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|
{ config, lib, pkgs, options }:
with lib;
let
cfg = config.services.prometheus.exporters.dovecot;
in
{
port = 9166;
extraOpts = {
telemetryPath = mkOption {
type = types.str;
default = "/metrics";
description = ''
Path under which to expose metrics.
'';
};
socketPath = mkOption {
type = types.path;
default = "/var/run/dovecot/stats";
example = "/var/run/dovecot2/old-stats";
description = ''
Path under which the stats socket is placed.
The user/group under which the exporter runs,
should be able to access the socket in order
to scrape the metrics successfully.
Please keep in mind that the stats module has changed in
<link xlink:href="https://wiki2.dovecot.org/Upgrading/2.3">Dovecot 2.3+</link> which
is not <link xlink:href="https://github.com/kumina/dovecot_exporter/issues/8">compatible with this exporter</link>.
The following extra config has to be passed to Dovecot to ensure that recent versions
work with this exporter:
<programlisting>
{
<xref linkend="opt-services.prometheus.exporters.dovecot.enable" /> = true;
<xref linkend="opt-services.prometheus.exporters.dovecot.socketPath" /> = "/var/run/dovecot2/old-stats";
<xref linkend="opt-services.dovecot2.mailPlugins.globally.enable" /> = [ "old_stats" ];
<xref linkend="opt-services.dovecot2.extraConfig" /> = '''
service old-stats {
unix_listener old-stats {
user = dovecot-exporter
group = dovecot-exporter
mode = 0660
}
fifo_listener old-stats-mail {
mode = 0660
user = dovecot
group = dovecot
}
fifo_listener old-stats-user {
mode = 0660
user = dovecot
group = dovecot
}
}
plugin {
old_stats_refresh = 30 secs
old_stats_track_cmds = yes
}
''';
}
</programlisting>
'';
};
scopes = mkOption {
type = types.listOf types.str;
default = [ "user" ];
example = [ "user" "global" ];
description = ''
Stats scopes to query.
'';
};
};
serviceOpts = {
serviceConfig = {
DynamicUser = false;
ExecStart = ''
${pkgs.prometheus-dovecot-exporter}/bin/dovecot_exporter \
--web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
--web.telemetry-path ${cfg.telemetryPath} \
--dovecot.socket-path ${escapeShellArg cfg.socketPath} \
--dovecot.scopes ${concatStringsSep "," cfg.scopes} \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
};
};
}
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