add telemetry (#6926)

* add telemetry

* fix go mod

* add default telemetry server url

* Update README.md

* replace with broker count instead of s3 count

* Update telemetry.pb.go

* github action to deploy

.github/workflows/deploy_telemetry.yml

@@ -0,0 +1,157 @@
+# This workflow will build and deploy the SeaweedFS telemetry server
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Deploy Telemetry Server
+
+on:
+  push:
+    branches: [ "master" ]
+    paths:
+      - 'telemetry/**'
+  workflow_dispatch:
+    inputs:
+      setup:
+        description: 'Run first-time server setup'
+        required: true
+        type: boolean
+        default: false
+      deploy:
+        description: 'Deploy telemetry server to remote server'
+        required: true
+        type: boolean
+        default: false
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.24'
+
+      - name: Build Telemetry Server
+        run: |
+          go mod tidy
+          cd telemetry/server
+          GOOS=linux GOARCH=amd64 go build -o telemetry-server main.go
+
+      - name: First-time Server Setup
+        if: github.event_name == 'workflow_dispatch' && inputs.setup
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.TELEMETRY_SSH_PRIVATE_KEY }}
+          REMOTE_HOST: ${{ secrets.TELEMETRY_HOST }}
+          REMOTE_USER: ${{ secrets.TELEMETRY_USER }}
+        run: |
+          mkdir -p ~/.ssh
+          echo "$SSH_PRIVATE_KEY" > ~/.ssh/deploy_key
+          chmod 600 ~/.ssh/deploy_key
+          echo "Host *" > ~/.ssh/config
+          echo "  StrictHostKeyChecking no" >> ~/.ssh/config
+
+          # Create all required directories with proper permissions
+          ssh -i ~/.ssh/deploy_key $REMOTE_USER@$REMOTE_HOST "
+            mkdir -p ~/seaweedfs-telemetry/bin ~/seaweedfs-telemetry/logs ~/seaweedfs-telemetry/data ~/seaweedfs-telemetry/tmp && \
+            chmod 755 ~/seaweedfs-telemetry/logs && \
+            chmod 755 ~/seaweedfs-telemetry/data && \
+            touch ~/seaweedfs-telemetry/logs/telemetry.log ~/seaweedfs-telemetry/logs/telemetry.error.log && \
+            chmod 644 ~/seaweedfs-telemetry/logs/*.log"
+
+          # Create systemd service file
+          echo "
+          [Unit]
+          Description=SeaweedFS Telemetry Server
+          After=network.target
+
+          [Service]
+          Type=simple
+          User=$REMOTE_USER
+          WorkingDirectory=/home/$REMOTE_USER/seaweedfs-telemetry
+          ExecStart=/home/$REMOTE_USER/seaweedfs-telemetry/bin/telemetry-server -port=8353
+          Restart=always
+          RestartSec=5
+          StandardOutput=append:/home/$REMOTE_USER/seaweedfs-telemetry/logs/telemetry.log
+          StandardError=append:/home/$REMOTE_USER/seaweedfs-telemetry/logs/telemetry.error.log
+
+          [Install]
+          WantedBy=multi-user.target" > telemetry.service
+
+          # Setup logrotate configuration
+          echo "# SeaweedFS Telemetry service log rotation
+          /home/$REMOTE_USER/seaweedfs-telemetry/logs/*.log {
+              daily
+              rotate 30
+              compress
+              delaycompress
+              missingok
+              notifempty
+              create 644 $REMOTE_USER $REMOTE_USER
+              postrotate
+                  systemctl restart telemetry.service
+              endscript
+          }" > telemetry_logrotate
+
+          # Copy Grafana dashboard and Prometheus config
+          scp -i ~/.ssh/deploy_key telemetry/grafana-dashboard.json $REMOTE_USER@$REMOTE_HOST:~/seaweedfs-telemetry/
+          scp -i ~/.ssh/deploy_key telemetry/prometheus.yml $REMOTE_USER@$REMOTE_HOST:~/seaweedfs-telemetry/
+
+          # Copy and install service and logrotate files
+          scp -i ~/.ssh/deploy_key telemetry.service telemetry_logrotate $REMOTE_USER@$REMOTE_HOST:~/seaweedfs-telemetry/
+          ssh -i ~/.ssh/deploy_key $REMOTE_USER@$REMOTE_HOST "
+            sudo mv ~/seaweedfs-telemetry/telemetry.service /etc/systemd/system/ && \
+            sudo mv ~/seaweedfs-telemetry/telemetry_logrotate /etc/logrotate.d/seaweedfs-telemetry && \
+            sudo systemctl daemon-reload && \
+            sudo systemctl enable telemetry.service"
+
+          rm -f ~/.ssh/deploy_key
+
+      - name: Deploy Telemetry Server to Remote Server
+        if: (github.event_name == 'push' && contains(github.ref, 'refs/heads/master')) || (github.event_name == 'workflow_dispatch' && inputs.deploy)
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.TELEMETRY_SSH_PRIVATE_KEY }}
+          REMOTE_HOST: ${{ secrets.TELEMETRY_HOST }}
+          REMOTE_USER: ${{ secrets.TELEMETRY_USER }}
+        run: |
+          mkdir -p ~/.ssh
+          echo "$SSH_PRIVATE_KEY" > ~/.ssh/deploy_key
+          chmod 600 ~/.ssh/deploy_key
+          echo "Host *" > ~/.ssh/config
+          echo "  StrictHostKeyChecking no" >> ~/.ssh/config
+
+          # Create temp directory and copy binary
+          ssh -i ~/.ssh/deploy_key $REMOTE_USER@$REMOTE_HOST "mkdir -p ~/seaweedfs-telemetry/tmp"
+          scp -i ~/.ssh/deploy_key telemetry/server/telemetry-server $REMOTE_USER@$REMOTE_HOST:~/seaweedfs-telemetry/tmp/
+
+          # Copy updated configuration files
+          scp -i ~/.ssh/deploy_key telemetry/grafana-dashboard.json $REMOTE_USER@$REMOTE_HOST:~/seaweedfs-telemetry/
+          scp -i ~/.ssh/deploy_key telemetry/prometheus.yml $REMOTE_USER@$REMOTE_HOST:~/seaweedfs-telemetry/
+
+          # Stop service, move binary, and restart
+          ssh -i ~/.ssh/deploy_key $REMOTE_USER@$REMOTE_HOST "
+            sudo systemctl stop telemetry.service || true && \
+            mkdir -p ~/seaweedfs-telemetry/bin && \
+            mv ~/seaweedfs-telemetry/tmp/telemetry-server ~/seaweedfs-telemetry/bin/ && \
+            chmod +x ~/seaweedfs-telemetry/bin/telemetry-server && \
+            sudo systemctl start telemetry.service && \
+            sudo systemctl status telemetry.service"
+
+          # Verify deployment
+          ssh -i ~/.ssh/deploy_key $REMOTE_USER@$REMOTE_HOST "
+            echo 'Waiting for service to start...'
+            sleep 5
+            curl -f http://localhost:8353/health || echo 'Health check failed'"
+
+          rm -f ~/.ssh/deploy_key
+
+      - name: Notify Deployment Status
+        if: always()
+        run: |
+          if [ "${{ job.status }}" == "success" ]; then
+            echo "✅ Telemetry server deployment successful"
+            echo "Dashboard: http://${{ secrets.TELEMETRY_HOST }}:8353"
+            echo "Metrics: http://${{ secrets.TELEMETRY_HOST }}:8353/metrics"
+          else
+            echo "❌ Telemetry server deployment failed"
+          fi 

telemetry/DEPLOYMENT.md

@@ -0,0 +1,271 @@
+# SeaweedFS Telemetry Server Deployment
+
+This document describes how to deploy the SeaweedFS telemetry server to a remote server using GitHub Actions.
+
+## Prerequisites
+
+1. A remote Linux server with:
+   - SSH access
+   - systemd (for service management)
+   - Optional: Prometheus and Grafana (for monitoring)
+
+2. GitHub repository secrets configured (see [Setup GitHub Secrets](#setup-github-secrets) below):
+   - `TELEMETRY_SSH_PRIVATE_KEY`: SSH private key for accessing the remote server
+   - `TELEMETRY_HOST`: Remote server hostname or IP address
+   - `TELEMETRY_USER`: Username for SSH access
+
+## Setup GitHub Secrets
+
+Before using the deployment workflow, you need to configure the required secrets in your GitHub repository.
+
+### Step 1: Generate SSH Key Pair
+
+On your local machine, generate a new SSH key pair specifically for deployment:
+
+```bash
+# Generate a new SSH key pair
+ssh-keygen -t ed25519 -C "seaweedfs-telemetry-deploy" -f ~/.ssh/seaweedfs_telemetry_deploy
+
+# This creates two files:
+# ~/.ssh/seaweedfs_telemetry_deploy     (private key)
+# ~/.ssh/seaweedfs_telemetry_deploy.pub (public key)
+```
+
+### Step 2: Configure Remote Server
+
+Copy the public key to your remote server:
+
+```bash
+# Copy public key to remote server
+ssh-copy-id -i ~/.ssh/seaweedfs_telemetry_deploy.pub user@your-server.com
+
+# Or manually append to authorized_keys
+cat ~/.ssh/seaweedfs_telemetry_deploy.pub | ssh user@your-server.com "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys"
+```
+
+Test the SSH connection:
+
+```bash
+# Test SSH connection with the new key
+ssh -i ~/.ssh/seaweedfs_telemetry_deploy user@your-server.com "echo 'SSH connection successful'"
+```
+
+### Step 3: Add Secrets to GitHub Repository
+
+1. Go to your GitHub repository
+2. Click on **Settings** tab
+3. In the sidebar, click **Secrets and variables** → **Actions**
+4. Click **New repository secret** for each of the following:
+
+#### TELEMETRY_SSH_PRIVATE_KEY
+
+```bash
+# Display the private key content
+cat ~/.ssh/seaweedfs_telemetry_deploy
+```
+
+- **Name**: `TELEMETRY_SSH_PRIVATE_KEY`
+- **Value**: Copy the entire private key content, including the `-----BEGIN OPENSSH PRIVATE KEY-----` and `-----END OPENSSH PRIVATE KEY-----` lines
+
+#### TELEMETRY_HOST
+
+- **Name**: `TELEMETRY_HOST`
+- **Value**: Your server's hostname or IP address (e.g., `telemetry.example.com` or `192.168.1.100`)
+
+#### TELEMETRY_USER
+
+- **Name**: `TELEMETRY_USER`
+- **Value**: The username on the remote server (e.g., `ubuntu`, `deploy`, or your username)
+
+### Step 4: Verify Configuration
+
+Create a simple test workflow or manually trigger the deployment to verify the secrets are working correctly.
+
+### Security Best Practices
+
+1. **Dedicated SSH Key**: Use a separate SSH key only for deployment
+2. **Limited Permissions**: Create a dedicated user on the remote server with minimal required permissions
+3. **Key Rotation**: Regularly rotate SSH keys
+4. **Server Access**: Restrict SSH access to specific IP ranges if possible
+
+### Example Server Setup
+
+If you're setting up a new server, here's a basic configuration:
+
+```bash
+# On the remote server, create a dedicated user for deployment
+sudo useradd -m -s /bin/bash seaweedfs-deploy
+sudo usermod -aG sudo seaweedfs-deploy  # Only if sudo access is needed
+
+# Switch to the deployment user
+sudo su - seaweedfs-deploy
+
+# Create SSH directory
+mkdir -p ~/.ssh
+chmod 700 ~/.ssh
+
+# Add your public key (paste the content of seaweedfs_telemetry_deploy.pub)
+nano ~/.ssh/authorized_keys
+chmod 600 ~/.ssh/authorized_keys
+```
+
+### Troubleshooting
+
+#### SSH Connection Issues
+
+```bash
+# Test SSH connection manually
+ssh -i ~/.ssh/seaweedfs_telemetry_deploy -v user@your-server.com
+
+# Check SSH key permissions
+ls -la ~/.ssh/seaweedfs_telemetry_deploy*
+# Should show: -rw------- for private key, -rw-r--r-- for public key
+```
+
+#### GitHub Actions Fails
+
+1. **Check secrets**: Ensure all three secrets are properly set in GitHub
+2. **Verify SSH key**: Make sure the entire private key (including headers/footers) is copied
+3. **Test connectivity**: Manually SSH to the server from your local machine
+4. **Check user permissions**: Ensure the remote user has necessary permissions
+
+## GitHub Actions Workflow
+
+The deployment workflow (`.github/workflows/deploy_telemetry.yml`) provides two main operations:
+
+### 1. First-time Setup
+
+Run this once to set up the remote server:
+
+1. Go to GitHub Actions in your repository
+2. Select "Deploy Telemetry Server" workflow
+3. Click "Run workflow"
+4. Check "Run first-time server setup"
+5. Click "Run workflow"
+
+This will:
+- Create necessary directories on the remote server
+- Set up systemd service configuration
+- Configure log rotation
+- Upload Grafana dashboard and Prometheus configuration
+
+
+### 2. Deploy Updates
+
+Deployments happen automatically when:
+- Code is pushed to the `master` branch with changes in the `telemetry/` directory
+
+Or manually trigger deployment:
+1. Go to GitHub Actions in your repository
+2. Select "Deploy Telemetry Server" workflow
+3. Click "Run workflow"
+4. Check "Deploy telemetry server to remote server"
+5. Click "Run workflow"
+
+## Server Directory Structure
+
+After setup, the remote server will have:
+
+```
+~/seaweedfs-telemetry/
+├── bin/
+│   └── telemetry-server          # Binary executable
+├── logs/
+│   ├── telemetry.log            # Application logs
+│   └── telemetry.error.log      # Error logs
+├── data/                        # Data directory (if needed)
+├── grafana-dashboard.json       # Grafana dashboard configuration
+└── prometheus.yml               # Prometheus configuration
+```
+
+## Service Management
+
+The telemetry server runs as a systemd service:
+
+```bash
+# Check service status
+sudo systemctl status telemetry.service
+
+# View logs
+sudo journalctl -u telemetry.service -f
+
+# Restart service
+sudo systemctl restart telemetry.service
+
+# Stop/start service
+sudo systemctl stop telemetry.service
+sudo systemctl start telemetry.service
+```
+
+## Accessing the Service
+
+After deployment, the telemetry server will be available at:
+
+- **Dashboard**: `http://your-server:8353`
+- **API**: `http://your-server:8353/api/*`
+- **Metrics**: `http://your-server:8353/metrics`
+- **Health Check**: `http://your-server:8353/health`
+
+## Optional: Prometheus and Grafana Integration
+
+### Prometheus Setup
+
+1. Install Prometheus on your server
+2. Update `/etc/prometheus/prometheus.yml` to include:
+   ```yaml
+   scrape_configs:
+     - job_name: 'seaweedfs-telemetry'
+       static_configs:
+         - targets: ['localhost:8353']
+       metrics_path: '/metrics'
+   ```
+
+### Grafana Setup
+
+1. Install Grafana on your server
+2. Import the dashboard from `~/seaweedfs-telemetry/grafana-dashboard.json`
+3. Configure Prometheus as a data source pointing to your Prometheus instance
+
+## Troubleshooting
+
+### Deployment Fails
+
+1. Check GitHub Actions logs for detailed error messages
+2. Verify SSH connectivity: `ssh user@host`
+3. Ensure all required secrets are configured in GitHub
+
+### Service Won't Start
+
+1. Check service logs: `sudo journalctl -u telemetry.service`
+2. Verify binary permissions: `ls -la ~/seaweedfs-telemetry/bin/`
+3. Test binary manually: `~/seaweedfs-telemetry/bin/telemetry-server -help`
+
+### Port Conflicts
+
+If port 8353 is already in use:
+
+1. Edit the systemd service: `sudo systemctl edit telemetry.service`
+2. Add override configuration:
+   ```ini
+   [Service]
+   ExecStart=
+   ExecStart=/home/user/seaweedfs-telemetry/bin/telemetry-server -port=8354
+   ```
+3. Reload and restart: `sudo systemctl daemon-reload && sudo systemctl restart telemetry.service`
+
+## Security Considerations
+
+1. **Firewall**: Consider restricting access to telemetry ports
+2. **SSH Keys**: Use dedicated SSH keys with minimal permissions
+3. **User Permissions**: Run the service as a non-privileged user
+4. **Network**: Consider running on internal networks only
+
+## Monitoring
+
+Monitor the deployment and service health:
+
+- **GitHub Actions**: Check workflow runs for deployment status
+- **System Logs**: `sudo journalctl -u telemetry.service`
+- **Application Logs**: `tail -f ~/seaweedfs-telemetry/logs/telemetry.log`
+- **Health Endpoint**: `curl http://localhost:8353/health`
+- **Metrics**: `curl http://localhost:8353/metrics` 

telemetry/README.md

@@ -0,0 +1,351 @@
+# SeaweedFS Telemetry System
+
+A privacy-respecting telemetry system for SeaweedFS that collects cluster-level usage statistics and provides visualization through Prometheus and Grafana.
+
+## Features
+
+- **Privacy-First Design**: Uses in-memory cluster IDs (regenerated on restart), no personal data collection
+- **Prometheus Integration**: Native Prometheus metrics for monitoring and alerting
+- **Grafana Dashboards**: Pre-built dashboards for data visualization
+- **Protocol Buffers**: Efficient binary data transmission for optimal performance
+- **Opt-in Only**: Disabled by default, requires explicit configuration
+- **Docker Compose**: Complete monitoring stack deployment
+- **Automatic Cleanup**: Configurable data retention policies
+
+## Architecture
+
+```
+SeaweedFS Cluster → Telemetry Client → Telemetry Server → Prometheus → Grafana
+                       (protobuf)         (metrics)      (queries)
+```
+
+## Data Transmission
+
+The telemetry system uses **Protocol Buffers exclusively** for efficient binary data transmission:
+
+- **Compact Format**: 30-50% smaller than JSON
+- **Fast Serialization**: Better performance than text-based formats
+- **Type Safety**: Strong typing with generated Go structs
+- **Schema Evolution**: Built-in versioning support
+
+### Protobuf Schema
+
+```protobuf
+message TelemetryData {
+  string cluster_id = 1;           // In-memory generated UUID
+  string version = 2;              // SeaweedFS version
+  string os = 3;                   // Operating system
+  repeated string features = 4;     // Enabled features
+  string deployment = 5;           // Deployment type
+  int32 volume_server_count = 6;   // Number of volume servers
+  uint64 total_disk_bytes = 7;     // Total disk usage
+  int32 total_volume_count = 8;    // Total volume count
+  int64 timestamp = 9;             // Collection timestamp
+}
+```
+
+## Privacy Approach
+
+- **No Personal Data**: No hostnames, IP addresses, or user information
+- **In-Memory IDs**: Cluster IDs are generated in-memory and change on restart
+- **Aggregated Data**: Only cluster-level statistics, no individual file/user data
+- **Opt-in Only**: Telemetry is disabled by default
+- **Transparent**: Open source implementation, clear data collection policy
+
+## Collected Data
+
+| Field | Description | Example |
+|-------|-------------|---------|
+| `cluster_id` | In-memory UUID (changes on restart) | `a1b2c3d4-...` |
+| `version` | SeaweedFS version | `3.45` |
+| `os` | Operating system and architecture | `linux/amd64` |
+| `features` | Enabled components | `["filer", "s3api"]` |
+| `deployment` | Deployment type | `cluster` |
+| `volume_server_count` | Number of volume servers | `5` |
+| `total_disk_bytes` | Total disk usage across cluster | `1073741824` |
+| `total_volume_count` | Total number of volumes | `120` |
+| `timestamp` | When data was collected | `1640995200` |
+
+## Quick Start
+
+### 1. Deploy Telemetry Server
+
+```bash
+# Clone and start the complete monitoring stack
+git clone https://github.com/seaweedfs/seaweedfs.git
+cd seaweedfs/telemetry
+docker-compose up -d
+
+# Or run the server directly
+cd server
+go run . -port=8080 -dashboard=true
+```
+
+### 2. Configure SeaweedFS
+
+```bash
+# Enable telemetry in SeaweedFS master (uses default telemetry.seaweedfs.com:3091)
+weed master -telemetry=true
+
+# Or in server mode
+weed server -telemetry=true
+
+# Or specify custom telemetry server
+weed master -telemetry=true -telemetry.url=http://localhost:8080/api/collect
+```
+
+### 3. Access Dashboards
+
+- **Telemetry Server**: http://localhost:8080
+- **Prometheus**: http://localhost:9090
+- **Grafana**: http://localhost:3000 (admin/admin)
+
+## Configuration
+
+### SeaweedFS Master/Server
+
+```bash
+# Enable telemetry
+-telemetry=true
+
+# Set custom telemetry server URL (optional, defaults to telemetry.seaweedfs.com:3091)
+-telemetry.url=http://your-telemetry-server:8080/api/collect
+```
+
+### Telemetry Server
+
+```bash
+# Server configuration
+-port=8080                    # Server port
+-dashboard=true               # Enable built-in dashboard
+-cleanup=24h                  # Cleanup interval
+-max-age=720h                 # Maximum data retention (30 days)
+
+# Example
+./telemetry-server -port=8080 -dashboard=true -cleanup=24h -max-age=720h
+```
+
+## Prometheus Metrics
+
+The telemetry server exposes these Prometheus metrics:
+
+### Cluster Metrics
+- `seaweedfs_telemetry_total_clusters`: Total unique clusters (30 days)
+- `seaweedfs_telemetry_active_clusters`: Active clusters (7 days)
+
+### Per-Cluster Metrics
+- `seaweedfs_telemetry_volume_servers{cluster_id, version, os, deployment}`: Volume servers per cluster
+- `seaweedfs_telemetry_disk_bytes{cluster_id, version, os, deployment}`: Disk usage per cluster  
+- `seaweedfs_telemetry_volume_count{cluster_id, version, os, deployment}`: Volume count per cluster
+- `seaweedfs_telemetry_filer_count{cluster_id, version, os, deployment}`: Filer servers per cluster
+- `seaweedfs_telemetry_broker_count{cluster_id, version, os, deployment}`: Broker servers per cluster
+- `seaweedfs_telemetry_cluster_info{cluster_id, version, os, deployment, features}`: Cluster metadata
+
+### Server Metrics
+- `seaweedfs_telemetry_reports_received_total`: Total telemetry reports received
+
+## API Endpoints
+
+### Data Collection
+```bash
+# Submit telemetry data (protobuf only)
+POST /api/collect
+Content-Type: application/x-protobuf
+[TelemetryRequest protobuf data]
+```
+
+### Statistics (JSON for dashboard/debugging)
+```bash
+# Get aggregated statistics
+GET /api/stats
+
+# Get recent cluster instances
+GET /api/instances?limit=100
+
+# Get metrics over time
+GET /api/metrics?days=30
+```
+
+### Monitoring
+```bash
+# Prometheus metrics
+GET /metrics
+```
+
+## Docker Deployment
+
+### Complete Stack (Recommended)
+
+```yaml
+# docker-compose.yml
+version: '3.8'
+services:
+  telemetry-server:
+    build: ./server
+    ports:
+      - "8080:8080"
+    command: ["-port=8080", "-dashboard=true", "-cleanup=24h"]
+    
+  prometheus:
+    image: prom/prometheus:latest
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml
+      
+  grafana:
+    image: grafana/grafana:latest
+    ports:
+      - "3000:3000"
+    environment:
+      - GF_SECURITY_ADMIN_PASSWORD=admin
+    volumes:
+      - ./grafana-provisioning:/etc/grafana/provisioning
+      - ./grafana-dashboard.json:/var/lib/grafana/dashboards/seaweedfs.json
+```
+
+```bash
+# Deploy the stack
+docker-compose up -d
+
+# Scale telemetry server if needed
+docker-compose up -d --scale telemetry-server=3
+```
+
+### Server Only
+
+```bash
+# Build and run telemetry server
+cd server
+docker build -t seaweedfs-telemetry .
+docker run -p 8080:8080 seaweedfs-telemetry -port=8080 -dashboard=true
+```
+
+## Development
+
+### Protocol Buffer Development
+
+```bash
+# Generate protobuf code
+cd telemetry
+protoc --go_out=. --go_opt=paths=source_relative proto/telemetry.proto
+
+# The generated code is already included in the repository
+```
+
+### Build from Source
+
+```bash
+# Build telemetry server
+cd telemetry/server
+go build -o telemetry-server .
+
+# Build SeaweedFS with telemetry support
+cd ../..
+go build -o weed ./weed
+```
+
+### Testing
+
+```bash
+# Test telemetry server
+cd telemetry/server
+go test ./...
+
+# Test protobuf communication (requires protobuf tools)
+# See telemetry client code for examples
+```
+
+## Grafana Dashboard
+
+The included Grafana dashboard provides:
+
+- **Overview**: Total and active clusters, version distribution
+- **Resource Usage**: Volume servers and disk usage over time  
+- **Deployments**: Deployment type and OS distribution
+- **Growth Trends**: Historical growth patterns
+
+### Custom Queries
+
+```promql
+# Total active clusters
+seaweedfs_telemetry_active_clusters
+
+# Disk usage by version
+sum by (version) (seaweedfs_telemetry_disk_bytes)
+
+# Volume servers by deployment type
+sum by (deployment) (seaweedfs_telemetry_volume_servers)
+
+# Filer servers by version
+sum by (version) (seaweedfs_telemetry_filer_count)
+
+# Broker servers across all clusters
+sum(seaweedfs_telemetry_broker_count)
+
+# Growth rate (weekly)
+increase(seaweedfs_telemetry_total_clusters[7d])
+```
+
+## Security Considerations
+
+- **Network Security**: Use HTTPS in production environments
+- **Access Control**: Implement authentication for Grafana and Prometheus
+- **Data Retention**: Configure appropriate retention policies
+- **Monitoring**: Monitor the telemetry infrastructure itself
+
+## Troubleshooting
+
+### Common Issues
+
+**SeaweedFS not sending data:**
+```bash
+# Check telemetry configuration
+weed master -h | grep telemetry
+
+# Verify connectivity
+curl -v http://your-telemetry-server:8080/api/collect
+```
+
+**Server not receiving data:**
+```bash
+# Check server logs
+docker-compose logs telemetry-server
+
+# Verify metrics endpoint
+curl http://localhost:8080/metrics
+```
+
+**Prometheus not scraping:**
+```bash
+# Check Prometheus targets
+curl http://localhost:9090/api/v1/targets
+
+# Verify configuration
+docker-compose logs prometheus
+```
+
+### Debugging
+
+```bash
+# Enable verbose logging in SeaweedFS
+weed master -v=2 -telemetry=true
+
+# Check telemetry server metrics
+curl http://localhost:8080/metrics | grep seaweedfs_telemetry
+
+# Test data flow
+curl http://localhost:8080/api/stats
+```
+
+## Contributing
+
+1. Fork the repository
+2. Create a feature branch
+3. Make your changes
+4. Add tests if applicable
+5. Submit a pull request
+
+## License
+
+This telemetry system is part of SeaweedFS and follows the same Apache 2.0 license. 

telemetry/docker-compose.yml

@@ -0,0 +1,55 @@
+version: '3.8'
+
+services:
+  telemetry-server:
+    build: ./server
+    ports:
+      - "8080:8080"
+    command: [
+      "./telemetry-server",
+      "-port=8080",
+      "-dashboard=false",  # Disable built-in dashboard, use Grafana
+      "-log=true",
+      "-cors=true"
+    ]
+    networks:
+      - telemetry
+
+  prometheus:
+    image: prom/prometheus:latest
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml
+      - prometheus_data:/prometheus
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+      - '--storage.tsdb.path=/prometheus'
+      - '--web.console.libraries=/etc/prometheus/console_libraries'
+      - '--web.console.templates=/etc/prometheus/consoles'
+      - '--storage.tsdb.retention.time=200h'
+      - '--web.enable-lifecycle'
+    networks:
+      - telemetry
+
+  grafana:
+    image: grafana/grafana:latest
+    ports:
+      - "3000:3000"
+    environment:
+      - GF_SECURITY_ADMIN_PASSWORD=admin
+      - GF_USERS_ALLOW_SIGN_UP=false
+    volumes:
+      - grafana_data:/var/lib/grafana
+      - ./grafana-dashboard.json:/var/lib/grafana/dashboards/seaweedfs-telemetry.json
+      - ./grafana-provisioning:/etc/grafana/provisioning
+    networks:
+      - telemetry
+
+volumes:
+  prometheus_data:
+  grafana_data:
+
+networks:
+  telemetry:
+    driver: bridge 

telemetry/grafana-dashboard.json

@@ -0,0 +1,734 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": {
+          "type": "grafana",
+          "uid": "-- Grafana --"
+        },
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 0,
+  "id": null,
+  "links": [],
+  "liveNow": false,
+  "panels": [
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "thresholds"
+          },
+          "custom": {
+            "align": "auto",
+            "cellOptions": {
+              "type": "auto"
+            },
+            "inspect": false
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "id": 1,
+      "options": {
+        "showHeader": true
+      },
+      "pluginVersion": "10.0.0",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "seaweedfs_telemetry_total_clusters",
+          "format": "time_series",
+          "refId": "A"
+        }
+      ],
+             "title": "Total SeaweedFS Clusters",
+      "type": "stat"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "thresholds"
+          },
+          "custom": {
+            "align": "auto",
+            "cellOptions": {
+              "type": "auto"
+            },
+            "inspect": false
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "id": 2,
+      "options": {
+        "showHeader": true
+      },
+      "pluginVersion": "10.0.0",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "seaweedfs_telemetry_active_clusters",
+          "format": "time_series",
+          "refId": "A"
+        }
+      ],
+             "title": "Active Clusters (7 days)",
+      "type": "stat"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "vis": false
+            }
+          },
+          "mappings": []
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "id": 3,
+      "options": {
+        "legend": {
+          "displayMode": "visible",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "pieType": "pie",
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ],
+          "fields": ""
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "count by (version) (seaweedfs_telemetry_cluster_info)",
+          "format": "time_series",
+          "legendFormat": "{{version}}",
+          "refId": "A"
+        }
+      ],
+      "title": "SeaweedFS Version Distribution",
+      "type": "piechart"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "vis": false
+            }
+          },
+          "mappings": []
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 8
+      },
+      "id": 4,
+      "options": {
+        "legend": {
+          "displayMode": "visible",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "pieType": "pie",
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ],
+          "fields": ""
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "count by (os) (seaweedfs_telemetry_cluster_info)",
+          "format": "time_series",
+          "legendFormat": "{{os}}",
+          "refId": "A"
+        }
+      ],
+      "title": "Operating System Distribution",
+      "type": "piechart"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "vis": false
+            },
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 16
+      },
+      "id": 5,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "sum(seaweedfs_telemetry_volume_servers)",
+          "format": "time_series",
+          "legendFormat": "Total Volume Servers",
+          "refId": "A"
+        }
+      ],
+      "title": "Total Volume Servers Over Time",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "vis": false
+            },
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unit": "bytes"
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 24
+      },
+      "id": 6,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "sum(seaweedfs_telemetry_disk_bytes)",
+          "format": "time_series",
+          "legendFormat": "Total Disk Usage",
+          "refId": "A"
+        }
+      ],
+      "title": "Total Disk Usage Over Time",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "vis": false
+            },
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 24
+      },
+      "id": 7,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "sum(seaweedfs_telemetry_volume_count)",
+          "format": "time_series",
+          "legendFormat": "Total Volume Count",
+          "refId": "A"
+        }
+      ],
+      "title": "Total Volume Count Over Time",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "vis": false
+            },
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 32
+      },
+      "id": 8,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "sum(seaweedfs_telemetry_filer_count)",
+          "format": "time_series",
+          "legendFormat": "Total Filer Count",
+          "refId": "A"
+        }
+      ],
+      "title": "Total Filer Servers Over Time",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${DS_PROMETHEUS}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "vis": false
+            },
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 32
+      },
+      "id": 9,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "expr": "sum(seaweedfs_telemetry_broker_count)",
+          "format": "time_series",
+          "legendFormat": "Total Broker Count",
+          "refId": "A"
+        }
+      ],
+      "title": "Total Broker Servers Over Time",
+      "type": "timeseries"
+    }
+  ],
+  "refresh": "5m",
+  "schemaVersion": 38,
+  "style": "dark",
+  "tags": [
+    "seaweedfs",
+    "telemetry"
+  ],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now-24h",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "",
+  "title": "SeaweedFS Telemetry Dashboard",
+  "uid": "seaweedfs-telemetry",
+  "version": 1,
+  "weekStart": ""
+} 

telemetry/grafana-provisioning/dashboards/dashboards.yml

@@ -0,0 +1,12 @@
+apiVersion: 1
+
+providers:
+  - name: 'seaweedfs'
+    orgId: 1
+    folder: ''
+    type: file
+    disableDeletion: false
+    updateIntervalSeconds: 10
+    allowUiUpdates: true
+    options:
+      path: /var/lib/grafana/dashboards 

telemetry/grafana-provisioning/datasources/prometheus.yml

@@ -0,0 +1,9 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
+    editable: true 

telemetry/prometheus.yml

@@ -0,0 +1,15 @@
+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+
+scrape_configs:
+  - job_name: 'seaweedfs-telemetry'
+    static_configs:
+      - targets: ['telemetry-server:8080']
+    scrape_interval: 30s
+    metrics_path: '/metrics'
+    scrape_timeout: 10s 

telemetry/proto/telemetry.pb.go

@@ -0,0 +1,398 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.34.2
+// 	protoc        v5.29.3
+// source: proto/telemetry.proto
+
+package proto
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// TelemetryData represents cluster-level telemetry information
+type TelemetryData struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Unique cluster identifier (generated in-memory)
+	ClusterId string `protobuf:"bytes,1,opt,name=cluster_id,json=clusterId,proto3" json:"cluster_id,omitempty"`
+	// SeaweedFS version
+	Version string `protobuf:"bytes,2,opt,name=version,proto3" json:"version,omitempty"`
+	// Operating system (e.g., "linux/amd64")
+	Os string `protobuf:"bytes,3,opt,name=os,proto3" json:"os,omitempty"`
+	// Enabled features (e.g., ["filer", "s3api", "mq"])
+	Features []string `protobuf:"bytes,4,rep,name=features,proto3" json:"features,omitempty"`
+	// Deployment type ("standalone", "cluster", "master-only", "volume-only")
+	Deployment string `protobuf:"bytes,5,opt,name=deployment,proto3" json:"deployment,omitempty"`
+	// Number of volume servers in the cluster
+	VolumeServerCount int32 `protobuf:"varint,6,opt,name=volume_server_count,json=volumeServerCount,proto3" json:"volume_server_count,omitempty"`
+	// Total disk usage across all volume servers (in bytes)
+	TotalDiskBytes uint64 `protobuf:"varint,7,opt,name=total_disk_bytes,json=totalDiskBytes,proto3" json:"total_disk_bytes,omitempty"`
+	// Total number of volumes in the cluster
+	TotalVolumeCount int32 `protobuf:"varint,8,opt,name=total_volume_count,json=totalVolumeCount,proto3" json:"total_volume_count,omitempty"`
+	// Number of filer servers in the cluster
+	FilerCount int32 `protobuf:"varint,9,opt,name=filer_count,json=filerCount,proto3" json:"filer_count,omitempty"`
+	// Number of broker servers in the cluster
+	BrokerCount int32 `protobuf:"varint,10,opt,name=broker_count,json=brokerCount,proto3" json:"broker_count,omitempty"`
+	// Unix timestamp when the data was collected
+	Timestamp int64 `protobuf:"varint,11,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+}
+
+func (x *TelemetryData) Reset() {
+	*x = TelemetryData{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_telemetry_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TelemetryData) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TelemetryData) ProtoMessage() {}
+
+func (x *TelemetryData) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_telemetry_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TelemetryData.ProtoReflect.Descriptor instead.
+func (*TelemetryData) Descriptor() ([]byte, []int) {
+	return file_proto_telemetry_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *TelemetryData) GetClusterId() string {
+	if x != nil {
+		return x.ClusterId
+	}
+	return ""
+}
+
+func (x *TelemetryData) GetVersion() string {
+	if x != nil {
+		return x.Version
+	}
+	return ""
+}
+
+func (x *TelemetryData) GetOs() string {
+	if x != nil {
+		return x.Os
+	}
+	return ""
+}
+
+func (x *TelemetryData) GetFeatures() []string {
+	if x != nil {
+		return x.Features
+	}
+	return nil
+}
+
+func (x *TelemetryData) GetDeployment() string {
+	if x != nil {
+		return x.Deployment
+	}
+	return ""
+}
+
+func (x *TelemetryData) GetVolumeServerCount() int32 {
+	if x != nil {
+		return x.VolumeServerCount
+	}
+	return 0
+}
+
+func (x *TelemetryData) GetTotalDiskBytes() uint64 {
+	if x != nil {
+		return x.TotalDiskBytes
+	}
+	return 0
+}
+
+func (x *TelemetryData) GetTotalVolumeCount() int32 {
+	if x != nil {
+		return x.TotalVolumeCount
+	}
+	return 0
+}
+
+func (x *TelemetryData) GetFilerCount() int32 {
+	if x != nil {
+		return x.FilerCount
+	}
+	return 0
+}
+
+func (x *TelemetryData) GetBrokerCount() int32 {
+	if x != nil {
+		return x.BrokerCount
+	}
+	return 0
+}
+
+func (x *TelemetryData) GetTimestamp() int64 {
+	if x != nil {
+		return x.Timestamp
+	}
+	return 0
+}
+
+// TelemetryRequest is sent from SeaweedFS clusters to the telemetry server
+type TelemetryRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Data *TelemetryData `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
+}
+
+func (x *TelemetryRequest) Reset() {
+	*x = TelemetryRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_telemetry_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TelemetryRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TelemetryRequest) ProtoMessage() {}
+
+func (x *TelemetryRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_telemetry_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TelemetryRequest.ProtoReflect.Descriptor instead.
+func (*TelemetryRequest) Descriptor() ([]byte, []int) {
+	return file_proto_telemetry_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *TelemetryRequest) GetData() *TelemetryData {
+	if x != nil {
+		return x.Data
+	}
+	return nil
+}
+
+// TelemetryResponse is returned by the telemetry server
+type TelemetryResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Success bool   `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
+	Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *TelemetryResponse) Reset() {
+	*x = TelemetryResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_telemetry_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TelemetryResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TelemetryResponse) ProtoMessage() {}
+
+func (x *TelemetryResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_telemetry_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TelemetryResponse.ProtoReflect.Descriptor instead.
+func (*TelemetryResponse) Descriptor() ([]byte, []int) {
+	return file_proto_telemetry_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *TelemetryResponse) GetSuccess() bool {
+	if x != nil {
+		return x.Success
+	}
+	return false
+}
+
+func (x *TelemetryResponse) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+var File_proto_telemetry_proto protoreflect.FileDescriptor
+
+var file_proto_telemetry_proto_rawDesc = []byte{
+	0x0a, 0x15, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72,
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+	0x5a, 0x2e, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x73, 0x65, 0x61,
+	0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2f, 0x73, 0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73,
+	0x2f, 0x74, 0x65, 0x6c, 0x65, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_proto_telemetry_proto_rawDescOnce sync.Once
+	file_proto_telemetry_proto_rawDescData = file_proto_telemetry_proto_rawDesc
+)
+
+func file_proto_telemetry_proto_rawDescGZIP() []byte {
+	file_proto_telemetry_proto_rawDescOnce.Do(func() {
+		file_proto_telemetry_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_telemetry_proto_rawDescData)
+	})
+	return file_proto_telemetry_proto_rawDescData
+}
+
+var file_proto_telemetry_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_proto_telemetry_proto_goTypes = []any{
+	(*TelemetryData)(nil),     // 0: telemetry.TelemetryData
+	(*TelemetryRequest)(nil),  // 1: telemetry.TelemetryRequest
+	(*TelemetryResponse)(nil), // 2: telemetry.TelemetryResponse
+}
+var file_proto_telemetry_proto_depIdxs = []int32{
+	0, // 0: telemetry.TelemetryRequest.data:type_name -> telemetry.TelemetryData
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_proto_telemetry_proto_init() }
+func file_proto_telemetry_proto_init() {
+	if File_proto_telemetry_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_proto_telemetry_proto_msgTypes[0].Exporter = func(v any, i int) any {
+			switch v := v.(*TelemetryData); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_telemetry_proto_msgTypes[1].Exporter = func(v any, i int) any {
+			switch v := v.(*TelemetryRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_telemetry_proto_msgTypes[2].Exporter = func(v any, i int) any {
+			switch v := v.(*TelemetryResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proto_telemetry_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_proto_telemetry_proto_goTypes,
+		DependencyIndexes: file_proto_telemetry_proto_depIdxs,
+		MessageInfos:      file_proto_telemetry_proto_msgTypes,
+	}.Build()
+	File_proto_telemetry_proto = out.File
+	file_proto_telemetry_proto_rawDesc = nil
+	file_proto_telemetry_proto_goTypes = nil
+	file_proto_telemetry_proto_depIdxs = nil
+}

telemetry/proto/telemetry.proto

@@ -0,0 +1,52 @@
+syntax = "proto3";
+
+package telemetry;
+
+option go_package = "github.com/seaweedfs/seaweedfs/telemetry/proto";
+
+// TelemetryData represents cluster-level telemetry information
+message TelemetryData {
+  // Unique cluster identifier (generated in-memory)
+  string cluster_id = 1;
+  
+  // SeaweedFS version
+  string version = 2;
+  
+  // Operating system (e.g., "linux/amd64")
+  string os = 3;
+  
+  // Enabled features (e.g., ["filer", "s3api", "mq"])
+  repeated string features = 4;
+  
+  // Deployment type ("standalone", "cluster", "master-only", "volume-only")
+  string deployment = 5;
+  
+  // Number of volume servers in the cluster
+  int32 volume_server_count = 6;
+  
+  // Total disk usage across all volume servers (in bytes)
+  uint64 total_disk_bytes = 7;
+  
+  // Total number of volumes in the cluster
+  int32 total_volume_count = 8;
+  
+  // Number of filer servers in the cluster
+  int32 filer_count = 9;
+  
+  // Number of broker servers in the cluster
+  int32 broker_count = 10;
+  
+  // Unix timestamp when the data was collected
+  int64 timestamp = 11;
+}
+
+// TelemetryRequest is sent from SeaweedFS clusters to the telemetry server
+message TelemetryRequest {
+  TelemetryData data = 1;
+}
+
+// TelemetryResponse is returned by the telemetry server
+message TelemetryResponse {
+  bool success = 1;
+  string message = 2;
+} 

telemetry/server/Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:1.21-alpine AS builder
+
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o telemetry-server .
+
+FROM alpine:latest
+RUN apk --no-cache add ca-certificates
+WORKDIR /root/
+
+COPY --from=builder /app/telemetry-server .
+
+EXPOSE 8080
+
+CMD ["./telemetry-server"] 

telemetry/server/Makefile

@@ -0,0 +1,97 @@
+.PHONY: build run clean test deps proto integration-test test-all
+
+# Build the telemetry server
+build:
+	go build -o telemetry-server .
+
+# Run the server in development mode
+run:
+	go run . -port=8080 -dashboard=true -cleanup=1h -max-age=24h
+
+# Run the server in production mode
+run-prod:
+	./telemetry-server -port=8080 -dashboard=true -cleanup=24h -max-age=720h
+
+# Clean build artifacts
+clean:
+	rm -f telemetry-server
+	rm -f ../test/telemetry-server-test.log
+	go clean
+
+# Run unit tests
+test:
+	go test ./...
+
+# Run integration tests
+integration-test:
+	@echo "🧪 Running telemetry integration tests..."
+	cd ../../ && go run telemetry/test/integration.go
+
+# Run all tests (unit + integration)
+test-all: test integration-test
+
+# Install dependencies
+deps:
+	go mod download
+	go mod tidy
+
+# Generate protobuf code (requires protoc)
+proto:
+	cd .. && protoc --go_out=. --go_opt=paths=source_relative proto/telemetry.proto
+
+# Build Docker image
+docker-build:
+	docker build -t seaweedfs-telemetry .
+
+# Run with Docker
+docker-run:
+	docker run -p 8080:8080 seaweedfs-telemetry -port=8080 -dashboard=true
+
+# Development with auto-reload (requires air: go install github.com/cosmtrek/air@latest)
+dev:
+	air
+
+# Check if protoc is available
+check-protoc:
+	@which protoc > /dev/null || (echo "protoc is required for proto generation. Install from https://grpc.io/docs/protoc-installation/" && exit 1)
+
+# Full development setup
+setup: check-protoc deps proto build
+
+# Run a quick smoke test
+smoke-test: build
+	@echo "🔥 Running smoke test..."
+	@timeout 10s ./telemetry-server -port=18081 > /dev/null 2>&1 & \
+	SERVER_PID=$$!; \
+	sleep 2; \
+	if curl -s http://localhost:18081/health > /dev/null; then \
+		echo "✅ Smoke test passed - server responds to health check"; \
+	else \
+		echo "❌ Smoke test failed - server not responding"; \
+		exit 1; \
+	fi; \
+	kill $$SERVER_PID 2>/dev/null || true
+
+# Continuous integration target
+ci: deps proto build test integration-test
+	@echo "🎉 All CI tests passed!"
+
+# Help
+help:
+	@echo "Available targets:"
+	@echo "  build           - Build the telemetry server binary"
+	@echo "  run             - Run server in development mode"
+	@echo "  run-prod        - Run server in production mode"
+	@echo "  clean           - Clean build artifacts"
+	@echo "  test            - Run unit tests"
+	@echo "  integration-test- Run integration tests"
+	@echo "  test-all        - Run all tests (unit + integration)"
+	@echo "  deps            - Install Go dependencies"
+	@echo "  proto           - Generate protobuf code"
+	@echo "  docker-build    - Build Docker image"
+	@echo "  docker-run      - Run with Docker"
+	@echo "  dev             - Run with auto-reload (requires air)"
+	@echo "  smoke-test      - Quick server health check"
+	@echo "  setup           - Full development setup"
+	@echo "  ci              - Continuous integration (all tests)"
+	@echo "  help            - Show this help" 

telemetry/server/api/handlers.go

@@ -0,0 +1,152 @@
+package api
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/telemetry/proto"
+	"github.com/seaweedfs/seaweedfs/telemetry/server/storage"
+	protobuf "google.golang.org/protobuf/proto"
+)
+
+type Handler struct {
+	storage *storage.PrometheusStorage
+}
+
+func NewHandler(storage *storage.PrometheusStorage) *Handler {
+	return &Handler{storage: storage}
+}
+
+func (h *Handler) CollectTelemetry(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	contentType := r.Header.Get("Content-Type")
+
+	// Only accept protobuf content type
+	if contentType != "application/x-protobuf" && contentType != "application/protobuf" {
+		http.Error(w, "Content-Type must be application/x-protobuf", http.StatusUnsupportedMediaType)
+		return
+	}
+
+	// Read protobuf request
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		http.Error(w, "Failed to read request body", http.StatusBadRequest)
+		return
+	}
+
+	req := &proto.TelemetryRequest{}
+	if err := protobuf.Unmarshal(body, req); err != nil {
+		http.Error(w, "Invalid protobuf data", http.StatusBadRequest)
+		return
+	}
+
+	data := req.Data
+	if data == nil {
+		http.Error(w, "Missing telemetry data", http.StatusBadRequest)
+		return
+	}
+
+	// Validate required fields
+	if data.ClusterId == "" || data.Version == "" || data.Os == "" {
+		http.Error(w, "Missing required fields", http.StatusBadRequest)
+		return
+	}
+
+	// Set timestamp if not provided
+	if data.Timestamp == 0 {
+		data.Timestamp = time.Now().Unix()
+	}
+
+	// Store the telemetry data
+	if err := h.storage.StoreTelemetry(data); err != nil {
+		http.Error(w, "Failed to store data", http.StatusInternalServerError)
+		return
+	}
+
+	// Return protobuf response
+	resp := &proto.TelemetryResponse{
+		Success: true,
+		Message: "Telemetry data received",
+	}
+
+	respData, err := protobuf.Marshal(resp)
+	if err != nil {
+		http.Error(w, "Failed to marshal response", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/x-protobuf")
+	w.WriteHeader(http.StatusOK)
+	w.Write(respData)
+}
+
+func (h *Handler) GetStats(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	stats, err := h.storage.GetStats()
+	if err != nil {
+		http.Error(w, "Failed to get stats", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(stats)
+}
+
+func (h *Handler) GetInstances(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	limitStr := r.URL.Query().Get("limit")
+	limit := 100 // default
+	if limitStr != "" {
+		if l, err := strconv.Atoi(limitStr); err == nil && l > 0 && l <= 1000 {
+			limit = l
+		}
+	}
+
+	instances, err := h.storage.GetInstances(limit)
+	if err != nil {
+		http.Error(w, "Failed to get instances", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(instances)
+}
+
+func (h *Handler) GetMetrics(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	daysStr := r.URL.Query().Get("days")
+	days := 30 // default
+	if daysStr != "" {
+		if d, err := strconv.Atoi(daysStr); err == nil && d > 0 && d <= 365 {
+			days = d
+		}
+	}
+
+	metrics, err := h.storage.GetMetrics(days)
+	if err != nil {
+		http.Error(w, "Failed to get metrics", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(metrics)
+}

telemetry/server/dashboard/dashboard.go

@@ -0,0 +1,278 @@
+package dashboard
+
+import (
+	"net/http"
+)
+
+type Handler struct{}
+
+func NewHandler() *Handler {
+	return &Handler{}
+}
+
+func (h *Handler) ServeIndex(w http.ResponseWriter, r *http.Request) {
+	html := `<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>SeaweedFS Telemetry Dashboard</title>
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <style>
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            margin: 0;
+            padding: 20px;
+            background-color: #f5f5f5;
+        }
+        .container {
+            max-width: 1200px;
+            margin: 0 auto;
+        }
+        .header {
+            background: white;
+            padding: 20px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+        }
+        .stats-grid {
+            display: grid;
+            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+            gap: 20px;
+            margin-bottom: 20px;
+        }
+        .stat-card {
+            background: white;
+            padding: 20px;
+            border-radius: 8px;
+            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+        }
+        .stat-value {
+            font-size: 2em;
+            font-weight: bold;
+            color: #2196F3;
+        }
+        .stat-label {
+            color: #666;
+            margin-top: 5px;
+        }
+        .chart-container {
+            background: white;
+            padding: 20px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+        }
+        .chart-title {
+            font-size: 1.2em;
+            font-weight: bold;
+            margin-bottom: 15px;
+        }
+        .loading {
+            text-align: center;
+            padding: 40px;
+            color: #666;
+        }
+        .error {
+            background: #ffebee;
+            color: #c62828;
+            padding: 15px;
+            border-radius: 4px;
+            margin: 10px 0;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="header">
+            <h1>SeaweedFS Telemetry Dashboard</h1>
+            <p>Privacy-respecting usage analytics for SeaweedFS</p>
+        </div>
+
+        <div id="loading" class="loading">Loading telemetry data...</div>
+        <div id="error" class="error" style="display: none;"></div>
+
+        <div id="dashboard" style="display: none;">
+            <div class="stats-grid">
+                <div class="stat-card">
+                    <div class="stat-value" id="totalInstances">-</div>
+                    <div class="stat-label">Total Instances (30 days)</div>
+                </div>
+                <div class="stat-card">
+                    <div class="stat-value" id="activeInstances">-</div>
+                    <div class="stat-label">Active Instances (7 days)</div>
+                </div>
+                <div class="stat-card">
+                    <div class="stat-value" id="totalVersions">-</div>
+                    <div class="stat-label">Different Versions</div>
+                </div>
+                <div class="stat-card">
+                    <div class="stat-value" id="totalOS">-</div>
+                    <div class="stat-label">Operating Systems</div>
+                </div>
+            </div>
+
+            <div class="chart-container">
+                <div class="chart-title">Version Distribution</div>
+                <canvas id="versionChart" width="400" height="200"></canvas>
+            </div>
+
+            <div class="chart-container">
+                <div class="chart-title">Operating System Distribution</div>
+                <canvas id="osChart" width="400" height="200"></canvas>
+            </div>
+
+            <div class="chart-container">
+                <div class="chart-title">Deployment Types</div>
+                <canvas id="deploymentChart" width="400" height="200"></canvas>
+            </div>
+
+            <div class="chart-container">
+                <div class="chart-title">Volume Servers Over Time</div>
+                <canvas id="serverChart" width="400" height="200"></canvas>
+            </div>
+
+            <div class="chart-container">
+                <div class="chart-title">Total Disk Usage Over Time</div>
+                <canvas id="diskChart" width="400" height="200"></canvas>
+            </div>
+        </div>
+    </div>
+
+    <script>
+        let charts = {};
+
+        async function loadDashboard() {
+            try {
+                // Load stats
+                const statsResponse = await fetch('/api/stats');
+                const stats = await statsResponse.json();
+                
+                // Load metrics
+                const metricsResponse = await fetch('/api/metrics?days=30');
+                const metrics = await metricsResponse.json();
+
+                updateStats(stats);
+                updateCharts(stats, metrics);
+                
+                document.getElementById('loading').style.display = 'none';
+                document.getElementById('dashboard').style.display = 'block';
+            } catch (error) {
+                console.error('Error loading dashboard:', error);
+                showError('Failed to load telemetry data: ' + error.message);
+            }
+        }
+
+        function updateStats(stats) {
+            document.getElementById('totalInstances').textContent = stats.total_instances || 0;
+            document.getElementById('activeInstances').textContent = stats.active_instances || 0;
+            document.getElementById('totalVersions').textContent = Object.keys(stats.versions || {}).length;
+            document.getElementById('totalOS').textContent = Object.keys(stats.os_distribution || {}).length;
+        }
+
+        function updateCharts(stats, metrics) {
+            // Version chart
+            createPieChart('versionChart', 'Version Distribution', stats.versions || {});
+            
+            // OS chart
+            createPieChart('osChart', 'Operating System Distribution', stats.os_distribution || {});
+            
+            // Deployment chart
+            createPieChart('deploymentChart', 'Deployment Types', stats.deployments || {});
+            
+            // Server count over time
+            if (metrics.dates && metrics.server_counts) {
+                createLineChart('serverChart', 'Volume Servers', metrics.dates, metrics.server_counts, '#2196F3');
+            }
+            
+            // Disk usage over time
+            if (metrics.dates && metrics.disk_usage) {
+                const diskUsageGB = metrics.disk_usage.map(bytes => Math.round(bytes / (1024 * 1024 * 1024)));
+                createLineChart('diskChart', 'Disk Usage (GB)', metrics.dates, diskUsageGB, '#4CAF50');
+            }
+        }
+
+        function createPieChart(canvasId, title, data) {
+            const ctx = document.getElementById(canvasId).getContext('2d');
+            
+            if (charts[canvasId]) {
+                charts[canvasId].destroy();
+            }
+            
+            const labels = Object.keys(data);
+            const values = Object.values(data);
+            
+            charts[canvasId] = new Chart(ctx, {
+                type: 'pie',
+                data: {
+                    labels: labels,
+                    datasets: [{
+                        data: values,
+                        backgroundColor: [
+                            '#FF6384', '#36A2EB', '#FFCE56', '#4BC0C0',
+                            '#9966FF', '#FF9F40', '#FF6384', '#C9CBCF'
+                        ]
+                    }]
+                },
+                options: {
+                    responsive: true,
+                    plugins: {
+                        legend: {
+                            position: 'bottom'
+                        }
+                    }
+                }
+            });
+        }
+
+        function createLineChart(canvasId, label, labels, data, color) {
+            const ctx = document.getElementById(canvasId).getContext('2d');
+            
+            if (charts[canvasId]) {
+                charts[canvasId].destroy();
+            }
+            
+            charts[canvasId] = new Chart(ctx, {
+                type: 'line',
+                data: {
+                    labels: labels,
+                    datasets: [{
+                        label: label,
+                        data: data,
+                        borderColor: color,
+                        backgroundColor: color + '20',
+                        fill: true,
+                        tension: 0.1
+                    }]
+                },
+                options: {
+                    responsive: true,
+                    scales: {
+                        y: {
+                            beginAtZero: true
+                        }
+                    }
+                }
+            });
+        }
+
+        function showError(message) {
+            document.getElementById('loading').style.display = 'none';
+            document.getElementById('error').style.display = 'block';
+            document.getElementById('error').textContent = message;
+        }
+
+        // Load dashboard on page load
+        loadDashboard();
+        
+        // Refresh every 5 minutes
+        setInterval(loadDashboard, 5 * 60 * 1000);
+    </script>
+</body>
+</html>`
+
+	w.Header().Set("Content-Type", "text/html")
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte(html))
+}

telemetry/server/go.sum

@@ -0,0 +1,31 @@
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
+github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
+github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
+github.com/prometheus/client_golang v1.17.0 h1:rl2sfwZMtSthVU752MqfjQozy7blglC+1SOtjMAMh+Q=
+github.com/prometheus/client_golang v1.17.0/go.mod h1:VeL+gMmOAxkS2IqfCq0ZmHSL+LjWfWDUmp1mBz9JgUY=
+github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 h1:v7DLqVdK4VrYkVD5diGdl4sxJurKJEMnODWRJlxV9oM=
+github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU=
+github.com/prometheus/common v0.44.0 h1:+5BrQJwiBB9xsMygAB3TNvpQKOwlkc25LbISbrdOOfY=
+github.com/prometheus/common v0.44.0/go.mod h1:ofAIvZbQ1e/nugmZGz4/qCb9Ap1VoSTIO7x0VV9VvuY=
+github.com/prometheus/procfs v0.11.1 h1:xRC8Iq1yyca5ypa9n1EZnWZkt7dwcoRPQwX/5gwaUuI=
+github.com/prometheus/procfs v0.11.1/go.mod h1:eesXgaPo1q7lBpVMoMy0ZOFTth9hBn4W/y0/p/ScXhY=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
+golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=

telemetry/server/main.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"github.com/seaweedfs/seaweedfs/telemetry/server/api"
+	"github.com/seaweedfs/seaweedfs/telemetry/server/dashboard"
+	"github.com/seaweedfs/seaweedfs/telemetry/server/storage"
+)
+
+var (
+	port            = flag.Int("port", 8080, "HTTP server port")
+	enableCORS      = flag.Bool("cors", true, "Enable CORS for dashboard")
+	logRequests     = flag.Bool("log", true, "Log incoming requests")
+	enableDashboard = flag.Bool("dashboard", true, "Enable built-in dashboard (optional when using Grafana)")
+	cleanupInterval = flag.Duration("cleanup", 24*time.Hour, "Cleanup interval for old instances")
+	maxInstanceAge  = flag.Duration("max-age", 30*24*time.Hour, "Maximum age for instances before cleanup")
+)
+
+func main() {
+	flag.Parse()
+
+	// Create Prometheus storage instance
+	store := storage.NewPrometheusStorage()
+
+	// Start cleanup routine
+	go func() {
+		ticker := time.NewTicker(*cleanupInterval)
+		defer ticker.Stop()
+		for range ticker.C {
+			store.CleanupOldInstances(*maxInstanceAge)
+		}
+	}()
+
+	// Setup HTTP handlers
+	mux := http.NewServeMux()
+
+	// Prometheus metrics endpoint
+	mux.Handle("/metrics", promhttp.Handler())
+
+	// API endpoints
+	apiHandler := api.NewHandler(store)
+	mux.HandleFunc("/api/collect", corsMiddleware(logMiddleware(apiHandler.CollectTelemetry)))
+	mux.HandleFunc("/api/stats", corsMiddleware(logMiddleware(apiHandler.GetStats)))
+	mux.HandleFunc("/api/instances", corsMiddleware(logMiddleware(apiHandler.GetInstances)))
+	mux.HandleFunc("/api/metrics", corsMiddleware(logMiddleware(apiHandler.GetMetrics)))
+
+	// Dashboard (optional)
+	if *enableDashboard {
+		dashboardHandler := dashboard.NewHandler()
+		mux.HandleFunc("/", corsMiddleware(dashboardHandler.ServeIndex))
+		mux.HandleFunc("/dashboard", corsMiddleware(dashboardHandler.ServeIndex))
+		mux.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./static"))))
+	}
+
+	// Health check
+	mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]string{
+			"status": "ok",
+			"time":   time.Now().UTC().Format(time.RFC3339),
+		})
+	})
+
+	addr := fmt.Sprintf(":%d", *port)
+	log.Printf("Starting telemetry server on %s", addr)
+	log.Printf("Prometheus metrics: http://localhost%s/metrics", addr)
+	if *enableDashboard {
+		log.Printf("Dashboard: http://localhost%s/dashboard", addr)
+	}
+	log.Printf("Cleanup interval: %v, Max instance age: %v", *cleanupInterval, *maxInstanceAge)
+
+	if err := http.ListenAndServe(addr, mux); err != nil {
+		log.Fatalf("Server failed: %v", err)
+	}
+}
+
+func corsMiddleware(next http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if *enableCORS {
+			w.Header().Set("Access-Control-Allow-Origin", "*")
+			w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+			w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+		}
+
+		if r.Method == "OPTIONS" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+
+		next(w, r)
+	}
+}
+
+func logMiddleware(next http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if *logRequests {
+			start := time.Now()
+			next(w, r)
+			log.Printf("%s %s %s %v", r.Method, r.URL.Path, r.RemoteAddr, time.Since(start))
+		} else {
+			next(w, r)
+		}
+	}
+}

telemetry/server/storage/prometheus.go

@@ -0,0 +1,245 @@
+package storage
+
+import (
+	"encoding/json"
+	"sync"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/seaweedfs/seaweedfs/telemetry/proto"
+)
+
+type PrometheusStorage struct {
+	// Prometheus metrics
+	totalClusters     prometheus.Gauge
+	activeClusters    prometheus.Gauge
+	volumeServerCount *prometheus.GaugeVec
+	totalDiskBytes    *prometheus.GaugeVec
+	totalVolumeCount  *prometheus.GaugeVec
+	filerCount        *prometheus.GaugeVec
+	brokerCount       *prometheus.GaugeVec
+	clusterInfo       *prometheus.GaugeVec
+	telemetryReceived prometheus.Counter
+
+	// In-memory storage for API endpoints (if needed)
+	mu        sync.RWMutex
+	instances map[string]*telemetryData
+	stats     map[string]interface{}
+}
+
+// telemetryData is an internal struct that includes the received timestamp
+type telemetryData struct {
+	*proto.TelemetryData
+	ReceivedAt time.Time `json:"received_at"`
+}
+
+func NewPrometheusStorage() *PrometheusStorage {
+	return &PrometheusStorage{
+		totalClusters: promauto.NewGauge(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_total_clusters",
+			Help: "Total number of unique SeaweedFS clusters (last 30 days)",
+		}),
+		activeClusters: promauto.NewGauge(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_active_clusters",
+			Help: "Number of active SeaweedFS clusters (last 7 days)",
+		}),
+		volumeServerCount: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_volume_servers",
+			Help: "Number of volume servers per cluster",
+		}, []string{"cluster_id", "version", "os", "deployment"}),
+		totalDiskBytes: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_disk_bytes",
+			Help: "Total disk usage in bytes per cluster",
+		}, []string{"cluster_id", "version", "os", "deployment"}),
+		totalVolumeCount: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_volume_count",
+			Help: "Total number of volumes per cluster",
+		}, []string{"cluster_id", "version", "os", "deployment"}),
+		filerCount: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_filer_count",
+			Help: "Number of filer servers per cluster",
+		}, []string{"cluster_id", "version", "os", "deployment"}),
+		brokerCount: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_broker_count",
+			Help: "Number of broker servers per cluster",
+		}, []string{"cluster_id", "version", "os", "deployment"}),
+		clusterInfo: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "seaweedfs_telemetry_cluster_info",
+			Help: "Cluster information (always 1, labels contain metadata)",
+		}, []string{"cluster_id", "version", "os", "deployment", "features"}),
+		telemetryReceived: promauto.NewCounter(prometheus.CounterOpts{
+			Name: "seaweedfs_telemetry_reports_received_total",
+			Help: "Total number of telemetry reports received",
+		}),
+		instances: make(map[string]*telemetryData),
+		stats:     make(map[string]interface{}),
+	}
+}
+
+func (s *PrometheusStorage) StoreTelemetry(data *proto.TelemetryData) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	// Update Prometheus metrics
+	labels := prometheus.Labels{
+		"cluster_id": data.ClusterId,
+		"version":    data.Version,
+		"os":         data.Os,
+		"deployment": data.Deployment,
+	}
+
+	s.volumeServerCount.With(labels).Set(float64(data.VolumeServerCount))
+	s.totalDiskBytes.With(labels).Set(float64(data.TotalDiskBytes))
+	s.totalVolumeCount.With(labels).Set(float64(data.TotalVolumeCount))
+	s.filerCount.With(labels).Set(float64(data.FilerCount))
+	s.brokerCount.With(labels).Set(float64(data.BrokerCount))
+
+	// Features as JSON string for the label
+	featuresJSON, _ := json.Marshal(data.Features)
+	infoLabels := prometheus.Labels{
+		"cluster_id": data.ClusterId,
+		"version":    data.Version,
+		"os":         data.Os,
+		"deployment": data.Deployment,
+		"features":   string(featuresJSON),
+	}
+	s.clusterInfo.With(infoLabels).Set(1)
+
+	s.telemetryReceived.Inc()
+
+	// Store in memory for API endpoints
+	s.instances[data.ClusterId] = &telemetryData{
+		TelemetryData: data,
+		ReceivedAt:    time.Now().UTC(),
+	}
+
+	// Update aggregated stats
+	s.updateStats()
+
+	return nil
+}
+
+func (s *PrometheusStorage) GetStats() (map[string]interface{}, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	// Return cached stats
+	result := make(map[string]interface{})
+	for k, v := range s.stats {
+		result[k] = v
+	}
+	return result, nil
+}
+
+func (s *PrometheusStorage) GetInstances(limit int) ([]*telemetryData, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	var instances []*telemetryData
+	count := 0
+	for _, instance := range s.instances {
+		if count >= limit {
+			break
+		}
+		instances = append(instances, instance)
+		count++
+	}
+
+	return instances, nil
+}
+
+func (s *PrometheusStorage) GetMetrics(days int) (map[string]interface{}, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	// Return current metrics from in-memory storage
+	// Historical data should be queried from Prometheus directly
+	cutoff := time.Now().AddDate(0, 0, -days)
+
+	var volumeServers []map[string]interface{}
+	var diskUsage []map[string]interface{}
+
+	for _, instance := range s.instances {
+		if instance.ReceivedAt.After(cutoff) {
+			volumeServers = append(volumeServers, map[string]interface{}{
+				"date":  instance.ReceivedAt.Format("2006-01-02"),
+				"value": instance.TelemetryData.VolumeServerCount,
+			})
+			diskUsage = append(diskUsage, map[string]interface{}{
+				"date":  instance.ReceivedAt.Format("2006-01-02"),
+				"value": instance.TelemetryData.TotalDiskBytes,
+			})
+		}
+	}
+
+	return map[string]interface{}{
+		"volume_servers": volumeServers,
+		"disk_usage":     diskUsage,
+	}, nil
+}
+
+func (s *PrometheusStorage) updateStats() {
+	now := time.Now()
+	last7Days := now.AddDate(0, 0, -7)
+	last30Days := now.AddDate(0, 0, -30)
+
+	totalInstances := 0
+	activeInstances := 0
+	versions := make(map[string]int)
+	osDistribution := make(map[string]int)
+	deployments := make(map[string]int)
+
+	for _, instance := range s.instances {
+		if instance.ReceivedAt.After(last30Days) {
+			totalInstances++
+		}
+		if instance.ReceivedAt.After(last7Days) {
+			activeInstances++
+			versions[instance.TelemetryData.Version]++
+			osDistribution[instance.TelemetryData.Os]++
+			deployments[instance.TelemetryData.Deployment]++
+		}
+	}
+
+	// Update Prometheus gauges
+	s.totalClusters.Set(float64(totalInstances))
+	s.activeClusters.Set(float64(activeInstances))
+
+	// Update cached stats for API
+	s.stats = map[string]interface{}{
+		"total_instances":  totalInstances,
+		"active_instances": activeInstances,
+		"versions":         versions,
+		"os_distribution":  osDistribution,
+		"deployments":      deployments,
+	}
+}
+
+// CleanupOldInstances removes instances older than the specified duration
+func (s *PrometheusStorage) CleanupOldInstances(maxAge time.Duration) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	cutoff := time.Now().Add(-maxAge)
+	for instanceID, instance := range s.instances {
+		if instance.ReceivedAt.Before(cutoff) {
+			delete(s.instances, instanceID)
+
+			// Remove from Prometheus metrics
+			labels := prometheus.Labels{
+				"cluster_id": instance.TelemetryData.ClusterId,
+				"version":    instance.TelemetryData.Version,
+				"os":         instance.TelemetryData.Os,
+				"deployment": instance.TelemetryData.Deployment,
+			}
+			s.volumeServerCount.Delete(labels)
+			s.totalDiskBytes.Delete(labels)
+			s.totalVolumeCount.Delete(labels)
+			s.filerCount.Delete(labels)
+			s.brokerCount.Delete(labels)
+		}
+	}
+
+	s.updateStats()
+}

telemetry/test/integration.go

@@ -0,0 +1,315 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/telemetry/proto"
+	"github.com/seaweedfs/seaweedfs/weed/telemetry"
+	protobuf "google.golang.org/protobuf/proto"
+)
+
+const (
+	serverPort = "18080" // Use different port to avoid conflicts
+	serverURL  = "http://localhost:" + serverPort
+)
+
+func main() {
+	fmt.Println("🧪 Starting SeaweedFS Telemetry Integration Test")
+
+	// Start telemetry server
+	fmt.Println("📡 Starting telemetry server...")
+	serverCmd, err := startTelemetryServer()
+	if err != nil {
+		log.Fatalf("❌ Failed to start telemetry server: %v", err)
+	}
+	defer stopServer(serverCmd)
+
+	// Wait for server to start
+	if !waitForServer(serverURL+"/health", 15*time.Second) {
+		log.Fatal("❌ Telemetry server failed to start")
+	}
+	fmt.Println("✅ Telemetry server started successfully")
+
+	// Test protobuf marshaling first
+	fmt.Println("🔧 Testing protobuf marshaling...")
+	if err := testProtobufMarshaling(); err != nil {
+		log.Fatalf("❌ Protobuf marshaling test failed: %v", err)
+	}
+	fmt.Println("✅ Protobuf marshaling test passed")
+
+	// Test protobuf client
+	fmt.Println("🔄 Testing protobuf telemetry client...")
+	if err := testTelemetryClient(); err != nil {
+		log.Fatalf("❌ Telemetry client test failed: %v", err)
+	}
+	fmt.Println("✅ Telemetry client test passed")
+
+	// Test server metrics endpoint
+	fmt.Println("📊 Testing Prometheus metrics endpoint...")
+	if err := testMetricsEndpoint(); err != nil {
+		log.Fatalf("❌ Metrics endpoint test failed: %v", err)
+	}
+	fmt.Println("✅ Metrics endpoint test passed")
+
+	// Test stats API
+	fmt.Println("📈 Testing stats API...")
+	if err := testStatsAPI(); err != nil {
+		log.Fatalf("❌ Stats API test failed: %v", err)
+	}
+	fmt.Println("✅ Stats API test passed")
+
+	// Test instances API
+	fmt.Println("📋 Testing instances API...")
+	if err := testInstancesAPI(); err != nil {
+		log.Fatalf("❌ Instances API test failed: %v", err)
+	}
+	fmt.Println("✅ Instances API test passed")
+
+	fmt.Println("🎉 All telemetry integration tests passed!")
+}
+
+func startTelemetryServer() (*exec.Cmd, error) {
+	// Get the directory where this test is running
+	testDir, err := os.Getwd()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get working directory: %v", err)
+	}
+
+	// Navigate to the server directory (from main seaweedfs directory)
+	serverDir := filepath.Join(testDir, "telemetry", "server")
+
+	cmd := exec.Command("go", "run", ".",
+		"-port="+serverPort,
+		"-dashboard=false",
+		"-cleanup=1m",
+		"-max-age=1h")
+
+	cmd.Dir = serverDir
+
+	// Create log files for server output
+	logFile, err := os.Create("telemetry-server-test.log")
+	if err != nil {
+		return nil, fmt.Errorf("failed to create log file: %v", err)
+	}
+
+	cmd.Stdout = logFile
+	cmd.Stderr = logFile
+
+	if err := cmd.Start(); err != nil {
+		return nil, fmt.Errorf("failed to start server: %v", err)
+	}
+
+	return cmd, nil
+}
+
+func stopServer(cmd *exec.Cmd) {
+	if cmd != nil && cmd.Process != nil {
+		cmd.Process.Signal(syscall.SIGTERM)
+		cmd.Wait()
+
+		// Clean up log file
+		os.Remove("telemetry-server-test.log")
+	}
+}
+
+func waitForServer(url string, timeout time.Duration) bool {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	fmt.Printf("⏳ Waiting for server at %s...\n", url)
+
+	for {
+		select {
+		case <-ctx.Done():
+			return false
+		default:
+			resp, err := http.Get(url)
+			if err == nil {
+				resp.Body.Close()
+				if resp.StatusCode == http.StatusOK {
+					return true
+				}
+			}
+			time.Sleep(500 * time.Millisecond)
+		}
+	}
+}
+
+func testProtobufMarshaling() error {
+	// Test protobuf marshaling/unmarshaling
+	testData := &proto.TelemetryData{
+		ClusterId:         "test-cluster-12345",
+		Version:           "test-3.45",
+		Os:                "linux/amd64",
+		Features:          []string{"filer", "s3api"},
+		Deployment:        "test",
+		VolumeServerCount: 2,
+		TotalDiskBytes:    1000000,
+		TotalVolumeCount:  10,
+		FilerCount:        1,
+		BrokerCount:       1,
+		Timestamp:         time.Now().Unix(),
+	}
+
+	// Marshal
+	data, err := protobuf.Marshal(testData)
+	if err != nil {
+		return fmt.Errorf("failed to marshal protobuf: %v", err)
+	}
+
+	fmt.Printf("   Protobuf size: %d bytes\n", len(data))
+
+	// Unmarshal
+	testData2 := &proto.TelemetryData{}
+	if err := protobuf.Unmarshal(data, testData2); err != nil {
+		return fmt.Errorf("failed to unmarshal protobuf: %v", err)
+	}
+
+	// Verify data
+	if testData2.ClusterId != testData.ClusterId {
+		return fmt.Errorf("protobuf data mismatch: expected %s, got %s",
+			testData.ClusterId, testData2.ClusterId)
+	}
+
+	if testData2.VolumeServerCount != testData.VolumeServerCount {
+		return fmt.Errorf("volume server count mismatch: expected %d, got %d",
+			testData.VolumeServerCount, testData2.VolumeServerCount)
+	}
+
+	return nil
+}
+
+func testTelemetryClient() error {
+	// Create telemetry client
+	client := telemetry.NewClient(serverURL+"/api/collect", true)
+
+	// Create test data using protobuf format
+	testData := &proto.TelemetryData{
+		Version:           "test-3.45",
+		Os:                "linux/amd64",
+		Features:          []string{"filer", "s3api", "mq"},
+		Deployment:        "integration-test",
+		VolumeServerCount: 3,
+		TotalDiskBytes:    1073741824, // 1GB
+		TotalVolumeCount:  50,
+		FilerCount:        2,
+		BrokerCount:       1,
+		Timestamp:         time.Now().Unix(),
+	}
+
+	// Send telemetry data
+	if err := client.SendTelemetry(testData); err != nil {
+		return fmt.Errorf("failed to send telemetry: %v", err)
+	}
+
+	fmt.Printf("   Sent telemetry for cluster: %s\n", client.GetInstanceID())
+
+	// Wait a bit for processing
+	time.Sleep(2 * time.Second)
+
+	return nil
+}
+
+func testMetricsEndpoint() error {
+	resp, err := http.Get(serverURL + "/metrics")
+	if err != nil {
+		return fmt.Errorf("failed to get metrics: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("metrics endpoint returned status %d", resp.StatusCode)
+	}
+
+	// Read response and check for expected metrics
+	content, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to read metrics response: %v", err)
+	}
+
+	contentStr := string(content)
+	expectedMetrics := []string{
+		"seaweedfs_telemetry_total_clusters",
+		"seaweedfs_telemetry_active_clusters",
+		"seaweedfs_telemetry_reports_received_total",
+		"seaweedfs_telemetry_volume_servers",
+		"seaweedfs_telemetry_disk_bytes",
+		"seaweedfs_telemetry_volume_count",
+		"seaweedfs_telemetry_filer_count",
+		"seaweedfs_telemetry_broker_count",
+	}
+
+	for _, metric := range expectedMetrics {
+		if !strings.Contains(contentStr, metric) {
+			return fmt.Errorf("missing expected metric: %s", metric)
+		}
+	}
+
+	// Check that we have at least one report received
+	if !strings.Contains(contentStr, "seaweedfs_telemetry_reports_received_total 1") {
+		fmt.Printf("   Warning: Expected at least 1 report received, metrics content:\n%s\n", contentStr)
+	}
+
+	fmt.Printf("   Found %d expected metrics\n", len(expectedMetrics))
+
+	return nil
+}
+
+func testStatsAPI() error {
+	resp, err := http.Get(serverURL + "/api/stats")
+	if err != nil {
+		return fmt.Errorf("failed to get stats: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("stats API returned status %d", resp.StatusCode)
+	}
+
+	// Read and verify JSON response
+	content, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to read stats response: %v", err)
+	}
+
+	contentStr := string(content)
+	if !strings.Contains(contentStr, "total_instances") {
+		return fmt.Errorf("stats response missing total_instances field")
+	}
+
+	fmt.Printf("   Stats response: %s\n", contentStr)
+
+	return nil
+}
+
+func testInstancesAPI() error {
+	resp, err := http.Get(serverURL + "/api/instances?limit=10")
+	if err != nil {
+		return fmt.Errorf("failed to get instances: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("instances API returned status %d", resp.StatusCode)
+	}
+
+	// Read response
+	content, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to read instances response: %v", err)
+	}
+
+	fmt.Printf("   Instances response length: %d bytes\n", len(content))
+
+	return nil
+}

weed/command/master.go

@@ -61,6 +61,8 @@ type MasterOptions struct {
 	electionTimeout    *time.Duration
 	raftHashicorp      *bool
 	raftBootstrap      *bool
+	telemetryUrl       *string
+	telemetryEnabled   *bool
 }
 
 func init() {
@@ -88,6 +90,8 @@ func init() {
 	m.electionTimeout = cmdMaster.Flag.Duration("electionTimeout", 10*time.Second, "election timeout of master servers")
 	m.raftHashicorp = cmdMaster.Flag.Bool("raftHashicorp", false, "use hashicorp raft")
 	m.raftBootstrap = cmdMaster.Flag.Bool("raftBootstrap", false, "Whether to bootstrap the Raft cluster")
+	m.telemetryUrl = cmdMaster.Flag.String("telemetry.url", "https://telemetry.seaweedfs.com:3091/api/collect", "telemetry server URL to send usage statistics")
+	m.telemetryEnabled = cmdMaster.Flag.Bool("telemetry", false, "enable telemetry reporting")
 }
 
 var cmdMaster = &Command{
@@ -332,5 +336,7 @@ func (m *MasterOptions) toMasterOption(whiteList []string) *weed_server.MasterOp
 		DisableHttp:             *m.disableHttp,
 		MetricsAddress:          *m.metricsAddress,
 		MetricsIntervalSec:      *m.metricsIntervalSec,
+		TelemetryUrl:            *m.telemetryUrl,
+		TelemetryEnabled:        *m.telemetryEnabled,
 	}
 }

weed/command/server.go

@@ -104,6 +104,8 @@ func init() {
 	masterOptions.raftBootstrap = cmdServer.Flag.Bool("master.raftBootstrap", false, "Whether to bootstrap the Raft cluster")
 	masterOptions.heartbeatInterval = cmdServer.Flag.Duration("master.heartbeatInterval", 300*time.Millisecond, "heartbeat interval of master servers, and will be randomly multiplied by [1, 1.25)")
 	masterOptions.electionTimeout = cmdServer.Flag.Duration("master.electionTimeout", 10*time.Second, "election timeout of master servers")
+	masterOptions.telemetryUrl = cmdServer.Flag.String("master.telemetry.url", "https://telemetry.seaweedfs.com:3091/api/collect", "telemetry server URL to send usage statistics")
+	masterOptions.telemetryEnabled = cmdServer.Flag.Bool("master.telemetry", false, "enable telemetry reporting")
 
 	filerOptions.filerGroup = cmdServer.Flag.String("filer.filerGroup", "", "share metadata with other filers in the same filerGroup")
 	filerOptions.collection = cmdServer.Flag.String("filer.collection", "", "all data will be stored in this collection")

weed/server/master_server.go

@@ -8,11 +8,13 @@ import (
 	"net/url"
 	"os"
 	"regexp"
+	"runtime"
 	"strings"
 	"sync"
 	"time"
 
 	"github.com/seaweedfs/seaweedfs/weed/stats"
+	"github.com/seaweedfs/seaweedfs/weed/telemetry"
 
 	"github.com/seaweedfs/seaweedfs/weed/cluster"
 	"github.com/seaweedfs/seaweedfs/weed/pb"
@@ -30,6 +32,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/topology"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 	util_http "github.com/seaweedfs/seaweedfs/weed/util/http"
+	"github.com/seaweedfs/seaweedfs/weed/util/version"
 	"github.com/seaweedfs/seaweedfs/weed/wdclient"
 )
 
@@ -52,6 +55,8 @@ type MasterOption struct {
 	MetricsAddress          string
 	MetricsIntervalSec      int
 	IsFollower              bool
+	TelemetryUrl            string
+	TelemetryEnabled        bool
 }
 
 type MasterServer struct {
@@ -76,6 +81,9 @@ type MasterServer struct {
 	adminLocks *AdminLocks
 
 	Cluster *cluster.Cluster
+
+	// telemetry
+	telemetryCollector *telemetry.Collector
 }
 
 func NewMasterServer(r *mux.Router, option *MasterOption, peers map[string]pb.ServerAddress) *MasterServer {
@@ -131,6 +139,28 @@ func NewMasterServer(r *mux.Router, option *MasterOption, peers map[string]pb.Se
 	ms.vg = topology.NewDefaultVolumeGrowth()
 	glog.V(0).Infoln("Volume Size Limit is", ms.option.VolumeSizeLimitMB, "MB")
 
+	// Initialize telemetry after topology is created
+	if option.TelemetryEnabled && option.TelemetryUrl != "" {
+		telemetryClient := telemetry.NewClient(option.TelemetryUrl, option.TelemetryEnabled)
+		ms.telemetryCollector = telemetry.NewCollector(telemetryClient, ms.Topo, ms.Cluster)
+		ms.telemetryCollector.SetMasterServer(ms)
+
+		// Set version and OS information
+		ms.telemetryCollector.SetVersion(version.VERSION_NUMBER)
+		ms.telemetryCollector.SetOS(runtime.GOOS + "/" + runtime.GOARCH)
+
+		// Determine features and deployment type
+		features := []string{"master"}
+		if len(peers) > 1 {
+			features = append(features, "cluster")
+		}
+		ms.telemetryCollector.SetFeatures(features)
+		ms.telemetryCollector.SetDeployment(telemetry.DetermineDeployment(true, false, len(peers)))
+
+		// Start periodic telemetry collection (every 24 hours)
+		ms.telemetryCollector.StartPeriodicCollection(24 * time.Hour)
+	}
+
 	ms.guard = security.NewGuard(append(ms.option.WhiteList, whiteList...), signingKey, expiresAfterSec, readSigningKey, readExpiresAfterSec)
 
 	handleStaticResources2(r)

weed/telemetry/client.go

@@ -0,0 +1,100 @@
+package telemetry
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/seaweedfs/seaweedfs/telemetry/proto"
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	protobuf "google.golang.org/protobuf/proto"
+)
+
+type Client struct {
+	url        string
+	enabled    bool
+	instanceID string
+	httpClient *http.Client
+}
+
+// NewClient creates a new telemetry client
+func NewClient(url string, enabled bool) *Client {
+	return &Client{
+		url:        url,
+		enabled:    enabled,
+		instanceID: uuid.New().String(), // Generate UUID in memory only
+		httpClient: &http.Client{
+			Timeout: 10 * time.Second,
+		},
+	}
+}
+
+// IsEnabled returns whether telemetry is enabled
+func (c *Client) IsEnabled() bool {
+	return c.enabled && c.url != ""
+}
+
+// SendTelemetry sends telemetry data synchronously using protobuf format
+func (c *Client) SendTelemetry(data *proto.TelemetryData) error {
+	if !c.IsEnabled() {
+		return nil
+	}
+
+	// Set the cluster ID
+	data.ClusterId = c.instanceID
+
+	return c.sendProtobuf(data)
+}
+
+// SendTelemetryAsync sends telemetry data asynchronously
+func (c *Client) SendTelemetryAsync(data *proto.TelemetryData) {
+	if !c.IsEnabled() {
+		return
+	}
+
+	go func() {
+		if err := c.SendTelemetry(data); err != nil {
+			glog.V(1).Infof("Failed to send telemetry: %v", err)
+		}
+	}()
+}
+
+// sendProtobuf sends data using protobuf format
+func (c *Client) sendProtobuf(data *proto.TelemetryData) error {
+	req := &proto.TelemetryRequest{
+		Data: data,
+	}
+
+	body, err := protobuf.Marshal(req)
+	if err != nil {
+		return fmt.Errorf("failed to marshal protobuf: %v", err)
+	}
+
+	httpReq, err := http.NewRequest("POST", c.url, bytes.NewBuffer(body))
+	if err != nil {
+		return fmt.Errorf("failed to create request: %v", err)
+	}
+
+	httpReq.Header.Set("Content-Type", "application/x-protobuf")
+	httpReq.Header.Set("User-Agent", fmt.Sprintf("SeaweedFS/%s", data.Version))
+
+	resp, err := c.httpClient.Do(httpReq)
+	if err != nil {
+		return fmt.Errorf("failed to send request: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("server returned status %d", resp.StatusCode)
+	}
+
+	glog.V(2).Infof("Telemetry sent successfully via protobuf")
+	return nil
+}
+
+// GetInstanceID returns the current instance ID
+func (c *Client) GetInstanceID() string {
+	return c.instanceID
+}

weed/telemetry/collector.go

@@ -0,0 +1,218 @@
+package telemetry
+
+import (
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/telemetry/proto"
+	"github.com/seaweedfs/seaweedfs/weed/cluster"
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	"github.com/seaweedfs/seaweedfs/weed/topology"
+)
+
+type Collector struct {
+	client       *Client
+	topo         *topology.Topology
+	cluster      *cluster.Cluster
+	masterServer interface{} // Will be set to *weed_server.MasterServer to access client tracking
+	features     []string
+	deployment   string
+	version      string
+	os           string
+}
+
+// NewCollector creates a new telemetry collector
+func NewCollector(client *Client, topo *topology.Topology, cluster *cluster.Cluster) *Collector {
+	return &Collector{
+		client:       client,
+		topo:         topo,
+		cluster:      cluster,
+		masterServer: nil,
+		features:     []string{},
+		deployment:   "unknown",
+		version:      "unknown",
+		os:           "unknown",
+	}
+}
+
+// SetFeatures sets the list of enabled features
+func (c *Collector) SetFeatures(features []string) {
+	c.features = features
+}
+
+// SetDeployment sets the deployment type (standalone, cluster, etc.)
+func (c *Collector) SetDeployment(deployment string) {
+	c.deployment = deployment
+}
+
+// SetVersion sets the SeaweedFS version
+func (c *Collector) SetVersion(version string) {
+	c.version = version
+}
+
+// SetOS sets the operating system information
+func (c *Collector) SetOS(os string) {
+	c.os = os
+}
+
+// SetMasterServer sets a reference to the master server for client tracking
+func (c *Collector) SetMasterServer(masterServer interface{}) {
+	c.masterServer = masterServer
+}
+
+// CollectAndSendAsync collects telemetry data and sends it asynchronously
+func (c *Collector) CollectAndSendAsync() {
+	if !c.client.IsEnabled() {
+		return
+	}
+
+	go func() {
+		data := c.collectData()
+		c.client.SendTelemetryAsync(data)
+	}()
+}
+
+// StartPeriodicCollection starts sending telemetry data periodically
+func (c *Collector) StartPeriodicCollection(interval time.Duration) {
+	if !c.client.IsEnabled() {
+		glog.V(1).Infof("Telemetry is disabled, skipping periodic collection")
+		return
+	}
+
+	glog.V(0).Infof("Starting telemetry collection every %v", interval)
+
+	// Send initial telemetry after a short delay
+	go func() {
+		time.Sleep(30 * time.Second) // Wait for cluster to stabilize
+		c.CollectAndSendAsync()
+	}()
+
+	// Start periodic collection
+	ticker := time.NewTicker(interval)
+	go func() {
+		defer ticker.Stop()
+		for range ticker.C {
+			c.CollectAndSendAsync()
+		}
+	}()
+}
+
+// collectData gathers telemetry data from the topology
+func (c *Collector) collectData() *proto.TelemetryData {
+	data := &proto.TelemetryData{
+		Version:    c.version,
+		Os:         c.os,
+		Features:   c.features,
+		Deployment: c.deployment,
+		Timestamp:  time.Now().Unix(),
+	}
+
+	if c.topo != nil {
+		// Collect volume server count
+		data.VolumeServerCount = int32(c.countVolumeServers())
+
+		// Collect total disk usage and volume count
+		diskBytes, volumeCount := c.collectVolumeStats()
+		data.TotalDiskBytes = diskBytes
+		data.TotalVolumeCount = int32(volumeCount)
+	}
+
+	if c.cluster != nil {
+		// Collect filer and broker counts
+		data.FilerCount = int32(c.countFilers())
+		data.BrokerCount = int32(c.countBrokers())
+	}
+
+	return data
+}
+
+// countVolumeServers counts the number of active volume servers
+func (c *Collector) countVolumeServers() int {
+	count := 0
+	for _, dcNode := range c.topo.Children() {
+		dc := dcNode.(*topology.DataCenter)
+		for _, rackNode := range dc.Children() {
+			rack := rackNode.(*topology.Rack)
+			for range rack.Children() {
+				count++
+			}
+		}
+	}
+	return count
+}
+
+// collectVolumeStats collects total disk usage and volume count
+func (c *Collector) collectVolumeStats() (uint64, int) {
+	var totalDiskBytes uint64
+	var totalVolumeCount int
+
+	for _, dcNode := range c.topo.Children() {
+		dc := dcNode.(*topology.DataCenter)
+		for _, rackNode := range dc.Children() {
+			rack := rackNode.(*topology.Rack)
+			for _, dnNode := range rack.Children() {
+				dn := dnNode.(*topology.DataNode)
+				volumes := dn.GetVolumes()
+				for _, volumeInfo := range volumes {
+					totalVolumeCount++
+					totalDiskBytes += volumeInfo.Size
+				}
+			}
+		}
+	}
+
+	return totalDiskBytes, totalVolumeCount
+}
+
+// countFilers counts the number of active filer servers across all groups
+func (c *Collector) countFilers() int {
+	// Count all filer-type nodes in the cluster
+	// This includes both pure filer servers and S3 servers (which register as filers)
+	count := 0
+	for _, groupName := range c.getAllFilerGroups() {
+		nodes := c.cluster.ListClusterNode(cluster.FilerGroupName(groupName), cluster.FilerType)
+		count += len(nodes)
+	}
+	return count
+}
+
+// countBrokers counts the number of active broker servers
+func (c *Collector) countBrokers() int {
+	// Count brokers across all broker groups
+	count := 0
+	for _, groupName := range c.getAllBrokerGroups() {
+		nodes := c.cluster.ListClusterNode(cluster.FilerGroupName(groupName), cluster.BrokerType)
+		count += len(nodes)
+	}
+	return count
+}
+
+// getAllFilerGroups returns all filer group names
+func (c *Collector) getAllFilerGroups() []string {
+	// For simplicity, we check the default group
+	// In a more sophisticated implementation, we could enumerate all groups
+	return []string{""}
+}
+
+// getAllBrokerGroups returns all broker group names
+func (c *Collector) getAllBrokerGroups() []string {
+	// For simplicity, we check the default group
+	// In a more sophisticated implementation, we could enumerate all groups
+	return []string{""}
+}
+
+// DetermineDeployment determines the deployment type based on configuration
+func DetermineDeployment(isMasterEnabled, isVolumeEnabled bool, peerCount int) string {
+	if isMasterEnabled && isVolumeEnabled {
+		if peerCount > 1 {
+			return "cluster"
+		}
+		return "standalone"
+	}
+	if isMasterEnabled {
+		return "master-only"
+	}
+	if isVolumeEnabled {
+		return "volume-only"
+	}
+	return "unknown"
+}