{
  config,
  lib,
  pkgs,
  ...
}:

let
  # shellCommand = cmd: (lib.concatMapStringsSep " " lib.strings.escapeShellArg cmd);
  shellCommand = cmd: (builtins.concatStringsSep " " cmd);
  settingsFormat = pkgs.formats.yaml { };
  config_file = settingsFormat.generate "kubelet-config.yaml" config.me.kubelet.settings;
in
{
  imports = [ ];

  options.me = {
    kubelet.enable = lib.mkOption {
      type = lib.types.bool;
      default = false;
      example = true;
      description = "Whether we want to install kubelet.";
    };

    kubelet.settings = lib.mkOption {
      type = settingsFormat.type;
      default = {
        kind = "KubeletConfiguration";
        apiVersion = "kubelet.config.k8s.io/v1beta1";
        address = "0.0.0.0";
        authentication = {
          anonymous = {
            enabled = false;
          };
          webhook = {
            enabled = true;
          };
          x509 = {
            clientCAFile = "/var/lib/kubelet/ca.crt";
          };
        };
        authorization = {
          mode = "Webhook";
        };
        cgroupDriver = "systemd";
        containerRuntimeEndpoint = "unix:///var/run/containerd/containerd.sock";
        enableServer = true;
        failSwapOn = false;
        maxPods = 16;
        memorySwap = {
          swapBehavior = "NoSwap";
        };
        port = 10250;
        resolvConf = "/etc/resolv.conf";
        registerNode = true;
        runtimeRequestTimeout = "15m";
        tlsCertFile = "/var/lib/kubelet/kubelet.crt";
        tlsPrivateKeyFile = "/var/lib/kubelet/kubelet.key";
      };
      description = ''
        kubelet-config.yaml
      '';
    };
  };

  config = lib.mkIf config.me.kubelet.enable {
    systemd.services.kubelet = {
      enable = true;
      description = "Kubernetes Kubelet";
      documentation = [ "https://github.com/kubernetes/kubernetes" ];
      wantedBy = [ "kubernetes.target" ];
      after = [ "containerd.service" ];
      requires = [ "containerd.service" ];
      # path = with pkgs; [
      #   zfs
      # ];
      unitConfig.DefaultDependencies = "no";
      serviceConfig = {
        ExecStart = (
          shellCommand [
            "${pkgs.kubernetes}/bin/kubelet"
            # "--config=${config_file}"
            "--config=${./files/kubelet-config.yaml}"
            "--kubeconfig=/.persist/keys/kube/kubeconfig"
            "--v=2"
          ]
        );
        Restart = "on-failure";
        RestartSec = 5;
        # ConfigurationDirectory = "kubernetes";
        # CPUAccounting = "true";
        # IPAccounting = "true";
        # KillMode = "process";
        # MemoryAccounting = "true";
        # StartLimitInterval = 0;
        # RuntimeDirectory = "kubelet";
        # StateDirectory = "kubelet";
      };
    };
  };
}