155 lines
5.4 KiB
Nix
155 lines
5.4 KiB
Nix
{ config, pkgs, ... }:
|
|
|
|
with pkgs.lib;
|
|
|
|
{
|
|
imports = [ ../profiles/headless.nix ../profiles/qemu-guest.nix ];
|
|
|
|
system.build.googleComputeImage =
|
|
pkgs.vmTools.runInLinuxVM (
|
|
pkgs.runCommand "google-compute-image"
|
|
{ preVM =
|
|
''
|
|
mkdir $out
|
|
diskImage=$out/$diskImageBase
|
|
truncate $diskImage --size 10G
|
|
mv closure xchg/
|
|
'';
|
|
|
|
postVM =
|
|
''
|
|
PATH=$PATH:${pkgs.gnutar}/bin:${pkgs.gzip}/bin
|
|
pushd $out
|
|
tar -Szcf $diskImageBase.tar.gz $diskImageBase
|
|
rm $out/$diskImageBase
|
|
popd
|
|
'';
|
|
diskImageBase = "nixos-${config.system.nixosVersion}-${pkgs.stdenv.system}.raw";
|
|
buildInputs = [ pkgs.utillinux pkgs.perl ];
|
|
exportReferencesGraph =
|
|
[ "closure" config.system.build.toplevel ];
|
|
}
|
|
''
|
|
# Create partition table
|
|
${pkgs.parted}/sbin/parted /dev/vda mklabel msdos
|
|
${pkgs.parted}/sbin/parted /dev/vda mkpart primary ext4 1 10G
|
|
${pkgs.parted}/sbin/parted /dev/vda print
|
|
. /sys/class/block/vda1/uevent
|
|
mknod /dev/vda1 b $MAJOR $MINOR
|
|
|
|
# Create an empty filesystem and mount it.
|
|
${pkgs.e2fsprogs}/sbin/mkfs.ext4 -L nixos /dev/vda1
|
|
${pkgs.e2fsprogs}/sbin/tune2fs -c 0 -i 0 /dev/vda1
|
|
|
|
mkdir /mnt
|
|
mount /dev/vda1 /mnt
|
|
|
|
# The initrd expects these directories to exist.
|
|
mkdir /mnt/dev /mnt/proc /mnt/sys
|
|
|
|
mount --bind /proc /mnt/proc
|
|
mount --bind /dev /mnt/dev
|
|
mount --bind /sys /mnt/sys
|
|
|
|
# Copy all paths in the closure to the filesystem.
|
|
storePaths=$(perl ${pkgs.pathsFromGraph} /tmp/xchg/closure)
|
|
|
|
mkdir -p /mnt/nix/store
|
|
echo "copying everything (will take a while)..."
|
|
cp -prd $storePaths /mnt/nix/store/
|
|
|
|
# Register the paths in the Nix database.
|
|
printRegistration=1 perl ${pkgs.pathsFromGraph} /tmp/xchg/closure | \
|
|
chroot /mnt ${config.nix.package}/bin/nix-store --load-db
|
|
|
|
# Create the system profile to allow nixos-rebuild to work.
|
|
chroot /mnt ${config.nix.package}/bin/nix-env \
|
|
-p /nix/var/nix/profiles/system --set ${config.system.build.toplevel}
|
|
|
|
# `nixos-rebuild' requires an /etc/NIXOS.
|
|
mkdir -p /mnt/etc
|
|
touch /mnt/etc/NIXOS
|
|
|
|
# `switch-to-configuration' requires a /bin/sh
|
|
mkdir -p /mnt/bin
|
|
ln -s ${config.system.build.binsh}/bin/sh /mnt/bin/sh
|
|
|
|
# Install a configuration.nix.
|
|
mkdir -p /mnt/etc/nixos /mnt/boot/grub
|
|
cp ${./google-compute-config.nix} /mnt/etc/nixos/configuration.nix
|
|
|
|
# Generate the GRUB menu.
|
|
ln -s vda /dev/sda
|
|
chroot /mnt ${config.system.build.toplevel}/bin/switch-to-configuration boot
|
|
|
|
umount /mnt/proc /mnt/dev /mnt/sys
|
|
umount /mnt
|
|
''
|
|
);
|
|
|
|
fileSystems."/".label = "nixos";
|
|
|
|
boot.kernelParams = [ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
|
|
boot.initrd.kernelModules = [ "virtio_scsi" ];
|
|
|
|
# Generate a GRUB menu. Amazon's pv-grub uses this to boot our kernel/initrd.
|
|
boot.loader.grub.device = "/dev/sda";
|
|
boot.loader.grub.timeout = 0;
|
|
|
|
# Don't put old configurations in the GRUB menu. The user has no
|
|
# way to select them anyway.
|
|
boot.loader.grub.configurationLimit = 0;
|
|
|
|
# Allow root logins only using the SSH key that the user specified
|
|
# at instance creation time.
|
|
services.openssh.enable = true;
|
|
services.openssh.permitRootLogin = "without-password";
|
|
|
|
# Force getting the hostname from Google Compute.
|
|
networking.hostName = mkDefault "";
|
|
|
|
# Always include cryptsetup so that NixOps can use it.
|
|
environment.systemPackages = [ pkgs.cryptsetup ];
|
|
|
|
# Prevent logging in as root without a password. This doesn't really matter,
|
|
# since the only PAM services that allow logging in with a null
|
|
# password are local ones that are inaccessible on Google Compute machines.
|
|
security.initialRootPassword = "!";
|
|
|
|
# Configure default metadata hostnames
|
|
networking.extraHosts = ''
|
|
169.254.169.254 metadata.google.internal metadata
|
|
'';
|
|
|
|
systemd.services.fetch-root-authorized-keys =
|
|
{ description = "Fetch authorized_keys for root user";
|
|
|
|
wantedBy = [ "multi-user.target" ];
|
|
before = [ "sshd.service" ];
|
|
after = [ "network.target" ];
|
|
|
|
path = [ pkgs.curl ];
|
|
script =
|
|
''
|
|
# Don't download the SSH key if it has already been downloaded
|
|
if ! [ -e /root/.ssh/authorized_keys ]; then
|
|
echo "obtaining SSH key..."
|
|
mkdir -p /root/.ssh
|
|
curl -o /root/authorized-keys-metadata http://metadata/0.1/meta-data/authorized-keys
|
|
if [ $? -eq 0 -a -e /root/authorized-keys-metadata ]; then
|
|
cat /root/authorized-keys-metadata | cut -d: -f2- > /root/key.pub
|
|
if ! grep -q -f /root/key.pub /root/.ssh/authorized_keys; then
|
|
cat /root/key.pub >> /root/.ssh/authorized_keys
|
|
echo "new key added to authorized_keys"
|
|
fi
|
|
chmod 600 /root/.ssh/authorized_keys
|
|
rm -f /root/key.pub /root/authorized-keys-metadata
|
|
fi
|
|
fi
|
|
'';
|
|
serviceConfig.Type = "oneshot";
|
|
serviceConfig.RemainAfterExit = true;
|
|
};
|
|
|
|
|
|
}
|