scrape haproxy metrics

hosts/proxy/default.nix

@@ -448,6 +448,7 @@
             stats show-node
             stats show-modules
             stats admin if TRUE  # Enable admin operations
+            http-request use-service prometheus-exporter if { path /metrics }
 
           frontend http-in
             bind *:80
@@ -547,8 +548,27 @@
           ) "" forwards}
         '';
       };
+      vector.settings = {
+        sources.haproxy_metrics = {
+          type = "prometheus_scrape";
+          endpoints = [ "http://127.0.0.1:8404/metrics" ];
+          scrape_interval_secs = 15;
+        };
+        transforms.add_host_label_haproxy = {
+          type = "remap";
+          inputs = [ "haproxy_metrics" ];
+          source = ''
+            .tags.host = get_hostname!()
+          '';
+        };
+        sinks.mimir.inputs = lib.mkForce [
+          "add_host_label_metrics"
+          "add_host_label_haproxy"
+        ];
+      };
     };
 
+
   environment.systemPackages = with pkgs; [
   ];