booting FAI without PXE, tftp using kexec

[Justin Cattle]

Hi Thomas,

That's very cool.  Thanks for sharing.
I guess you are copying the kernel and initrd over manually and putting
them in your current working dir ?


Cheers,
Just


On Tue, 5 Apr 2022 at 14:44, Thomas Lange <lange at cs.uni-koeln.de> wrote:

> Hi all,
>
> I just installed a machine in a different subnet where I could no use
> network booting using PXE.
>
> But on this machine linux was already running. This is how I managed
> to boot the FAI system and to start the installation.
>
> Load the FAI kernel and initrd from the nfsroot and add FAI specific boot
> parameters:
>
> # kexec -l vmlinuz-5.10.0-13-amd64 --initrd=initrd.img-5.10.0-13-amd64
> --append="FAI_FLAGS=sshd,verbose,createvt FAI_ACTION=install rootovl
> rd.neednet ip=dhcp root=1.2.3.4:/srv/fai/nfsroot,nfsvers=3
> FAI_CONFIG_SRC=nfs://faiserver/srv/fai/config"
>
> Then reboot the computer using kexec. This will shutdown the OS and
> boot the FAI kernel and initrd without going through the BIOS.
>
> # systemctl kexec
>
> --
> best regards Thomas
>

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