Can docker run on a virtual machine?

#Docker containers can run on virtual machines or physical machines. Strictly speaking, containers and virtual machines are not on the same level. They are a packaged collection of software environments.

Whether it is a virtual machine or a physical machine, it is a delivery method of hardware/infrastructure, which is essentially a level; and containers mainly solve a series of software-centered problems (development, testing, Deploy, publish, run).

Running containers in virtual machines has become a common practice. For example, AWS's container service only runs in virtual machines.

The Docker daemon can communicate directly with the main operating system to allocate resources to each Docker container; it can also isolate the container from the main operating system and isolate each container from each other. Docker is often used to isolate different applications, such as front-end, back-end, and database.

Virtual machines are better at completely isolating the entire operating environment. For example, cloud service providers usually use virtual machine technology to isolate different users. A virtual machine takes minutes to start, while a Docker container can start in milliseconds. Without a bloated operating system, Docker can save a lot of disk space and other system resources.

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