automated iso download for pxe boot
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commit
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10 changed files with 129 additions and 101 deletions
108
mods/pxeboot.nix
108
mods/pxeboot.nix
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@ -42,36 +42,46 @@
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};
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};
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systemd = {
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tmpfiles.rules = [ "d /var/lib/podman-dracut 0755 root root -" ];
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tmpfiles.rules = [ "d /srv/tftp" ];
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services.pxeboot = {
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serviceConfig.Type = "oneshot";
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#wantedBy = [ "multi-user.target" ];
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path = with pkgs; [ xz e2fsprogs grub2_efi util-linux ];
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before = [ "nfs-server.service" ];
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requiredBy = [ "nfs-server.service" ];
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path = with pkgs; [ xz curl e2fsprogs grub2_efi util-linux ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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ExecStop = pkgs.writeShellScript "stop.sh" ''
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set -e
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for distro in arch fedora; do
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cd /srv/nfs/$distro
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mountpoint -q root && umount root
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mountpoint -q lower && umount lower
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mountpoint -q loop && umount loop
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done
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'';
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};
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script = let
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resolv = pkgs.writeText "resolv.conf" ''
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nameserver fc02::1
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nameserver 10.2.0.1
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options edns0 trust-ad
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'';
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entryScript = pkgs.writeText "entry.sh" ''
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set -e
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dnf install -y dracut-network nfs-utils
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cd /data/workdir
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for target in $(cd ..; ls | grep -v workdir); do
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modsDir=../$target/usr/lib/modules/*
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mkdir $target
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cp $modsDir/vmlinuz $target
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dracut -Nm "network-manager nfs" --zstd -k $modsDir \
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--kver $(basename $modsDir) $target/initramfs
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done
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'';
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archIso = {
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rootfs = "arch/x86_64/airootfs.sfs";
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hash = "684ded26c63240ff4a41e8c25ee84ea6da233f557364821f13d12c2b0a9059a5";
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url = "https://fastly.mirror.pkgbuild.com/iso/2026.10.01/archlinux-x86_64.iso";
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};
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fedoraIso = {
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rootfs = "LiveOS/squashfs.img";
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hash = "1620295f6a00c27c3208f0c00b8ece4eab1ec69b9002152d97488bf26a426ddf";
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url = "https://download.fedoraproject.org/pub/fedora/linux/releases/" +
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"44/Workstation/x86_64/iso/Fedora-Workstation-Live-44-1.7.x86_64.iso";
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};
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grubCfg = pkgs.writeText "grub.cfg" ''
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set timeout=5
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#set path=(http,$net_default_server)/local/boot/pxe
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set nfs="rw ip=dhcp root=nfs4:$net_default_server:/srv/nfs"
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function load {
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linux $path/$1/vmlinuz $nfs/$1/root $2
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initrd $path/$1/initramfs
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set p=$cmdpath/boot/$1
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linux $p/vmlinuz $2 rw ip=dhcp root=nfs4:$net_default_server:/srv/nfs/$1/root
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initrd $p/boot/$1/initramfs
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}
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menuentry Arch {
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load arch
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@ -80,15 +90,40 @@
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load fedora selinux=0
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}
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'';
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entryScript = pkgs.writeShellScript "entry.sh" ''
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set -e
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dnf install -y nfs-utils dracut-network
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cd /data/workdir
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for target in $(ls .. | grep -v workdir); do
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mkdir $target
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modsDir=../$target/usr/lib/modules/*
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cp $modsDir/vmlinuz $target
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dracut -Nm "network-manager nfs" --zstd -k $modsDir \
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--kver $(basename $modsDir) $target/initramfs
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done
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'';
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in ''
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for distro in arch:arch/x86_64/airootfs.sfs fedora:LiveOS/squashfs.img; do
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rootfs=''${distro##*:}
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distro=''${distro%:*}
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for distro in arch fedora; do
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case $distro in
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arch) url=${archIso.url}
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rootfs=${archIso.rootfs}
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hash=${archIso.hash};;
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fedora) url=${fedoraIso.url}
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rootfs=${fedoraIso.rootfs}
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hash=${fedoraIso.hash};;
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esac
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mkdir -p /srv/nfs/$distro
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cd /srv/nfs/$distro
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mkdir -p loop work lower upper #root -> move to tmpfiles
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if [ ! -e $distro.iso ]; then
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curl -C - "$url" -Lo $distro.iso.tmp
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mv $distro.iso{.tmp,}
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sha256sum $distro.iso | grep $hash
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fi
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mkdir -p loop root work lower upper
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mountpoint -q loop || mount $distro.iso loop
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mountpoint -q lower || mount loop/$rootfs lower
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mountpoint -q root || mount -t overlay overlay -o workdir=work,nfs_export=on,lowerdir=lower,upperdir=upper root
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mountpoint -q root || mount -t overlay overlay root -o \
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workdir=work,nfs_export=on,lowerdir=lower,upperdir=upper
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if [ ! -e upper/etc/resolv.conf ]; then
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cd root/etc
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rm -f resolv.conf
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@ -96,19 +131,20 @@
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chattr +i resolv.conf
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fi
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done
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cd /srv
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#either check of tftp dir, or file in tftp, if it forced to exists through tmpfiles
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cd /srv/tftp
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if [ ! -e grubx64.efi ]; then
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grub-mkstandalone -O x86_64-efi --compress=xz -o grubx64.efi #--modules=efinet /boot/grub/grub.cfg=${grubCfg}
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grub-mkstandalone -O x86_64-efi --compress=xz -o \
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grubx64.efi --modules=efinet /boot/grub/grub.cfg=${grubCfg}
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fi
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if [ ! -e pxe ]; then
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mkdir pxe
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cp ${entryScript} /var/lib/podman-dracut/entry.sh
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if [ ! -e boot ]; then
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workdir=/var/lib/podman-dracut
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rm -rf $workdir
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mkdir boot $workdir
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cp ${entryScript} $workdir/entry.sh
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systemctl --wait start podman-fedora-dracut.service
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mv /var/lib/podman-dracut/*/ pxe
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chmod -R 640 pxe
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chgrp -R php pxe
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chmod ug+x $(find pxe -type d)
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mv $workdir/*/ boot
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chmod -R 644 boot
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chmod +x $(find boot -type d)
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fi
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'';
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};
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