nixpkgs/modules/installer/cd-dvd/installation-cd-base.nix
Michael Raskin a7f24fd4bb Trying to build a good rescue CD..
svn path=/nixos/branches/modular-nixos/; revision=16385
2009-07-16 09:22:40 +00:00

195 lines
6.0 KiB
Nix

# This module contains the basic configuration for building a NixOS
# installation CD.
{config, pkgs, ...}:
let
options = {
system.nixosVersion = pkgs.lib.mkOption {
default = "${builtins.readFile ../../../VERSION}";
description = ''
NixOS version number.
'';
};
installer.configModule = pkgs.lib.mkOption {
example = "./nixos/modules/installer/cd-dvd/installation-cd.nix";
description = ''
Filename of the configuration module that builds the CD
configuration. Must be specified to support reconfiguration
in live CDs.
'';
};
};
# We need a copy of the Nix expressions for Nixpkgs and NixOS on the
# CD. We put them in a tarball because accessing that many small
# files from a slow device like a CD-ROM takes too long. !!! Once
# we use squashfs, maybe we won't need this anymore.
makeTarball = tarName: input: pkgs.runCommand "tarball" {inherit tarName;}
''
ensureDir $out
(cd ${input} && tar cvfj $out/${tarName} . \
--exclude '*~' --exclude 'result')
'';
# Put the current directory in a tarball.
nixosTarball = makeTarball "nixos.tar.bz2" (pkgs.lib.cleanSource ../../..);
# Put Nixpkgs in a tarball.
nixpkgsTarball = makeTarball "nixpkgs.tar.bz2" (pkgs.lib.cleanSource pkgs.path);
# A dummy /etc/nixos/configuration.nix in the booted CD that
# rebuilds the CD's configuration (and allows the configuration to
# be modified, of course, providing a true live CD). Problem is
# that we don't really know how the CD was built - the Nix
# expression language doesn't allow us to query the expression being
# evaluated. So we'll just hope for the best.
dummyConfiguration = pkgs.writeText "configuration.nix"
''
{config, pkgs, ...}:
{
require = [${config.installer.configModule}];
# Add your own options below and run "nixos-rebuild switch".
# E.g.,
# services.sshd.enable = true;
}
'';
in
{
require =
[ options
./iso-image.nix
./memtest.nix
../../hardware/network/intel-3945abg.nix
];
# ISO naming.
isoImage.isoName = "nixos-${config.system.nixosVersion}-${pkgs.stdenv.system}.iso";
isoImage.volumeID = "NIXOS_INSTALL_CD_${config.system.nixosVersion}";
# Use Linux 2.6.29.
boot.kernelPackages = pkgs.kernelPackages_2_6_29;
# Show the manual.
services.nixosManual.showManual = true;
# Let the user play Rogue on TTY 8 during the installation.
services.rogue.enable = true;
# Disable some other stuff we don't need.
security.sudo.enable = false;
# Include only the en_US locale. This saves 75 MiB or so compared to
# the full glibcLocales package.
i18n.supportedLocales = ["en_US.UTF-8/UTF-8" "en_US/ISO-8859-1"];
# Include some utilities that are useful for installing or repairing
# the system.
environment.systemPackages =
[ pkgs.subversion # for nixos-checkout
pkgs.w3m # needed for the manual anyway
pkgs.testdisk # useful for repairing boot problems
pkgs.mssys # for writing Microsoft boot sectors / MBRs
pkgs.ntfsprogs # for resizing NTFS partitions
pkgs.parted
pkgs.sshfsFuse
];
# The initrd has to contain any module that might be necessary for
# mounting the CD/DVD.
boot.initrd.extraKernelModules =
[ # SATA/PATA support.
"ahci"
"ata_piix"
"sata_inic162x" "sata_nv" "sata_promise" "sata_qstor"
"sata_sil" "sata_sil24" "sata_sis" "sata_svw" "sata_sx4"
"sata_uli" "sata_via" "sata_vsc"
"pata_ali" "pata_amd" "pata_artop" "pata_atiixp"
"pata_cs5520" "pata_cs5530" /* "pata_cs5535" */ "pata_efar"
"pata_hpt366" "pata_hpt37x" "pata_hpt3x2n" "pata_hpt3x3"
"pata_it8213" "pata_it821x" "pata_jmicron" "pata_marvell"
"pata_mpiix" "pata_netcell" "pata_ns87410" "pata_oldpiix"
"pata_pcmcia" "pata_pdc2027x" /* "pata_qdi" */ "pata_rz1000"
"pata_sc1200" "pata_serverworks" "pata_sil680" "pata_sis"
"pata_sl82c105" "pata_triflex" "pata_via"
# "pata_winbond" <-- causes timeouts in sd_mod
# SCSI support (incomplete).
"3w-9xxx" "3w-xxxx" "aic79xx" "aic7xxx" "arcmsr"
# USB support, especially for booting from USB CD-ROM
# drives. Also include USB keyboard support for when
# something goes wrong in stage 1.
"ehci_hcd"
"ohci_hcd"
"uhci_hcd"
"usbhid"
"usb_storage"
# Firewire support. Not tested.
"ohci1394" "sbp2"
# Virtio (QEMU, KVM etc.) support.
"virtio_net" "virtio_pci" "virtio_blk" "virtio_balloon"
# Wait for SCSI devices to appear.
"scsi_wait_scan"
];
# nixos-install will do a pull from this channel to speed up the
# installation.
installer.nixpkgsURL = http://nixos.org/releases/nixpkgs/channels/nixpkgs-unstable;
boot.postBootCommands =
''
export PATH=${pkgs.gnutar}/bin:${pkgs.bzip2}/bin:$PATH
# Provide a mount point for nixos-install.
mkdir -p /mnt
# Provide the NixOS/Nixpkgs sources in /etc/nixos. This is required
# for nixos-install.
echo "unpacking the NixOS/Nixpkgs sources..."
mkdir -p /etc/nixos/nixos
tar xjf ${nixosTarball}/nixos.tar.bz2 -C /etc/nixos/nixos
mkdir -p /etc/nixos/nixpkgs
tar xjf ${nixpkgsTarball}/nixpkgs.tar.bz2 -C /etc/nixos/nixpkgs
chown -R root.root /etc/nixos
# Provide a configuration for the CD/DVD itself, to allow users
# to run nixos-rebuild to change the configuration of the
# running system on the CD/DVD.
cp ${dummyConfiguration} /etc/nixos/configuration.nix
'';
# Some more help text.
services.mingetty.helpLine =
''
Log in as "root" with an empty password. ${
if config.services.xserver.enable then
"Type `start xserver' to start\nthe graphical user interface."
else ""
}
'';
# To speed up installation a little bit, include the complete stdenv
# in the Nix store on the CD.
isoImage.storeContents = [pkgs.stdenv];
}