A comprehensive microservices observability demo showcasing distributed tracing, metrics collection, and log aggregation using Spring Boot 3 and the Grafana observability stack.
This project demonstrates a microservices architecture with two services:
- Loan Service - Main service that processes loan applications
- Fraud Detection Service - Validates loan requests for fraud patterns
All services are instrumented with Spring Boot 3 Observability features and monitored through the Grafana stack.
- Spring Boot 3 - Microservices framework with native observability support
- Grafana - Visualization and dashboarding
- Prometheus - Metrics collection and storage
- Tempo - Distributed tracing backend
- Loki - Log aggregation system
- MySQL - Database for both services
- Micrometer - Application metrics instrumentation
- Java 17 or higher
- Maven 3.6+
- Docker & Docker Compose
docker compose up -dThis will start MySQL, Grafana, Prometheus, Tempo, and Loki.
cd loan-service
mvn spring-boot:runcd fraud-detection-service
mvn spring-boot:run| Service | URL | Description |
|---|---|---|
| Grafana | http://localhost:3000 | Dashboards and visualization |
| Prometheus | http://localhost:9090 | Metrics browser |
| Tempo | http://localhost:3110 | Trace queries |
| Loki | http://localhost:3100 | Log queries |
- ✅ Distributed tracing across microservices
- ✅ Metrics collection and visualization
- ✅ Centralized log aggregation
- ✅ Pre-configured Grafana dashboards
- ✅ Correlation between traces, metrics, and logs
- ✅ Service dependency mapping
.
├── loan-service/ # Main loan processing service
├── fraud-detection-service/ # Fraud validation service
├── docker/ # Configuration files for observability stack
│ ├── grafana/ # Grafana datasources and dashboards
│ ├── prometheus/ # Prometheus configuration
│ ├── tempo/ # Tempo configuration
│ └── mysql/ # Database initialization scripts
└── docker-compose.yml # Orchestration for all infrastructure
MIT