Containers are a virtualization alternative type that uses an isolated environment to run applications. The containers’ implementation is achieved by using an isolated space that contains all the necessary components, from system tools to libraries. These resources are usually called virtualized names. Interaction is supported with the container all components, but going beyond them is limited. In other words, the operating system allows only labelled components to be used.
Within containers, applications function without restrictions, since they are defined as the only one. To make changes to an existing file, or to create a new one, the container receives only new areas from the main host OS. This provides a key advantage in deploying multiple containers speed on a single host.
There is an important difference between a virtual machine (VM) technology and containers. Containers do not work with third-party system files and tools, while VMs use a separate resource pool from their OS. To work with the container, only resources are required, otherwise, the process is more similar to the components sharing by the operating system. This gives the container an advantage over VMs not only in startup speed but also in the system load degree, especially during startup.
Containers can be API or OS-specific. For example, Linux containers will not work without the Linux API, so they will be of little use for Windows.
To manage containers, you can use PowerShell (only allows you to work with a local repository), which is gradually losing popularity, or Docker. There is an agreement between Microsoft and Docker that all management commands are relevant for both Win containers and Linux.