Docker for Developers

Docker telah revolutionize cara kita develop dan deploy applications. Berikut guide lengkap untuk developers.

What is Docker?

Docker adalah containerization platform yang memungkinkan Anda package applications dengan semua dependencies-nya.

Benefits

• Consistency: Same environment di development dan production
• Isolation: Each container runs independently
• Portability: Run anywhere yang support Docker
• Efficiency: Lightweight dibanding VMs

Getting Started

Installation

Download dan install Docker Desktop dari docker.com

Your First Container

docker run hello-world

Dockerfile Basics

Membuat Dockerfile untuk PHP application:

FROM php:8.2-fpm

WORKDIR /var/www

COPY . .

RUN composer install

EXPOSE 9000

CMD ["php-fpm"]

Docker Compose

Docker Compose untuk multi-container applications:

version: '3.8'

services:
  app:
    build: .
    ports:
      - "8000:8000"
    volumes:
      - .:/var/www
    depends_on:
      - db
      
  db:
    image: mysql:8.0
    environment:
      MYSQL_DATABASE: myapp
      MYSQL_ROOT_PASSWORD: secret
    volumes:
      - dbdata:/var/lib/mysql

volumes:
  dbdata:

Common Commands

# Build image
docker build -t myapp .

# Run container
docker run -p 8000:8000 myapp

# List containers
docker ps

# Stop container
docker stop <container-id>

# Remove container
docker rm <container-id>

Best Practices

1. Use .dockerignore: Exclude unnecessary files
2. Multi-stage builds: Optimize image size
3. Layer caching: Order instructions efficiently
4. Environment variables: For configuration
5. Health checks: Monitor container health

Conclusion

Docker simplifies development workflow dan ensures consistency across environments. Start containerizing your apps today!