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catalog/component/default/sonar-test-nest4/README.md
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---
title: "sonar-test-nest4"
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## Overview
`sonar-test-nest4` is a stateless microservice built using the `typescript-nestjs` runtime. It was scaffolded from the **Create Microservice** golden-path template on the Kyndryl Platform. The service provides a REST API for managing items, including CRUD operations, and is instrumented with OpenTelemetry for observability. It is designed to integrate seamlessly into the platform's CI/CD pipeline, leveraging Humanitec for deployment orchestration and Azure Container Registry for image storage.
`sonar-test-nest4` is a stateless microservice built using the `typescript-nestjs` runtime. It was scaffolded from the **Create Microservice** golden-path template on the Kyndryl Platform. The service provides a REST API for managing items, including endpoints for CRUD operations. It is designed to be lightweight, scalable, and observable, with integrated OpenTelemetry instrumentation and Prometheus metrics.
The service plays a critical role in the demo-apps domain, showcasing best practices for microservice development, deployment, and observability. It is managed by the platform engineering team and adheres to a strict branch promotion model to ensure quality and stability across environments.
This service plays a critical role in the demo-apps domain, serving as a testbed for platform capabilities such as CI/CD pipelines, observability, and load testing. It is managed via Humanitec and deployed to Azure Kubernetes Service (AKS) using Score-based configurations.
## Repository
| Field | Value |
|----------------|------------------------------------------------------------------------------------------------------------------------------------|
| Source Repo | [validate/sonar-test-nest4](https://gitea.kyndemo.live/validate/sonar-test-nest4) |
| Source Repo | [sonar-test-nest4](https://gitea.kyndemo.live/validate/sonar-test-nest4) |
| Branch | `dev` |
| ArgoCD App | — |
| Namespace | `dev` |
## Architecture
`sonar-test-nest4` follows a modern microservice architecture:
`sonar-test-nest4` follows a modern microservice architecture with the following components:
- **Runtime**: `typescript-nestjs`
- **Container Port**: `3000`
- **Endpoints**:
- `/api/items` for CRUD operations on items.
- `/health` for health checks.
- `/metrics` for Prometheus-compatible metrics.
- **Deployment Flow**:
- CI/CD pipelines in Gitea Actions handle build, test, and deployment.
- Images are pushed to Azure Container Registry (`bstagecjotdevacr`).
- Humanitec orchestrates deployments to AKS using Score files.
The service is designed for scalability and observability, with OpenTelemetry instrumentation and Prometheus metrics exposed at `/metrics`.
- `/api/items` for CRUD operations
- `/health` for health checks
- `/metrics` for Prometheus metrics
- **Deployment**:
- Images are built and pushed to Azure Container Registry (ACR).
- Humanitec API triggers deployments to AKS using Score-based configurations.
- **CI/CD**:
- Gitea Actions workflows (`build-push.yml` and `deploy-humanitec.yml`) automate build, test, and deployment processes.
- Promotion between environments (`dev → staging → prod`) is gated by CI checks and manual approvals.
## Configuration
| Config Key | Value |
|------------------|------------------|
|------------------|--------------------|
| `runtime` | `typescript-nestjs` |
| `health_path` | `/health` |
| `container_port` | `3000` |
Additional configuration details are managed via `.platform/config.yaml` and Humanitec Score files.
Additional configuration options are managed via `.platform/config.yaml` and Humanitec score files.
## Operations
### Deployment Steps
### Deployment Flow
1. Push changes to the `dev` branch for automatic deployment to the development environment.
2. Open a PR for promotion to `staging` or `prod`. Ensure CI tests pass and obtain one approval.
3. Merge PR to trigger deployment to the target environment.
1. Push changes to the `dev` branch to trigger automatic builds and deployments to the dev environment.
2. Promote changes to `staging` or `prod` via PRs, requiring CI checks and one approval.
3. Use Backstage's CI/CD tab to monitor and trigger promotions between environments.
### Runbook Notes
- **Health Check**: Verify service health at `/health`.
- **Metrics**: Monitor Prometheus metrics at `/metrics`.
- **Promotion Flow**:
- `dev → staging`: Requires CI gate and approval.
- `staging → prod`: Requires CI gate and approval.
- `prod → main`: Merge via PR after release.
- **Health Check**: Verify service health via `/health`.
- **Metrics**: Access Prometheus metrics at `/metrics`.
- **Load Testing**: K6 is enabled for load testing, with configurations stored in the `k6-test-sonar-test-nest4` ConfigMap.
## Observability
- **Grafana Dashboard**: [OpenTelemetry Application Observability](https://grafana.kyndemo.live/d/otel-app-observability-v2/opentelemetry-application-observability?orgId=1&var-app=sonar-test-nest4)
- **Prometheus Metrics**: Exposed at `/metrics`.
_Chaos Mesh and K6 load testing are enabled for this service._
- **Prometheus Metrics**: Exposed at `/metrics` on port `3000`.
## Dependencies

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