{ config, lib, pkgs, ... }: with lib; let diskSize = "20G"; in { imports = [ ../profiles/headless.nix ../profiles/qemu-guest.nix ]; system.build.brightboxImage = pkgs.vmTools.runInLinuxVM ( pkgs.runCommand "brightbox-image" { preVM = '' mkdir $out diskImage=$out/$diskImageBase truncate $diskImage --size ${diskSize} mv closure xchg/ ''; postVM = '' PATH=$PATH:${lib.makeBinPath [ pkgs.gnutar pkgs.gzip ]} pushd $out ${pkgs.qemu_kvm}/bin/qemu-img convert -c -O qcow2 $diskImageBase nixos.qcow2 rm $diskImageBase popd ''; diskImageBase = "nixos-image-${config.system.nixosLabel}-${pkgs.stdenv.system}.raw"; buildInputs = [ pkgs.utillinux pkgs.perl ]; exportReferencesGraph = [ "closure" config.system.build.toplevel ]; } '' # Create partition table ${pkgs.parted}/sbin/parted --script /dev/vda mklabel msdos ${pkgs.parted}/sbin/parted --script /dev/vda mkpart primary ext4 1 ${diskSize} ${pkgs.parted}/sbin/parted --script /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.out}/bin/nix-store --load-db --option build-users-group "" # Create the system profile to allow nixos-rebuild to work. chroot /mnt ${config.nix.package.out}/bin/nix-env \ -p /nix/var/nix/profiles/system --set ${config.system.build.toplevel} \ --option build-users-group "" # `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 ${./brightbox-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"; # Generate a GRUB menu. Amazon's pv-grub uses this to boot our kernel/initrd. boot.loader.grub.device = "/dev/vda"; boot.loader.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 = "prohibit-password"; # Force getting the hostname from Google Compute. networking.hostName = mkDefault ""; # Always include cryptsetup so that NixOps can use it. environment.systemPackages = [ pkgs.cryptsetup ]; systemd.services."fetch-ec2-data" = { description = "Fetch EC2 Data"; wantedBy = [ "multi-user.target" "sshd.service" ]; before = [ "sshd.service" ]; wants = [ "network-online.target" ]; after = [ "network-online.target" ]; path = [ pkgs.wget pkgs.iproute ]; script = '' wget="wget -q --retry-connrefused -O -" ${optionalString (config.networking.hostName == "") '' echo "setting host name..." ${pkgs.nettools}/bin/hostname $($wget http://169.254.169.254/latest/meta-data/hostname) ''} # Don't download the SSH key if it has already been injected # into the image (a Nova feature). if ! [ -e /root/.ssh/authorized_keys ]; then echo "obtaining SSH key..." mkdir -m 0700 -p /root/.ssh $wget http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key > /root/key.pub if [ $? -eq 0 -a -e /root/key.pub ]; then 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 fi fi # Extract the intended SSH host key for this machine from # the supplied user data, if available. Otherwise sshd will # generate one normally. $wget http://169.254.169.254/2011-01-01/user-data > /root/user-data || true key="$(sed 's/|/\n/g; s/SSH_HOST_DSA_KEY://; t; d' /root/user-data)" key_pub="$(sed 's/SSH_HOST_DSA_KEY_PUB://; t; d' /root/user-data)" if [ -n "$key" -a -n "$key_pub" -a ! -e /etc/ssh/ssh_host_dsa_key ]; then mkdir -m 0755 -p /etc/ssh (umask 077; echo "$key" > /etc/ssh/ssh_host_dsa_key) echo "$key_pub" > /etc/ssh/ssh_host_dsa_key.pub fi ''; serviceConfig.Type = "oneshot"; serviceConfig.RemainAfterExit = true; }; }