From eb3094369e1a2bb437ffb6fe19949ee945286382 Mon Sep 17 00:00:00 2001
From: Tristan <tristan@tristans.cloud>
Date: Sun, 22 Jun 2025 16:36:33 +0100
Subject: [PATCH] alpine: fix node exporter dashboard

---
 nixos/services/grafana.nix    | 6 ++++--
 nixos/services/prometheus.nix | 4 ++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/nixos/services/grafana.nix b/nixos/services/grafana.nix
index 353bbc8..9bfb549 100644
--- a/nixos/services/grafana.nix
+++ b/nixos/services/grafana.nix
@@ -5,9 +5,9 @@
     name = "dashboards";
     paths = map mkDashboard dashboards;
   };
-  mkDashboard = {name, url, sha256}: pkgs.writeTextFile {
+  mkDashboard = {name, url, sha256, patch ? lib.id}: pkgs.writeTextFile {
     inherit name;
-    text = builtins.readFile ( builtins.fetchurl {inherit url sha256;} );
+    text = patch (builtins.readFile ( builtins.fetchurl {inherit url sha256;} ));
     destination = "/dash/${name}.json";
   };
 in {
@@ -42,6 +42,8 @@ in {
         name = "node-exporter";
         url = "https://grafana.com/api/dashboards/1860/revisions/37/download";
         sha256 = "sha256:0qza4j8lywrj08bqbww52dgh2p2b9rkhq5p313g72i57lrlkacfl";
+        # https://github.com/rfmoz/grafana-dashboards/issues/169
+        patch = builtins.replaceStrings ["$__rate_interval"] ["$__range"];
       }
       {
         name = "synapse";
diff --git a/nixos/services/prometheus.nix b/nixos/services/prometheus.nix
index 9e18f22..8581e70 100644
--- a/nixos/services/prometheus.nix
+++ b/nixos/services/prometheus.nix
@@ -2,8 +2,8 @@
   inherit (config.services) prometheus;
   nodes = [
     "alpine"
-    "100.106.49.128"
-    "zenix"
+    "100.106.49.128" # laptop
+    "100.65.29.110" # gaming pc
   ];
   addPort = ip: "${ip}:${toString prometheus.exporters.node.port}";
 in {