Rust OpenTelemetry + Jaeger/Cloud Trace Sample

This project is a sample code that collects trace logs using OpenTelemetry in Rust and sends them to Jaeger or Google Cloud Trace. It sends trace data using the OTLP gRPC protocol.

Features

• Collection of traces using the OpenTelemetry SDK
• Sending trace data to Jaeger using the OTLP gRPC protocol
• Sending trace data to Google Cloud Trace
• Standard output logs in JSON format
• Integration of tracing and logging
• Exporter selection feature via environment variables

Prerequisites

• Rust (latest version recommended)
• Docker and Docker Compose (when running with Docker Compose)
• GCP project and authentication settings when using Google Cloud Trace

Execution Methods

Method 1: Send to Jaeger in a Local Environment

1. Start Jaeger locally:

   docker compose up -d

2. Build and run the application:

   OTEL_EXPORTER=jaeger JAEGER_ENDPOINT=http://localhost:4317 RUST_LOG=info cargo run

3. Access the Jaeger UI: http://localhost:16686

Method 2: Send to Google Cloud Trace

1. GCP authentication settings:

   # Set up ADC using gcloud
   gcloud auth application-default login

2. Run the application:

   OTEL_EXPORTER=cloud_trace GOOGLE_CLOUD_PROJECT=your-project-id cargo run

Environment Variables

• RUST_LOG: Control the log level (e.g., info, debug, warn)
• OTEL_EXPORTER: Specify the exporter to use (jaeger or cloud_trace, default: jaeger)
• JAEGER_ENDPOINT: Jaeger's OTLP endpoint (default: http://localhost:4317)
• GOOGLE_CLOUD_PROJECT: Google Cloud Project ID