Container architecture

Now, let's discuss on a high level how a system that can run Docker containers is designed. The following diagram illustrates what a computer on which Docker has been installed looks like. By the way, a computer which has Docker installed is often called a Docker host, because it can run or host Docker containers:

High-level architecture diagram of the Docker engine

In the preceding diagram, we see three essential parts:

  • On the bottom, we have the Linux operating system
  • In the middle dark gray, we have the container runtime
  • On the top, we have the Docker engine

Containers are only possible due to the fact that the ...

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