# Task 31: Deployment Preparation - COMPLETE ✅

## Summary

Task 31 (Deployment Preparation) has been successfully completed with all three subtasks and all encountered issues resolved.

## Completed Subtasks

### ✅ Task 31.1: Docker Configuration
- Created multi-stage Dockerfile for optimized builds
- Created docker-compose.yml with all required services
- Created .dockerignore for efficient builds
- Created .env.example template

### ✅ Task 31.2: Kubernetes Manifests
- Created complete Kubernetes deployment manifests in k8s/ directory
- Includes deployments for all services (app, postgres, redis, rabbitmq, keycloak)
- Configured HPA (Horizontal Pod Autoscaler) for application
- Created ingress configuration with TLS support
- Added resource limits and health probes

### ✅ Task 31.3: Deployment Documentation
- Created comprehensive DEPLOYMENT.md guide
- Created QUICKSTART.md for fast setup
- Created DEV-SETUP.md with detailed troubleshooting
- Updated README.md with deployment information

## Issues Encountered and Resolved

### Issue 1: Alpine Docker Images Not Available
**Error**: `failed to solve: maven:3.9-eclipse-temurin-17-alpine: failed to resolve`

**Solution**: Changed Dockerfile to use standard images instead of Alpine:
- Build: `maven:3.9-eclipse-temurin-17`
- Runtime: `eclipse-temurin:17-jre`

### Issue 2: Keycloak Database Missing
**Error**: `FATAL: database "keycloak" does not exist`

**Solution**: Created `scripts/init-databases.sh` to initialize both databases:
- `flight_platform` (application database)
- `keycloak` (authentication database)

### Issue 3: Keycloak Health Check Failing
**Error**: Container marked as unhealthy despite Keycloak running

**Solution**: Simplified health check in docker-compose.yml:
```yaml
healthcheck:
  test: ["CMD-SHELL", "exec 3<>/dev/tcp/127.0.0.1/8080"]
  interval: 10s
  timeout: 5s
  retries: 10
  start_period: 60s
```

### Issue 4: Application Logs Directory Missing
**Error**: `FileNotFoundException: logs/b2b-flight-platform.log`

**Solution**: Updated Dockerfile to create logs directory:
```dockerfile
RUN mkdir -p /app/logs && chown -R spring:spring /app/logs
```

### Issue 5: Missing system_configurations Table
**Error**: `Schema-validation: missing table [system_configurations]`

**Solution**: Created new migration file `V4__create_system_configurations_table.sql` with:
- Table creation
- Indexes
- Default configuration values

### Issue 6: Redis Connection Refused
**Error**: `Unable to connect to localhost/<unresolved>:6379`

**Solution**: Fixed environment variable naming in docker-compose.yml:
- Changed from: `SPRING_REDIS_HOST`
- Changed to: `SPRING_DATA_REDIS_HOST`

This is required for Spring Boot's property binding to work correctly with nested properties.

### Issue 7: App Health Check Using Wrong Command
**Error**: Health check failing because wget not available in container

**Solution**: Changed health check to use curl (which is available):
```yaml
healthcheck:
  test: ["CMD-SHELL", "curl -f http://localhost:8081/actuator/health || exit 1"]
```

## Final Status

All services are now running and healthy:

```
NAME                  STATUS
b2b-flight-app        Up (healthy) - Port 8081
b2b-flight-keycloak   Up (healthy) - Port 8080
b2b-flight-postgres   Up (healthy) - Port 5432
b2b-flight-rabbitmq   Up (healthy) - Ports 5672, 15672
b2b-flight-redis      Up (healthy) - Port 6379
```

### Health Check Results

```json
{
    "status": "UP",
    "components": {
        "amadeusApi": {"status": "UP"},
        "circuitBreakers": {"status": "UP"},
        "database": {"status": "UP"},
        "db": {"status": "UP"},
        "diskSpace": {"status": "UP"},
        "livenessState": {"status": "UP"},
        "ping": {"status": "UP"},
        "rabbit": {"status": "UP"},
        "readinessState": {"status": "UP"},
        "redis": {"status": "UP"}
    }
}
```

## Files Created/Modified

### Created Files:
1. `Dockerfile` - Multi-stage build configuration
2. `docker-compose.yml` - Local development orchestration
3. `.dockerignore` - Build optimization
4. `.env.example` - Environment variable template
5. `scripts/init-databases.sh` - Database initialization script
6. `k8s/*.yaml` - Complete Kubernetes manifests (9 files)
7. `k8s/README.md` - Kubernetes deployment guide
8. `docs/DEPLOYMENT.md` - Comprehensive deployment guide
9. `docs/DEV-SETUP.md` - Developer setup guide with troubleshooting
10. `QUICKSTART.md` - Fast setup guide
11. `src/main/resources/db/migration/V4__create_system_configurations_table.sql` - New migration

### Modified Files:
1. `README.md` - Added deployment information
2. `docs/DEV-SETUP.md` - Added all encountered issues and fixes

## Quick Start Commands

### Start All Services
```bash
docker-compose up -d
```

### Check Status
```bash
docker-compose ps
```

### View Logs
```bash
docker-compose logs -f app
```

### Stop Services
```bash
docker-compose down
```

### Clean Restart
```bash
docker-compose down -v
docker-compose up -d
```

## Access Points

- **Application API**: http://localhost:8081
- **Health Check**: http://localhost:8081/actuator/health
- **Swagger UI**: http://localhost:8081/swagger-ui.html (requires authentication)
- **Keycloak Admin**: http://localhost:8080 (admin/admin)
- **RabbitMQ Management**: http://localhost:15672 (flight_user/flight_pass)

## Next Steps

1. **Configure Keycloak**: Follow the guide in docs/DEPLOYMENT.md
2. **Set up Amadeus API**: Add credentials to .env file
3. **Generate Encryption Key**: Use EncryptionUtil.generateBase64Key()
4. **Explore API**: Use Swagger UI or Postman
5. **Production Deployment**: Follow k8s/README.md for Kubernetes deployment

## Documentation Links

- [Deployment Guide](docs/DEPLOYMENT.md) - Complete deployment instructions
- [Developer Setup](docs/DEV-SETUP.md) - Local development setup with troubleshooting
- [Quick Start](QUICKSTART.md) - Get started in minutes
- [Kubernetes Guide](k8s/README.md) - Production deployment on Kubernetes
- [API Documentation](docs/API_DOCUMENTATION.md) - API reference
- [Resilience Patterns](docs/RESILIENCE_PATTERNS.md) - Resilience implementation details

## Task Completion

✅ All subtasks completed
✅ All issues resolved
✅ All services running and healthy
✅ Comprehensive documentation created
✅ Ready for development and deployment

**Task 31 Status: COMPLETE**