Tools: Jails For Netbsd – Kernel Enforced Isolation And Native Resource...

Jails for NetBSD is an experimental prototype for lightweight, kernel-enforced isolation on NetBSD.

It closes the operational gap between simple chroot environments and full virtualization platforms such as Xen.

The project runs multiple workloads on a single host with:

The system stays fully NetBSD-native: isolation and policy enforcement are built into the kernel security framework, not delegated to a separate runtime layer.

The goal is not to replicate Linux-style container ecosystems, but to provide a focused operating model with minimal dependencies, no external control services, and explicit operational boundaries.

As with any kernel-based isolation, security depends on kernel correctness; stronger trust separation may still require virtualization such as Xen.

Earlier design discussions and experiments also considered per-jail hard resource partitioning, but that topic is currently out of scope for this prototype.

Overall, the project is a practical impulse for modern isolation capabilities that fit naturally into existing NetBSD administration workflows.

The implementation is built around the following components:

secmodel_jail Kernel security model responsible for jail identity, policy enforcement, and snapshot telemetry.

Source: HackerNews