check_services.sh

#!/bin/bash
#author: salman sk

services=("nginx" "mysql" "ssh" "apache2" "cron" "networking" "php7.4-fpm" "postfix" "vsftpd" "ufw" "fail2ban")
log_file="logs/services.log"
config_file="config.conf"

# Check if script is run as root
if [ "$EUID" -ne 0 ]; then
  echo "Please run as root"
  exit 1
fi

log_dir=$(dirname "$log_file")
mkdir -p "$log_dir"

if [ ! -f "$config_file" ]; then
  echo "Config file not found. Exiting."
  exit 1
fi

source "$config_file"

check_and_fix_service() {
  local service=$1
  local fix_script="./${service}_fix.sh"#create the scripts for fix(you have to create your own)

  if ! systemctl list-units --full -all | grep -Fq "$service.service"; then
    echo "$(date) - $service does not exist on this system." >> "$log_file"
    return
  fi

  if systemctl is-active --quiet "$service"; then
    echo "$(date) - $service is running" >> "$log_file"
  else
    echo "$(date) - $service is not running. Attempting to restart." >> "$log_file"
    
    if systemctl restart "$service"; then
      echo "$(date) - $service restarted successfully" >> "$log_file"
    else
      echo "$(date) - Failed to restart $service. Trying stop/start." >> "$log_file"
      
      if systemctl stop "$service" && systemctl start "$service"; then
        echo "$(date) - $service restarted successfully after stop/start" >> "$log_file"
      else
        echo "$(date) - Failed to stop/start $service. Trying reload." >> "$log_file"

        if systemctl reload "$service"; then
          echo "$(date) - $service reloaded successfully" >> "$log_file"
        else
          echo "$(date) - Failed to reload $service. Trying update and restart." >> "$log_file"

          if apt-get update && apt-get install --only-upgrade -y "$service" && systemctl restart "$service"; then
            echo "$(date) - $service updated and restarted successfully" >> "$log_file"
          else
            echo "$(date) - Failed to update and restart $service. Manual intervention required." >> "$log_file"
            
            if [ -f "$fix_script" ]; then
              echo "$(date) - Running fix script for $service" >> "$log_file"
              ./"$fix_script" >> "$log_file" 2>&1
              echo "$(date) - Fix script executed for $service" >> "$log_file"
            else
              echo "$(date) - No fix script found for $service. Manual intervention required." >> "$log_file"
            fi
          fi
        fi
      fi
    fi
  fi
}

for service in "${services[@]}"; do
  check_and_fix_service "$service"
done