checks
check_count=0
checks_failed=""

# Capture the output of timedatectl
output=$(timedatectl)

# Check and display the current time zone
timezone=$(echo "$output" | grep 'Time zone:' | awk '{print $3}')
echo "Current Time Zone: $timezone"

# Check if the time zone matches the target
if [[ $timezone != "$TARGET_TIMEZONE" ]]; then
  echo "ALERT: Time zone is not $TARGET_TIMEZONE. Attempting to set to $TARGET_TIMEZONE..."
  sudo timedatectl set-timezone "$TARGET_TIMEZONE"
  if [[ $? -eq 0 ]]; then
    echo "Time zone set to $TARGET_TIMEZONE successfully."
  else
    echo "Failed to set time zone to $TARGET_TIMEZONE."
    check_count=$((check_count + 1))
    checks_failed+=" Failed to set time zone to $TARGET_TIMEZONE."
  fi
fi

# Check if the system clock is synchronized
clock_sync=$(echo "$output" | grep 'System clock synchronized:' | awk '{print $4}')
if [[ $clock_sync != "yes" ]]; then
  echo "ALERT: System clock is not synchronized."
  check_count=$((check_count + 1))
  checks_failed+=" System clock is not synchronized."
fi

# Check if NTP service is active
# Debian
ntp_service_debian=$(echo "$output" | grep 'NTP service:' | awk '{print $3}')
# Ubuntu
ntp_service_ubuntu=$(echo "$output" | grep 'systemd-timesyncd.service active:' | awk '{print $3}')

if [[ $ntp_service_debian != "active" ]] && [[ $ntp_service_ubuntu != "yes" ]]; then
  echo "ALERT: NTP service is not active."
  check_count=$((check_count + 1))
  checks_failed+=" NTP service is not active."
fi

# Final check summary
if [ $check_count -gt 0 ]; then
  echo "ALERT: $check_count checks failed."
  echo "Checks Failed: $checks_failed"
  exit 1
else
  echo "SUCCESS: All checks passed."
  exit 0
fi