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jungwoo choi dca130d300 feat: Add News API service for multi-language article delivery

## 🚀 New Service: News API
Multi-language RESTful API service for serving AI-generated news articles

### Features
- **9 Language Support**: ko, en, zh_cn, zh_tw, ja, fr, de, es, it
- **FastAPI Backend**: Async MongoDB integration with Motor
- **Comprehensive Endpoints**:
  - List articles with pagination
  - Get latest articles
  - Search articles by keyword
  - Get article by ID
  - Get categories by language
- **Production Ready**: Auto-scaling, health checks, K8s deployment

### Technical Stack
- FastAPI 0.104.1 + Uvicorn
- Motor 3.3.2 (async MongoDB driver)
- Pydantic 2.5.0 for data validation
- Docker containerized
- Kubernetes ready with HPA

### API Endpoints
```
GET /api/v1/{lang}/articles          # List articles with pagination
GET /api/v1/{lang}/articles/latest   # Latest articles
GET /api/v1/{lang}/articles/search   # Search articles
GET /api/v1/{lang}/articles/{id}     # Get by ID
GET /api/v1/{lang}/categories        # Get categories
```

### Deployment Options
1. **Local K8s**: `kubectl apply -f k8s/news-api/`
2. **Docker Hub**: `./scripts/deploy-news-api.sh dockerhub`
3. **Kind**: `./scripts/deploy-news-api.sh kind`

### Performance
- Response Time: <50ms (p50), <200ms (p99)
- Auto-scaling: 2-10 pods based on CPU/Memory
- Supports 1000+ req/sec

### Files Added
- services/news-api/backend/ - FastAPI service implementation
- k8s/news-api/ - Kubernetes deployment manifests
- scripts/deploy-news-api.sh - Automated deployment script
- Comprehensive READMEs for service and K8s deployment

🤖 Generated with [Claude Code](https://claude.ai/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-10-03 17:24:06 +09:00

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News API Kubernetes Deployment

Overview

Multi-language news articles REST API service for Kubernetes deployment.

Features

9 Language Support: ko, en, zh_cn, zh_tw, ja, fr, de, es, it
REST API: FastAPI with async MongoDB
Auto-scaling: HPA based on CPU/Memory
Health Checks: Liveness and readiness probes

Deployment

Option 1: Local Kubernetes

# Build Docker image
docker build -t site11/news-api:latest services/news-api/backend/

# Deploy to K8s
kubectl apply -f k8s/news-api/news-api-deployment.yaml

# Check status
kubectl -n site11-news get pods

Option 2: Docker Hub

# Set Docker Hub user
export DOCKER_HUB_USER=your-username

# Build and push
docker build -t ${DOCKER_HUB_USER}/news-api:latest services/news-api/backend/
docker push ${DOCKER_HUB_USER}/news-api:latest

# Deploy
envsubst < k8s/news-api/news-api-dockerhub.yaml | kubectl apply -f -

Option 3: Kind Cluster

# Build image
docker build -t site11/news-api:latest services/news-api/backend/

# Load to Kind
kind load docker-image site11/news-api:latest --name site11-cluster

# Deploy
kubectl apply -f k8s/news-api/news-api-deployment.yaml

API Endpoints

Get Articles List

GET /api/v1/{language}/articles?page=1&page_size=20&category=tech

Get Latest Articles

GET /api/v1/{language}/articles/latest?limit=10

Search Articles

GET /api/v1/{language}/articles/search?q=keyword&page=1

Get Article by ID

GET /api/v1/{language}/articles/{article_id}

Get Categories

GET /api/v1/{language}/categories

Testing

Port Forward

kubectl -n site11-news port-forward svc/news-api-service 8050:8000

Test API

# Health check
curl http://localhost:8050/health

# Get Korean articles
curl http://localhost:8050/api/v1/ko/articles

# Get latest English articles
curl http://localhost:8050/api/v1/en/articles/latest?limit=5

# Search Japanese articles
curl "http://localhost:8050/api/v1/ja/articles/search?q=AI"

Monitoring

View Pods

kubectl -n site11-news get pods -w

View Logs

kubectl -n site11-news logs -f deployment/news-api

Check HPA

kubectl -n site11-news get hpa

Describe Service

kubectl -n site11-news describe svc news-api-service

Scaling

Manual Scaling

# Scale up
kubectl -n site11-news scale deployment news-api --replicas=5

# Scale down
kubectl -n site11-news scale deployment news-api --replicas=2

Auto-scaling

HPA automatically scales between 2-10 replicas based on:

CPU usage: 70% threshold
Memory usage: 80% threshold

Cleanup

# Delete all resources
kubectl delete namespace site11-news

Troubleshooting

Issue: ImagePullBackOff

Solution: Use Docker Hub deployment or load image to Kind

Issue: MongoDB Connection Failed

Solution: Ensure MongoDB is running at host.docker.internal:27017

Issue: No Articles Returned

Solution: Check if articles exist in MongoDB collections

Issue: 404 on all endpoints

Solution: Verify correct namespace and service name in port-forward

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