diff options
Diffstat (limited to 'nixos/modules/services/monitoring/telegraf.nix')
-rw-r--r-- | nixos/modules/services/monitoring/telegraf.nix | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/nixos/modules/services/monitoring/telegraf.nix b/nixos/modules/services/monitoring/telegraf.nix new file mode 100644 index 00000000000..13aae58d0f3 --- /dev/null +++ b/nixos/modules/services/monitoring/telegraf.nix @@ -0,0 +1,90 @@ +{ config, lib, pkgs, ... }: + +with lib; + +let + cfg = config.services.telegraf; + + settingsFormat = pkgs.formats.toml {}; + configFile = settingsFormat.generate "config.toml" cfg.extraConfig; +in { + ###### interface + options = { + services.telegraf = { + enable = mkEnableOption "telegraf server"; + + package = mkOption { + default = pkgs.telegraf; + defaultText = literalExpression "pkgs.telegraf"; + description = "Which telegraf derivation to use"; + type = types.package; + }; + + environmentFiles = mkOption { + type = types.listOf types.path; + default = []; + example = [ "/run/keys/telegraf.env" ]; + description = '' + File to load as environment file. Environment variables from this file + will be interpolated into the config file using envsubst with this + syntax: <literal>$ENVIRONMENT</literal> or <literal>''${VARIABLE}</literal>. + This is useful to avoid putting secrets into the nix store. + ''; + }; + + extraConfig = mkOption { + default = {}; + description = "Extra configuration options for telegraf"; + type = settingsFormat.type; + example = { + outputs.influxdb = { + urls = ["http://localhost:8086"]; + database = "telegraf"; + }; + inputs.statsd = { + service_address = ":8125"; + delete_timings = true; + }; + }; + }; + }; + }; + + + ###### implementation + config = mkIf config.services.telegraf.enable { + systemd.services.telegraf = let + finalConfigFile = if config.services.telegraf.environmentFiles == [] + then configFile + else "/var/run/telegraf/config.toml"; + in { + description = "Telegraf Agent"; + wantedBy = [ "multi-user.target" ]; + after = [ "network-online.target" ]; + serviceConfig = { + EnvironmentFile = config.services.telegraf.environmentFiles; + ExecStartPre = lib.optional (config.services.telegraf.environmentFiles != []) + (pkgs.writeShellScript "pre-start" '' + umask 077 + ${pkgs.envsubst}/bin/envsubst -i "${configFile}" > /var/run/telegraf/config.toml + ''); + ExecStart="${cfg.package}/bin/telegraf -config ${finalConfigFile}"; + ExecReload="${pkgs.coreutils}/bin/kill -HUP $MAINPID"; + RuntimeDirectory = "telegraf"; + User = "telegraf"; + Group = "telegraf"; + Restart = "on-failure"; + # for ping probes + AmbientCapabilities = [ "CAP_NET_RAW" ]; + }; + }; + + users.users.telegraf = { + uid = config.ids.uids.telegraf; + group = "telegraf"; + description = "telegraf daemon user"; + }; + + users.groups.telegraf = {}; + }; +} |