nix/nixos/common/services/telegraf.nix

{ pkgs, ... }: {
  # Telegraf Monitoring
  
  # Set up the secrets file for the token:
  sops.secrets."services/telegraf" = {
    owner = "telegraf";
    sopsFile = ../../../secrets/secrets.yaml;
    restartUnits = [ "telegraf.service" ];
  };

  # Install the package
  environment.systemPackages = with pkgs; [
    lm_sensors
    telegraf
    smartmontools
    nvme-cli
  ];

  # Allow telegraf to talk to other executables it requires:
  systemd.services.telegraf = {
    path = [ 
      pkgs.lm_sensors               # sensors
      pkgs.smartmontools            # smartctl
      pkgs.sudo                     # sudo
      pkgs.nvme-cli                 # nvme command for smartctl
      "/run/current-system/sw/bin/nixos-version"
     ];
  };

  # Configure the package:
  services.telegraf = {
    enable = true;
    environmentFiles = [ /run/secrets/services/telegraf ];
    extraConfig = {
      outputs = { 
        influxdb_v2 = {
          urls = [ "https://influx.sysctl.io/" ];
          token = "$TELEGRAF_TOKEN";
          organization = "default";
          bucket = "telegrafdb";
          http_headers = { Authorization = "Token $TELEGRAF_TOKEN"; };
        };
      };
      inputs = {
        cpu = {
          percpu = true;
          totalcpu = true;
          collect_cpu_time = false;
          report_active = false;
        };
        disk = {
          ignore_fs = ["tmpfs" "devtmpfs" "devfs" "iso9660" "overlay" "aufs" "squashfs"];
        };
        diskio = {};
        kernel = {};
        mem = {};
        processes = {};
        swap = {};
        system = {};
        net = {};
        # nvidia_smi = {};
        sensors = {};
        smart = {
          timeout = "30s";
        };
        temp = {};
        wireless = {};
        exec =[ 
          {
            commands = [ "/run/current-system/sw/bin/nixos-version" ];
            name_suffix = "_nixos-version";
            data_format = "value";
            data_type = "string";
          }
          {
            commands = [ "/run/current-system/sw/bin/uname -r" ];
            name_suffix = "_kernel-version";
            data_format = "value";
            data_type = "string";
          }
        ];
      };
    };
  };
}