96 lines
3.0 KiB
Nix
96 lines
3.0 KiB
Nix
{ config, lib, pkgs, options }:
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with lib;
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let
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cfg = config.services.prometheus.exporters.postfix;
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in
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{
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port = 9154;
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extraOpts = {
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group = mkOption {
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type = types.str;
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description = ''
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Group under which the postfix exporter shall be run.
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It should match the group that is allowed to access the
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<literal>showq</literal> socket in the <literal>queue/public/</literal> directory.
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Defaults to <literal>services.postfix.setgidGroup</literal> when postfix is enabled.
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'';
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};
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telemetryPath = mkOption {
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type = types.str;
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default = "/metrics";
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description = ''
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Path under which to expose metrics.
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'';
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};
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logfilePath = mkOption {
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type = types.path;
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default = "/var/log/postfix_exporter_input.log";
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example = "/var/log/mail.log";
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description = ''
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Path where Postfix writes log entries.
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This file will be truncated by this exporter!
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'';
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};
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showqPath = mkOption {
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type = types.path;
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default = "/var/lib/postfix/queue/public/showq";
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example = "/var/spool/postfix/public/showq";
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description = ''
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Path where Postfix places its showq socket.
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'';
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};
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systemd = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to enable reading metrics from the systemd journal instead of from a logfile
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'';
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};
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unit = mkOption {
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type = types.str;
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default = "postfix.service";
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description = ''
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Name of the postfix systemd unit.
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'';
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};
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slice = 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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Name of the postfix systemd slice.
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This overrides the <option>systemd.unit</option>.
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'';
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};
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journalPath = 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 the systemd journal.
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'';
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};
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};
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};
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serviceOpts = {
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serviceConfig = {
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DynamicUser = false;
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ExecStart = ''
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${pkgs.prometheus-postfix-exporter}/bin/postfix_exporter \
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--web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
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--web.telemetry-path ${cfg.telemetryPath} \
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--postfix.showq_path ${escapeShellArg cfg.showqPath} \
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${concatStringsSep " \\\n " (cfg.extraFlags
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++ optional cfg.systemd.enable "--systemd.enable"
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++ optional cfg.systemd.enable (if cfg.systemd.slice != null
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then "--systemd.slice ${cfg.systemd.slice}"
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else "--systemd.unit ${cfg.systemd.unit}")
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++ optional (cfg.systemd.enable && (cfg.systemd.journalPath != null))
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"--systemd.journal_path ${escapeShellArg cfg.systemd.journalPath}"
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++ optional (!cfg.systemd.enable) "--postfix.logfile_path ${escapeShellArg cfg.logfilePath}")}
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'';
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};
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};
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}
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