Let's understand what SRE adds, where it came from, why Google invented it, and how the two disciplines fit together without the buzzword fog.

The Linux kernel has eight types of namespaces. They are the foundation of process isolation, security boundaries, and multi-tenancy on Linux completely independent of Docker or any container tool. This article explains all eight, from first principles, with analogies a beginner

Everyone can drive a car. Almost nobody knows what's inside the engine. This article is the workshop manual from kernel namespaces down to the last union-mount nut and bolt.

Networking is the part of Docker most engineers treat as magic until something breaks at 2am and they have no mental model to debug with. This article builds that model from scratch: every driver, every primitive, every packet path all with diagrams.

Most CI pipelines build Docker images slowly, insecurely, and without reproducibility. This article covers every layer of getting it right.

Beyond docker-compose up. Health checks, dependency ordering, profiles, override files, secrets, and production-grade patterns, everything the docs gloss over.

Containers lie. Logs truncate. Processes vanish. Networks refuse to route. This is the field guide every tool, every signal, every technique for diagnosing what is actually wrong inside a running (or dead) container.

Every Docker image you have ever pulled is made of layers you cannot see, unified by a filesystem you have never consciously interacted with. OverlayFS is the invisible engine beneath every container and understanding it changes how you build, debug, and optimise images forever.

Docker's daemon-centric model was the right choice in 2013. In 2025, the industry has moved. Rootless containers, fork/exec runtimes, and Podman are not alternatives to Docker they are where container technology is going. Here is why, how, and what it means for your work.