distributed-tracing

# Distributed Tracing Implement distributed tracing with Jaeger and Tempo for request flow visibility across microservices. ## Purpose Track requests across distributed systems to understand latency, dependencies, and failure points. ## When to Use - Debug latency issues - Understand service dependencies - Identify bottlenecks - Trace error propagation - Analyze request paths ## Distributed Tracing Concepts ### Trace Structure ``` Trace (Request ID: abc123) ↓ Span (frontend) [100ms] ↓ Span (api-gateway) [80ms] ├→ Span (auth-service) [10ms] └→ Span (user-service) [60ms] └→ Span (database) [40ms] ``` ### Key Components - **Trace** - End-to-end request journey - **Span** - Single operation within a trace - **Context** - Metadata propagated between services - **Tags** - Key-value pairs for filtering - **Logs** - Timestamped events within a span ## Jaeger Setup ### Kubernetes Deployment ```bash # Deploy Jaeger Operator kubectl create namespace observability kubectl create -f https://github.com/jaegertracing/jaeger-operator/releases/download/v1.51.0/jaeger-operator.yaml -n observability # Deploy Jaeger instance kubectl apply -f - <<EOF apiVersion: jaegertracing.io/v1 kind: Jaeger metadata: name: jaeger namespace: observability spec: strategy: production storage: type: elasticsearch options: es: server-urls: http://elasticsearch:9200 ingress: enabled: true EOF ``` ### Docker Compose ```yaml version: "3.8" services: ...