128 lines
4.5 KiB
Nix
128 lines
4.5 KiB
Nix
{ pkgs, lib, config, ... }:
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let
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isVM = lib.any (mod: mod == "xen-blkfront" || mod == "virtio_console") config.boot.initrd.kernelModules;
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in
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{
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networking.firewall.allowedTCPPorts = [ 9273 ];
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systemd.services.telegraf.path = [ pkgs.nvme-cli ];
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services.telegraf = {
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enable = true;
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extraConfig = {
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agent.interval = "60s";
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inputs = {
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#syslog.server = "unixgram:///run/systemd/journal/syslog";
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#syslog.best_effort = true;
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#syslog.syslog_standard = "RFC3164";
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prometheus.urls = lib.mkIf (config.services.promtail.enable) [
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# default promtail port
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"http://localhost:9080/metrics"
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];
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prometheus.metric_version = 2;
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kernel_vmstat = { };
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smart = lib.mkIf (!isVM) {
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path = pkgs.writeShellScript "smartctl" ''
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exec /run/wrappers/bin/sudo ${pkgs.smartmontools}/bin/smartctl "$@"
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'';
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};
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mdstat = { };
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system = { };
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mem = { };
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file = [{
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data_format = "influx";
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file_tag = "name";
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files = [ "/var/log/telegraf/*" ];
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}] ++ lib.optional (lib.any (fs: fs == "ext4") config.boot.supportedFilesystems) {
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name_override = "ext4_errors";
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files = [ "/sys/fs/ext4/*/errors_count" ];
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data_format = "value";
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};
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exec = [{
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## Commands array
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commands = (lib.optional (lib.any (fs: fs == "zfs") config.boot.supportedFilesystems)
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(pkgs.writeScript "zpool-health" ''
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#!${pkgs.gawk}/bin/awk -f
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BEGIN {
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while ("${pkgs.zfs}/bin/zpool status" | getline) {
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if ($1 ~ /pool:/) { printf "zpool_status,name=%s ", $2 }
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if ($1 ~ /state:/) { printf " state=\"%s\",", $2 }
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if ($1 ~ /errors:/) {
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if (index($2, "No")) printf "errors=0i\n"; else printf "errors=%di\n", $2
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}
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}
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}
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'')
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) ++ (
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let
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collectHosts = shares: fs:
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if builtins.elem fs.fsType [ "nfs" "nfs3" "nfs4" ] then
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shares // (
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let
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# also match ipv6 addresses
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group = builtins.match "\\[?([^\]]+)]?:([^:]+)$" fs.device;
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host = builtins.head group;
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path = builtins.elemAt group 1;
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in
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{
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${host} = (shares.${host} or [ ]) ++ [ path ];
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}
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)
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else
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shares;
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nfsHosts = lib.foldl collectHosts { } (builtins.attrValues config.fileSystems);
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in
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lib.mapAttrsToList
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(host: args:
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(pkgs.writeScript "zpool-health" ''
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#!${pkgs.gawk}/bin/awk -f
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BEGIN {
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for (i = 2; i < ARGC; i++) {
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mounts[ARGV[i]] = 1
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}
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while ("${pkgs.nfs-utils}/bin/showmount -e " ARGV[1] | getline) {
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if (NR == 1) { continue }
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if (mounts[$1] == 1) {
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printf "nfs_export,host=%s,path=%s present=1\n", ARGV[1], $1
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}
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delete mounts[$1]
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}
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for (mount in mounts) {
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printf "nfs_export,host=%s,path=%s present=0\n", ARGV[1], $1
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}
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}
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'') + " ${host} ${builtins.concatStringsSep " " args}"
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)
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nfsHosts
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);
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data_format = "influx";
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}];
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systemd_units = { };
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swap = { };
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disk.tagdrop = {
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fstype = [ "tmpfs" "ramfs" "devtmpfs" "devfs" "iso9660" "overlay" "aufs" "squashfs" ];
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device = [ "rpc_pipefs" "lxcfs" "nsfs" "borgfs" ];
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};
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diskio = { };
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};
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outputs.prometheus_client = {
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listen = ":9273";
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metric_version = 2;
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};
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};
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};
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security.sudo.extraRules = lib.mkIf (!isVM) [{
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users = [ "telegraf" ];
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commands = [{
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command = "${pkgs.smartmontools}/bin/smartctl";
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options = [ "NOPASSWD" ];
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}];
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}];
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# avoid logging sudo use
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security.sudo.configFile = ''
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Defaults:telegraf !syslog,!pam_session
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'';
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# create dummy file to avoid telegraf errors
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systemd.tmpfiles.rules = [
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"f /var/log/telegraf/dummy 0444 root root - -"
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];
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}
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