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{ config, lib, pkgs, options }:
with lib;
let
cfg = config.services.prometheus.exporters.rspamd;
mkFile = conf:
pkgs.writeText "rspamd-exporter-config.yml" (builtins.toJSON conf);
generateConfig = extraLabels: {
metrics = (map (path: {
name = "rspamd_${replaceStrings [ "[" "." " " "]" "\\" "'" ] [ "_" "_" "_" "" "" "" ] path}";
path = "{ .${path} }";
labels = extraLabels;
}) [
"actions['add\\ header']"
"actions['no\\ action']"
"actions['rewrite\\ subject']"
"actions['soft\\ reject']"
"actions.greylist"
"actions.reject"
"bytes_allocated"
"chunks_allocated"
"chunks_freed"
"chunks_oversized"
"connections"
"control_connections"
"ham_count"
"learned"
"pools_allocated"
"pools_freed"
"read_only"
"scanned"
"shared_chunks_allocated"
"spam_count"
"total_learns"
]) ++ [{
name = "rspamd_statfiles";
type = "object";
path = "{.statfiles[*]}";
labels = recursiveUpdate {
symbol = "{.symbol}";
type = "{.type}";
} extraLabels;
values = {
revision = "{.revision}";
size = "{.size}";
total = "{.total}";
used = "{.used}";
languages = "{.languages}";
users = "{.users}";
};
}];
};
in
{
port = 7980;
extraOpts = {
extraLabels = mkOption {
type = types.attrsOf types.str;
default = {
host = config.networking.hostName;
};
defaultText = literalExpression "{ host = config.networking.hostName; }";
example = literalExpression ''
{
host = config.networking.hostName;
custom_label = "some_value";
}
'';
description = "Set of labels added to each metric.";
};
};
serviceOpts.serviceConfig.ExecStart = ''
${pkgs.prometheus-json-exporter}/bin/json_exporter \
--config.file ${mkFile (generateConfig cfg.extraLabels)} \
--web.listen-address "${cfg.listenAddress}:${toString cfg.port}" \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
imports = [
(mkRemovedOptionModule [ "url" ] ''
This option was removed. The URL of the rspamd metrics endpoint
must now be provided to the exporter by prometheus via the url
parameter `target'.
In prometheus a scrape URL would look like this:
http://some.rspamd-exporter.host:7980/probe?target=http://some.rspamd.host:11334/stat
For more information, take a look at the official documentation
(https://github.com/prometheus-community/json_exporter) of the json_exporter.
'')
({ options.warnings = options.warnings; options.assertions = options.assertions; })
];
}
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