From 209867b501f4f0dbdaee028d5487ed28ffe3f3fd Mon Sep 17 00:00:00 2001
From: Ingolf Wagner <contact@ingolf-wagner.de>
Date: Mon, 15 May 2023 09:30:42 +0200
Subject: [PATCH] track smartd with telegraf

---
 nixos/machines/chungus/configuration.nix  |  2 +-
 nixos/machines/chungus/telegraf-smart.nix | 28 +++++++++++++++++++++++
 nixos/machines/chungus/telegraf.nix       |  5 ++--
 3 files changed, 32 insertions(+), 3 deletions(-)
 create mode 100644 nixos/machines/chungus/telegraf-smart.nix

diff --git a/nixos/machines/chungus/configuration.nix b/nixos/machines/chungus/configuration.nix
index 5df5047..c597796 100644
--- a/nixos/machines/chungus/configuration.nix
+++ b/nixos/machines/chungus/configuration.nix
@@ -30,6 +30,7 @@
     ./prometheus.nix
     ./grafana.nix
     ./telegraf.nix
+    ./telegraf-smart.nix
 
     #./home-display.nix
 
@@ -86,7 +87,6 @@
   #};
 
   services.printing.enable = false;
-  services.smartd.enable = true;
 
   #home-manager.users.mailUser.home.stateVersion = "22.11";
 
diff --git a/nixos/machines/chungus/telegraf-smart.nix b/nixos/machines/chungus/telegraf-smart.nix
new file mode 100644
index 0000000..e740dd3
--- /dev/null
+++ b/nixos/machines/chungus/telegraf-smart.nix
@@ -0,0 +1,28 @@
+{ pkgs, ... }:
+{
+  systemd.services.telegraf.path = [ pkgs.smartmontools pkgs.nvme-cli "/run/wrappers" ];
+  environment.systemPackages = [ pkgs.smartmontools pkgs.nvme-cli ];
+
+  services.telegraf = {
+    enable = true;
+    extraConfig.inputs.smart = {
+      attributes = true;
+      use_sudo = true;
+    };
+  };
+
+  services.smartd.enable = true;
+  security.sudo.configFile = ''
+     # For smartctl add the following lines:
+     Cmnd_Alias SMARTCTL = ${pkgs.smartmontools}/bin/smartctl
+     telegraf  ALL=(ALL) NOPASSWD: SMARTCTL
+     Defaults!SMARTCTL !logfile, !syslog, !pam_session
+
+    # For nvme-cli add the following lines:
+    Cmnd_Alias NVME = ${pkgs.nvme-cli}/bin/nvme
+    telegraf  ALL=(ALL) NOPASSWD: NVME
+    Defaults!NVME !logfile, !syslog, !pam_session
+  '';
+
+}
+
diff --git a/nixos/machines/chungus/telegraf.nix b/nixos/machines/chungus/telegraf.nix
index 5e65cd9..df51085 100644
--- a/nixos/machines/chungus/telegraf.nix
+++ b/nixos/machines/chungus/telegraf.nix
@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 let
   urls = [
     { url = "https://bitwarden.ingolf-wagner.de"; path = ""; }
@@ -24,6 +24,7 @@ in
       inputs = {
         cpu = { };
         diskio = { };
+        smart.attributes = true;
         x509_cert = [{
           sources = (map (url: "${url.url}:443") urls);
           interval = "30m"; # agent.interval = "10s" is default
@@ -49,7 +50,7 @@ in
         targets = [ "localhost:9273" ];
         labels = {
           service = "telegraf";
-          server = "pepe";
+          server = config.networking.hostName;
         };
       }];
     }