Investigating guestagent on FreeBSD, for containerd with runj

[afbjorklund]

• https://samuel.karp.dev/blog/2021/05/running-freebsd-jails-with-containerd-1-5/

• https://productionwithscissors.run/2022/09/04/containerd-linux-on-freebsd/

There is no systemd on BSD, so it needs to use /var/run.

GNU bash is in /usr/local/bin/bash, default is /bin/csh.

Eventually it should use BSM Audit events, but empty here.
Using a simple sockstat call, instead of trying to get kernel events

Added "os"

# OS: "Linux", "FreeBSD".
# 🟢 Builtin default: "Linux"
os: null

Issue #1508

Related #1735

[afbjorklund]

I found some old code that I hadn't pushed, it needs to be rebased and cleaned up

[afbjorklund]

Note: there is no use case for FreeBSD yet, except for "it exists" and in order to test runj

[afbjorklund]

this u-boot image was mostly a hack to get past the validate (for amd64/arm64), but it is the real image:

https://wiki.freebsd.org/riscv/QEMU

We might want to import it to https://github.com/lima-vm/u-boot-qemu-mirror/ proper, so it can be used here.

The image does seem to be booting.

[AkihiroSuda]

Why can't we use Debian's u-boot binary for FreeBSD?

[afbjorklund]

I think that should be fine as well, just haven't tested it.

[afbjorklund]

The ZFS disk is actually only needed if wanting to run containers, it will boot fine without it.

[afbjorklund]

Note: the build configuration for guest agent defaults to FreeBSD disabled (only Linux enabled), so you want to make sure to enable this before building and installing...

CONFIG_GUESTAGENT_OS_FREEBSD=y

[AkihiroSuda]

Needs rebase.

Does cloud-init work with FreeBSD?
No change is needed for the cidata stuff?

[afbjorklund]

Does cloud-init work with FreeBSD?

I think it could work (in theory at least), but that it is not included by default in the ISO image.

It seems to be quite new: https://www.freebsd.org/status/report-2023-01-2023-03/cloud-init/

Previous PR was without any cidata.

• Support for FreeBSD guests ? #1508 (comment)