Are FreeBSD Jails Containers? A Debate on Definitions
2025-04-08
This article explores the debate surrounding whether FreeBSD Jails are containers. Proponents argue Jails predate Docker and Podman, and are considered containers by FreeBSD developers like Allan Jude. They contend that limiting the definition of 'container' to Linux's Docker/Podman ecosystem ignores long-standing OS-level virtualization in BSD. Opponents argue Jails lack OCI container features like image abstraction and deployment models, and calling them containers misleads users and hinders FreeBSD adoption. The core issue is a divergence in understanding 'container': as a broad term for OS-level virtualization or specifically as technology adhering to OCI standards.
Development
Jails