From ba615f1b29c21ec594f5bb3c16bfd4be5916dc7d Mon Sep 17 00:00:00 2001
From: Felix Buehler <account@buehler.rocks>
Date: Thu, 13 Apr 2023 23:50:21 +0200
Subject: [PATCH] service/prometheus: enable systemd target and make datasource
 default

---
 modules/services/prometheus/default.nix | 30 ++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/modules/services/prometheus/default.nix b/modules/services/prometheus/default.nix
index 9889566..bd2ef35 100644
--- a/modules/services/prometheus/default.nix
+++ b/modules/services/prometheus/default.nix
@@ -45,6 +45,10 @@ in
           port = 9100;
           listenAddress = "127.0.0.1";
         };
+        systemd = {
+          enable = true;
+          listenAddress = "127.0.0.1";
+        };
       };
 
       globalConfig = {
@@ -53,9 +57,30 @@ in
 
       scrapeConfigs = [
         {
-          job_name = config.networking.hostName;
+          job_name = "prometheus";
+          static_configs = [{
+            targets = [ "127.0.0.1:${toString cfg.port}" ];
+            labels = {
+              instance = config.networking.hostName;
+            };
+          }];
+        }
+        {
+          job_name = "node";
           static_configs = [{
             targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.node.port}" ];
+            labels = {
+              instance = config.networking.hostName;
+            };
+          }];
+        }
+        {
+          job_name = "systemd";
+          static_configs = [{
+            targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.systemd.port}" ];
+            labels = {
+              instance = config.networking.hostName;
+            };
           }];
         }
       ];
@@ -66,8 +91,11 @@ in
         {
           name = "Prometheus";
           type = "prometheus";
+          isDefault = true;
           url = "http://127.0.0.1:${toString config.services.prometheus.port}";
           jsonData = {
+            prometheusType = "Prometheus";
+            prometheusVersion = toString pkgs.prometheus.version;
             timeInterval = config.services.prometheus.globalConfig.scrape_interval;
           };
         }