nimbus-validator: Init module.

Author: catwith1hat

modules/default.nix

@@ -20,6 +20,7 @@
       ./restore
       ./reth
       ./nimbus
+      ./nimbus-validator
     ];
   };
 }

modules/nimbus-validator/default.nix

@@ -0,0 +1,55 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit
+    (lib)
+    mapAttrs'
+    mkIf
+    mkMerge
+    nameValuePair
+    ;
+
+  modulesLib = import ../lib.nix lib;
+  inherit (modulesLib) baseServiceConfig;
+
+  eachNimbusValidator = config.services.ethereum.nimbus-validator;
+in {
+  ###### interface
+  inherit (import ./options.nix {inherit lib pkgs;}) options;
+
+  ###### implementation
+
+  config = mkIf (eachNimbusValidator != {}) {
+    # create a service for each instance
+    systemd.services =
+      mapAttrs' (
+        nimbusValidatorName: let
+          serviceName = "nimbus-validator-${nimbusValidatorName}";
+        in
+          cfg:
+            nameValuePair serviceName (mkIf cfg.enable {
+              after = ["network.target"];
+              wantedBy = ["multi-user.target"];
+              description = "Nimbus Validator Client (${nimbusValidatorName})";
+
+              # create service config by merging with the base config
+              serviceConfig = mkMerge [
+                baseServiceConfig
+                {
+                  User =
+                    if cfg.user != null
+                    then cfg.user
+                    else serviceName;
+                  StateDirectory = serviceName;
+                  ExecStart = "${cfg.package}/bin/nimbus_validator_client ${lib.escapeShellArgs cfg.extraArgs}";
+                  MemoryDenyWriteExecute = "false";
+                }
+              ];
+            })
+      )
+      eachNimbusValidator;
+  };
+}

modules/nimbus-validator/options.nix

@@ -0,0 +1,36 @@
+{
+  lib,
+  pkgs,
+  ...
+}: let
+  nimbusValidatorOpts = with lib; {
+    options = {
+      enable = mkEnableOption "Nimbus Validator Client.";
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.nimbus;
+        defaultText = literalExpression "pkgs.nimbus";
+        description = "Package to use as Nimbus Validator Client.";
+      };
+
+      extraArgs = mkOption {
+        type = types.listOf types.str;
+        description = "Additional arguments to pass to Nimbus Validator Client.";
+        default = [];
+      };
+
+      user = mkOption {
+        type = types.nullOr types.str;
+        description = "Service user";
+      };
+    };
+  };
+in {
+  options.services.ethereum.nimbus-validator = with lib;
+    mkOption {
+      type = types.attrsOf (types.submodule nimbusValidatorOpts);
+      default = {};
+      description = "Specification of one or more Nimbus Validator Client instances.";
+    };
+}