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annotate plugins/mod_http_openmetrics.lua @ 13920:2169be3581ae 13.0

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migrator: Allow migrating between different configs of the same driver This was notably a problem with SQL since mod_storage_sql is a single module that connects to different SQL databases. The problem was that since it was already loaded once, the output configuration was not applied and it would have migrated to the origin database. This essentially reloads the module after updating the configuration, which should work with all storage modules as long as everything they need are kept in the 'provider' or driver table.
author Kim Alvefur <zash@zash.se>
date Sun, 03 Aug 2025 15:14:20 +0200
parents 74b9e05af71e
children
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1 -- Export statistics in OpenMetrics format
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2 --
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3 -- Copyright (C) 2014 Daurnimator
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4 -- Copyright (C) 2018 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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5 -- Copyright (C) 2021 Jonas Schäfer <jonas@zombofant.net>
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6 --
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7 -- This module is MIT/X11 licensed.
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9 module:set_global();
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10
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11 local statsman = require "prosody.core.statsmanager";
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12 local ip = require "prosody.util.ip";
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13
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14 local get_metric_registry = statsman.get_metric_registry;
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15 local collect = statsman.collect;
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16
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17 local get_metrics;
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19 local permitted_ips = module:get_option_set("openmetrics_allow_ips", { "::1", "127.0.0.1" });
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20 local permitted_cidr = module:get_option_string("openmetrics_allow_cidr");
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21
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22 local function is_permitted(request)
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23 local ip_raw = request.ip;
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24 if permitted_ips:contains(ip_raw) or
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25 (permitted_cidr and ip.match(ip.new_ip(ip_raw), ip.parse_cidr(permitted_cidr))) then
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26 return true;
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27 end
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28 return false;
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29 end
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31 function get_metrics(event)
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32 if not is_permitted(event.request) then
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33 return 403; -- Forbidden
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34 end
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35
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36 local response = event.response;
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37 response.headers.content_type = "application/openmetrics-text; version=0.0.4";
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38
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39 if collect then
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40 -- Ensure to get up-to-date samples when running in manual mode
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41 collect()
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42 end
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43
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44 local registry = get_metric_registry()
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45 if registry == nil then
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46 response.headers.content_type = "text/plain; charset=utf-8"
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47 response.status_code = 404
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48 return "No statistics provider configured\n"
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49 end
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50
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51 return registry:render();
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52 end
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53
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54 module:depends "http";
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55 module:provides("http", {
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56 default_path = "metrics";
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57 route = {
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58 GET = get_metrics;
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59 };
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60 });