fai-chboot patch proposal : Choose kernel from the corresponding nfsroot

[Prunk Dump]

Hello FAI team !

When using fai with multiple architectures we have multiple fai config
directories :

/etc/fai-amd64
/etc/fai-i386

When launching the fai-setup command with the -C option ( fai-setup -C
/etc/fai-amd64 ). The corresponding nfsroots are created correctly :

/srv/fai/nfsroot-amd64
/srv/fai/nfsroot-amdi386

But if the -C option is set on the fai-chboot command ( fai-chboot
-IFv -C /etc/fai-i386 host ) the correct kernel is not automatically
selected. fai-chboot select the last kernel found in /srv/tftp/fai
directory :

if ($opt_i || $opt_s) {
$kernelsuffix = (glob "$tftproot/vmlinuz*$opt_s")[-1];
$kernelsuffix=~ s/.+vmlinuz-//;
die "No kernel found matching $tftproot/vmlinuz*$opt_s\n" unless $kernelsuffix;
}

Maybe fai-chboot can check first the kernels in the nfsroot directory
(in /srv/fai/nfsroot-amd64/boot or /srv/fai/nfsroot-i386boot) so it is
not necessary for the user to set the kernel suffix each time.
Something like this :

if ($opt_i || $opt_s) {
   $kernelsuffix = (glob "$nfsroot/boot/vmlinuz*$opt_s")[-1];
   if ! $kernelsuffix {
      $kernelsuffix = (glob "$tftproot/vmlinuz*$opt_s")[-1];
   }
$kernelsuffix=~ s/.+vmlinuz-//;
die "No kernel found matching $tftproot/vmlinuz*$opt_s\n" unless $kernelsuffix;
}

Just a proposition.


Thanks,

Baptiste.