initial refactoring

platforms/nixos/modules/nmasur/presets/services/journald.nix

@@ -0,0 +1,27 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.nmasur.presets.services.journald;
+in
+
+{
+
+  options.nmasur.presets.services.journald.enable = lib.mkEnableOption "journald configuration";
+
+  config = lib.mkIf cfg.enable {
+    # How long to keep journalctl entries
+    # This helps to make sure log disk usage doesn't grow too unwieldy
+    services.journald.extraConfig = ''
+      SystemMaxUse=4G
+      SystemKeepFree=10G
+      SystemMaxFileSize=128M
+      SystemMaxFiles=500
+      MaxFileSec=1month
+      MaxRetentionSec=2month
+    '';
+  };
+}