Learn about docker

• The English interpretation of docker is docker;
• The idea of ​​docker comes from containers. Cloud computing is popular now. Cloud computing is like a large freighter. Docker is like a container on a freighter. It is a container for applications (programs, websites, system fees);
• Some people also say that docker is a standard;
• Different applications depend on different application environments, and there may be conflicts between application environments, requiring a long time to debug. The conventional method can create different virtual machines to isolate the environment, but the virtual machine is expensive. Docker can realize the isolation application environment function of virtual machine, and the overhead is smaller than it (saving money);
• The development environment is different from the production environment (such as ubuntu and centos), docker can directly encapsulate the development environment and transfer it to the production environment, and the production environment can directly deploy the docker you gave, and the speed is fast, refer to Zhihu ;
• Analogy to casserole wontons, see here
• I have read a lot of docker information, and the summary has been delayed for a long time. The reason is that I don't really understand docker, so I dare not write it; but I just read the information and don't practice it. If you don't use it, you will never really understand it. docker. At present, I have a conceptual understanding of it, and follow-up needs to be verified by practical operations, and finally distinguish whether it is a container, a standard, a casserole ravioli or other. When approaching other new concepts, it is strictly forbidden to repeat the same mistakes.