hvac-kia-content/monitoring

HVAC Know It All - Monitoring System

This directory contains the monitoring and alerting system for the HVAC Know It All Content Aggregation System.

Components

1. Monitoring Script (setup_monitoring.py)

• Collects system metrics (CPU, memory, disk, network)
• Monitors application metrics (scraper status, data sizes, log files)
• Checks for alert conditions
• Generates health reports
• Cleans up old metric files

2. Dashboard Generator (dashboard_generator.py)

• Creates HTML dashboard with real-time system status
• Shows resource usage trends with charts
• Displays scraper performance metrics
• Lists recent alerts and system health
• Auto-refreshes every 5 minutes

3. Systemd Services

• hvac-monitoring.service: Runs monitoring and dashboard generation
• hvac-monitoring.timer: Executes monitoring every 15 minutes

Installation

1. Install dependencies:

   sudo apt update
   sudo apt install python3-psutil
   

2. Install systemd services:

   sudo cp systemd/hvac-monitoring.* /etc/systemd/system/
   sudo systemctl daemon-reload
   sudo systemctl enable hvac-monitoring.timer
   sudo systemctl start hvac-monitoring.timer
   

3. Verify monitoring is running:

   sudo systemctl status hvac-monitoring.timer
   sudo journalctl -u hvac-monitoring -f
   

Directory Structure

monitoring/
├── setup_monitoring.py      # Main monitoring script
├── dashboard_generator.py    # HTML dashboard generator
├── README.md                # This file
├── metrics/                 # JSON metric files (auto-created)
│   ├── system_YYYYMMDD_HHMMSS.json
│   ├── application_YYYYMMDD_HHMMSS.json
│   └── health_report_YYYYMMDD_HHMMSS.json
├── alerts/                  # Alert files (auto-created)
│   └── alerts_YYYYMMDD_HHMMSS.json
└── dashboard/               # HTML dashboard files (auto-created)
    ├── index.html           # Current dashboard
    └── dashboard_YYYYMMDD_HHMMSS.html  # Timestamped backups

Monitoring Metrics

System Metrics

• CPU Usage: Percentage utilization
• Memory Usage: Percentage of RAM used
• Disk Usage: Percentage of disk space used
• Network I/O: Bytes sent/received, packets
• System Uptime: Hours since last boot
• Load Average: System load (Linux only)

Application Metrics

• Scraper Status: Last update time, item counts, state
• Data Directory Sizes: Markdown, media, archives
• Log File Status: Size, last modified time
• State File Analysis: Last IDs, update timestamps

Alert Conditions

Critical Alerts

• CPU usage > 80%
• Memory usage > 85%
• Disk usage > 90%

Warning Alerts

• Scraper hasn't updated in > 24 hours
• Log files > 100MB
• Application errors detected

Error Alerts

• Monitoring system failures
• File access errors
• Configuration issues

Dashboard Features

Health Overview

• Overall system status (HEALTHY/WARNING/CRITICAL)
• Resource usage gauges
• Alert summary counts

Trend Charts

• CPU, memory, disk usage over time
• Scraper item collection trends
• Historical performance data

Real-time Status

• Current scraper status table
• Recent alert history
• Last update timestamps

Auto-refresh

• Dashboard updates every 5 minutes
• Manual refresh available
• Responsive design for mobile/desktop

Usage

Manual Monitoring

# Run monitoring check
python3 /opt/hvac-kia-content/monitoring/setup_monitoring.py

# Generate dashboard
python3 /opt/hvac-kia-content/monitoring/dashboard_generator.py

# View dashboard
firefox file:///opt/hvac-kia-content/monitoring/dashboard/index.html

Check Recent Metrics

# View latest health report
ls -la /opt/hvac-kia-content/monitoring/metrics/health_report_*.json | tail -1

# View recent alerts
ls -la /opt/hvac-kia-content/monitoring/alerts/alerts_*.json | tail -5

Monitor Logs

# Follow monitoring logs
sudo journalctl -u hvac-monitoring -f

# View timer status
sudo systemctl list-timers hvac-monitoring.timer

Troubleshooting

Common Issues

1. Permission Errors

   sudo chown -R hvac:hvac /opt/hvac-kia-content/monitoring/
   sudo chmod +x /opt/hvac-kia-content/monitoring/*.py
   

2. Missing Dependencies

   sudo apt install python3-psutil python3-json
   

3. Service Not Running

   sudo systemctl status hvac-monitoring.timer
   sudo systemctl restart hvac-monitoring.timer
   

4. Dashboard Not Updating

   # Check if files are being generated
   ls -la /opt/hvac-kia-content/monitoring/metrics/
   
   # Manually run dashboard generator
   python3 /opt/hvac-kia-content/monitoring/dashboard_generator.py
   

Log Analysis

# Check for errors in monitoring
sudo journalctl -u hvac-monitoring --since "1 hour ago"

# Monitor system resources
htop

# Check disk space
df -h /opt/hvac-kia-content/

Integration

Web Server Setup (Optional)

To serve the dashboard via HTTP:

# Install nginx
sudo apt install nginx

# Create site config
sudo tee /etc/nginx/sites-available/hvac-monitoring << EOF
server {
    listen 8080;
    root /opt/hvac-kia-content/monitoring/dashboard;
    index index.html;
    
    location / {
        try_files \$uri \$uri/ =404;
    }
}
EOF

# Enable site
sudo ln -s /etc/nginx/sites-available/hvac-monitoring /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl reload nginx

Access dashboard at: http://your-server:8080

Email Alerts (Optional)

To enable email alerts for critical issues:

# Install mail utilities
sudo apt install mailutils

# Configure in monitoring script
export ALERT_EMAIL="admin@yourdomain.com"
export SMTP_SERVER="smtp.yourdomain.com"

Customization

Adding New Metrics

Edit setup_monitoring.py and add to collect_application_metrics():

def collect_application_metrics(self):
    # ... existing code ...
    
    # Add custom metric
    metrics['custom'] = {
        'your_metric': calculate_your_metric(),
        'another_metric': get_another_value()
    }

Modifying Alert Thresholds

Edit alert conditions in check_alerts():

# Change CPU threshold
if sys.get('cpu_percent', 0) > 90:  # Changed from 80% to 90%

# Add new alert
if custom_condition():
    alerts.append({
        'type': 'WARNING',
        'component': 'custom',
        'message': 'Custom alert condition met'
    })

Dashboard Styling

Modify the CSS in generate_html_dashboard() to customize appearance.

Security Considerations

• Monitoring runs with limited user privileges
• No network services exposed by default
• File permissions restrict access to monitoring data
• Systemd security features enabled (PrivateTmp, ProtectSystem, etc.)
• Dashboard contains no sensitive information

Performance Impact

• Monitoring runs every 15 minutes (configurable)
• Low CPU/memory overhead (< 1% during execution)
• Automatic cleanup of old metric files (7-day retention)
• Dashboard generation is lightweight (< 1MB files)