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This article focuses on "what are the functions and disadvantages of the docker container". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "what are the functions and disadvantages of the docker container?"

Docker is a container virtualization tool developed by Docker Inc. (formerly known as DotCloud) and a "lightweight container type virtualization environment". How it works is that even if the container is moved to another OS, the application operation can be divided into containers and performed.

What is Docker?

At first, Docker was thanks to Web servers and various servers that support Internet communication. However, with the explosive growth of the world's websites and the increase in the number of machines, the location, cost and management of servers are huge. Therefore, building a mechanism that can be used as multiple servers on a single server is called virtualization. In addition to improving traditional virtualization, the IT version of Docker takes full account of the concept of containers.

The function of Docker

When using Docker, first talk about the features and advantages, the key to Docker is light, easy to store and reuse.

Advantages of using Docker

Startup processing is fast, intensive, and easy to move, because configuration is simpler than virtualization, it is less expensive than other virtualization technologies, and starting new machines (containers) is faster than virtual machines (VM).

Disadvantages of using Docker

As a container, it is not possible to operate a system different from the underlying OS, and it is not possible to mix two or more distributions, and because the kernel is shared by all containers, configuration changes on the kernel cannot be performed alone.

Different versions of the installation method are different, Docker can be used for a variety of Linux,Windows and Mac, of which, this time we will use CentOS 7 (64-bit version), and security is implemented as non-root users, not root users.

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