diff options
Diffstat (limited to 'nixos/modules/services/monitoring/prometheus/exporters/mail.nix')
-rw-r--r-- | nixos/modules/services/monitoring/prometheus/exporters/mail.nix | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/mail.nix b/nixos/modules/services/monitoring/prometheus/exporters/mail.nix new file mode 100644 index 00000000000..956bd96aa45 --- /dev/null +++ b/nixos/modules/services/monitoring/prometheus/exporters/mail.nix @@ -0,0 +1,176 @@ +{ 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 = literalExpression '' + [ { + 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} + ''; + }; + }; +} |