Group shared system settings

system/shared/services/logrotate.nix

@@ -0,0 +1,24 @@
+{ pkgs, lib, ... }: {
+  services.logrotate.settings.header = {
+    # general
+    global = true;
+    dateext = true;
+    dateformat = "-%Y-%m-%d";
+    nomail = true;
+    missingok = true;
+    copytruncate = true;
+
+    # rotation frequency
+    priority = 1;
+    frequency = "weekly";
+    rotate = 7; # special value, means 7 days
+    minage = 7; # avoid rotating files that are less than 7 days old
+
+    # compression
+    compress = true; # compress logs to save space
+    compresscmd = "${lib.getExe' pkgs.zstd "zstd"}";
+    compressoptions = " -Xcompression-level 10";
+    compressext = "zst";
+    uncompresscmd = "${lib.getExe' pkgs.zstd "unzstd"}";
+  };
+}