Install kubernetes.

nix/kubernetes/roles/kubernetes/default.nix

@@ -0,0 +1,53 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  options.me = {
+    kubernetes.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install kubernetes.";
+    };
+  };
+
+  config = lib.mkIf config.me.kubernetes.enable {
+    environment.systemPackages = with pkgs; [
+      kubernetes
+    ];
+
+    systemd.targets.kubernetes = {
+      description = "Kubernetes";
+      wantedBy = [ "multi-user.target" ];
+    };
+
+    users.users.kubernetes = {
+      uid = 10024;
+      description = "Kubernetes";
+      group = "kubernetes";
+      home = "/var/lib/kubernetes";
+      createHome = true;
+      homeMode = "755";
+      isSystemUser = true;
+    };
+    users.groups.kubernetes.gid = 10024;
+
+    environment.persistence."/persist" = lib.mkIf (config.me.mountPersistence) {
+      hideMounts = true;
+      directories = [
+        {
+          directory = "/var/lib/kubernetes";
+          user = "kubernetes";
+          group = "kubernetes";
+          mode = "0755";
+        }
+      ];
+    };
+  };
+}