nixos: Add Netdata

nixos/modules/common.nix

@@ -128,6 +128,16 @@ in
           permitRootLogin = mkDefault "no";
           passwordAuthentication = mkDefault false;
         };
+
+        netdata = {
+          config = {
+            global = {
+              "memory mode" = "dbengine";
+              "page cache size" = 32;
+              "dbengine multihost disk space" = 256;
+            };
+          };
+        };
       };
     }
     (mkIf config.services.kmscon.enable {

nixos/modules/tmproot.nix

@@ -280,6 +280,18 @@ in
           }
         ];
       })
+      (mkIf config.services.netdata.enable {
+        my.tmproot.persistence.config.directories = [
+          {
+            directory = "/var/lib/netdata";
+            inherit (config.services.netdata) user group;
+          }
+          {
+            directory = "/var/cache/netdata";
+            inherit (config.services.netdata) user group;
+          }
+        ];
+      })
       (persistSimpleSvc "transmission")
       (persistSimpleSvc "jackett")
       (persistSimpleSvc "radarr")