Spring Boot Observability Setup

This project demonstrates a simple monitoring setup using:

• Spring Boot + Actuator
• Micrometer
• Prometheus (Docker)
• Grafana (Docker)

---

Architecture

Spring Boot
→ Micrometer
→ /actuator/prometheus
→ Prometheus
→ Grafana

---

Run Spring Boot

mvn spring-boot:run

Check metrics:

http://localhost:8080/actuator/prometheus

---

Run Prometheus

docker run -d -p 9090:9090 `
-v "FULL_PATH/prometheus.yml:/etc/prometheus/prometheus.yml" `
--name prometheus `
prom/prometheus

Check:

http://localhost:9090/targets

---

Run Grafana

docker run -d -p 3000:3000 `
-v grafana-storage:/var/lib/grafana `
--name grafana `
grafana/grafana

Open:

http://localhost:3000

Add Prometheus datasource:

http://host.docker.internal:9090

---

Example Queries

Request rate:

rate(http_server_requests_seconds_count[1m])

JVM memory:

jvm_memory_used_bytes