System Monitor

A Node.js application for monitoring system resources including CPU, memory, network, and process information with logging capabilities.

Demo

Features

• Real-time System Monitoring: Continuously monitors system resources at configurable intervals
• Comprehensive Metrics Collection: Tracks CPU usage, memory consumption, network interfaces, and process information
• Advanced Logging: Built-in logging system with file persistence and console output
• Alert System: Automatic warning and error notifications for high resource usage
• Detailed Reporting: Generates summary reports of system performance and monitoring statistics
• Graceful Shutdown: Proper cleanup and report generation on application termination

Installation

1. Clone the repository:

git clone <repository-url>
cd custom-logger.js

2. Install dependencies:

npm install

3. Run the application:

node custom-logger.js

Usage

The system monitor starts automatically when the script is executed. It will:

• Create a logs directory for storing monitoring data
• Begin monitoring system resources every 3 seconds
• Display real-time metrics in the console
• Log all events to ./logs/system-monitor.log
• Generate a summary report on shutdown (saved as monitor-report.txt)

To stop monitoring:

Press Ctrl+C to gracefully shutdown the application.

Monitored Metrics

• Memory Usage: Total, used, and free memory with percentage utilization
• CPU Information: Number of cores, model, load average, and usage percentage
• Process Metrics: Current process memory usage and uptime
• System Information: Platform, architecture, hostname, and user information
• Network Interfaces: Count and details of available network interfaces

Alert Thresholds

The system automatically generates alerts based on resource usage:

• Memory Usage:

  • Warning: Above 70%
  • Critical: Above 85%

• CPU Usage:

  • Warning: Above 60%
  • Critical: Above 80%

Log Format

Logs are stored in ./logs/system-monitor.log with the following format:

2024-01-01T12:00:00.000Z [LEVEL] Message content

Where LEVEL can be:

• INFO: General information and metrics
• WARN: Warning alerts
• ERROR: Critical alerts

Configuration

The monitoring interval can be adjusted by modifying the parameter in:

monitor.startMonitoring(3000); // 3000ms = 3 seconds

Requirements

• Node.js
• File system write permissions for log directory creation