The OpenBSD Webzine
webzine.puffy.cafe
webzine.puffy.cafe
Yesterday or the day before I used that machine to do web dev and some system administration stuff, and got more done faster than I usually do on my main machine.
That partially may be because it was just slower, and so I didn't have cycles to waste on HN or whatever else, but it was at least partially because it "just worked" for the stuff that I threw at it.
Can I run sandboxed rootless containers on OpenBSD?
It looks like Docker has some progress as well, via an alpine VM[2].
I may have misunderstood your question though, I haven't done much with containers.
[0] https://man.openbsd.org/unveil
[1] https://lwn.net/Articles/767137/
[2] https://medium.com/@dave_voutila/docker-on-openbsd-6-1-curre...
They're not a general replacement for Linux's namespaces, though. The only alternative on OpenBSD would be running the alternative environment in a VM, or running Linux in a VM and then using namespaces there.
FreeBSD comes closer with jails, but still doesn't match the ease of which you can use rootless namespaces to e.g. dump a tar file of a rootfs into a directory and "chroot" into it, all without root.
(the OpenBSD world will never implement this sort of thing by design, and it has merits, as user namespaces has created several privilege escalation vulnerabilities over the years, which is one reason some distros like RHEL/CentOS disable it on their kernels)