nixos/tests/prometheus-exporters: add unbound test

Author: WilliButz <willibutz@posteo.de>

nixos/tests/prometheus-exporters.nix

@@ -1000,6 +1000,29 @@ let
       '';
     };
 
+    unbound = {
+      exporterConfig = {
+        enable = true;
+        fetchType = "uds";
+        controlInterface = "/run/unbound/unbound.ctl";
+      };
+      metricProvider = {
+        services.unbound = {
+          enable = true;
+          localControlSocketPath = "/run/unbound/unbound.ctl";
+        };
+        systemd.services.prometheus-unbound-exporter.serviceConfig = {
+          SupplementaryGroups = [ "unbound" ];
+        };
+      };
+      exporterTest = ''
+        wait_for_unit("unbound.service")
+        wait_for_unit("prometheus-unbound-exporter.service")
+        wait_for_open_port(9167)
+        succeed("curl -sSf localhost:9167/metrics | grep -q 'unbound_up 1'")
+      '';
+    };
+
     varnish = {
       exporterConfig = {
         enable = true;

pkgs/servers/monitoring/prometheus/unbound-exporter.nix

@@ -1,4 +1,4 @@
-{ lib, rustPlatform, fetchFromGitHub, openssl, pkg-config }:
+{ lib, rustPlatform, fetchFromGitHub, openssl, pkg-config, nixosTests }:
 
 rustPlatform.buildRustPackage rec {
   pname = "unbound-telemetry";
@@ -17,6 +17,10 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [ openssl ];
 
+  passthru.tests = {
+    inherit (nixosTests.prometheus-exporters) unbound;
+  };
+
   meta = with lib; {
     description = "Prometheus exporter for Unbound DNS resolver";
     homepage = "https://github.com/svartalf/unbound-telemetry";