add minecraft prometheus exporter

2 files changed, 34 insertions, 3 deletions

diff --git a/modules/games/default.nix b/modules/games/default.nix
index fee8e34..8befc83 100644
--- a/modules/games/default.nix
+++ b/modules/games/default.nix
@@ -55,6 +55,7 @@
     minecraft_mods = {
       image = "itzg/minecraft-server";
       autoStart = true;
+      extraOptions = [ "--network=host" ];
       environment = {
         EULA = "true";
         TYPE = "FABRIC";
@@ -62,15 +63,43 @@
         SEED = "-3691007458655063350";
         INIT_MEMORY = "1G";
         MAX_MEMORY = "4G";
+
+        OVERRIDE_SERVER_PROPERTIES = "false";
       };
-      ports = [
-        "25566:25565"
-      ];
       volumes = [
         "/var/lib/minecraft_mods:/data"
       ];
     };
   };
 
+  systemd.services.prometheus-minecraft-exporter = 
+    let exporter = pkgs.callPackage ../../pkgs/prometheus-minecraft-exporter {};
+  in {
+    description = "minecraft prometheus exporter";
+    enable = true;
+
+    wantedBy = [ "multi-user.target" ];
+    after = [ "network.target" "podman-minecraft_mods.service" ];
+
+    serviceConfig = {
+      ExecStart = (lib.concatStringsSep " " ([
+        "${exporter}/bin/minecraft-exporter"
+        "--web.listen-address=:9150"
+        "--mc.world=/var/lib/minecraft_mods/world"
+        "--mc.name-source=mojang"
+        "--mc.mod-server-stats=fabric"
+        "--web.disable-exporter-metrics"
+      ]));
+      EnvironmentFile = "/etc/secrets/minecraft_rcon.env";
+    };
+  };
+
+  secrets = {
+    minecraft = {
+      source = ../../secrets/minecraft_rcon.env;
+      dest = "/etc/secrets/minecraft_rcon.env";
+    };
+  };
+
   networking.firewall.allowedTCPPorts = [ 25566 ];
 }
diff --git a/modules/monitoring/default.nix b/modules/monitoring/default.nix
index afcffa5..fe49c00 100644
--- a/modules/monitoring/default.nix
+++ b/modules/monitoring/default.nix
@@ -35,6 +35,8 @@ in {
       
       (mkScrapeConfig "garage" [ "fra01" "nyc01" "sin01" ] 3903)
       (mkScrapeConfig "pdns" [ "ettves" "fra01" "nyc01" "sin01" ] 8081)
+      
+      (mkScrape "minecraft" [ "ettves:25585" "ettves:9150" ])
     ];
   };