Day4 of #BashBlazeChallenge

🚀 Automated Process Monitoring Script! 🚀

Just created a Bash script that ensures a specific process is always up and running on Linux systems. 🔄 If the process unexpectedly stops, the script kicks in, automatically restarting it! 🛠️

Key Features:

• 🎯 Process Selection: Specify the target process using a command-line argument.

• 🕵️‍♂️ Process Existence Check: Efficiently checks if the process is currently running.

• 🔄 Restart Mechanism: Automatic restarts initiated when the process is not running.

• ⏰ Automation: Schedule the script using cron jobs for regular monitoring.

Code :

#!/bin/bash
<<COMMENT1
        The script ensures a specific process is always up and running on Linux systems
                - Process Selection using a command-line argument.
                - Process Existence Check if its runningor not.
                - Restart Mechanism :  Automatic restarts initiated when the process is not running.
                - Automation: Schedule the script using cron jobs for regular monitoring.
COMMENT1


# Function to check is the process is running or not
is_process_running() {

        if pgrep -x "$1" >/dev/null; then  # if statment evaluates the exit status of the command inside it
                return 0
        else
                return 1
        fi
}

# Function restart process
restart_process() {
        if sudo systemctl start nginx; then
                echo "Process $process_name restarted successfully."
                return 0
        else
                echo "Failed to start the process $process_name."
                return 1
        fi
}

if [ $# -eq 0 ]; then
        echo "Error : Process name not provided in the argument."
        exit 1
fi
process_name=$1
max_attempts=3
current_attempt=1

if is_process_running $process_name; then
        echo "Process $process_name is currently running."
else
        echo "Process $process_name is in STOP state."
        read -p "Do you want to Restart the process ? (y/n): " user_input

        if [ $user_input = "y" ]; then
                while [ $current_attempt -le $max_attempts ];do

                        echo "Process $process_name is not running. Attempting to restart..."
                        if restart_process $process_name; then
                                exit 0
                        fi

                        ((current_attempt++))
                        sleep 5
                done

                echo "Maximum restart attempts reached. Please check the process manually."
        else
                echo "Thank You."
        fi
fi

Output :