Shulou(Shulou.com)05/31 Report--

This article mainly introduces "what is the core concept of Docker". In daily operation, I believe many people have doubts about what the core concept of Docker is. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubt of "what is the core concept of Docker?" Next, please follow the editor to study!

4. What is Docker4.1. Authoritative interpretation

Docker is an open platform for building, shipping and running distributed applications. It gives programmers, development teams and operations engineers the common toolbox they need to take advantage of the distributed and networked nature of modern applications.

-docker.com

This is a description from Docker's official website, which has two meanings:

What can docker do?

It can be used to compile (building), distribute (shipping), and run (running) distributed applications.

Who uses docker?

Programmer (programmers), development team (development teams), operation and maintenance engineer (operations engineers).

4.2. To put it popularly...

This product is a simplified version of the VM virtual machine, which achieves minimal resource consumption, starts / stops very quickly at the expense of resource isolation, it can easily share / obtain public applications (images), and it is more convenient to build their own applications (images) through Dockfile.

Extended Reading: the difference between Docker and VM

5. Core concept

Before formally using Docker, let's outline a few core concepts.

Image (mirrored)

Similar to the familiar Windows image (ISO or installation CD), it can be understood as an application-specific Copy, which is read-only.

Container (container)

The image cannot be run directly and can only be used after installation. The container is the instance after running the image, and we can modify the instance.

Dockerfile

A metafile used to make an image, which is somewhat similar to Maven's pom.xml file, through which you can build an image.

Hub.docker.com

A place where image publishing is shared, similar to search.maven.org.

The relationship between them is as follows:

At this point, the study of "what is the core concept of Docker" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.