add telegraf

2026-06-06 00:34:26 +02:00
parent dddbd8309f
commit 2066940c77
6 changed files with 216 additions and 61 deletions
--- a/modules/nixos/tools/telegraf/default.nix
+++ b/modules/nixos/tools/telegraf/default.nix
@@ -0,0 +1,129 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.syscfg.monitoring.telegraf;
+  hasCollector = name: builtins.elem name cfg.collectors;
+  influxCfg = cfg.outputs.influxdb_v3;
+  telegrafEnvFiles =
+    lib.optional (influxCfg.secretName != null) "/run/secrets/${influxCfg.secretName}";
+  dockerGroups =
+    lib.optionals (cfg.enable && hasCollector "docker" && config.virtualisation.podman.enable) [ "podman" ]
+    ++ lib.optionals (cfg.enable && hasCollector "docker" && config.virtualisation.docker.enable) [ "docker" ];
+  baseConfig = {
+    agent = {
+      interval = "10s";
+      round_interval = true;
+      metric_batch_size = 1000;
+      metric_buffer_limit = 10000;
+      flush_interval = "10s";
+      hostname = config.syscfg.hostname;
+      omit_hostname = false;
+    };
+    global_tags = {
+      host = config.syscfg.hostname;
+    };
+  };
+  inputsConfig = lib.mkMerge [
+    (lib.mkIf (hasCollector "cpu") {
+      inputs.cpu = {
+        percpu = true;
+        totalcpu = true;
+        collect_cpu_time = false;
+        report_active = false;
+      };
+    })
+    (lib.mkIf (hasCollector "mem") {
+      inputs.mem = { };
+    })
+    (lib.mkIf (hasCollector "swap") {
+      inputs.swap = { };
+    })
+    (lib.mkIf (hasCollector "system") {
+      inputs.system = { };
+    })
+    (lib.mkIf (hasCollector "disk") {
+      inputs.disk = {
+        ignore_fs = [ "tmpfs" "devtmpfs" "devfs" "overlay" "squashfs" ];
+      };
+    })
+    (lib.mkIf (hasCollector "diskio") {
+      inputs.diskio = { };
+    })
+    (lib.mkIf (hasCollector "kernel") {
+      inputs.kernel = { };
+    })
+    (lib.mkIf (hasCollector "net") {
+      inputs.net = { };
+    })
+    (lib.mkIf (hasCollector "netstat") {
+      inputs.netstat = { };
+    })
+    (lib.mkIf (hasCollector "processes") {
+      inputs.processes = { };
+    })
+    (lib.mkIf (hasCollector "temp") {
+      inputs.temp = { };
+    })
+    (lib.mkIf (hasCollector "mdstat") {
+      inputs.mdstat = { };
+    })
+    (lib.mkIf (hasCollector "smart") {
+      inputs.smart = {
+        use_sudo = true;
+        attributes = true;
+      };
+    })
+    (lib.mkIf (hasCollector "docker") {
+      inputs.docker = {
+        endpoint = "unix:///var/run/docker.sock";
+        timeout = "5s";
+        perdevice = true;
+        total = false;
+      };
+    })
+    (lib.mkIf (hasCollector "ping") {
+      inputs.ping = {
+        urls = [ "1.1.1.1" ];
+        count = 4;
+        interval = "60s";
+        timeout = 5.0;
+        binary = "${pkgs.iputils}/bin/ping";
+      };
+    })
+  ];
+  outputsConfig = lib.mkMerge [{
+      outputs.influxdb_v3 = {
+        urls = influxCfg.urls;
+        token = influxCfg.token;
+        database = influxCfg.database or "telegraf";
+      };
+    }
+  ];
+in {
+  config = lib.mkIf cfg.enable {
+    services.telegraf = {
+      enable = true;
+      environmentFiles = telegrafEnvFiles;
+      extraConfig = lib.mkMerge [
+        baseConfig
+        inputsConfig
+        outputsConfig
+        cfg.extraConfig
+      ];
+    };
+
+    users.users.telegraf.extraGroups = dockerGroups;
+
+    systemd.services.telegraf = {
+      path = lib.optionals (hasCollector "smart") [ pkgs.smartmontools ];
+      serviceConfig.SupplementaryGroups = dockerGroups;
+    };
+
+    security.sudo.extraRules = lib.optionals (hasCollector "smart") [{
+      users = [ "telegraf" ];
+      commands = [{
+        command = "${pkgs.smartmontools}/bin/smartctl";
+        options = [ "NOPASSWD" ];
+      }];
+    }];
+  };
+}