diff --git a/ops/nixos/lib/seaweedfs.nix b/ops/nixos/lib/seaweedfs.nix
index 58c5c33007..bfbc47ab06 100644
--- a/ops/nixos/lib/seaweedfs.nix
+++ b/ops/nixos/lib/seaweedfs.nix
@@ -138,6 +138,30 @@ in {
         default = {};
       };
     };
+
+    sync = lib.mkOption {
+      type = lib.types.attrsOf (lib.types.submodule {
+        options = {
+          package = lib.mkOption {
+            type = lib.types.package;
+            default = cfg.package;
+          };
+
+          earlyOptions = lib.mkOption {
+            type = lib.types.submodule {
+              freeformType = commandLineType;
+            };
+            default = {};
+          };
+          options = lib.mkOption {
+            type = lib.types.submodule {
+              freeformType = commandLineType;
+            };
+            default = {};
+          };
+        };
+      });
+    };
   };
 
   config = lib.mkMerge [{
@@ -226,5 +250,22 @@ in {
         Restart = "always";
       };
     };
-  })];
+  }) {
+    systemd.services = lib.mapAttrs' (k: v: lib.nameValuePair "seaweedfs-sync-${k}" {
+      wantedBy = [ "seaweedfs.target" ];
+      unitConfig = {
+        StartLimitIntervalSec = "0";
+      };
+      serviceConfig = {
+        ExecStart = "${v.package}/bin/weed ${makeCommandLine v.earlyOptions} filer.sync ${makeCommandLine v.options}";
+        User = "seaweedfs-sync";
+        DynamicUser = true;
+        Restart = "always";
+
+        RestartSec = "100ms";
+        RestartSteps = 10;
+        RestartMaxDelaySec = "1min";
+      };
+    }) cfg.sync;
+  }];
 }
diff --git a/ops/nixos/totoro/default.nix b/ops/nixos/totoro/default.nix
index c41845edfd..36a4203a73 100644
--- a/ops/nixos/totoro/default.nix
+++ b/ops/nixos/totoro/default.nix
@@ -627,6 +627,10 @@ in {
         master = "[${config.my.ip.tailscale6}]:21000";
       };
     };
+    sync.rexxar.options = {
+      a = "rexxar.int.as205479.net:21010";
+      b = "totoro.int.as205479.net:21010";
+    };
   };
 
   system.stateVersion = "22.11";