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https://github.com/nix-community/disko
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cc4d4a4b91
As `makeDiskImages` always requires a NixOS configuration, we can simplify the code by convering it into a NixOS module. Then we can make it responsible for populating `system.build.diskoImages` and `system.build.diskoImagesScript`.
78 lines
2.3 KiB
Nix
78 lines
2.3 KiB
Nix
{ diskoLib, modulesPath, config, pkgs, lib, ... }:
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let
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vm_disko = (diskoLib.testLib.prepareDiskoConfig config diskoLib.testLib.devices).disko;
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cfg_ = (lib.evalModules {
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modules = lib.singleton {
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# _file = toString input;
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imports = lib.singleton { disko.devices = vm_disko.devices; };
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options = {
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disko.devices = lib.mkOption {
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type = diskoLib.toplevel;
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};
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disko.testMode = lib.mkOption {
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type = lib.types.bool;
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default = true;
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};
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};
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};
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}).config;
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disks = lib.attrValues cfg_.disko.devices.disk;
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rootDisk = {
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name = "root";
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file = ''"$tmp"/${(builtins.head disks).name}.qcow2'';
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driveExtraOpts.cache = "writeback";
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driveExtraOpts.werror = "report";
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deviceExtraOpts.bootindex = "1";
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deviceExtraOpts.serial = "root";
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};
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otherDisks = map
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(disk: {
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name = disk.name;
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file = ''"$tmp"/${disk.name}.qcow2'';
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driveExtraOpts.werror = "report";
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})
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(builtins.tail disks);
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diskoBasedConfiguration = {
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# generated from disko config
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virtualisation.fileSystems = cfg_.disko.devices._config.fileSystems;
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boot = cfg_.disko.devices._config.boot or { };
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swapDevices = cfg_.disko.devices._config.swapDevices or [ ];
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};
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in
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{
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imports = [
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(modulesPath + "/virtualisation/qemu-vm.nix")
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diskoBasedConfiguration
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];
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disko.testMode = true;
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disko.imageBuilder.copyNixStore = false;
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disko.imageBuilder.extraConfig = {
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disko.devices = cfg_.disko.devices;
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};
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disko.imageBuilder.imageFormat = "qcow2";
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virtualisation.useEFIBoot = config.disko.tests.efi;
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virtualisation.memorySize = config.disko.memSize;
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virtualisation.useDefaultFilesystems = false;
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virtualisation.diskImage = null;
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virtualisation.qemu.drives = [ rootDisk ] ++ otherDisks;
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boot.zfs.devNodes = "/dev/disk/by-uuid"; # needed because /dev/disk/by-id is empty in qemu-vms
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boot.zfs.forceImportAll = true;
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system.build.vmWithDisko = pkgs.writers.writeDashBin "disko-vm" ''
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set -efux
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export tmp=$(mktemp -d)
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trap 'rm -rf "$tmp"' EXIT
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${lib.concatMapStringsSep "\n" (disk: ''
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${pkgs.qemu}/bin/qemu-img create -f qcow2 \
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-b ${config.system.build.diskoImages}/${disk.name}.qcow2 \
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-F qcow2 "$tmp"/${disk.name}.qcow2
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'') disks}
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set +f
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${config.system.build.vm}/bin/run-*-vm
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'';
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}
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