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|
{ config, lib, pkgs, options }:
with lib;
let
cfg = config.services.prometheus.exporters.rspamd;
prettyJSON = conf:
pkgs.runCommand "rspamd-exporter-config.yml" { } ''
echo '${builtins.toJSON conf}' | ${pkgs.buildPackages.jq}/bin/jq '.' > $out
'';
generateConfig = extraLabels: {
metrics = (map (path: {
name = "rspamd_${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 = "{ host = config.networking.hostName; }";
example = literalExample ''
{
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 ${prettyJSON (generateConfig cfg.extraLabels)} \
--web.listen-address "${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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