commit d423567a9506f6ccfc09b137e6184280b92e37b6 · pyrox.dev/nixpkgs

+127

nixos/modules/services/monitoring/prometheus/snmp-exporter.nix

···

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       { config, pkgs, lib, ... }:

     

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       with lib;

     

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       let

     

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         cfg = config.services.prometheus.snmpExporter;

     

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         mkConfigFile = pkgs.writeText "snmp.yml" (if cfg.configurationPath == null then builtins.toJSON cfg.configuration else builtins.readFile cfg.configurationPath);

     

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       in {

     

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         options = {

     

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           services.prometheus.snmpExporter = {

     

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             enable = mkEnableOption "Prometheus snmp exporter";

     

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             user = mkOption {

     

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               type = types.str;

     

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               default = "nobody";

     

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               description = ''

     

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                 User name under which snmp exporter shall be run.

     

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               '';

     

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             };

     

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             group = mkOption {

     

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               type = types.str;

     

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               default = "nogroup";

     

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               description = ''

     

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                 Group under which snmp exporter shall be run.

     

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               '';

     

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             };

     

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             port = mkOption {

     

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               type = types.int;

     

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               default = 9116;

     

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               description = ''

     

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                 Port to listen on.

     

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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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               description = ''

     

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                 Address to listen on for web interface and telemetry.

     

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               '';

     

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             };

     

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             configurationPath = mkOption {

     

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               type = types.nullOr types.path;

     

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               default = null;

     

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               description = ''

     

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                 Path to a snmp exporter configuration file. Mutually exclusive with 'configuration' option.

     

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               '';

     

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               example = "./snmp.yml";

     

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             };

     

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             configuration = mkOption {

     

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               type = types.nullOr types.attrs;

     

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               default = {};

     

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               description = ''

     

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                 Snmp exporter configuration as nix attribute set. Mutually exclusive with 'configurationPath' option.

     

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               '';

     

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               example = ''

     

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                 {

     

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                   "default" = {

     

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                     "version" = 2;

     

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                     "auth" = {

     

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                       "community" = "public";

     

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                     };

     

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                   };

     

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                 };

     

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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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               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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           assertions = singleton

     

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             {

     

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               assertion = (cfg.configurationPath == null) != (cfg.configuration == null);

     

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               message = "Please ensure you have either 'configuration' or 'configurationPath' set!";

     

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             };

     

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           systemd.services.prometheus-snmp-exporter = {

     

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             wantedBy = [ "multi-user.target" ];

     

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             after = [ "network.target" ];

     

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             script = ''

     

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               ${pkgs.prometheus-snmp-exporter.bin}/bin/snmp_exporter \

     

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                 -config.file ${mkConfigFile} \

     

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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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             '';

     

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             serviceConfig = {

     

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               User = cfg.user;

     

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               Group = cfg.group;

     

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               Restart  = "always";

     

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               PrivateTmp = true;

     

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               WorkingDirectory = "/tmp";

     

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             };

     

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           };

     

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         };

     

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       }