What is containerization?

#Definition

Containerization is a way to package an application together with all its dependencies into an isolated container that can run on any system without manually configuring the environment.

#The point

The point is that the application lives in its own "micro-space," doesn't conflict with other programs, and behaves the same everywhere: on the developer's machine, on a test stand, and in production.

#Key traits of containerization

1. Environment isolation - each service has its own libraries, packages, and configs.
2. Repeatability - the same container can run on any machine.
3. Lightness - containers use the host OS kernel, so they are lighter and faster than virtual machines.
4. Convenient transfer and scaling - a container can be quickly deployed, copied, cloned, and run in quantities from 1 to hundreds.

#In short

In one phrase: containerization is a technology that lets applications run in standardized, isolated containers and guarantees the same behavior in any environment.