Containerization
Quick Reference: Microservices | Why Microservices
Quick Reference
| Technology | Purpose | Use Case |
|---|---|---|
| Docker | Container runtime | Application packaging |
| Kubernetes | Orchestration | Container management |
| Docker Compose | Local development | Multi-container apps |
Clear Definition
Containerization packages applications with dependencies into isolated, portable containers. Orchestration (Kubernetes) manages container deployment, scaling, and operations.
š” Key Insight: Containers enable consistent deployments across environments. Kubernetes automates container management at scale.
Core Concepts
Docker
- Images: Read-only templates
- Containers: Running instances
- Dockerfile: Image definition
- Registry: Image storage (Docker Hub)
Kubernetes
- Pods: Smallest deployable unit
- Services: Network abstraction
- Deployments: Manage replicas
- Scaling: Horizontal pod autoscaling
Use Cases
- Microservices: Deploy services independently
- CI/CD: Consistent build/deploy
- Multi-cloud: Portability across clouds
- Development: Consistent environments
Best Practices
- Immutable Images: Don't modify running containers
- Health Checks: Liveness and readiness probes
- Resource Limits: CPU and memory limits
- Secrets Management: Secure configuration
Quick Reference Summary
Containers: Package apps with dependencies for portability.
Kubernetes: Orchestrate containers at scale.
Key: Enable consistent deployments and microservices architecture.
Previous Topic: Cascading Failures ā
Back to: Step 8 Overview | Main Index