File

plugins/mod_http_openmetrics.lua @ 13055:e732f9dfdfc8

mod_mam: port to use util.human.io.parse_duration Updated by Zash, the original patch by Jonas had put the duration parsing function in util.datetime but MattJ later did the same thing but differently in f4d7fe919969
author Jonas Schäfer <jonas@wielicki.name>
date Thu, 28 Apr 2022 20:38:40 +0200
parent 12977:74b9e05af71e
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-- Export statistics in OpenMetrics format
--
-- Copyright (C) 2014 Daurnimator
-- Copyright (C) 2018 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
-- Copyright (C) 2021 Jonas Schäfer <jonas@zombofant.net>
--
-- This module is MIT/X11 licensed.

module:set_global();

local statsman = require "prosody.core.statsmanager";
local ip = require "prosody.util.ip";

local get_metric_registry = statsman.get_metric_registry;
local collect = statsman.collect;

local get_metrics;

local permitted_ips = module:get_option_set("openmetrics_allow_ips", { "::1", "127.0.0.1" });
local permitted_cidr = module:get_option_string("openmetrics_allow_cidr");

local function is_permitted(request)
	local ip_raw = request.ip;
	if permitted_ips:contains(ip_raw) or
	   (permitted_cidr and ip.match(ip.new_ip(ip_raw), ip.parse_cidr(permitted_cidr))) then
		return true;
	end
	return false;
end

function get_metrics(event)
	if not is_permitted(event.request) then
		return 403; -- Forbidden
	end

	local response = event.response;
	response.headers.content_type = "application/openmetrics-text; version=0.0.4";

	if collect then
		-- Ensure to get up-to-date samples when running in manual mode
		collect()
	end

	local registry = get_metric_registry()
	if registry == nil then
		response.headers.content_type = "text/plain; charset=utf-8"
		response.status_code = 404
		return "No statistics provider configured\n"
	end

	return registry:render();
end

module:depends "http";
module:provides("http", {
	default_path = "metrics";
	route = {
		GET = get_metrics;
	};
});