cluster/services/hercules-ci-multi-agent: limit cores for Nix

cluster/services/hercules-ci-multi-agent/common.nix

@@ -1,4 +1,4 @@
-{ cluster, depot, lib, ... }:
+{ cluster, config, depot, lib, ... }:
 
 let
   inherit (cluster.config.services.hercules-ci-multi-agent) nodes secrets;
@@ -40,8 +40,19 @@ in
     settings = {
       clusterJoinTokenPath = secrets."clusterJoinToken-${org}".path;
       binaryCachesPath = secrets.cacheConfig.path;
+      concurrentTasks = lib.pipe config.reflection.hardware.cpu.cores [
+        (lib.flip builtins.div 2)
+        builtins.floor
+        (lib.max 2)
+      ];
     };
   });
 
+  nix.settings.cores = lib.pipe config.reflection.hardware.cpu.cores [
+    (builtins.mul 0.75)
+    builtins.floor
+    (lib.max 1)
+  ];
+
   users.groups.hercules-ci-agent.members = map (org: "hci-${org}") (lib.attrNames nodes);
 }

hosts/VEGAS/default.nix

@@ -16,6 +16,11 @@ tools: rec {
     };
   };
 
+  hardware = {
+    cpu.cores = 8;
+    memory.gb = 64;
+  };
+
   hyprspace = {
     enable = true;
     id = "QmYs4xNBby2fTs8RnzfXEk161KD4mftBfCiR8yXtgGPj4J";

hosts/checkmate/default.nix

@@ -17,6 +17,11 @@ tools: rec {
     };
   };
 
+  hardware = {
+    cpu.cores = 1;
+    memory.gb = 1;
+  };
+
   hyprspace = {
     enable = true;
     id = "12D3KooWL84sAtq1QTYwb7gVbhSNX5ZUfVt4kgYKz8pdif1zpGUh";

hosts/grail/default.nix

@@ -16,6 +16,11 @@ tools: rec {
     };
   };
 
+  hardware = {
+    cpu.cores = 4;
+    memory.gb = 8;
+  };
+
   hyprspace = {
     enable = true;
     id = "12D3KooWN31twBvdEcxz2jTv4tBfPe3mkNueBwDJFCN4xn7ZwFbi";

hosts/options/default.nix

@@ -9,6 +9,7 @@ let
       ./hour/interfaces.nix
       ./hour/nixos.nix
       ./hour/ssh.nix
+      ./hour/hardware.nix
     ];
   };
 

hosts/options/hour/hardware.nix

@@ -0,0 +1,18 @@
+{ lib, ... }:
+with lib;
+
+{
+  options.hardware = {
+    cpu = {
+      cores = mkOption {
+        type = types.ints.unsigned;
+      };
+    };
+    memory = {
+      gb = mkOption {
+        type = types.ints.unsigned;
+      };
+    };
+  };
+}
+

hosts/prophet/default.nix

@@ -17,6 +17,11 @@ tools: rec {
     };
   };
 
+  hardware = {
+    cpu.cores = 4;
+    memory.gb = 24;
+  };
+
   hyprspace = {
     enable = true;
     id = "QmbrAHuh4RYcyN9fWePCZMVmQjbaNXtyvrDCWz4VrchbXh";

hosts/thunderskin/default.nix

@@ -17,6 +17,11 @@ tools: rec {
     };
   };
 
+  hardware = {
+    cpu.cores = 1;
+    memory.gb = 1;
+  };
+
   hyprspace = {
     enable = true;
     id = "12D3KooWB9AUPorFoACkWbphyargRBV9osJsYuQDumtQ85j7Aqmg";