dashboard

Dashboard Extension

A production-ready health and metrics dashboard extension for Forge v2 with real-time monitoring, data export, and a modern web UI.

Features

• Real-time Monitoring: WebSocket-based live updates of health checks and metrics
• Health Checks: Monitor all registered services with detailed status information
• Metrics Display: View system metrics with historical trends
• Beautiful UI: Modern, responsive interface built with Tailwind CSS
• Interactive Charts: Visualize data with ApexCharts
• Data Export: Export dashboard data in JSON, CSV, and Prometheus formats
• Dark Mode: Auto, light, and dark theme support
• Time-series Data: Configurable data retention and history
• Zero Build: No compilation needed - uses CDN for assets

Installation

The dashboard extension is included in Forge v2. Simply import it:

import "github.com/xraph/forge/extensions/dashboard"

Quick Start

package main

import (
    "context"
    "log"

    "github.com/xraph/forge"
    "github.com/xraph/forge/extensions/dashboard"
)

func main() {
    // Create Forge app
    app := forge.NewApp(forge.AppConfig{
        Name:        "my-app",
        Version:     "1.0.0",
        Environment: "production",
    })

    // Register dashboard extension
    app.RegisterExtension(dashboard.NewExtension(
        dashboard.WithPort(8080),
        dashboard.WithTitle("My App Dashboard"),
    ))

    // Start app
    ctx := context.Background()
    if err := app.Start(ctx); err != nil {
        log.Fatal(err)
    }

    // Dashboard available at http://localhost:8080/dashboard
    select {}
}

UI Features

Overview Tab

• Summary Cards: Overall health, service count, metrics count, and system uptime
• Interactive Charts: Historical health and service count trends
• Health Checks Table: Detailed table of all health checks with status indicators
• Services Grid: Clickable service cards for quick access to details
• Export Options: One-click export in multiple formats

Service Detail Modal

Click any service card to open a modal with:

• Service status and type
• Last health check information
• Service-specific metrics
• Health details and messages

Metrics Report Tab

• Statistics Overview: Total metrics, breakdown by type (counters, gauges, histograms, timers)
• Type Distribution Chart: Pie chart showing metric type distribution
• Active Collectors Table: All registered metrics collectors with status
• Top Metrics List: Current values of top 20 metrics

Theme Support

• Dark Mode: Full dark mode support for all UI elements
• Theme Toggle: Persistent theme preference via localStorage
• Auto Detection: Respects system preference if not explicitly set
• Smooth Transitions: Animated color transitions between themes

Configuration

Programmatic Configuration

app.RegisterExtension(dashboard.NewExtension(
    dashboard.WithPort(8080),                          // Server port
    dashboard.WithBasePath("/dashboard"),              // Base URL path
    dashboard.WithTitle("My Dashboard"),               // Dashboard title
    dashboard.WithTheme("auto"),                       // Theme: auto, light, dark
    dashboard.WithRealtime(true),                      // Enable WebSocket updates
    dashboard.WithRefreshInterval(30*time.Second),     // Data refresh interval
    dashboard.WithExport(true),                        // Enable data export
    dashboard.WithHistoryDuration(1*time.Hour),        // Data retention period
    dashboard.WithMaxDataPoints(1000),                 // Max historical points
))

YAML Configuration

Create a config.yaml:

extensions:
  dashboard:
    port: 8080
    base_path: "/dashboard"
    
    # Features
    enable_auth: false
    enable_realtime: true
    enable_export: true
    export_formats:
      - json
      - csv
      - prometheus
    
    # Data collection
    refresh_interval: 30s
    history_duration: 1h
    max_data_points: 1000
    
    # UI settings
    theme: "auto"  # auto, light, dark
    title: "My Application Dashboard"
    
    # Server settings
    read_timeout: 30s
    write_timeout: 30s
    shutdown_timeout: 10s

Load configuration:

app.RegisterExtension(dashboard.NewExtension(
    dashboard.WithRequireConfig(true),
))

API Endpoints

Overview Data

GET /dashboard/api/overview

Returns overview of system health, services, metrics, and uptime.

Response:

{
  "timestamp": "2025-10-22T10:30:00Z",
  "overall_health": "healthy",
  "total_services": 5,
  "healthy_services": 5,
  "total_metrics": 42,
  "uptime": 3600000000000,
  "version": "1.0.0",
  "environment": "production"
}

Health Checks

GET /dashboard/api/health

Returns detailed health check results for all services.

Metrics

GET /dashboard/api/metrics

Returns all current metrics.

Services

GET /dashboard/api/services

Returns list of registered services.

Historical Data

GET /dashboard/api/history

Returns time-series historical data.

Data Export

JSON Export

GET /dashboard/export/json

Exports complete dashboard snapshot as JSON.

CSV Export

GET /dashboard/export/csv

Exports dashboard data as CSV file.

Prometheus Metrics

GET /dashboard/export/prometheus

Exports metrics in Prometheus text format for scraping.

WebSocket API

Connect to real-time updates:

const ws = new WebSocket('ws://localhost:8080/dashboard/ws');

ws.onmessage = (event) => {
  const message = JSON.parse(event.data);
  
  switch (message.type) {
    case 'overview':
      console.log('Overview update:', message.data);
      break;
    case 'health':
      console.log('Health update:', message.data);
      break;
  }
};

// Send ping
ws.send(JSON.stringify({ type: 'ping' }));

Advanced Usage

Custom Dashboard Server

Access the dashboard server for advanced operations:

dashboard := dashboard.NewExtension()
app.RegisterExtension(dashboard)

// After app starts
server := dashboard.Server()

// Access collector
collector := server.GetCollector()
overview := collector.CollectOverview(ctx)

// Access history
history := server.GetHistory()
data := history.GetAll()

Integration with DI Container

The dashboard server is registered in the DI container:

// Resolve dashboard from container
dashboardServer, err := forge.Resolve[*dashboard.DashboardServer](app.Container(), "dashboard")
if err != nil {
    log.Fatal(err)
}

// Use dashboard server
collector := dashboardServer.GetCollector()

UI Features

Overview Cards

• Overall system health status
• Service counts (healthy/total)
• Total metrics tracked
• System uptime

Charts

• Service health history
• Service count trends
• Interactive with zoom/pan
• Auto-updating with WebSocket

Health Checks Table

• Real-time service status
• Health check messages
• Check duration
• Last checked timestamp

Services List

• All registered services
• Service types
• Current status

Export Buttons

• Quick access to JSON export
• CSV download
• Prometheus metrics

Theme Toggle

• Auto (system preference)
• Light mode
• Dark mode
• Persistent per session

Performance

• Efficient Data Collection: Configurable refresh intervals
• Memory-Efficient: Ring buffer for historical data
• Concurrent Operations: Thread-safe data access
• WebSocket Optimizations: Client-side reconnection, heartbeats
• Minimal Overhead: ~5MB memory, <1% CPU when idle

Production Considerations

Security

1. Enable Authentication: Use WithAuth(true) and implement auth middleware
2. HTTPS: Always use TLS in production
3. CORS: Configure proper CORS policies
4. Rate Limiting: Add rate limiting for API endpoints

Monitoring

The dashboard monitors itself:

• Health check for server status
• Metrics for request counts
• WebSocket connection counts
• Export operation tracking

Scalability

• WebSocket supports 100+ concurrent connections
• Historical data auto-trimmed based on retention policy
• Efficient memory usage with ring buffers
• Graceful degradation if WebSocket fails

Troubleshooting

Dashboard Won't Start

Check logs for:

• Port conflicts (default 8080)
• Permission issues
• Configuration errors

WebSocket Not Connecting

1. Check browser console for errors
2. Verify firewall allows WebSocket
3. Ensure enable_realtime: true in config
4. Check WebSocket URL (ws:// for HTTP, wss:// for HTTPS)

No Data Showing

1. Verify other extensions are registered before dashboard
2. Check that services implement health checks
3. Ensure metrics are being collected
4. Check API endpoint responses in browser network tab

High Memory Usage

1. Reduce max_data_points in config
2. Shorten history_duration
3. Decrease refresh_interval

Examples

See examples/basic/ for a complete working example.

Dependencies

• gorilla/websocket: WebSocket support
• Tailwind CSS: Styling (via CDN)
• ApexCharts: Data visualization (via CDN)

License

Part of the Forge framework. See main repository for license information.

Contributing

Contributions welcome! Please see the main Forge repository for contribution guidelines.

Support

• GitHub Issues: Report bugs and request features
• Documentation: Full Forge documentation
• Examples: See examples/ directory