Containerization

Containerization packages an application with all its dependencies (code, runtime, config) into a portable unit: the container image, ensuring consistent execution across any environment.

This technology is a game-changer: it virtualizes the OS kernel, not the entire operating system like a traditional VM, drastically cutting resource overhead. Tools like Docker create the container images, which are static blueprints; the container runtime executes them as isolated processes, sharing the host OS efficiently. This isolation guarantees application portability, eliminating 'works on my machine' issues. For orchestration at scale, Kubernetes manages these containers, providing automated deployment, scaling, and self-healing capabilities, ultimately delivering faster deployment cycles and significant cost reductions over legacy virtualization.

https://docs.docker.com/get-started/overview/