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|
{ config, pkgs, lib, ... }:
with lib;
{
options.proxmox = {
qemuConf = {
# essential configs
boot = mkOption {
type = types.str;
default = "";
example = "order=scsi0;net0";
description = ''
Default boot device. PVE will try all devices in its default order if this value is empty.
'';
};
scsihw = mkOption {
type = types.str;
default = "virtio-scsi-pci";
example = "lsi";
description = ''
SCSI controller type. Must be one of the supported values given in
<https://pve.proxmox.com/wiki/Qemu/KVM_Virtual_Machines>
'';
};
virtio0 = mkOption {
type = types.str;
default = "local-lvm:vm-9999-disk-0";
example = "ceph:vm-123-disk-0";
description = ''
Configuration for the default virtio disk. It can be used as a cue for PVE to autodetect the target storage.
This parameter is required by PVE even if it isn't used.
'';
};
ostype = mkOption {
type = types.str;
default = "l26";
description = ''
Guest OS type
'';
};
cores = mkOption {
type = types.ints.positive;
default = 1;
description = ''
Guest core count
'';
};
memory = mkOption {
type = types.ints.positive;
default = 1024;
description = ''
Guest memory in MB
'';
};
bios = mkOption {
type = types.enum [ "seabios" "ovmf" ];
default = "seabios";
description = ''
Select BIOS implementation (seabios = Legacy BIOS, ovmf = UEFI).
'';
};
# optional configs
name = mkOption {
type = types.str;
default = "nixos-${config.system.nixos.label}";
description = ''
VM name
'';
};
additionalSpace = mkOption {
type = types.str;
default = "512M";
example = "2048M";
description = ''
additional disk space to be added to the image if diskSize "auto"
is used.
'';
};
bootSize = mkOption {
type = types.str;
default = "256M";
example = "512M";
description = ''
Size of the boot partition. Is only used if partitionTableType is
either "efi" or "hybrid".
'';
};
diskSize = mkOption {
type = types.str;
default = "auto";
example = "20480";
description = ''
The size of the disk, in megabytes.
if "auto" size is calculated based on the contents copied to it and
additionalSpace is taken into account.
'';
};
net0 = mkOption {
type = types.commas;
default = "virtio=00:00:00:00:00:00,bridge=vmbr0,firewall=1";
description = ''
Configuration for the default interface. When restoring from VMA, check the
"unique" box to ensure device mac is randomized.
'';
};
serial0 = mkOption {
type = types.str;
default = "socket";
example = "/dev/ttyS0";
description = ''
Create a serial device inside the VM (n is 0 to 3), and pass through a host serial device (i.e. /dev/ttyS0),
or create a unix socket on the host side (use qm terminal to open a terminal connection).
'';
};
agent = mkOption {
type = types.bool;
apply = x: if x then "1" else "0";
default = true;
description = ''
Expect guest to have qemu agent running
'';
};
};
qemuExtraConf = mkOption {
type = with types; attrsOf (oneOf [ str int ]);
default = {};
example = literalExpression ''
{
cpu = "host";
onboot = 1;
}
'';
description = ''
Additional options appended to qemu-server.conf
'';
};
partitionTableType = mkOption {
type = types.enum [ "efi" "hybrid" "legacy" "legacy+gpt" ];
description = ''
Partition table type to use. See make-disk-image.nix partitionTableType for details.
Defaults to 'legacy' for 'proxmox.qemuConf.bios="seabios"' (default), other bios values defaults to 'efi'.
Use 'hybrid' to build grub-based hybrid bios+efi images.
'';
default = if config.proxmox.qemuConf.bios == "seabios" then "legacy" else "efi";
defaultText = lib.literalExpression ''if config.proxmox.qemuConf.bios == "seabios" then "legacy" else "efi"'';
example = "hybrid";
};
filenameSuffix = mkOption {
type = types.str;
default = config.proxmox.qemuConf.name;
example = "999-nixos_template";
description = ''
Filename of the image will be vzdump-qemu-''${filenameSuffix}.vma.zstd.
This will also determine the default name of the VM on restoring the VMA.
Start this value with a number if you want the VMA to be detected as a backup of
any specific VMID.
'';
};
};
config = let
cfg = config.proxmox;
cfgLine = name: value: ''
${name}: ${builtins.toString value}
'';
virtio0Storage = builtins.head (builtins.split ":" cfg.qemuConf.virtio0);
cfgFile = fileName: properties: pkgs.writeTextDir fileName ''
# generated by NixOS
${lib.concatStrings (lib.mapAttrsToList cfgLine properties)}
#qmdump#map:virtio0:drive-virtio0:${virtio0Storage}:raw:
'';
inherit (cfg) partitionTableType;
supportEfi = partitionTableType == "efi" || partitionTableType == "hybrid";
supportBios = partitionTableType == "legacy" || partitionTableType == "hybrid" || partitionTableType == "legacy+gpt";
hasBootPartition = partitionTableType == "efi" || partitionTableType == "hybrid";
hasNoFsPartition = partitionTableType == "hybrid" || partitionTableType == "legacy+gpt";
in {
assertions = [
{
assertion = config.boot.loader.systemd-boot.enable -> config.proxmox.qemuConf.bios == "ovmf";
message = "systemd-boot requires 'ovmf' bios";
}
{
assertion = partitionTableType == "efi" -> config.proxmox.qemuConf.bios == "ovmf";
message = "'efi' disk partitioning requires 'ovmf' bios";
}
{
assertion = partitionTableType == "legacy" -> config.proxmox.qemuConf.bios == "seabios";
message = "'legacy' disk partitioning requires 'seabios' bios";
}
{
assertion = partitionTableType == "legacy+gpt" -> config.proxmox.qemuConf.bios == "seabios";
message = "'legacy+gpt' disk partitioning requires 'seabios' bios";
}
];
system.build.VMA = import ../../lib/make-disk-image.nix {
name = "proxmox-${cfg.filenameSuffix}";
inherit (cfg) partitionTableType;
postVM = let
# Build qemu with PVE's patch that adds support for the VMA format
vma = (pkgs.qemu_kvm.override {
alsaSupport = false;
pulseSupport = false;
sdlSupport = false;
jackSupport = false;
gtkSupport = false;
vncSupport = false;
smartcardSupport = false;
spiceSupport = false;
ncursesSupport = false;
libiscsiSupport = false;
tpmSupport = false;
numaSupport = false;
seccompSupport = false;
guestAgentSupport = false;
}).overrideAttrs ( super: rec {
version = "7.2.1";
src = pkgs.fetchurl {
url= "https://download.qemu.org/qemu-${version}.tar.xz";
sha256 = "sha256-jIVpms+dekOl/immTN1WNwsMLRrQdLr3CYqCTReq1zs=";
};
patches = [
# Proxmox' VMA tool is published as a particular patch upon QEMU
(pkgs.fetchpatch {
url =
let
rev = "abb04bb6272c1202ca9face0827917552b9d06f6";
path = "debian/patches/pve/0027-PVE-Backup-add-vma-backup-format-code.patch";
in "https://git.proxmox.com/?p=pve-qemu.git;a=blob_plain;hb=${rev};f=${path}";
hash = "sha256-3d0HHdvaExCry6zcULnziYnWIAnn24vECkI4sjj2BMg=";
})
# Proxmox' VMA tool uses O_DIRECT which fails on tmpfs
# Filed to upstream issue tracker: https://bugzilla.proxmox.com/show_bug.cgi?id=4710
(pkgs.writeText "inline.patch" ''
--- a/vma-writer.c 2023-05-01 15:11:13.361341177 +0200
+++ b/vma-writer.c 2023-05-01 15:10:51.785293129 +0200
@@ -306,7 +306,7 @@
/* try to use O_NONBLOCK */
fcntl(vmaw->fd, F_SETFL, fcntl(vmaw->fd, F_GETFL)|O_NONBLOCK);
} else {
- oflags = O_NONBLOCK|O_DIRECT|O_WRONLY|O_EXCL;
+ oflags = O_NONBLOCK|O_WRONLY|O_EXCL;
vmaw->fd = qemu_create(filename, oflags, 0644, errp);
}
'')
];
buildInputs = super.buildInputs ++ [ pkgs.libuuid ];
nativeBuildInputs = super.nativeBuildInputs ++ [ pkgs.perl ];
});
in
''
${vma}/bin/vma create "vzdump-qemu-${cfg.filenameSuffix}.vma" \
-c ${cfgFile "qemu-server.conf" (cfg.qemuConf // cfg.qemuExtraConf)}/qemu-server.conf drive-virtio0=$diskImage
rm $diskImage
${pkgs.zstd}/bin/zstd "vzdump-qemu-${cfg.filenameSuffix}.vma"
mv "vzdump-qemu-${cfg.filenameSuffix}.vma.zst" $out/
mkdir -p $out/nix-support
echo "file vma $out/vzdump-qemu-${cfg.filenameSuffix}.vma.zst" >> $out/nix-support/hydra-build-products
'';
inherit (cfg.qemuConf) additionalSpace diskSize bootSize;
format = "raw";
inherit config lib pkgs;
};
boot = {
growPartition = true;
kernelParams = [ "console=ttyS0" ];
loader.grub = {
device = lib.mkDefault (if (hasNoFsPartition || supportBios) then
# Even if there is a separate no-fs partition ("/dev/disk/by-partlabel/no-fs" i.e. "/dev/vda2"),
# which will be used the bootloader, do not set it as loader.grub.device.
# GRUB installation fails, unless the whole disk is selected.
"/dev/vda"
else
"nodev");
efiSupport = lib.mkDefault supportEfi;
efiInstallAsRemovable = lib.mkDefault supportEfi;
};
loader.timeout = 0;
initrd.availableKernelModules = [ "uas" "virtio_blk" "virtio_pci" ];
};
fileSystems."/" = {
device = "/dev/disk/by-label/nixos";
autoResize = true;
fsType = "ext4";
};
fileSystems."/boot" = lib.mkIf hasBootPartition {
device = "/dev/disk/by-label/ESP";
fsType = "vfat";
};
services.qemuGuest.enable = lib.mkDefault true;
};
}
|
