Running Docker inside Docker lets you build images and start containers within an already containerized environment.

Enhancing the isolation of containerized microservices (root in the container maps to an unprivileged user on the host).

Note that, for the general use-case, Sysbox is expected to operate in a regular (non-containerized) environment (i.e., host installation).

As its name implies, Sysbox-In-Docker aims to provide a containerized environment where to execute the Sysbox runtime.