Docker and Containers
Containers from first principles to production.
01Docker and Containers (1): Why Containers — The Problem VMs Didn't Solve
Containers solve the 'works on my machine' problem that VMs made expensive. Learn what containers actually are, how they …
02Docker and Containers (2): Images and Layers — What docker pull Actually Downloads
Docker images aren't monolithic files — they're stacks of read-only layers shared between containers. Understanding …
03Docker and Containers (3): Dockerfile Patterns — From Naive to Production
A Dockerfile defines how your image is built. The difference between a naive Dockerfile and an optimized one can be 10x …
04Docker and Containers (4): Networking and Volumes — How Containers Talk and Persist
Containers are ephemeral by default — they lose data when deleted and run in isolated networks. Volumes and networks are …
05Docker and Containers (5): Docker Compose — Multi-Container Applications
Real applications aren't single containers. Docker Compose lets you define multi-service architectures in a single YAML …
06Docker and Containers (6): Debugging and Logging — When Things Go Wrong Inside a Box
Containers hide their internals by design. When something breaks, you need specific tools and techniques to see inside …
07Docker and Containers (7): Security — Running Containers Without Giving Away the Keys
Containers provide isolation, not security. Default Docker configurations run processes as root with full capabilities. …
08Docker and Containers (8): Beyond Docker — Kubernetes, Swarm, and What Comes Next
Single-host Docker breaks down at scale. This article previews container orchestration — Docker Swarm for simplicity, …