106 lines
3.1 KiB
Nix
106 lines
3.1 KiB
Nix
# This module creates netboot media containing the given NixOS
|
|
# configuration.
|
|
|
|
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
{
|
|
options = {
|
|
|
|
netboot.storeContents = mkOption {
|
|
example = literalExample "[ pkgs.stdenv ]";
|
|
description = ''
|
|
This option lists additional derivations to be included in the
|
|
Nix store in the generated netboot image.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
config = {
|
|
|
|
boot.loader.grub.version = 2;
|
|
|
|
# Don't build the GRUB menu builder script, since we don't need it
|
|
# here and it causes a cyclic dependency.
|
|
boot.loader.grub.enable = false;
|
|
|
|
# !!! Hack - attributes expected by other modules.
|
|
system.boot.loader.kernelFile = "bzImage";
|
|
environment.systemPackages = [ pkgs.grub2 pkgs.grub2_efi pkgs.syslinux ];
|
|
|
|
fileSystems."/" =
|
|
{ fsType = "tmpfs";
|
|
options = [ "mode=0755" ];
|
|
};
|
|
|
|
# In stage 1, mount a tmpfs on top of /nix/store (the squashfs
|
|
# image) to make this a live CD.
|
|
fileSystems."/nix/.ro-store" =
|
|
{ fsType = "squashfs";
|
|
device = "../nix-store.squashfs";
|
|
options = [ "loop" ];
|
|
neededForBoot = true;
|
|
};
|
|
|
|
fileSystems."/nix/.rw-store" =
|
|
{ fsType = "tmpfs";
|
|
options = [ "mode=0755" ];
|
|
neededForBoot = true;
|
|
};
|
|
|
|
fileSystems."/nix/store" =
|
|
{ fsType = "unionfs-fuse";
|
|
device = "unionfs";
|
|
options = [ "allow_other" "cow" "nonempty" "chroot=/mnt-root" "max_files=32768" "hide_meta_files" "dirs=/nix/.rw-store=rw:/nix/.ro-store=ro" ];
|
|
};
|
|
|
|
boot.initrd.availableKernelModules = [ "squashfs" ];
|
|
|
|
boot.initrd.kernelModules = [ "loop" ];
|
|
|
|
# Closures to be copied to the Nix store, namely the init
|
|
# script and the top-level system configuration directory.
|
|
netboot.storeContents =
|
|
[ config.system.build.toplevel ];
|
|
|
|
# Create the squashfs image that contains the Nix store.
|
|
system.build.squashfsStore = import ../../../lib/make-squashfs.nix {
|
|
inherit (pkgs) stdenv squashfsTools perl pathsFromGraph;
|
|
storeContents = config.netboot.storeContents;
|
|
};
|
|
|
|
|
|
# Create the initrd
|
|
system.build.netbootRamdisk = pkgs.makeInitrd {
|
|
inherit (config.boot.initrd) compressor;
|
|
prepend = [ "${config.system.build.initialRamdisk}/initrd" ];
|
|
|
|
contents =
|
|
[ { object = config.system.build.squashfsStore;
|
|
symlink = "/nix-store.squashfs";
|
|
}
|
|
];
|
|
};
|
|
|
|
system.build.netbootIpxeScript = pkgs.writeTextDir "netboot.ipxe" "#!ipxe\nkernel bzImage init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams}\ninitrd initrd\nboot";
|
|
|
|
boot.loader.timeout = 10;
|
|
|
|
boot.postBootCommands =
|
|
''
|
|
# After booting, register the contents of the Nix store
|
|
# in the Nix database in the tmpfs.
|
|
${config.nix.package}/bin/nix-store --load-db < /nix/store/nix-path-registration
|
|
|
|
# nixos-rebuild also requires a "system" profile and an
|
|
# /etc/NIXOS tag.
|
|
touch /etc/NIXOS
|
|
${config.nix.package}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
|
|
'';
|
|
|
|
};
|
|
|
|
}
|