DOCKER

Why is Docker Popular?

• Lightweight & Fast: Uses containers instead of VMs, making deployments faster and more efficient.
• Portability: Ensures applications run the same way across different environments (development, testing, production).
• Microservices Friendly: Supports breaking applications into modular services that can be deployed and managed independently.
• Efficient Resource Usage: Shares OS kernel, reducing resource overhead.
• Large Community & Enterprise Adoption: Strong open-source community with enterprise solutions like Docker Enterprise and Kubernetes integration.

Docker Use Cases in DevOps Automation

• Application Containerization:
  • Encapsulates applications and dependencies in lightweight containers.
  • Example: Running Python, Java, or Node.js applications in containers.
• CI/CD Pipelines:
  • Speeds up build, test, and deployment by using Docker in CI/CD pipelines.
  • Example: Jenkins, GitHub Actions, GitLab CI/CD integration.
• Microservices Deployment:
  • Deploys microservices independently using containers.
  • Example: Running services in isolated environments with Docker Compose.
• Cloud & Hybrid Deployments:
  • Works with AWS, Azure, and GCP for cloud-based deployments.
  • Example: Deploying Docker containers to AWS ECS, EKS, or Azure Kubernetes Service.
• Security & Compliance:
  • Ensures security best practices in containerized environments.
  • Example: Scanning images for vulnerabilities before deployment.