kcnhub: earlyoom: kill when running OOM

machines/kcnhub/services.nix

@@ -3,6 +3,7 @@
     ./services/ssh.nix
     ./services/xrdp.nix
     ./services/vnc-startup.nix
+    ./services/earlyoom.nix
   ];
   services.vscode-server.enable = true;
 }

machines/kcnhub/services/earlyoom.nix

@@ -0,0 +1,9 @@
+{ config, pkgs, lib, ... }: {
+  services.earlyoom = {
+    enable = true;
+    # What % Memory Needs to Be left to send SIGTERM
+    freeMemThreshold = 10;
+    # What % Memory Needs to Be left to send SIGKILL
+    freeMemKillThreshold = 5;
+  };
+}