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+# petclinic
+
+Deployed from **custom** via the Backstage Hello Demo template.
+
+| Property | Value |
+|---|---|
+| **Environment** | `dev` |
+| **Namespace** | `demo-apps` |
+| **ArgoCD Project** | `default` |
+| **Branch** | `main` |
+| **Observability** | Enabled (OpenTelemetry) |
+
+## Quick Links
+
+- **Repository**: [https://gitea.kyndemo.live/validate/petclinic](https://gitea.kyndemo.live/validate/petclinic)
+- **ArgoCD**: [https://argocd.kyndemo.live/applications/petclinic](https://argocd.kyndemo.live/applications/petclinic)
+- **Live App**: [https://petclinic.kyndemo.live](https://petclinic.kyndemo.live)
+
+- **Grafana Dashboard**: [https://grafana.kyndemo.live/d/otel-app-observability-v2/...?var-app=petclinic](https://grafana.kyndemo.live/d/otel-app-observability-v2/opentelemetry-application-observability-testing?orgId=1&var-app=petclinic)
+
+
+## Architecture
+
+This service was scaffolded using the **hello-demo** Backstage template.
+
+**Deployment flow:**
+
+1. Source cloned from `custom`
+2. Catalog entity and CI workflows overlaid by Backstage
+
+3. The Watcher scanned the repository and injected OpenTelemetry auto-instrumentation via Kustomize overlay
+
+4. ArgoCD Application created targeting the `demo-apps` namespace
+5. ArgoCD continuously syncs from the `main` branch
+
+**ArgoCD sync path:** `overlays/otel`
+
+## Development Workflow
+
+```bash
+git clone https://gitea.kyndemo.live/validate/petclinic.git
+cd petclinic
+# make changes, then:
+git add . && git commit -m "your change" && git push origin main
+```
+
+ArgoCD monitors the repository and automatically syncs changes to the `demo-apps` namespace.
+
+## Rollback
+
+To roll back to a previous version:
+
+1. Open the [ArgoCD UI](https://argocd.kyndemo.live/applications/petclinic)
+2. Click **History and Rollback**
+3. Select the desired revision and click **Rollback**
+
+Alternatively, revert the commit in Git and push — ArgoCD will auto-sync the rollback.
+
+
+## Observability
+
+This service has OpenTelemetry auto-instrumentation enabled. Traces, metrics, and logs are exported to the OTel Collector and visualised in Grafana.
+
+**Viewing telemetry:**
+
+- Open the [Grafana Dashboard](https://grafana.kyndemo.live/d/otel-app-observability-v2/opentelemetry-application-observability-testing?orgId=1&var-app=petclinic)
+- Filter by `app=petclinic` to see service-specific data
+- Check the **Alerts** tab in Backstage for any firing Grafana alerts
+
+**OTel Collector endpoint:** `http://otel-collector.monitoring.svc.cluster.local:4318`
+
+
+## SLOs and Monitoring
+
+Define your service level objectives here once the service is stable:
+
+| SLI | Target | Dashboard |
+|---|---|---|
+| Availability | 99.9% | [Grafana](https://grafana.kyndemo.live) |
+| Latency (p99) | < 500ms | [Grafana](https://grafana.kyndemo.live) |
+| Error rate | < 1% | [Grafana](https://grafana.kyndemo.live) |