71 lines
1.7 KiB
Nix
71 lines
1.7 KiB
Nix
{
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options,
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config,
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lib,
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pkgs,
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...
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}:
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let
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mkIfGuest = import ../lib/mkIfMicrovmGuest.nix { inherit options config lib; };
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inherit (lib) types;
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in
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{
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imports = [
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./vsock-connect-guest.nix
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./uvms-users.nix
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];
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options = {
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uvms.zswap.enable = lib.mkEnableOption "Pass zswap.enabled=1 to kernelParams (and disable zramSwap)";
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uvms.zswap.settings = lib.mkOption {
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description = "Zswap kernel module configuration";
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type = types.submodule {
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freeformType = types.attrsOf types.str;
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options.max_pool_percent = lib.mkOption {
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type = types.int;
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default = 25;
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description = "...";
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};
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options.compressor = lib.mkOption {
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type = types.str;
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default = "zstd";
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description = "...";
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};
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};
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};
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};
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config = lib.mkMerge [
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(mkIfGuest {
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microvm = {
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hypervisor = "cloud-hypervisor";
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volumes = [
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{
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image = "swapfile.img";
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mountPoint = "/var/swapfiles";
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size = 1024;
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}
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];
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};
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swapDevices = [
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{
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device = "/var/swapfiles/swap0";
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size = 768;
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}
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];
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systemd.services."microvm@".serviceConfig.ExecStartPost = [
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(pkgs.writeShellScript "microvm-fix-umask" ''
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if [[ -e vsock.sock ]] ; then
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chmod g+rw vsock.sock
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fi
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'')
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];
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})
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(lib.mkIf config.uvms.zswap.enable {
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zramSwap.enable = false;
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boot.kernelParams =
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builtins.attrValues ((lib.mapAttrs (
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name: value: "zswap.${name}=${toString value}"
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)) config.uvms.zswap.settings)
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++ [ "zswap.enabled=1" ];
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})
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];
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}
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