How Docker Desktop Networking Works Under the Hood

3 years ago www.docker.com

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Modern applications make extensive use of networks. At build time it’s common to apt-get/dnf/yum/apk install a package from a Linux distribution’s package repository.

Since Linux containers require a Linux kernel, Docker Desktop includes a helper Linux VM.

Since Docker Desktop runs Linux containers inside a Linux VM, there is a disconnect: the ports are open in the VM but the tools are running on the host.

When Docker Desktop is running Linux containers, the Docker engine (dockerd in the diagram above) is a Linux program running inside the helper Linux VM, not natively on the host.

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