1. Docker architecture#

Docker uses a client-server architecture. The Docker client talks to the Docker daemon, which does the heavy lifting of building, running, and distributing your Docker containers. The Docker client and daemon can run on the same system, or you can connect a Docker client to a remote Docker daemon. The Docker client and daemon communicate using a REST API, over UNIX sockets or a network interface.

Learn more about the Cocker client(docker), Docker daemon(dockerd) and Docker objects (images, containers): https://docs.docker.com/get-started/overview/

2. Docker build architecture#

Docker Build implements a client-server architecture, where:

  • Buildx is the client and the user interface for running and managing builds
  • BuildKit is the server, or builder, that handles the build execution.

As of Docker Engine 23.0 and Docker Desktop 4.19, Buildx is the default build client.

In newer versions of Docker Desktop and Docker Engine, you’re using Buildx by default when you invoke the docker build command. In earlier versions, to build using Buildx you would use the docker buildx build command.

Sourcce: Docker Build architecture | Docker Docs

Learn more: Builders | Docker Docs