Docker's architecture structure and working style

Docker is a containerization platform used to run software applications in separate environments. Docker's architecture is more efficient and is based on various components and layers. The structure and working principle of Docker's architecture are discussed below.

Structure of Docker's architecture

Docker Client:

• Description : Docker Client is the user interface that communicates with Docker Daemon. It accepts user commands and sends instructions to Docker Daemon accordingly.
• Functionality : The user dockercan create, delete, or manage containers using commands.

Docker Daemon:

• Description : Docker Daemon is a background service that manages Docker containers and images. It manages all Docker containers, deploys them, and keeps them running.
• Functionality :
  1 . Create, run, and delete containers.
  2 . Downloading images from Docker Registry and creating new images.

Docker Registry:

• Description : Docker Registry is a centralized place where Docker images are stored and distributed.
• Type :
  1.  Docker Hub : Docker's official public registry, where users can upload and download images.
  2 . Private Registry : Private registry for organizations where sensitive images are stored.

Docker Images:

• Description : Docker Images are the building blocks of containers. Each Docker image contains an application and all its dependencies.
• Functionality : Containers are created from images. Images are usually stored in layered file systems.

Docker Containers:

• Description : Docker Containers are functional units created from Docker Images. They run applications in an isolated environment.
• Functionality : Containers are lightweight and fast to run. They can run multiple containers simultaneously.

How Docker works

Container manufacturing process :

• docker runThe user issues a command (such as ) using the Docker Client .
  The Docker Client sends instructions to the Docker Daemon.

Docker Daemon starts working : 

• The Docker Daemon creates the container based on that instruction. It creates a new container from the corresponding Docker Image.

Running the container :

• The Docker Daemon launches the container and starts running the user's application.
• The container uses various resources while running, but works in isolation from other containers and the system.

Download image from Docker Registry :

• If the Docker Daemon does not have the required Docker Image, it downloads the image from the Docker Registry (such as Docker Hub).

Logs and Monitoring :

• The Docker Daemon collects log and monitoring information for running containers, which is useful for management.

Summary

Docker's architecture is primarily composed of Docker Client, Docker Daemon, Docker Registry, Docker Images, and Docker Containers. The Docker Client acts as the user interface, the Docker Daemon manages containers and images, and the Docker Registry stores and distributes images. All of these components work together to simplify and streamline the software development and deployment process. Using Docker, applications can be built, managed, and run quickly and efficiently.