nixos/slurm: enable munge by default, added note to slurm description

nixos/modules/services/computing/slurm/slurm.nix

@@ -32,12 +32,20 @@ in
     services.slurm = {
 
       server = {
-        enable = mkEnableOption "slurm control daemon";
-
+        enable = mkOption {
+          type = types.bool;
+          default = false;
+          description = ''
+            Wether to enable the slurm control daemon.
+            Note that the standard authentication method is "munge".
+            The "munge" service needs to be provided with a password file in order for
+            slurm to work properly (see <literal>services.munge.password<literal>).
+          '';
+        };
       };
 
       client = {
-        enable = mkEnableOption "slurm rlient daemon";
+        enable = mkEnableOption "slurm client daemon";
 
       };
 
@@ -161,6 +169,8 @@ in
 
     environment.systemPackages = [ wrappedSlurm ];
 
+    services.munge.enable = mkDefault true;
+
     systemd.services.slurmd = mkIf (cfg.client.enable) {
       path = with pkgs; [ wrappedSlurm coreutils ]
         ++ lib.optional cfg.enableSrunX11 slurm-spank-x11;

nixos/tests/slurm.nix

@@ -20,7 +20,6 @@ in {
         # TODO slrumd port and slurmctld port should be configurations and
         # automatically allowed by the  firewall.
         networking.firewall.enable = false;
-        services.munge.enable = true;
         services.slurm = slurmconfig;
       };
     in {
@@ -28,7 +27,6 @@ in {
       { config, pkgs, ...}:
       {
         networking.firewall.enable = false;
-        services.munge.enable = true;
         services.slurm = {
           server.enable = true;
         } // slurmconfig;