Microservices workshop

• Develop
  • Spring Boot (order service)
  • NodeJS (inventory service)
• Working with Docker
• Observability
  • Distributed tracing
    • OpenTelemetry
    • Zipkin
  • Application metric
    • Prometheus
    • Grafana
• Testing
  • API testing with Postman

Step 1 :: Order service

• Java 17
• Spring Boot 3

Step to build and run service

$cd order
$./mvnw clean package
$./mvnw spring-boot:run
$cd ..

With Docker

$docker compose build order
$docker compose up -d order
$docker compose ps
$docker compose logs --follow

Access to API specification with Swagger v2

• http://localhost:8080/swagger-ui/index.html

Access to service

• GET http://localhost:8080/order/all
• POST http://localhost:8080/order

Create inventory service

$docker compose build inventory
$docker compose up -d inventory
$docker compose ps
$docker compose logs --follow

Access to service

• GET http://localhost:4000/healthz
• GET http://localhost:4000/stock/deduct/1

Observability

Distributed Tracing with Zipkin

$docker compose up -d zipkin
$docker compose ps
$docker compose logs --follow

Open Zipkin server in url=http://localhost:9411/

Application Metric with Actuator and Prometheus

• http://localhost:8080/actuator
• http://localhost:8080/actuator/health
• http://localhost:8080/actuator/prometheus

$docker compose up -d prometheus
$docker compose ps
$docker compose logs --follow

Open prometheus server

• http://localhost:9090
  • Go to menu Status => Targets

Dashboard with Grafana

• More dashboard

$docker compose up -d grafana
$docker compose ps
$docker compose logs --follow

Open Grafana server

• http://localhost:3000
  • user=admin
  • password=admin

Working with Grafana Platform

• Log aggregation with Loki
• Dashboard with Grafana

Log aggregation with Loki

$docker compose up -d loki
$docker compose ps
$docker compose logs --follow

Dashboard with Grafana

$docker compose up -d grafana
$docker compose ps
$docker compose logs --follow

Open prometheus server

• http://localhost:3000
  • user=admin
  • password=admin

API testing with Postman

• newman

$npm install -g newman

$cd testing/api-postman
$newman run order-service.postman_collection.json