129 lines
3.8 KiB
Nix
129 lines
3.8 KiB
Nix
{ config, pkgs, lib, ... }:
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with lib;
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let
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cfg = config.services.prometheus.collectdExporter;
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collectSettingsArgs = if (cfg.collectdBinary.enable) then ''
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-collectd.listen-address ${optionalString (cfg.collectdBinary.listenAddress != null) cfg.collectdBinary.listenAddress}:${toString cfg.collectdBinary.port} \
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-collectd.security-level ${cfg.collectdBinary.securityLevel} \
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'' else "";
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in {
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options = {
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services.prometheus.collectdExporter = {
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enable = mkEnableOption "prometheus collectd exporter";
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port = mkOption {
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type = types.int;
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default = 9103;
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description = ''
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Port to listen on.
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This is used for scraping as well as the to receive collectd data via the write_http plugin.
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'';
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};
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listenAddress = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "0.0.0.0";
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description = ''
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Address to listen on for web interface, telemetry and collectd JSON data.
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'';
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};
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collectdBinary = {
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enable = mkEnableOption "collectd binary protocol receiver";
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authFile = mkOption {
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default = null;
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type = types.nullOr types.path;
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description = "File mapping user names to pre-shared keys (passwords).";
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};
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port = mkOption {
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type = types.int;
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default = 25826;
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description = ''Network address on which to accept collectd binary network packets.'';
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};
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listenAddress = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "0.0.0.0";
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description = ''
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Address to listen on for binary network packets.
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'';
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};
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securityLevel = mkOption {
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type = types.enum ["None" "Sign" "Encrypt"];
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default = "None";
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description = ''
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Minimum required security level for accepted packets.
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'';
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};
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};
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extraFlags = mkOption {
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type = types.listOf types.str;
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default = [];
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description = ''
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Extra commandline options when launching the collectd exporter.
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'';
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};
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logFormat = mkOption {
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type = types.str;
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default = "logger:stderr";
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example = "logger:syslog?appname=bob&local=7 or logger:stdout?json=true";
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description = ''
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Set the log target and format.
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'';
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};
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logLevel = mkOption {
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type = types.enum ["debug" "info" "warn" "error" "fatal"];
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default = "info";
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description = ''
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Only log messages with the given severity or above.
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'';
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};
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openFirewall = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Open port in firewall for incoming connections.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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networking.firewall.allowedTCPPorts = (optional cfg.openFirewall cfg.port) ++
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(optional (cfg.openFirewall && cfg.collectdBinary.enable) cfg.collectdBinary.port);
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systemd.services.prometheus-collectd-exporter = {
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description = "Prometheus exporter for Collectd metrics";
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unitConfig.Documentation = "https://github.com/prometheus/collectd_exporter";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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DynamicUser = true;
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Restart = "always";
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PrivateTmp = true;
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WorkingDirectory = /tmp;
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ExecStart = ''
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${pkgs.prometheus-collectd-exporter}/bin/collectd_exporter \
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-log.format ${cfg.logFormat} \
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-log.level ${cfg.logLevel} \
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-web.listen-address ${optionalString (cfg.listenAddress != null) cfg.listenAddress}:${toString cfg.port} \
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${collectSettingsArgs} \
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${concatStringsSep " " cfg.extraFlags}
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'';
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};
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};
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};
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}
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