Date: Tue, 16 Jun 2020 09:46:52 -0700 (PDT) From: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> To: Andreas Nilsson <andrnils@gmail.com> Cc: Miguel C <miguelmclara@gmail.com>, "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: CTF: UEFI HTTP boot support Message-ID: <202006161646.05GGkqP7081794@gndrsh.dnsmgr.net> In-Reply-To: <CAPS9%2BSsvNOuV_F61y2YpL2B=tijg5TTtNMapPYZVnGiH8L5gDg@mail.gmail.com>
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> On Tue, Jun 16, 2020, 17:53 Miguel C <miguelmclara@gmail.com> wrote: > > > On Tue, Jun 16, 2020 at 4:35 PM Rodney W. Grimes < > > freebsd-rwg@gndrsh.dnsmgr.net> wrote: > > > > > > I've been trying out FreeBSD with raspberry Pi4 (4GB) and wanted to see > > > > what the state of HTTP BOOT is in FreeBSD, so I bumped into this! > > > > > > > > I'm curious if it should be possible to point to a img/iso directly (I > > > > tried to use the img.xz unpacked it and make it available on a local > > web > > > > server and that didn't seem to work for me) but maybe thats cause > > those > > > > images miss something, so arm64 aside does that work for amd64? I.E. > > > using > > > > the bootonly.iso? > > > > > > One problem you run into in attemtping this is even if you get an > > > image downloaded and started that image is being provided by some > > > memory device driver that emulates some type of iso device. > > > FreeBSD does not have a driver for that device so once the kernel > > > gets to the point of mounting its root file system it falls on > > > its face with a mountroot failure. > > > > > > > > > > > And on the other hand is there any doc on how to set up dhcp/http > > > specific > > > > to FreeBSD similar to > > https://en.opensuse.org/UEFI_HTTPBoot_Server_Setup > > > ? > > > > > > Since Linux uses this idea of a kernel payload and an initrd payload > > > to boot with it is much easier to get these 2 things over the network > > > and then have a workable system. FreeBSD does not have the initrd > > > payload and that complicates things, you need a functionaly filesystem > > > avaliable at the end of kernel initilization. > > > > > > > > I looked into > > https://www.freebsd.org/doc/handbook/network-diskless.html > > > > but that doesn't seem to be up to date (or at least it focuses only on > > > PXE > > > > and TFTP). > > > > > > Yes, old but workable. I have a more advanced system that supports NFS > > > booting using NFS support in PXE. The only thing done via tftp is to > > > upgrade the PXE running on the client to one that speaks NFS, then the > > > kernel is loaded via NFS and the root file system is later provided > > > via NFS. The use of NFS provides very fast boots, and I do not need > > > a web server to do it :-). > > > > > > > For clarification my ultimate goal is to use a few pi4's as "thin > > > clients", > > > > so eventually I will have to setup an image of the system with the > > needed > > > > software (freerdp) but for starters I just wanted to check if pointing > > > > directly to a img/iso would work and that does not seem to be the case. > > > > > > I would strongly suggest use of NFS instead of trying to provide an > > > ISO image, as you no longer need to store the ISO in memory on the > > > client box, and with a pi4 your already memory contrained. > > > > > > > Thanks for the tips, but I was really looking for HTTP BOOT info no NFS, > > that's why I replied to this thread. > > > > I might look into that at some point if HTTP BOOT is not an option of > > course, but this thread is about a Call for Testers for UEFI HTTP BOOT, not > > NFS and I would like to help test, the pi4 project just conveniently > > touches on the same use case (an it also does have support for http boot > > using https://rpi4-uefi.dev/) so I'm curious if I can test that way. > > > > Other than the iso I can ofc attempt the dhcp+dns+webserver setup but for > > that I would need a bit more guidance as the linked URL here is linux > > centric, hence why some docs would help. > > > > > > > > Am I just misremembering or can't you get freebsd to load an mfsroot-image, > which can act as rw fs ? Yes, but that is *not* an .iso as was asked above. > I seem to remember pc-bsd DVDs using this say 7 years ago. Yes. > > You would of course have to modify/build your own iso image with the > mfsroot-image on it. Perhaps, if you can get the mfsroot image into memory by the loader while you still have access to the bios code. > Best regards > Andreas -- Rod Grimes rgrimes@freebsd.org
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