Jails for NetBSD provides container-like isolation and cgroup-style resource control, backed by kernel enforcement and minimal tooling for creation, supervision, and fleet management.

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A practical walkthrough of running container-like jails on NetBSD using jailmgr and jailctl. Covers bootstrapping the secmodel_jail kernel module, creating a jail with CPU, memory, file descriptor, and socket buffer limits, ephemeral provisioning, supervised process execution, and exposing Prometheus-compatible metrics via inetd. The approach achieves process isolation and resource enforcement using only base system components, with no container runtime, UID remapping, or full virtualization.