import ./make-test-python.nix ({ lib, pkgs, ... }: { name = "non-default-filesystems"; nodes.machine = { config, pkgs, lib, ... }: let disk = config.virtualisation.rootDevice; in { virtualisation.rootDevice = "/dev/vda"; virtualisation.useDefaultFilesystems = false; boot.initrd.availableKernelModules = [ "btrfs" ]; boot.supportedFilesystems = [ "btrfs" ]; boot.initrd.postDeviceCommands = '' FSTYPE=$(blkid -o value -s TYPE ${disk} || true) if test -z "$FSTYPE"; then modprobe btrfs ${pkgs.btrfs-progs}/bin/mkfs.btrfs ${disk} mkdir /nixos mount -t btrfs ${disk} /nixos ${pkgs.btrfs-progs}/bin/btrfs subvolume create /nixos/root ${pkgs.btrfs-progs}/bin/btrfs subvolume create /nixos/home umount /nixos fi ''; virtualisation.fileSystems = { "/" = { device = disk; fsType = "btrfs"; options = [ "subvol=/root" ]; }; "/home" = { device = disk; fsType = "btrfs"; options = [ "subvol=/home" ]; }; }; }; testScript = '' machine.wait_for_unit("multi-user.target") with subtest("BTRFS filesystems are mounted correctly"): machine.succeed("grep -E '/dev/vda / btrfs rw,relatime,space_cache=v2,subvolid=[0-9]+,subvol=/root 0 0' /proc/mounts") machine.succeed("grep -E '/dev/vda /home btrfs rw,relatime,space_cache=v2,subvolid=[0-9]+,subvol=/home 0 0' /proc/mounts") ''; })