Build a bare bones bootable nixos qcow2 image suitable for running with libvirt/qemu/kvm.
nix-build '<nixpkgs/nixos>' -A config.system.build.qcow2 --arg configuration "{ imports = [ ./build-qcow2.nix ]; }"
Should create a results directory that symlinks to a qcow2 image in the store.
I basically copied this from the openstack image in nixpkgs because I don't know a better way.
| { config, lib, pkgs, ... }: | |
| with lib; | |
| { | |
| imports = | |
| [ | |
| <nixpkgs/nixos/modules/installer/cd-dvd/channel.nix> | |
| ./machine-config.nix | |
| ]; | |
| system.build.qcow2 = import <nixpkgs/nixos/lib/make-disk-image.nix> { | |
| inherit lib config; | |
| pkgs = import <nixpkgs> { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package | |
| diskSize = 8192; | |
| format = "qcow2"; | |
| configFile = pkgs.writeText "configuration.nix" | |
| '' | |
| { | |
| imports = [ <./machine-config.nix> ]; | |
| } | |
| ''; | |
| }; | |
| } |
| { pkgs, lib, ... }: [3/1275] | |
| with lib; | |
| { | |
| imports = [ | |
| <nixpkgs/nixos/modules/profiles/qemu-guest.nix> | |
| ]; | |
| config = { | |
| fileSystems."/" = { | |
| device = "/dev/disk/by-label/nixos"; | |
| fsType = "ext4"; | |
| autoResize = true; | |
| }; | |
| boot.growPartition = true; | |
| boot.kernelParams = [ "console=ttyS0" ]; | |
| boot.loader.grub.device = "/dev/vda"; | |
| boot.loader.timeout = 0; | |
| users.extraUsers.root.password = ""; | |
| }; | |
| } |