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# Usage:
# $ NIXOS_CONFIG=`pwd`/nixos/modules/virtualisation/nova-image.nix nix-build '<nixpkgs/nixos>' -A config.system.build.novaImage
{ config, lib, pkgs, ... }:
with lib;
{
system.build.novaImage = import ../../lib/make-disk-image.nix {
inherit pkgs lib config;
partitioned = true;
diskSize = 1 * 1024;
configFile = pkgs.writeText "configuration.nix"
''
{
imports = [ <nixpkgs/nixos/modules/virtualisation/nova-image.nix> ];
}
'';
};
imports = [
../profiles/qemu-guest.nix
../profiles/headless.nix
];
fileSystems."/".device = "/dev/disk/by-label/nixos";
boot.kernelParams = [ "console=ttyS0" ];
boot.loader.grub.device = "/dev/vda";
boot.loader.grub.timeout = 0;
# Allow root logins
services.openssh.enable = true;
services.openssh.permitRootLogin = "without-password";
# Put /tmp and /var on /ephemeral0, which has a lot more space.
# Unfortunately we can't do this with the `fileSystems' option
# because it has no support for creating the source of a bind
# mount. Also, "move" /nix to /ephemeral0 by layering a unionfs-fuse
# mount on top of it so we have a lot more space for Nix operations.
/*
boot.initrd.postMountCommands =
''
mkdir -m 1777 -p $targetRoot/ephemeral0/tmp
mkdir -m 1777 -p $targetRoot/tmp
mount --bind $targetRoot/ephemeral0/tmp $targetRoot/tmp
mkdir -m 755 -p $targetRoot/ephemeral0/var
mkdir -m 755 -p $targetRoot/var
mount --bind $targetRoot/ephemeral0/var $targetRoot/var
mkdir -p /unionfs-chroot/ro-nix
mount --rbind $targetRoot/nix /unionfs-chroot/ro-nix
mkdir -p /unionfs-chroot/rw-nix
mkdir -m 755 -p $targetRoot/ephemeral0/nix
mount --rbind $targetRoot/ephemeral0/nix /unionfs-chroot/rw-nix
unionfs -o allow_other,cow,nonempty,chroot=/unionfs-chroot,max_files=32768 /rw-nix=RW:/ro-nix=RO $targetRoot/nix
'';
boot.initrd.supportedFilesystems = [ "unionfs-fuse" ];
*/
}
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