nixpkgs/instances/rescue-cd.nix
Eelco Dolstra 3e7f4280df * activate-configuration.sh: make sure that we're running on a NixOS
installation to prevent horrible accidents.
* Add the kernel parameters to isolinux.cfg.
* Use useradd/groupadd to create users/groups; use Glibc's getent to
  check for existence.
* Create the root account properly.

svn path=/nixos/trunk/; revision=7357
2006-12-16 21:48:12 +00:00

117 lines
2.9 KiB
Nix

rec {
configuration = {
boot = {
autoDetectRootDevice = true;
readOnlyRoot = true;
# The label used to identify the installation CD.
rootLabel = "NIXOS";
};
services = {
sshd = {
enable = false;
};
xserver = {
enable = false;
};
};
};
system = import ../configuration/system.nix {
inherit configuration;
stage2Init = "/init";
};
pkgs = system.pkgs;
# Since the CD is read-only, the mount points must be on disk.
cdMountPoints = pkgs.runCommand "mount-points" {} "
ensureDir $out
cd $out
mkdir proc sys tmp etc dev var mnt nix nix/var root
touch $out/${configuration.boot.rootLabel}
";
# 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.
makeTarball = tarName: input: pkgs.runCommand "tarball" {inherit tarName;} "
ensureDir $out
(cd ${input} && tar cvfj $out/${tarName} . \\
--exclude '*~' \\
--exclude 'pkgs' --exclude 'result')
";
# Put the current directory in a tarball (making sure to filter
# out crap like the .svn directories).
nixosTarball = makeTarball "nixos.tar.bz2" (builtins.filterSource
(name: let base = baseNameOf (toString name); in base != ".svn" && base != "result") ./..);
# Get a recent copy of Nixpkgs.
nixpkgsRel = "nixpkgs-0.11pre7355";
nixpkgsURL = http://nix.cs.uu.nl/dist/nix/ + nixpkgsRel;
nixpkgsTarball = pkgs.fetchurl {
url = nixpkgsURL + "/" + nixpkgsRel + ".tar.bz2";
md5 = "9d3e5e9f6ab64536803abf3f2e1c6056";
};
# The configuration file for isolinux.
isolinuxCfg = pkgs.writeText "isolinux.cfg" "
default linux
prompt 1
timeout 60
label linux
kernel vmlinuz
append initrd=initrd ${toString (system.config.get ["boot" "kernelParams"])}
";
# Create an ISO image containing the isolinux boot loader, the
# kernel, the initrd produced above, and the closure of the stage 2
# init.
rescueCD = import ../helpers/make-iso9660-image.nix {
inherit (pkgs) stdenv cdrtools;
isoName = "nixos.iso";
contents = [
{ source = pkgs.syslinux + "/lib/syslinux/isolinux.bin";
target = "isolinux/isolinux.bin";
}
{ source = isolinuxCfg;
target = "isolinux/isolinux.cfg";
}
{ source = pkgs.kernel + "/vmlinuz";
target = "isolinux/vmlinuz";
}
{ source = system.initialRamdisk + "/initrd";
target = "isolinux/initrd";
}
{ source = cdMountPoints;
target = "/";
}
{ source = nixosTarball + "/" + nixosTarball.tarName;
target = "/" + nixosTarball.tarName;
}
{ source = nixpkgsTarball;
target = "/nixpkgs.tar.bz2";
}
];
init = system.bootStage2;
bootable = true;
bootImage = "isolinux/isolinux.bin";
};
}