2021-12-06 16:07:01 +00:00
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{ config, pkgs, lib, ... }:
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with lib;
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{
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options.proxmox = {
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qemuConf = {
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# essential configs
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boot = mkOption {
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type = types.str;
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default = "";
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example = "order=scsi0;net0";
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2022-08-21 13:32:41 +00:00
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Default boot device. PVE will try all devices in its default order if this value is empty.
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'';
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};
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scsihw = mkOption {
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type = types.str;
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default = "virtio-scsi-pci";
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example = "lsi";
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2022-08-21 13:32:41 +00:00
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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SCSI controller type. Must be one of the supported values given in
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<https://pve.proxmox.com/wiki/Qemu/KVM_Virtual_Machines>
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2021-12-06 16:07:01 +00:00
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'';
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};
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virtio0 = mkOption {
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type = types.str;
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default = "local-lvm:vm-9999-disk-0";
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example = "ceph:vm-123-disk-0";
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2022-08-21 13:32:41 +00:00
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Configuration for the default virtio disk. It can be used as a cue for PVE to autodetect the target sotrage.
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This parameter is required by PVE even if it isn't used.
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'';
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};
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ostype = mkOption {
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type = types.str;
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default = "l26";
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Guest OS type
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'';
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};
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cores = mkOption {
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type = types.ints.positive;
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default = 1;
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2022-08-21 13:32:41 +00:00
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Guest core count
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'';
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};
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memory = mkOption {
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type = types.ints.positive;
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default = 1024;
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2022-08-21 13:32:41 +00:00
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Guest memory in MB
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'';
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};
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# optional configs
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name = mkOption {
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type = types.str;
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default = "nixos-${config.system.nixos.label}";
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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VM name
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'';
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};
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net0 = mkOption {
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type = types.commas;
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default = "virtio=00:00:00:00:00:00,bridge=vmbr0,firewall=1";
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Configuration for the default interface. When restoring from VMA, check the
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"unique" box to ensure device mac is randomized.
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'';
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};
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serial0 = mkOption {
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type = types.str;
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default = "socket";
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example = "/dev/ttyS0";
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Create a serial device inside the VM (n is 0 to 3), and pass through a host serial device (i.e. /dev/ttyS0),
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or create a unix socket on the host side (use qm terminal to open a terminal connection).
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'';
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};
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agent = mkOption {
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type = types.bool;
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apply = x: if x then "1" else "0";
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default = true;
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Expect guest to have qemu agent running
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'';
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};
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};
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qemuExtraConf = mkOption {
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type = with types; attrsOf (oneOf [ str int ]);
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default = {};
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example = literalExpression ''{
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cpu = "host";
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onboot = 1;
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}'';
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Additional options appended to qemu-server.conf
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'';
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};
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filenameSuffix = mkOption {
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type = types.str;
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default = config.proxmox.qemuConf.name;
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example = "999-nixos_template";
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description = lib.mdDoc ''
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2021-12-06 16:07:01 +00:00
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Filename of the image will be vzdump-qemu-''${filenameSuffix}.vma.zstd.
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This will also determine the default name of the VM on restoring the VMA.
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Start this value with a number if you want the VMA to be detected as a backup of
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any specific VMID.
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'';
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};
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};
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config = let
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cfg = config.proxmox;
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cfgLine = name: value: ''
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${name}: ${builtins.toString value}
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'';
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cfgFile = fileName: properties: pkgs.writeTextDir fileName ''
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# generated by NixOS
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${lib.concatStrings (lib.mapAttrsToList cfgLine properties)}
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#qmdump#map:virtio0:drive-virtio0:local-lvm:raw:
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'';
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in {
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system.build.VMA = import ../../lib/make-disk-image.nix {
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name = "proxmox-${cfg.filenameSuffix}";
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postVM = let
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# Build qemu with PVE's patch that adds support for the VMA format
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vma = pkgs.qemu_kvm.overrideAttrs ( super: rec {
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# proxmox's VMA patch doesn't work with qemu 7.0 yet
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version = "6.2.0";
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src = pkgs.fetchurl {
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url= "https://download.qemu.org/qemu-${version}.tar.xz";
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hash = "sha256-aOFdjkWsVjJuC5pK+otJo9/oq6NIgiHQmMhGmLymW0U=";
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};
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patches = let
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rev = "b37b17c286da3d32945fbee8ee4fd97a418a50db";
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path = "debian/patches/pve/0026-PVE-Backup-add-vma-backup-format-code.patch";
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vma-patch = pkgs.fetchpatch {
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url = "https://git.proxmox.com/?p=pve-qemu.git;a=blob_plain;h=${rev};f=${path}";
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hash = "sha256-siuDWDUnM9Zq0/L2Faww3ELAOUHhVIHu5RAQn6L4Atc=";
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};
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in [ vma-patch ];
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buildInputs = super.buildInputs ++ [ pkgs.libuuid ];
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2021-12-06 16:07:01 +00:00
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});
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in
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''
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${vma}/bin/vma create "vzdump-qemu-${cfg.filenameSuffix}.vma" \
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-c ${cfgFile "qemu-server.conf" (cfg.qemuConf // cfg.qemuExtraConf)}/qemu-server.conf drive-virtio0=$diskImage
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rm $diskImage
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${pkgs.zstd}/bin/zstd "vzdump-qemu-${cfg.filenameSuffix}.vma"
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mv "vzdump-qemu-${cfg.filenameSuffix}.vma.zst" $out/
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'';
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format = "raw";
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inherit config lib pkgs;
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};
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boot = {
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growPartition = true;
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kernelParams = [ "console=ttyS0" ];
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loader.grub.device = lib.mkDefault "/dev/vda";
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loader.timeout = 0;
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initrd.availableKernelModules = [ "uas" "virtio_blk" "virtio_pci" ];
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};
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fileSystems."/" = {
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device = "/dev/disk/by-label/nixos";
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autoResize = true;
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fsType = "ext4";
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};
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services.qemuGuest.enable = lib.mkDefault true;
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};
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}
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