nixos/colony: Make fstrim happen right before backup

lib/default.nix

@@ -254,6 +254,11 @@ rec {
       };
       vip1 = "${start.vip1}4/30";
     };
+    fstrimConfig = {
+      enable = true;
+      # backup happens at 05:00
+      interval = "04:45";
+    };
   };
   sshKeyFiles = {
     me = ../.keys/me.pub;

nixos/boxes/colony/default.nix

@@ -88,6 +88,7 @@
         };
 
         services = {
+          fstrim = lib.my.colony.fstrimConfig;
           lvm = {
             boot.thin.enable = true;
             dmeventd.enable = true;

nixos/boxes/colony/vms/estuary/default.nix

@@ -91,6 +91,7 @@ in
             };
 
             services = {
+              fstrim = lib.my.colony.fstrimConfig;
               lvm = {
                 dmeventd.enable = true;
               };

nixos/boxes/colony/vms/shill/default.nix

@@ -92,7 +92,7 @@
             };
 
             services = {
-              fstrim.enable = true;
+              fstrim = lib.my.colony.fstrimConfig;
               netdata.enable = true;
             };
 

nixos/boxes/colony/vms/whale2/default.nix

@@ -93,7 +93,7 @@ in
             };
 
             services = {
-              fstrim.enable = true;
+              fstrim = lib.my.colony.fstrimConfig;
               netdata.enable = true;
             };
 

nixos/modules/server.nix

@@ -14,6 +14,18 @@ in
       kmscon.autologinUser = mkDefault uname;
       resolved.llmnr = mkDefault "false";
     };
+    systemd = {
+      timers = {
+        fstrim = mkIf config.services.fstrim.enable {
+          timerConfig = {
+            # Upstream unit has these at crazy high values that probably
+            # make sense on desktops / laptops
+            AccuracySec = "1min";
+            RandomizedDelaySec = "5min";
+          };
+        };
+      };
+    };
 
     my = {
       gui.enable = false;