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|
{ config, lib, pkgs, options }:
with lib;
let
cfg = config.services.prometheus.exporters.mail;
configurationFile = pkgs.writeText "prometheus-mail-exporter.conf" (builtins.toJSON (
# removes the _module attribute, null values and converts attrNames to lowercase
mapAttrs' (name: value:
if name == "servers"
then nameValuePair (toLower name)
((map (srv: (mapAttrs' (n: v: nameValuePair (toLower n) v)
(filterAttrs (n: v: !(n == "_module" || v == null)) srv)
))) value)
else nameValuePair (toLower name) value
) (filterAttrs (n: _: !(n == "_module")) cfg.configuration)
));
serverOptions.options = {
name = mkOption {
type = types.str;
description = ''
Value for label 'configname' which will be added to all metrics.
'';
};
server = mkOption {
type = types.str;
description = ''
Hostname of the server that should be probed.
'';
};
port = mkOption {
type = types.int;
example = 587;
description = ''
Port to use for SMTP.
'';
};
from = mkOption {
type = types.str;
example = "exporteruser@domain.tld";
description = ''
Content of 'From' Header for probing mails.
'';
};
to = mkOption {
type = types.str;
example = "exporteruser@domain.tld";
description = ''
Content of 'To' Header for probing mails.
'';
};
detectionDir = mkOption {
type = types.path;
example = "/var/spool/mail/exporteruser/new";
description = ''
Directory in which new mails for the exporter user are placed.
Note that this needs to exist when the exporter starts.
'';
};
login = mkOption {
type = types.nullOr types.str;
default = null;
example = "exporteruser@domain.tld";
description = ''
Username to use for SMTP authentication.
'';
};
passphrase = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
Password to use for SMTP authentication.
'';
};
};
exporterOptions.options = {
monitoringInterval = mkOption {
type = types.str;
example = "10s";
description = ''
Time interval between two probe attempts.
'';
};
mailCheckTimeout = mkOption {
type = types.str;
description = ''
Timeout until mails are considered "didn't make it".
'';
};
disableFileDeletion = mkOption {
type = types.bool;
default = false;
description = ''
Disables the exporter's function to delete probing mails.
'';
};
servers = mkOption {
type = types.listOf (types.submodule serverOptions);
default = [];
example = literalExample ''
[ {
name = "testserver";
server = "smtp.domain.tld";
port = 587;
from = "exporteruser@domain.tld";
to = "exporteruser@domain.tld";
detectionDir = "/path/to/Maildir/new";
} ]
'';
description = ''
List of servers that should be probed.
<emphasis>Note:</emphasis> if your mailserver has <citerefentry>
<refentrytitle>rspamd</refentrytitle><manvolnum>8</manvolnum></citerefentry> configured,
it can happen that emails from this exporter are marked as spam.
It's possible to work around the issue with a config like this:
<programlisting>
{
<link linkend="opt-services.rspamd.locals._name_.text">services.rspamd.locals."multimap.conf".text</link> = '''
ALLOWLIST_PROMETHEUS {
filter = "email:domain:tld";
type = "from";
map = "''${pkgs.writeText "allowmap" "domain.tld"}";
score = -100.0;
}
''';
}
</programlisting>
'';
};
};
in
{
port = 9225;
extraOpts = {
configFile = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
Specify the mailexporter configuration file to use.
'';
};
configuration = mkOption {
type = types.nullOr (types.submodule exporterOptions);
default = null;
description = ''
Specify the mailexporter configuration file to use.
'';
};
telemetryPath = mkOption {
type = types.str;
default = "/metrics";
description = ''
Path under which to expose metrics.
'';
};
};
serviceOpts = {
serviceConfig = {
DynamicUser = false;
ExecStart = ''
${pkgs.prometheus-mail-exporter}/bin/mailexporter \
--web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
--web.telemetry-path ${cfg.telemetryPath} \
--config.file ${
if cfg.configuration != null then configurationFile else (escapeShellArg cfg.configFile)
} \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
};
};
}
|