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How is the Linux sub system/binary support for freeBSD these days? In theory this could be made to run Linux containers on the bsd kernel?

• moonchild 6y ago
  Linux containers make use of a kernel API which freebsd doesn't implement. However, you could run linux apps under a regular linux userspace inside of a freebsd jail.
  • e12e 6y ago
    Right, you couldn't run docker/dockerd, but you could run some docker images, probably? They're just filesystems with regular Linux binaries in them. Ed: for example, AFAIK there's no native build of Microsoft sql server for freeBSD, but there's a release for Linux, and a docker (oci) image: https://hub.docker.com/_/microsoft-mssql-server https://hub.docker.com/_/microsoft-mssql-server So, assuming runj could fetch from docker hub, and interpret the images, you might in theory just: runj run mcr.microsoft.com/mssql/server (I'm not sure about the status of init vs oci - I know docker defaults to/uses tini these days?).
  • ggm 6y ago
    FreeBSD implements a nice Linux compatibility shim. It might be worth asking if the cost to implement the kernel API needed for this, is too high, or can be GSoC or something.
• aduitsis 6y ago
  You can find instructions how to create Ubuntu Jails inside FreeBSD. There was an experimental Docker port for FreeBSD some years ago and it was actually working. I think it is mentioned here https://wiki.freebsd.org/Docker https://wiki.freebsd.org/Docker. However, it wasn't extremely useful as it didn't reach maturity, and because FreeBSD already had Jails. Which we were already using in production for the past ~15 years.