The blog post discusses the process of running CockroachDB in a FreeBSD jail, highlighting it as a lightweight and secure alternative to using Docker on FreeBSD. FreeBSD jails, which predate similar technologies like Linux cgroups, offer a straightforward and robust method for process isolation. The article provides a detailed guide on building CockroachDB from source on FreeBSD, given the absence of an official package, and covers the necessary prerequisites, such as the installation of various development tools and ensuring specific system configurations. It also describes the creation of a startup script to manage CockroachDB as a system daemon, emphasizing the need for customization to match the internal addressing of the jail. A step-by-step tutorial is provided for both seasoned jail users and beginners, including the installation of the ezjail package, the configuration of network interfaces, and the setup of the CockroachDB environment within the jail. The post invites contributions to enhance CockroachDB's portability and stresses that the solution has been tested on a specific FreeBSD version, with potential variations in future setups.