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This article introduces what are the differences between docker and containers, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Container technology has existed for a long time. Docker is a kind of container service and an open source application container engine.

The reason why the traditional container technology has not become the mainstream is that it fails to provide a standardized application runtime environment, while the new generation of container technology represented by Docker aims to provide a standardized runtime environment from the very beginning to achieve "build once, run anywhere" (once built, run everywhere).

The docker container can use the same build for any environment such as development, testing, pre-release, production, etc., and is decoupled from the underlying operating system. On this basis, CaaS (Container as a Service) technology is further developed.

It is indeed very appropriate to compare Docker to a container transport system in terms of code.

Docker packages any type of application and its dependencies into a standard, lightweight, portable, independent container, so that all kinds of applications support a standard mode of operation, as long as the server with Docker program can run.

The Docker container developed and tested by developers can run indiscriminately in the test environment and production environment, regardless of whether the server is a physical machine, a virtual machine, or a combination of the above servers. The application development process only needs to be executed once to ensure the consistency of the application running in any environment. For operators, you only need to configure servers in different environments once to run any Docker container.

When the number of containers and servers reaches a certain scale, it will encounter the problem of management, that is, how to effectively manage a large number of servers and containers to ensure the stable operation of applications, convenient upgrade and rapid resolution of failures.

Container orchestration tools provide a graphical interface or command line to manage containers and server clusters, provide container configuration, task publishing, service discovery, load balancing, system monitoring and fault recovery, declarative system configuration, and rules and constraint definition mechanisms for container deployment and performance.

Kubernetes, developed by Google, stands out from many orchestration tools. Compared with Kubernetes,Docker native orchestration tool Swarm, it is relatively simple to build and use clusters, and the cost of learning and deployment is relatively low. Newer versions of Docker have integrated Swarm. Swarm supports orchestration across multiple hosts, more than enough to manage smaller container clusters, and can be quickly deployed and run for beginners.

On the differences between docker and containers are shared here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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