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https://github.com/imertz/greek-sites-monitor
A Node.js application for monitoring the availability and response times of important Greek government, educational, and public service websites. The monitor runs automatic checks every minute and stores results in a SQLite database.
https://github.com/imertz/greek-sites-monitor
Last synced: 3 days ago
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A Node.js application for monitoring the availability and response times of important Greek government, educational, and public service websites. The monitor runs automatic checks every minute and stores results in a SQLite database.
- Host: GitHub
- URL: https://github.com/imertz/greek-sites-monitor
- Owner: imertz
- License: mit
- Created: 2024-12-20T22:33:49.000Z (8 days ago)
- Default Branch: main
- Last Pushed: 2024-12-20T22:58:41.000Z (8 days ago)
- Last Synced: 2024-12-20T23:27:57.279Z (8 days ago)
- Language: JavaScript
- Homepage: https://stati.mysolon.gr
- Size: 0 Bytes
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
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# Greek Sites Monitor
A Node.js application for monitoring the availability and response times of important Greek government, educational, and public service websites. The monitor runs automatic checks every minute and stores results in a SQLite database.
## Features
- Automated monitoring every minute
- Monitors 50+ important Greek websites including:
- Government portals (gov.gr, gsis.gr)
- Educational institutions
- Public utilities
- Emergency services
- Banking services
- News media
- Transportation services
- Provides detailed status tracking:
- Response time measurement
- Status code monitoring
- Error logging
- Historical data storage
- Real-time status updates
- Performance optimized:
- Batch processing of requests
- SQLite database with WAL mode
- Prepared statements
- Transaction support
- Graceful shutdown handling
## Prerequisites
- Node.js (v14 or higher)
- npm
## Installation
1. Clone the repository:
```bash
git clone https://github.com/yourusername/greek-sites-monitor.git
cd greek-sites-monitor
```
2. Install dependencies:
```bash
npm install
```
## Usage
### Development Mode
Run the monitor directly with Node.js:
```bash
npm start
```
### Production Mode
For production environments, it's recommended to use PM2:
1. Install PM2 globally:
```bash
npm install -g pm2
```
2. Start the monitor:
```bash
npm run start:pm2
```
3. Other PM2 commands:
```bash
# Stop the monitor
npm run stop:pm2
# View logs
npm run logs
```
The application will:
1. Start monitoring all configured websites
2. Run checks every minute in batches
3. Store results in an SQLite database
4. Display a summary table after each monitoring cycle
5. Handle graceful shutdown on SIGINT and SIGTERM signals
## Database
The application uses SQLite to store monitoring results with the following schema:
```sql
CREATE TABLE site_status (
id INTEGER PRIMARY KEY AUTOINCREMENT,
site_name TEXT,
url TEXT,
status_code INTEGER,
response_time REAL,
is_up INTEGER,
error_message TEXT,
timestamp DATETIME
)
```
## Configuration
### Monitor Settings
Key configurations in `monitor.js`:
- `timeout`: Default 10 seconds
- `batchSize`: Number of concurrent checks (default 5)
- `intervalMinutes`: Monitoring interval (default 1 minute)
### PM2 Configuration
The application includes a `ecosystem.config.js` file for PM2 with:
- Automatic restart on crashes
- Memory limit of 1GB
- Log rotation
- Environment variables
## Error Handling
The monitor handles various network errors including:
- DNS lookup failures
- Connection timeouts
- SSL certificate issues
- Too many redirects
- Connection refused errors
## Graceful Shutdown
The application implements graceful shutdown handling:
- Properly closes database connections
- Handles SIGINT and SIGTERM signals
- Ensures data integrity on exit
## License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
## Author
Ioannis Mertzanis
## Contributing
Contributions are welcome! Please feel free to submit a Pull Request.
## Support
If you find any bugs or have feature requests, please create an issue on GitHub.