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This article is to share with you about the advantages of docker container, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

What are the advantages of docker containers? After many users feel the benefits of docker container and experience its powerful performance, they finally can't resist its charm. Container technology can solve many problems currently faced by the IT industry, and the advantages are also obvious.

Packaging performance will not change

The container packages the operating system, libraries, configuration files, paths and applications together, that is, when we do the QA test, what the whole image looks like, what it looks like when it is put into the production environment, and its performance will not be any different.

The container is very light.

The memory occupation of a single container is very small, unlike other processes which often occupy tens of thousands of MB of memory space, the container will only allocate memory to the main process, which can effectively reduce system overhead.

The container is faster

The startup time of a virtual machine is generally at the level of minutes, and the startup speed of the container can reach the level of seconds. Starting the container is as fast as starting the linux process.

The container can be destroyed.

In fact, containers are destroyable, which is the biggest difference between containers and virtual machines. The existence cycle of the container is very short, as long as the user has finished using it, the container can be destroyed immediately, saving space and resources.

In addition, in the actual use of container service, in order to maximize the advantages of the container, it is best to pay attention to the following things at run time.

1. Do not use the root user's role to run the process

The Docker container runs with root permissions by default. However, as the technology matures, docker will also provide a more secure default operation option. Under the existing technical conditions, running with root permissions will bring security risks to other applications, and in some operating environments, root permissions cannot be obtained, so when we run the container, we should use the USER command to specify users with non-root permissions.

two。 Do not run multiple processes in a single container

Containers are originally used to run a single application (such as http daemon, application server, database, etc.). If we have to run several applications in a container, it will be troublesome to manage each application process, access logs, and upgrade applications.

These are the advantages of docker containers, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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