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|
{ config, lib, pkgs, options }:
with lib;
let
cfg = config.services.prometheus.exporters.postfix;
in
{
port = 9154;
extraOpts = {
telemetryPath = mkOption {
type = types.str;
default = "/metrics";
description = ''
Path under which to expose metrics.
'';
};
logfilePath = mkOption {
type = types.path;
default = "/var/log/postfix_exporter_input.log";
example = "/var/log/mail.log";
description = ''
Path where Postfix writes log entries.
This file will be truncated by this exporter!
'';
};
showqPath = mkOption {
type = types.path;
default = "/var/spool/postfix/public/showq";
example = "/var/lib/postfix/queue/public/showq";
description = ''
Path where Postfix places it's showq socket.
'';
};
systemd = {
enable = mkEnableOption ''
reading metrics from the systemd-journal instead of from a logfile
'';
unit = mkOption {
type = types.str;
default = "postfix.service";
description = ''
Name of the postfix systemd unit.
'';
};
slice = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
Name of the postfix systemd slice.
This overrides the <option>systemd.unit</option>.
'';
};
journalPath = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
Path to the systemd journal.
'';
};
};
};
serviceOpts = {
serviceConfig = {
DynamicUser = false;
ExecStart = ''
${pkgs.prometheus-postfix-exporter}/bin/postfix_exporter \
--web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
--web.telemetry-path ${cfg.telemetryPath} \
--postfix.showq_path ${escapeShellArg cfg.showqPath} \
${concatStringsSep " \\\n " (cfg.extraFlags
++ optional cfg.systemd.enable "--systemd.enable"
++ optional cfg.systemd.enable (if cfg.systemd.slice != null
then "--systemd.slice ${cfg.systemd.slice}"
else "--systemd.unit ${cfg.systemd.unit}")
++ optional (cfg.systemd.enable && (cfg.systemd.journalPath != null))
"--systemd.journal_path ${escapeShellArg cfg.systemd.journalPath}"
++ optional (!cfg.systemd.enable) "--postfix.logfile_path ${escapeShellArg cfg.logfilePath}")}
'';
};
};
}
|