Add nextdns exporter

homelab/kubernetes.nix

@@ -23,5 +23,6 @@
     (import ./netboot.nix)
     (import ./nitter.nix)
     (import ./changedetection.nix)
+    (import ./nextdns-exporter.nix)
   ];
 }

homelab/nextdns-exporter.nix

@@ -0,0 +1,60 @@
+let
+  appName = "nextdns-exporter";
+  nextdns-exporterImage = "ghcr.io/raylas/nextdns-exporter:0.5.3";
+in {
+  kubernetes.resources."monitoring.coreos.com"."v1".ServiceMonitor.nextdns-exporter = {
+    metadata.labels.app = appName;
+    spec = {
+      selector.matchLabels.app = appName;
+      endpoints = [
+        {
+          port = "metrics";
+          interval = "30s";
+        }
+        {
+          port = "ts-metrics";
+          interval = "30s";
+        }
+      ];
+    };
+  };
+
+  kubernetes.resources.services.nextdns-exporter-metrics = {
+    metadata.labels.app = appName;
+    spec = {
+      selector.app = appName;
+      ports.metrics = {
+        port = 9948;
+        targetPort = 9948;
+      };
+      ports.ts-metrics = {
+        port = 9949;
+        targetPort = 9949;
+      };
+    };
+  };
+
+  kubernetes.resources.deployments.nextdns-exporter.spec = {
+    selector.matchLabels.app = appName;
+    template = {
+      metadata.labels.app = appName;
+      spec = {
+        containers = {
+          nextdns-exporter = {
+            image = nextdns-exporterImage;
+            imagePullPolicy = "Always";
+            ports.metrics.containerPort = 9948;
+            envFrom = [{secretRef.name = "nextdns-exporter";}];
+          };
+          nextdns-ts-exporter = {
+            image = nextdns-exporterImage;
+            imagePullPolicy = "Always";
+            ports.metrics.containerPort = 9949;
+            env.METRICS_PORT.value = "9949";
+            envFrom = [{secretRef.name = "nextdns-ts-exporter";}];
+          };
+        };
+      };
+    };
+  };
+}