add caddy metrics

clients/quadraticserver/stats/grafana.nix

@@ -61,6 +61,25 @@ in
                 hash = "sha256-pNgn6xgZBEu6LW0lc0cXX2gRkQ8lg/rer34SPE3yEl4=";
               };
             }
+            {
+              name = "Caddy Hosts";
+              options.path = pkgs.stdenv.mkDerivation {
+                pname = "caddy-hosts-json";
+                version = "1.0.0";
+                dontUnpack = true;
+
+                src = pkgs.fetchurl {
+                  name = "caddy-hosts.json";
+                  url = "https://grafana.com/api/dashboards/24146/revisions/1/download";
+                  hash = "sha256-vw/O3bNKQ0tJwhsZKYvkMU6jeqkG+sfCtA7YT0vp3YY=";
+                };
+
+                installPhase = ''
+                  mkdir -p $out
+                  sed 's|''${DS_PROMETHEUS}|prometheus|g' $src > $out/caddy-exporter.json
+                '';
+              };
+            }
           ];
         };
       };

clients/quadraticserver/stats/prometheus.nix

@@ -16,33 +16,23 @@
           }
         ];
       }
+      {
+        job_name = "caddy";
+        static_configs = [
+          { targets = [ "localhost:2019" ]; }
+        ];
+      }
     ];
 
-    exporters.node = {
+    exporters = {
-      enable = true;
+      node = {
-      listenAddress = "127.0.0.3";
+        enable = true;
-      enabledCollectors = [
+        listenAddress = "127.0.0.3";
-        "systemd"
+        enabledCollectors = [
-        "processes"
+          "systemd"
-      ];
+          "processes"
-      # disabledCollectors = [
+        ];
-      #   "arp"
+      };
-      #   "bcache"
-      #   "bonding"
-      #   "btrfs"
-      #   "conntrack"
-      #   "dmi"
-      #   "edac"
-      #   "entropy"
-      #   "exec"
-      #   "fibrechannel"
-      #   "filefd"
-      #   "hwmon"
-      #   "infiniband"
-      #   "ipvs"
-      #   "mdadm"
-      #   "netclass"
-      # ];
     };
   };
 }

modules/server/caddy.nix

@@ -25,6 +25,12 @@
         hash = "sha256-t1qQtYpBKCWeHV8ML200LzB+Sc8iAGl2kc9pvOCKdac=";
       };
 
+      globalConfig = ''
+        metrics {
+          per_host
+        }
+      '';
+
       virtualHosts = lib.mapAttrs (domain: host: {
         extraConfig =
           let