Back port upcomming change from #26 fixing #17

Co-authored-by: Florian Sesser <florian@leastauthority.com>
Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

Author: btlogy

nix/common/default.nix

@@ -8,8 +8,13 @@
     ./sops.nix
   ];
 
+  # Keep log file disk usage in check.
+  # The default is 10% of the partitition size or so.
   services.journald.extraConfig = ''
-    SystemMaxUse=500M
+    # One week of logs ought to be enough
+    MaxRetentionSec=${toString(7 * (24 * 60 * 60))}s
+    MaxFileSec=1day
+    SystemMaxUse=250M
   '';
 
   nix.gc = {