nixos/tuptime: init module

nixos/modules/module-list.nix

@@ -545,6 +545,7 @@
   ./services/monitoring/teamviewer.nix
   ./services/monitoring/telegraf.nix
   ./services/monitoring/thanos.nix
+  ./services/monitoring/tuptime.nix
   ./services/monitoring/ups.nix
   ./services/monitoring/uptime.nix
   ./services/monitoring/vnstat.nix

nixos/modules/services/monitoring/tuptime.nix

@@ -0,0 +1,84 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.tuptime;
+
+in {
+
+  options.services.tuptime = {
+
+    enable = mkEnableOption "the total uptime service";
+
+    timer = {
+      enable = mkOption {
+        type = types.bool;
+        default = true;
+        description = "Whether to regularly log uptime to detect bad shutdowns.";
+      };
+
+      period = mkOption {
+        type = types.str;
+        default = "*:0/5";
+        description = "systemd calendar event";
+      };
+    };
+  };
+
+
+  config = mkIf cfg.enable {
+
+    environment.systemPackages = [ pkgs.tuptime ];
+
+    users.users.tuptime.description = "tuptime database owner";
+
+    systemd = {
+      services = {
+
+        tuptime = {
+          description = "the total uptime service";
+          documentation = [ "man:tuptime(1)" ];
+          after = [ "time-sync.target" ];
+          wantedBy = [ "multi-user.target" ];
+          serviceConfig = {
+            StateDirectory = "tuptime";
+            Type = "oneshot";
+            User = "tuptime";
+            RemainAfterExit = true;
+            ExecStart = "${pkgs.tuptime}/bin/tuptime -x";
+            ExecStop = "${pkgs.tuptime}/bin/tuptime -xg";
+          };
+        };
+
+        tuptime-oneshot = mkIf cfg.timer.enable {
+          description = "the tuptime scheduled execution unit";
+          serviceConfig = {
+            StateDirectory = "tuptime";
+            Type = "oneshot";
+            User = "tuptime";
+            ExecStart = "${pkgs.tuptime}/bin/tuptime -x";
+          };
+        };
+      };
+
+      timers.tuptime = mkIf cfg.timer.enable {
+        description = "the tuptime scheduled execution timer";
+        # this timer should be started if the service is started
+        # even if the timer was previously stopped
+        wantedBy = [ "tuptime.service" "timers.target" ];
+        # this timer should be stopped if the service is stopped
+        partOf = [ "tuptime.service" ];
+        timerConfig = {
+          OnBootSec = "1min";
+          OnCalendar = cfg.timer.period;
+          Unit = "tuptime-oneshot.service";
+        };
+      };
+    };
+  };
+
+  meta.maintainers = [ maintainers.evils ];
+
+}