Container Fundamentals
Understand container architecture, image building, and runtime concepts.
Container architecture with images, runtime, and volumes
Containers provide lightweight, portable application packaging. Understanding container fundamentals is essential for modern application deployment.
Container concepts:
- Images & Layers - Immutable, layered filesystem snapshots
- Dockerfile Best Practices - Multi-stage builds, minimal base images
- Container Runtime - Docker, containerd, CRI-O
- Namespaces & Cgroups - Linux isolation mechanisms
Key Concepts
- Use official base images when possible
- Minimize image size for faster pulls
- Never run as root in containers
- Scan images for vulnerabilities
- Use .dockerignore to exclude files