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This article will explain in detail what is the underlying principle of docker operation. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Docker is a client-server-structured system in which the docker daemon runs on the host and is then accessed from the client through a socket connection. The daemon receives commands from the client and manages the container running on the host. A container is a runtime environment, which is what we call a container.

Why is docker faster than virtual machine vm?

1) docker has fewer abstraction layers than virtual machines. Because docker does not need hypervisor to virtualize the hardware resources, the programs running on the docker container directly use the hardware resources of the actual physical machine. Therefore, docker will have an obvious advantage in efficiency in terms of cpu and memory utilization.

2) docker uses the kernel of the host, but does not need guest os. So when building a container, docker does not need to reload the kernel of an operating system like a virtual machine. In order to avoid loading the operating system kernel to return a more time-consuming resource process, when creating a new virtual machine, the virtual machine software needs to load guest os, and the new process is minute-level. Because docker directly uses the host's operating system, the loading process is omitted, so it only takes a few seconds to create a new docker container.

Docke container virtual machine (vm) operating system shares with host os host os running virtual machine os storage size image is small, easy to store in transport image is large Vmdk, vdi and other operating systems have almost no performance losses. additional cpu, memory consumption, portability, flexibility, bulky for Linux, high hardware affinity coupled with virtual mechanization technology, for software developers, deployment speed for hardware operators, seconds and minutes, this article on "what is the underlying principle of docker operation" is shared here. I hope the above content can be helpful to you. So that you can learn more knowledge, if you think the article is good, please share it for more people to see.

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