A self-contained, single-binary OpenTelemetry Collector with built-in SQLite storage for traces and metrics, featuring a built-in web visualizer for exploring trace data, meant for small deployments and local development.

# Using Docker Compose (includes Grafana)
docker compose up -d

# SQLite DB is created at the repo root:
#   ./gotel.db

# Or build from source
go build -o gotel .
./gotel

The binary ships with an embedded default config (OTLP gRPC/HTTP → memory_limiter + batch → SQLite). Drop your own config at config.yaml or set GOTEL_CONFIG/OTEL_CONFIG_FILE to override.

The built-in query server provides endpoints for accessing trace data:

# Get trace by ID
curl http://localhost:3200/api/traces/{traceId}

# Search traces
curl http://localhost:3200/api/search?service=my-service

# List services
curl http://localhost:3200/api/services

# List all traces
curl http://localhost:3200/api/traces

# List spans
curl http://localhost:3200/api/spans

# List exceptions
curl http://localhost:3200/api/exceptions

# Storage statistics
curl http://localhost:3200/api/status

# Readiness check
curl http://localhost:3200/ready

Traces are converted to metrics stored in SQLite:

otel.traces.<service>.<operation>.span_count
otel.traces.<service>.<operation>.duration_ms
otel.traces.<service>.<operation>.error_count

• Configuration - Exporter options and setup
• Web UI - Using the built-in trace visualizer
• Sending Traces - Client examples (Go, Python, Node.js)
• Development - Building and extending
• Troubleshooting - Common issues

MIT