Add nixos/modules/watchdog.nix

nixos/modules/watchdog.nix

@@ -0,0 +1,24 @@
+{ config, pkgs, ... }:
+
+{
+  systemd.services.anubis-watchdog = {
+    description = "Anubis Docker logs -> AbuseIPDB watchdog";
+    after = [ "network.target" "docker.service" ];
+    wantedBy = [ "multi-user.target" ];
+
+    # make docker/curl available to the unit's PATH (Nix-native)
+    path = [ pkgs.docker pkgs.curl pkgs.python3 pkgs.nftables ];
+
+    serviceConfig = {
+      ExecStart = "${pkgs.python3}/bin/python3 /etc/anubis-watchdog/watchdog.py";
+      Restart = "on-failure";
+      RestartSec = "10";
+      User = "root";
+      Environment = [
+        "ABUSEIPDB_KEY_FILE=/etc/anubis-watchdog/abuseipdb.key"
+        "DOCKER_BIN=/run/current-system/sw/bin/docker"
+        # optional: "CURL_BIN=/run/current-system/sw/bin/curl"
+      ];
+    };
+  };
+}