base/nixos-exporter: listen on own server block

base/default.nix

@@ -1,4 +1,9 @@
-{ pkgs, lib, fp, ... }:
+{
+  pkgs,
+  lib,
+  fp,
+  ...
+}:
 
 {
   imports = [
@@ -8,6 +13,7 @@
     ./networking.nix
     ./nix.nix
     ./vm.nix
+    ./flake-input-exporter.nix
 
     ./services/acme.nix
     ./services/uptimed.nix
@@ -57,11 +63,11 @@
   # home-manager usually handles this for you: https://github.com/nix-community/home-manager/blob/22a36aa709de7dd42b562a433b9cefecf104a6ee/modules/programs/bash.nix#L203-L209
   # btw, programs.bash.shellInit just goes into environment.shellInit which in turn goes into /etc/profile, spooky shit
   programs.bash.shellInit = ''
-   if [ -n "''${BASH_VERSION:-}" ]; then
-     if [[ ! -f ~/.bash_profile && ! -f ~/.bash_login ]]; then
-      [[ -f ~/.bashrc ]] && . ~/.bashrc
-     fi
-   fi
+    if [ -n "''${BASH_VERSION:-}" ]; then
+      if [[ ! -f ~/.bash_profile && ! -f ~/.bash_login ]]; then
+       [[ -f ~/.bashrc ]] && . ~/.bashrc
+      fi
+    fi
   '';
 
   programs.zsh.enable = true;

base/flake-input-exporter.nix

@@ -0,0 +1,53 @@
+{
+  config,
+  inputs,
+  lib,
+  pkgs,
+  values,
+  ...
+}:
+let
+  data = lib.flip lib.mapAttrs inputs (
+    name: input: {
+      inherit (input)
+        lastModified
+        ;
+    }
+  );
+  folder = pkgs.writeTextDir "share/flake-inputs" (
+    lib.concatMapStringsSep "\n" (
+      { name, value }: ''nixos_last_modified_input{flake="${name}"} ${toString value.lastModified}''
+    ) (lib.attrsToList data)
+  );
+  port = 9102;
+in
+{
+  services.nginx.virtualHosts."${config.networking.fqdn}-nixos-metrics" = {
+    serverName = config.networking.fqdn;
+    serverAliases = [
+      "${config.networking.hostName}.pvv.org"
+    ];
+    locations."/metrics" = {
+      root = "${folder}/share";
+      tryFiles = "/flake-inputs =404";
+      extraConfig = ''
+        default_type text/plain;
+      '';
+    };
+    listen = [
+      {
+        inherit port;
+        addr = "0.0.0.0";
+      }
+    ];
+    extraConfig = ''
+      allow ${values.hosts.ildkule.ipv4}/32;
+      allow ${values.hosts.ildkule.ipv6}/32;
+      allow 129.241.210.128/25;
+      allow 2001:700:300:1900::/64;
+      deny all;
+    '';
+  };
+
+  networking.firewall.allowedTCPPorts = [ port ];
+}

flake.lock

@@ -48,11 +48,11 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1758386174,
-        "narHash": "sha256-iNDxHSDdb/LlqDbqP9BcZd1QEmks4iYiyN34UhUizZ8=",
+        "lastModified": 1758919016,
+        "narHash": "sha256-TSJMOWq9dO7P1iQB4httzWwAtpM1veacLcaS7FAyTpo=",
         "ref": "refs/heads/main",
-        "rev": "a21fdfe56743afc7de1fb14597711fbd97ddef76",
-        "revCount": 50,
+        "rev": "c87263b784954d20485d108e70934c9316935d75",
+        "revCount": 51,
         "type": "git",
         "url": "https://git.pvv.ntnu.no/Grzegorz/greg-ng.git"
       },
@@ -159,11 +159,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1758363343,
-        "narHash": "sha256-TWem5ajoX0vD7j1v/cg3XU7GHWW10HRUQbZL++QNXLk=",
-        "rev": "b2a3852bd078e68dd2b3dfa8c00c67af1f0a7d20",
+        "lastModified": 1760181981,
+        "narHash": "sha256-xDZe6SFMbTcnDIdcYixiDgAEuk95qamQqSQN2AHwH3A=",
+        "rev": "848c3a9fbba628987c98256fa34c6e2927ee1bde",
         "type": "tarball",
-        "url": "https://releases.nixos.org/nixos/25.05-small/nixos-25.05.810175.b2a3852bd078/nixexprs.tar.xz"
+        "url": "https://releases.nixos.org/nixos/25.05-small/nixos-25.05.811127.848c3a9fbba6/nixexprs.tar.xz"
       },
       "original": {
         "type": "tarball",
@@ -172,11 +172,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1758361324,
-        "narHash": "sha256-uCqhgJlmxP3UmyCNZ21ucc5Ic0I2le3rA7+Q61UH1YA=",
-        "rev": "0f3383ef02bc092d2f82afa4e556743c6e6b74d6",
+        "lastModified": 1760170014,
+        "narHash": "sha256-oP2fv8Vl0sYauPVmIFwMnNl0Nw8+ZJ2Cm1vaeS9t1to=",
+        "rev": "e18d8ec6fafaed55561b7a1b54eb1c1ce3ffa2c5",
         "type": "tarball",
-        "url": "https://releases.nixos.org/nixos/unstable-small/nixos-25.11pre864278.0f3383ef02bc/nixexprs.tar.xz"
+        "url": "https://releases.nixos.org/nixos/unstable-small/nixos-25.11pre875961.e18d8ec6fafa/nixexprs.tar.xz"
       },
       "original": {
         "type": "tarball",
@@ -268,11 +268,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1758007585,
-        "narHash": "sha256-HYnwlbY6RE5xVd5rh0bYw77pnD8lOgbT4mlrfjgNZ0c=",
+        "lastModified": 1760240450,
+        "narHash": "sha256-sa9bS9jSyc4vH0jSWrUsPGdqtMvDwmkLg971ntWOo2U=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "f77d4cfa075c3de66fc9976b80e0c4fc69e2c139",
+        "rev": "41fd1f7570c89f645ee0ada0be4e2d3c4b169549",
         "type": "github"
       },
       "original": {

hosts/ildkule/services/monitoring/prometheus/machines.nix

@@ -8,25 +8,26 @@
 
   defaultNodeExporterPort = 9100;
   defaultSystemdExporterPort = 9101;
+  defaultNixosExporterPort = 9102;
 in {
   services.prometheus.scrapeConfigs = [{
     job_name = "base_info";
     static_configs = [
-      (mkHostScrapeConfig "ildkule" [ cfg.exporters.node.port cfg.exporters.systemd.port ])
+      (mkHostScrapeConfig "ildkule" [ cfg.exporters.node.port cfg.exporters.systemd.port defaultNixosExporterPort ])
 
-      (mkHostScrapeConfig "bekkalokk" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "bicep" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "brzeczyszczykiewicz" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "georg" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "kommode" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "ustetind" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "wenche" [ defaultNodeExporterPort defaultSystemdExporterPort ])
+      (mkHostScrapeConfig "bekkalokk" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "bicep" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "brzeczyszczykiewicz" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "georg" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "kommode" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "ustetind" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "wenche" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
 
-      (mkHostScrapeConfig "lupine-1" [ defaultNodeExporterPort defaultSystemdExporterPort ])
+      (mkHostScrapeConfig "lupine-1" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
       # (mkHostScrapeConfig "lupine-2" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "lupine-3" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "lupine-4" [ defaultNodeExporterPort defaultSystemdExporterPort ])
-      (mkHostScrapeConfig "lupine-5" [ defaultNodeExporterPort defaultSystemdExporterPort ])
+      (mkHostScrapeConfig "lupine-3" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "lupine-4" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
+      (mkHostScrapeConfig "lupine-5" [ defaultNodeExporterPort defaultSystemdExporterPort defaultNixosExporterPort ])
 
       (mkHostScrapeConfig "hildring" [ defaultNodeExporterPort ])
       (mkHostScrapeConfig "isvegg" [ defaultNodeExporterPort ])