The images for these containers are created and work just the same way. In this configuration, the kernel of the container host isn't shared with the Hyper-V Containers, providing better isolation. Hyper-V Containers expand on the isolation provided by Windows Server Containers by running each container in a highly optimized virtual machine. A Windows Server Container shares a kernel with the container host and with all containers running on the host. Windows Server Containers provide application isolation through process and namespace isolation technology. To run Windows Containers, there are two types of runtimes: These products install the necessary VM (the Docker host) to host the containers. To host containers in development environments and provide additional developer tools, Docker ships Docker Desktop for Windows or for macOS. (Developers working on the Mac can edit code or run the Docker command-line interface (CLI) from macOS, but as of this writing, containers don't run directly on macOS.) Developers who work on Windows can create images for either Linux or Windows Containers. Developers who work on Linux or on the Mac, use a Docker host that's Linux-based, and they can only create images for Linux containers. On the development computer, the developer runs a Docker host where Docker images are deployed, including the app and its dependencies. However, Windows images can run only on Windows hosts and Linux images can run on Linux hosts and Windows hosts (using a Hyper-V Linux VM, so far), where host means a server or a VM.ĭevelopers can use development environments on Windows, Linux, or macOS. Docker image containers can also run natively on Linux and Windows. Docker deploys containers at all layers of the hybrid cloudĪs shown in the above diagram, Docker containers can run anywhere, on-premises in the customer datacenter, in an external service provider or in the cloud, on Azure. Docker is also a company that promotes and evolves this technology, working in collaboration with cloud, Linux, and Windows vendors, including Microsoft.įigure 1-2. Docker is an open-source project for automating the deployment of applications as portable, self-sufficient containers that can run on the cloud or on-premises.

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