l prism.r: add telegraf.nix

lass/1systems/prism/config.nix

@@ -7,11 +7,12 @@ with import <stockholm/lib>;
     <stockholm/lass/2configs/retiolum.nix>
     <stockholm/lass/2configs/libvirt.nix>
     <stockholm/lass/2configs/tv.nix>
+    <stockholm/lass/2configs/websites/lassulus.nix>
+    <stockholm/lass/2configs/telegraf.nix>
     {
       services.nginx.enable = true;
       imports = [
         <stockholm/lass/2configs/websites/domsen.nix>
-        <stockholm/lass/2configs/websites/lassulus.nix>
       ];
       # needed by domsen.nix ^^
       lass.usershadow = {

lass/2configs/telegraf.nix

@@ -0,0 +1,67 @@
+{ config, lib, pkgs, ... }:
+let
+  isVM = lib.any (mod: mod == "xen-blkfront" || mod == "virtio_console") config.boot.initrd.kernelModules;
+in {
+
+  krebs.iptables.tables.filter.INPUT.rules = [
+    { predicate = "-i retiolum -p tcp --dport 9273"; target = "ACCEPT"; }
+  ];
+
+  systemd.services.telegraf.path = [ pkgs.nvme-cli ];
+
+  services.telegraf = {
+    enable = true;
+    extraConfig = {
+      agent.interval = "60s";
+      inputs = {
+        prometheus.metric_version = 2;
+        kernel_vmstat = { };
+        # smart = lib.mkIf (!isVM) {
+        #   path = pkgs.writeShellScript "smartctl" ''
+        #     exec /run/wrappers/bin/sudo ${pkgs.smartmontools}/bin/smartctl "$@"
+        #   '';
+        # };
+        system = { };
+        mem = { };
+        file = [{
+          data_format = "influx";
+          file_tag = "name";
+          files = [ "/var/log/telegraf/*" ];
+        }] ++ lib.optional (lib.any (fs: fs == "ext4") config.boot.supportedFilesystems) {
+          name_override = "ext4_errors";
+          files = [ "/sys/fs/ext4/*/errors_count" ];
+          data_format = "value";
+        };
+        exec = lib.optionalAttrs (lib.any (fs: fs == "zfs") config.boot.supportedFilesystems) {
+          ## Commands array
+          commands = [
+            (pkgs.writeScript "zpool-health" ''
+              #!${pkgs.gawk}/bin/awk -f
+              BEGIN {
+                while ("${pkgs.zfs}/bin/zpool status" | getline) {
+                  if ($1 ~ /pool:/) { printf "zpool_status,name=%s ", $2 }
+                  if ($1 ~ /state:/) { printf " state=\"%s\",", $2 }
+                  if ($1 ~ /errors:/) {
+                    if (index($2, "No")) printf "errors=0i\n"; else printf "errors=%di\n", $2
+                  }
+                }
+              }
+            '')
+          ];
+          data_format = "influx";
+        };
+        systemd_units = { };
+        swap = { };
+        disk.tagdrop = {
+          fstype = [ "tmpfs" "ramfs" "devtmpfs" "devfs" "iso9660" "overlay" "aufs" "squashfs" ];
+          device = [ "rpc_pipefs" "lxcfs" "nsfs" "borgfs" ];
+        };
+        diskio = { };
+      };
+      outputs.prometheus_client = {
+        listen = ":9273";
+        metric_version = 2;
+      };
+    };
+  };
+}