hello-java

Spring Boot demo for the Java → Docker → Helm → Kubernetes lifecycle, instrumented with OpenTelemetry.

Hello from Java Spring Boot!

{
  "message": "Hello from Java Spring Boot!",
  "version": "1.6.0-0de4760"
}

Single sign-on demo

OpsAPI is the identity provider for this app and hello-php. Sign in once, with an OpsAPI password or with Google through OpsAPI, and every app that trusts OpsAPI knows who you are.

Login with OpsAPI here.
Open hello-php: you are signed in there without being asked again.
Sign out of OpsAPI everywhere to run the demo again.

Send a greeting

Each submission emits a log line, a metric and a trace span — visible in CloudWatch, Grafana and X-Ray.

Recent greetings

Loading…

Endpoints

GET /api/hello — the greeting JSON above
GET /api/greetings — greetings submitted through the form
GET /actuator/health — Actuator health, used by the Kubernetes probes
GET /actuator/prometheus — metrics scraped by Prometheus
GET /observability — telemetry console: service map, traces, metrics, logs

version 1.6.0-0de4760 · served by hello-java-dc967f8f8-vdjzt