working with nix

lib/status.nix

@@ -0,0 +1,59 @@
+{ pkgs, lib, ... }:
+services:
+pkgs.writers.writeJSON "status.json" {
+  title = "Service Status";
+  panels = map (
+    { name, service }:
+    {
+      datasource = {
+        type = "prometheus";
+        uid = "prometheus";
+      };
+      fieldConfig = {
+        defaults = {
+          color = {
+            mode = "thresholds";
+          };
+          mappings = [
+            {
+              options = {
+                "0" = {
+                  color = "red";
+                  index = 1;
+                  text = "Failed";
+                };
+                "1" = {
+                  color = "green";
+                  index = 0;
+                  text = "Running";
+                };
+              };
+              type = "value";
+            }
+          ];
+          thresholds = {
+            mode = "absolute";
+            steps = [
+              {
+                color = "red";
+                value = 0;
+              }
+              {
+                color = "green";
+                value = 1;
+              }
+            ];
+          };
+          unit = "none";
+        };
+      };
+      targets = [
+        {
+          expr = "node_systemd_unit_state{name=\"${service}\",state=\"active\"}";
+        }
+      ];
+      title = name;
+      type = "stat";
+    }
+  ) services;
+}