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nixos/vms: Add disk support

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This commit is contained in:
Jack O'Sullivan 2022-05-07 17:27:12 +01:00
parent 1a61c9e1b2
commit a907ae428f
3 changed files with 39 additions and 8 deletions
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17
nixos/boxes/colony.nix
View File

@ -4,7 +4,7 @@
nixpkgs = "mine";
home-manager = "unstable";
configuration = { lib, pkgs, modulesPath, config, ... }:
configuration = { lib, pkgs, modulesPath, config, systems, ... }:
let
inherit (lib) mkIf;
in
@ -40,7 +40,20 @@
vms = {
instances.test = {
networks.virtual = {};
vga = "none";
drives = {
disk = {
backend = {
driver = "file";
filename = "${systems.installer.configuration.config.my.buildAs.iso}/iso/nixos.iso";
read-only = "on";
};
format.driver = "raw";
frontend = "ide-cd";
frontendOpts = {
bootindex = 0;
};
};
};
};
};
};

4
nixos/installer.nix
View File

@ -1,7 +1,7 @@
{
nixos.systems.installer = {
system = "x86_64-linux";
nixpkgs = "unstable";
nixpkgs = "mine";
docCustom = false;
configuration =
@ -21,7 +21,7 @@
config = {
my = {
# Whatever installer mechanism is chosen will provied an appropriate `/`
# Whatever installer mechanism is chosen will provide an appropriate `/`
tmproot.enable = false;
firewall.nat.enable = false;
deploy.enable = false;

26
nixos/modules/vms.nix
View File

@ -22,6 +22,18 @@ let
};
};
driveOpts = with lib.types; {
options = {
backend = mkOpt' qemuOpts { } "Backend blockdev options.";
format = mkOpt' qemuOpts { } "Format blockdev options.";
formatBackendProp = mkOpt' str "file" "Property that references the backend blockdev.";
frontend = mkOpt' str "virtio-blk" "Frontend device driver.";
frontendOpts = mkOpt' qemuOpts { } "Frontend device options.";
};
};
vmOpts = with lib.types; { name, ... }: {
options = {
qemuBin = mkOpt' path "${pkgs.qemu_kvm}/bin/qemu-kvm" "Path to QEMU executable.";
@ -40,6 +52,7 @@ let
vga = mkOpt' str "qxl" "VGA card type.";
spice.enable = mkBoolOpt' true "Whether to enable SPICE.";
networks = mkOpt' (attrsOf (submodule netOpts)) { } "Networks to attach VM to.";
drives = mkOpt' (attrsOf (submodule driveOpts)) { } "Drives to attach to VM.";
};
};
@ -61,15 +74,20 @@ let
"device isa-serial,chardev=tty"
] ++
(optional i.enableKVM "enable-kvm") ++
(optionals i.enableUEFI [
"drive if=pflash,format=raw,unit=0,readonly=on,file=${cfg.ovmfPackage.fd}/FV/OVMF_CODE.fd"
"drive if=pflash,format=raw,unit=1,file=/var/lib/vms/${n}/ovmf_vars.bin"
]) ++
(optional i.spice.enable "spice unix=on,addr=/run/vms/${n}/spice.sock,disable-ticketing=on") ++
(flatten (mapAttrsToList (nn: c: [
"netdev bridge,id=${nn},br=${c.bridge}"
("device ${c.model},netdev=${nn}" + (extraQEMUOpts c.extraOptions))
]) i.networks)) ++
(optionals i.enableUEFI [
"drive if=pflash,format=raw,unit=0,readonly=on,file=${cfg.ovmfPackage.fd}/FV/OVMF_CODE.fd"
"drive if=pflash,format=raw,unit=1,file=/var/lib/vms/${n}/ovmf_vars.bin"
]);
(flatten (mapAttrsToList (dn: c: [
"blockdev node-name=${dn}-backend,${c.backend}"
"blockdev node-name=${dn}-format,${c.formatBackendProp}=${dn}-backend,${c.format}"
("device ${c.frontend},id=${dn},drive=${dn}-format" + (extraQEMUOpts c.frontendOpts))
]) i.drives));
args = map (v: "-${v}") flags;
in
concatStringsSep " " ([ i.qemuBin ] ++ args);