feat: add services.statistics

openwrt/services/default.nix

@@ -3,5 +3,6 @@
 {
   imports = [
     ./qemu-ga.nix
+    ./statistics.nix
   ];
 }

openwrt/services/statistics.nix

@@ -0,0 +1,93 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.services.statistics;
+in
+
+{
+  options.services.statistics = {
+    enable = lib.mkEnableOption (lib.mdDoc "Enable statistics service.");
+
+    backup = {
+      enable = lib.mkEnableOption (lib.mdDoc "Enable statistics periodical backup service.") // { default = true; };
+
+      period = lib.mkOption {
+        default = "0 * * * *";
+        example = "0 * * * *";
+        type = lib.types.str;
+        description = ''
+          Crontab formatted string for backup period. Protect against unintended
+          poweroff event.
+
+          Default to backup every hour.
+        '';
+      };
+    };
+
+    monitors = {
+      interfaces = {
+        enable = lib.mkEnableOption (lib.mdDoc "Monitor network interfaces.") // { default = true; };
+
+        targets = lib.mkOption {
+          default = [];
+          example = ["eth0"];
+          type = lib.types.listOf lib.types.str;
+          description = ''
+            List of network interfaces that will be monitored.
+          '';
+        };
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    packages = [
+      "luci-app-statistics"
+    ];
+
+    etc = {
+      "crontabs/root".text = lib.mkIf cfg.backup.enable ''
+        ${cfg.backup.period} service luci_statistics backup
+      '';
+    };
+
+    uci = {
+      settings = {
+        collectd.globals.globals = {
+          alt_config_file = "/etc/collectd.conf";
+        };
+        luci_statistics = {
+          statistics = {
+            collectd = {
+              BaseDir = "/var/run/collectd";
+              PIDFile = "/var/run/collectd.pid";
+              PluginDir = "/usr/lib/collectd";
+              TypesDB = "/usr/share/collectd/types.db";
+              Interval = 30;
+              ReadThreads = 2;
+              FQDNLookup = 1;
+            };
+            rrdtool = {
+              default_timespan = "2hour";
+              image_width = 600;
+              image_height = 150;
+              image_path = "/tmp/rrdimg";
+            };
+            collectd_rrdtool = {
+              enable = 1;
+              DataDir = "/tmp/rrd";
+              RRARows = 288;
+              RRASingle = 1;
+              backup = 1;
+              RRATimespans = "2hour 1day 1week 1month 1year";
+            };
+            collectd_interface = {
+              enable = if cfg.monitors.interfaces.enable == true then 1 else 0;
+              Interfaces = cfg.monitors.interfaces.targets;
+            };
+          };
+        };
+      };
+    };
+  };
+}