feat: fixed conflicting tmpfiles rule

modules/nixos/services/postgresql/default.nix

@@ -1,4 +1,9 @@
-{ flake, lib, ... }:
+{
+  flake,
+  lib,
+  pkgs,
+  ...
+}:
 let
   inherit (flake.config.machines.devices)
     ceres
@@ -8,16 +13,15 @@ let
     ;
 
   service = instances.postgresql;
-  backupPath = "${instances.syncthing.paths.path1}/${service.name}";
+  # backupPath = "${instances.syncthing.paths.path1}/${service.name}";
 in
 {
   services = {
     postgresqlBackup = {
       enable = true;
-      location = backupPath;
+      # location = backupPath;
       # compression = "zstd";
-      startAt = "*-*-* 22:00:00";
-      # backupAll = true;
+      startAt = "*-*-* 07:00:00";
       databases = [
         instances.mastodon.name
         instances.firefly-iii.name
@@ -53,20 +57,33 @@ in
     instances.syncthing.name
   ];
 
-  systemd.services = {
-    postgresqlBackup-firefly-iii = {
-      serviceConfig = {
-        Group = lib.mkForce instances.syncthing.name;
-      };
-    };
-    postgresqlBackup-mastodon = {
-      serviceConfig = {
-        Group = lib.mkForce instances.syncthing.name;
-      };
+  systemd.services.sync-postgres-backups = {
+    description = "Sync PostgreSQL backups to Syncthing";
+    after = [
+      "postgresqlBackup-firefly-iii.service"
+      "postgresqlBackup-mastodon.service"
+    ];
+    serviceConfig = {
+      Type = "oneshot";
+      User = instances.syncthing.name;
+      Group = instances.syncthing.name;
     };
+    script = ''
+      ${pkgs.rsync}/bin/rsync -av --delete \
+        /var/backup/postgresql/ \
+        ${instances.syncthing.paths.path1}/${service.name}/
+
+      ${pkgs.rsync}/bin/rsync -av --delete \
+        /var/lib/${instances.firefly-iii.name}/storage/ \
+        ${instances.syncthing.paths.path1}/${service.name}/firefly-iii-storage/
+    '';
   };
 
-  system.activationScripts.postgresCommands = ''
-    chown -R ${service.name}:${service.name} ${service.paths.path0}
-  '';
+  systemd.timers.sync-postgres-backups = {
+    wantedBy = [ "timers.target" ];
+    timerConfig = {
+      OnCalendar = "*-*-* 22:10:00"; # 10 mins after backup
+      Persistent = true;
+    };
+  };
 }