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This article mainly introduces "what is the difference between docker container and virtual machine". In daily operation, I believe that many people have doubts about the difference between docker container and virtual machine. I have consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the question of "what is the difference between docker container and virtual machine"! Next, please follow the editor to study!

Introduction to virtual machines

The long-term use of virtualization technology has become a widely recognized way of server resource sharing, which can provide great flexibility for system administrators in the process of building operating system instances on demand.

But this is based on hypervisor virtualization technology. As a middleware, hypervisor acts as an intermediate software layer running between the server and the operating system. Its fundamental task is to allow multiple operating systems and applications to share a set of basic physical hardware (such as hard disk, memory, cpu, communication bus, etc.). It can coordinate computing tasks to access all physical devices and virtual machines on the server, so it is sometimes called virtual machine monitor.

Hypervisor is the core of all virtualization technologies, and the ability to support multi-work and multi-load migration without interruption is the basic function of Hypervisor. Whenever the server starts the process of executing Hypervisor, it allocates the right amount of memory, CPU, network, and disk to each virtual machine, and loads the guest operating system of all virtual machines.

However, there are still some performance and resource efficiency problems in hypervisor, which sometimes become a bottleneck and restriction in the face of large amount of computation. Therefore, the new virtualization technology based on container (Container) has become very hot since its birth.

Detailed description of docker Container

Docker belongs to a kind of encapsulation of Linux container, which provides a set of easy-to-use container interfaces. It is in fact the most popular Linux container scheme at present. Docker packages the application and the dependent computing environment in which it runs in an image file. As long as you run this image file, a virtual container will be generated. The program runs in this virtual container as if it were running on a real physical machine.

Using the advantages of Docker technology can help enterprises to expand their services rapidly, thus realizing the ability to deploy computing services flexibly. After the rise of the concept of cloud services, the use scenario and scope of Docker have been further developed. now the micro-service architecture has become popular again, and micro-services + Docker has once again become a perfect combination, with fast delivery, rapid deployment and one-stop deployment for simple operation and maintenance.

Docker is the world's leading software container platform. Developers use Docker to eliminate the problem of collaborative coding that "only works on my machine". For operation and maintenance personnel, Docker can be used to run and manage applications in parallel in an isolated container to obtain better computing density. Enterprises can use Docker to build agile software delivery methods to release new functions for Linux and Windows Server applications with high speed, high security and high reliability, and cross-platform barrier-free.

In addition, the interface of Docker is quite simple, and users can easily create and use containers and put their own applications into containers. The container interface can also be used for version management, copying, sharing, and modification, just like managing ordinary code, as long as you learn all the knowledge of docker.

At this point, the study on "what is the difference between docker containers and virtual machines" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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