mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-19 12:14:10 +00:00
62e95d095d
Allow the user to disable overriding the fileSystems option with
virtualisation.fileSystems by setting
`virtualisation.fileSystems = lib.mkForce { };`.
With this change you can use the qemu-vm module to boot from an external
image that was not produced by the qemu-vm module itself. The user can
now re-use the modularly set fileSystems option instead of having to
reproduce it in virtualisation.fileSystems.
74 lines
2.1 KiB
Nix
74 lines
2.1 KiB
Nix
# Tests that you can boot from an external disk image with the qemu-vm module.
|
|
# "External" here means that the image was not produced within the qemu-vm
|
|
# module and relies on the fileSystems option also set outside the qemu-vm
|
|
# module. Most notably, this tests that you can stop the qemu-vm module from
|
|
# overriding fileSystems with virtualisation.fileSystems so you don't have to
|
|
# replicate the previously set fileSystems in virtualisation.fileSystems.
|
|
|
|
{ lib, ... }:
|
|
|
|
let
|
|
rootFslabel = "external";
|
|
rootFsDevice = "/dev/disk/by-label/${rootFslabel}";
|
|
|
|
externalModule = { config, lib, pkgs, ... }: {
|
|
boot.loader.systemd-boot.enable = true;
|
|
|
|
fileSystems = {
|
|
"/".device = rootFsDevice;
|
|
};
|
|
|
|
system.build.diskImage = import ../lib/make-disk-image.nix {
|
|
inherit config lib pkgs;
|
|
label = rootFslabel;
|
|
partitionTableType = "efi";
|
|
format = "qcow2";
|
|
bootSize = "32M";
|
|
additionalSpace = "0M";
|
|
copyChannel = false;
|
|
};
|
|
};
|
|
in
|
|
{
|
|
name = "qemu-vm-external-disk-image";
|
|
|
|
meta.maintainers = with lib.maintainers; [ nikstur ];
|
|
|
|
nodes.machine = { config, lib, pkgs, ... }: {
|
|
virtualisation.directBoot.enable = false;
|
|
virtualisation.mountHostNixStore = false;
|
|
virtualisation.useEFIBoot = true;
|
|
|
|
# This stops the qemu-vm module from overriding the fileSystems option
|
|
# with virtualisation.fileSystems.
|
|
virtualisation.fileSystems = lib.mkForce { };
|
|
|
|
imports = [ externalModule ];
|
|
};
|
|
|
|
testScript = { nodes, ... }: ''
|
|
import os
|
|
import subprocess
|
|
import tempfile
|
|
|
|
tmp_disk_image = tempfile.NamedTemporaryFile()
|
|
|
|
subprocess.run([
|
|
"${nodes.machine.virtualisation.qemu.package}/bin/qemu-img",
|
|
"create",
|
|
"-f",
|
|
"qcow2",
|
|
"-b",
|
|
"${nodes.machine.system.build.diskImage}/nixos.qcow2",
|
|
"-F",
|
|
"qcow2",
|
|
tmp_disk_image.name,
|
|
])
|
|
|
|
# Set NIX_DISK_IMAGE so that the qemu script finds the right disk image.
|
|
os.environ['NIX_DISK_IMAGE'] = tmp_disk_image.name
|
|
|
|
machine.succeed("findmnt --kernel --source ${rootFsDevice} --target /")
|
|
'';
|
|
}
|