export and scrape dibbler prometheus stats

hosts/ildkule/services/monitoring/prometheus/default.nix

@@ -8,6 +8,7 @@ in {
     ./matrix-synapse.nix
     ./mysqld.nix
     ./postgres.nix
+    ./dibbler.nix
   ];
 
   services.prometheus = {

hosts/ildkule/services/monitoring/prometheus/dibbler.nix

@@ -0,0 +1,52 @@
+{ ... }:
+{
+  services.prometheus.scrapeConfigs = [{
+    job_name = "sql_exporter";
+    scrape_interval = "1m";
+    scheme = "http";
+
+    static_configs = [{
+      targets = [ "localhost:9237" ];
+    }];
+  }];
+  services.prometheus.exporters.sql = {
+    enable = true;
+    configuration = {
+      jobs.dibbler = {
+        interval = "1m";
+        connections = [
+          "postgres://pvv_vv:WP97&amDp&*gfhg3TyR8@postgres.pvv.ntnu.no"
+        ];
+
+        queries."daily_purchase_sum" = {
+          help = "Sum of purchases for the current day.";
+          labels = [ "thing" ];
+          values = [ "sum" ];
+          query = "SELECT SUM(price) FROM purchases GROUP BY DATE(time) ORDER BY DATE(time) DESC LIMIT 1";
+        };
+
+        queries."total_purchase_sum" = {
+          help = "Sum of all purchases.";
+          labels = [ "thing" ];
+          values = [ "sum" ];
+          query = " SELECT SUM(price) FROM purchases";
+        };
+
+        queries."total_stock_value" = {
+          help = "The value of all stock in dibbler.";
+          labels = [ "thing" ];
+          values = [ "sum" ];
+          query = "
+            SELECT SUM(price * stock) FROM products";
+        };
+
+        queries."user_credit_sum" = {
+          help = "The sum of all user credit.";
+          labels = [ "thing" ];
+          values = [ "sum" ];
+          query = "SELECT SUM(credit) FROM users";
+        };
+      };
+    };
+  };
+}