modules/nixos: add cgroups and exporter

nix-community · Sep 24, 2024 · ec18abd · ec18abd
1 parent b6d45e9
commit ec18abd
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Showing 5 changed files with 59 additions and 0 deletions.
diff --git a/flake.lock b/flake.lock
diff --git a/flake.nix b/flake.nix
@@ -16,6 +16,8 @@
     buildbot-nix.inputs.nixpkgs.follows = "nixpkgs";
     buildbot-nix.inputs.treefmt-nix.follows = "treefmt-nix";
     buildbot-nix.url = "github:nix-community/buildbot-nix";
+    cgroup-exporter.inputs.nixpkgs.follows = "nixpkgs";
+    cgroup-exporter.url = "github:arianvp/cgroup-exporter";
     comin.inputs.nixpkgs.follows = "nixpkgs";
     comin.url = "github:nlewo/comin/d3658c452024824235de2355ac3e156b10c3eaaf";
     disko.inputs.nixpkgs.follows = "nixpkgs";
@@ -156,6 +158,7 @@
       flake.nixosModules = {
         buildbot = ./modules/nixos/buildbot.nix;
         builder = ./modules/nixos/builder.nix;
+        cgroups = ./modules/nixos/cgroups.nix;
         community-builder = ./modules/nixos/community-builder;
         disko-zfs = ./modules/nixos/disko-zfs.nix;
         github-org-backup = ./modules/nixos/github-org-backup.nix;

diff --git a/hosts/build03/default.nix b/hosts/build03/default.nix
@@ -6,6 +6,7 @@
     inputs.self.nixosModules.disko-zfs
     inputs.self.nixosModules.buildbot
     inputs.self.nixosModules.builder
+    inputs.self.nixosModules.cgroups
     inputs.self.nixosModules.hercules-ci
     inputs.self.nixosModules.watch-store
     ./builders.nix

diff --git a/hosts/build04/default.nix b/hosts/build04/default.nix
@@ -4,6 +4,7 @@
     inputs.srvos.nixosModules.hardware-hetzner-online-arm
     inputs.self.nixosModules.disko-zfs
     inputs.self.nixosModules.builder
+    inputs.self.nixosModules.cgroups
     inputs.self.nixosModules.hercules-ci
     inputs.self.nixosModules.remote-builder
   ];

diff --git a/modules/nixos/cgroups.nix b/modules/nixos/cgroups.nix
@@ -0,0 +1,33 @@
+{
+  config,
+  inputs,
+  pkgs,
+  ...
+}:
+{
+  imports = [
+    inputs.cgroup-exporter.nixosModules.default
+  ];
+
+  services.prometheus.exporters.cgroup.enable = true;
+
+  services.telegraf.extraConfig.inputs.prometheus.urls = [
+    "http://localhost:${toString config.services.prometheus.exporters.cgroup.port}/metrics"
+  ];
+
+  nix = {
+    #package = pkgs.nixVersions.nix_2_25;
+
+    settings = {
+      experimental-features = [
+        "auto-allocate-uids"
+        "cgroups"
+      ];
+
+      system-features = [ "uid-range" ];
+
+      auto-allocate-uids = true;
+      use-cgroups = true;
+    };
+  };
+}