AMBARI-26544: Setting up docker images for Ambari for easy installation and testing

docker/README.md

@@ -0,0 +1,288 @@
+# Apache Ambari Docker Setup
+
+This directory contains Docker configurations for Apache Ambari, providing containerized environments for development, testing, and production deployment.
+
+## Quick Start
+
+### Prerequisites
+- Docker 20.10+ 
+- Docker Compose 2.0+
+- At least 8GB RAM available for Docker
+
+### Development Environment
+```bash
+# Clone and build Ambari
+git clone https://github.com/apache/ambari.git
+cd ambari
+
+# Start development environment
+docker-compose -f docker/docker-compose.dev.yml up -d
+
+# Access Ambari Web UI
+open http://localhost:8080
+# Default credentials: admin/admin
+```
+
+### Production Deployment
+```bash
+# Start production stack
+docker-compose -f docker/docker-compose.prod.yml up -d
+
+# Scale agents
+docker-compose -f docker/docker-compose.prod.yml up -d --scale ambari-agent=3
+```
+
+## Available Images
+
+### Base Images
+- `apache/ambari-base`: Common runtime dependencies
+- `apache/ambari-build`: Build environment with Maven, JDK, Node.js
+
+### Service Images  
+- `apache/ambari-server`: Ambari Server
+- `apache/ambari-agent`: Ambari Agent
+- `apache/ambari-metrics`: Metrics Collector with embedded HBase
+- `apache/ambari-dev`: Development environment
+
+### Supporting Images
+- `apache/ambari-database`: PostgreSQL with Ambari schema
+- `apache/ambari-grafana`: Grafana with Ambari Metrics datasource
+
+## Build Instructions
+
+### Build All Images
+```bash
+# Build all images
+./docker/build.sh
+
+# Build specific image
+./docker/build.sh ambari-server
+
+# Build with custom tag
+./docker/build.sh ambari-server --tag myregistry/ambari-server:latest
+```
+
+### Development Build
+```bash
+# Build development image with current source
+docker build -f docker/Dockerfile.dev -t ambari-dev .
+
+# Run development container
+docker run -it --rm \
+  -v $(pwd):/workspace \
+  -p 8080:8080 \
+  -p 8441:8441 \
+  ambari-dev
+```
+
+## Configuration
+
+### Environment Variables
+
+#### Ambari Server
+- `AMBARI_DB_HOST`: Database hostname (default: ambari-db)
+- `AMBARI_DB_PORT`: Database port (default: 5432)
+- `AMBARI_DB_NAME`: Database name (default: ambari)
+- `AMBARI_DB_USER`: Database user (default: ambari)
+- `AMBARI_DB_PASSWORD`: Database password (default: bigdata)
+- `AMBARI_SERVER_HTTPS`: Enable HTTPS (default: false)
+- `JAVA_OPTS`: JVM options
+
+#### Ambari Agent
+- `AMBARI_SERVER_HOST`: Ambari Server hostname (default: ambari-server)
+- `AMBARI_SERVER_PORT`: Ambari Server port (default: 8080)
+- `AGENT_HOSTNAME`: Agent hostname (auto-detected if not set)
+
+#### Ambari Metrics
+- `AMS_HBASE_ROOTDIR`: HBase root directory (default: /var/lib/ambari-metrics-collector/hbase)
+- `AMS_COLLECTOR_PORT`: Collector port (default: 6188)
+- `AMS_GRAFANA_ENABLED`: Enable Grafana (default: true)
+
+### Volume Mounts
+
+#### Persistent Data
+- `/var/lib/ambari-server`: Server data and configurations
+- `/var/lib/ambari-agent`: Agent data and logs
+- `/var/lib/ambari-metrics-collector`: Metrics data
+- `/var/log/ambari-*`: Log directories
+
+#### Development
+- `/workspace`: Source code mount point
+- `/root/.m2`: Maven repository cache
+
+## Docker Compose Configurations
+
+### Development (docker-compose.dev.yml)
+- Single-node setup with all services
+- Source code mounted for live development
+- Debug ports exposed
+- Automatic rebuilding enabled
+
+### Production (docker-compose.prod.yml)
+- Multi-container production setup
+- Separate database container
+- Health checks and restart policies
+- Resource limits configured
+
+### Testing (docker-compose.test.yml)
+- Automated testing environment
+- Includes test databases and mock services
+- CI/CD friendly configuration
+
+## Networking
+
+### Default Network
+- Network: `ambari-network` (bridge)
+- Subnet: `172.20.0.0/16`
+
+### Service Discovery
+Services are accessible by their container names:
+- `ambari-server`: Ambari Server
+- `ambari-db`: PostgreSQL Database  
+- `ambari-metrics`: Metrics Collector
+- `ambari-grafana`: Grafana Dashboard
+
+## Health Checks
+
+All services include health checks:
+- **Server**: HTTP check on `/api/v1/clusters`
+- **Agent**: Process and heartbeat check
+- **Metrics**: HTTP check on `/ws/v1/timeline/metrics`
+- **Database**: Connection check
+
+## Troubleshooting
+
+### Common Issues
+
+#### Container Won't Start
+```bash
+# Check logs
+docker-compose logs ambari-server
+
+# Check container status
+docker-compose ps
+
+# Restart specific service
+docker-compose restart ambari-server
+```
+
+#### Database Connection Issues
+```bash
+# Verify database is running
+docker-compose exec ambari-db pg_isready
+
+# Check database logs
+docker-compose logs ambari-db
+
+# Reset database
+docker-compose down -v
+docker-compose up -d ambari-db
+```
+
+#### Memory Issues
+```bash
+# Check resource usage
+docker stats
+
+# Increase memory limits in docker-compose.yml
+services:
+  ambari-server:
+    mem_limit: 4g
+```
+
+### Debug Mode
+
+#### Enable Debug Logging
+```bash
+# Set environment variable
+export AMBARI_DEBUG=true
+docker-compose up -d
+
+# Or in docker-compose.yml
+environment:
+  - AMBARI_DEBUG=true
+```
+
+#### Remote Debugging
+```bash
+# Server debug port: 5005
+# Agent debug port: 5006
+
+# Connect with IDE to localhost:5005
+```
+
+## Security Considerations
+
+### Production Deployment
+1. Change default passwords
+2. Use external database with proper credentials
+3. Enable HTTPS/TLS
+4. Configure firewall rules
+5. Use secrets management
+6. Regular security updates
+
+### Network Security
+```yaml
+# Example secure configuration
+services:
+  ambari-server:
+    environment:
+      - AMBARI_DB_PASSWORD_FILE=/run/secrets/db_password
+    secrets:
+      - db_password
+
+secrets:
+  db_password:
+    external: true
+```
+
+## Performance Tuning
+
+### Resource Allocation
+```yaml
+# Recommended production resources
+services:
+  ambari-server:
+    mem_limit: 4g
+    cpus: 2.0
+
+  ambari-metrics:
+    mem_limit: 2g
+    cpus: 1.0
+```
+
+### JVM Tuning
+```bash
+# Server JVM options
+JAVA_OPTS="-Xmx2g -Xms1g -XX:+UseG1GC"
+
+# Metrics JVM options  
+AMS_JAVA_OPTS="-Xmx1g -Xms512m"
+```
+
+## Contributing
+
+### Adding New Services
+1. Create Dockerfile in `docker/services/`
+2. Add to appropriate docker-compose file
+3. Update documentation
+4. Add health checks
+5. Test thoroughly
+
+### Testing Changes
+```bash
+# Run test suite
+./docker/test.sh
+
+# Specific test
+./docker/test.sh integration
+
+# Clean test environment
+./docker/test.sh clean
+```
+
+## Support
+
+- **Documentation**: [Apache Ambari Docs](https://ambari.apache.org/)
+- **Issues**: [GitHub Issues](https://github.com/apache/ambari/issues)
+- **Community**: [Apache Ambari Mailing Lists](https://ambari.apache.org/mail-lists.html)