prosody-modules: mod_prometheus/mod_prometheus.lua annotate

annotate mod_prometheus/mod_prometheus.lua @ 5119:048e339706ba

mod_rest: Remove manual reference expansion in schema This hack was originally added to reduce the number of definitions of common attributes (type, to, from etc) and payloads (e.g. delay). This predated pointers and references, and until now was needed because parsing picked out the correct stanza kind from the schema, which broke internal references. Removing this hack paves the way for allowing the schema to be configured or customized more easily.

author	Kim Alvefur <zash@zash.se>
date	Tue, 20 Dec 2022 21:48:28 +0100
parents	c406e4bf7ee5
children

rev	line source
3132 4ef28b6b4e87 mod_prometheus: Add my copyright. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 3131 diff changeset	1 -- Log statistics to Prometheus
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	2 --
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	3 -- Copyright (C) 2014 Daurnimator
3132 4ef28b6b4e87 mod_prometheus: Add my copyright. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 3131 diff changeset	4 -- Copyright (C) 2018 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
4544 64fa2dd34d43 mod_prometheus: remove space between label k/v pairs Jonas Schäfer <jonas@wielicki.name> parents: 4542 diff changeset	5 -- Copyright (C) 2021 Jonas Schäfer <jonas@zombofant.net>
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	6 --
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	7 -- This module is MIT/X11 licensed.
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	8
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	9 module:set_global();
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	10
3128 a34e7bd87b39 mod_prometheus: Optimise global lookups. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 3127 diff changeset	11 local tostring = tostring;
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	12 local t_insert = table.insert;
3128 a34e7bd87b39 mod_prometheus: Optimise global lookups. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 3127 diff changeset	13 local t_concat = table.concat;
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	14 local socket = require "socket";
4542 fb4a50bf60f1 mod_prometheus: Invoke stats collection if in 'manual' mode Kim Alvefur <zash@zash.se> parents: 3952 diff changeset	15 local statsman = require "core.statsmanager";
fb4a50bf60f1 mod_prometheus: Invoke stats collection if in 'manual' mode Kim Alvefur <zash@zash.se> parents: 3952 diff changeset	16 local get_stats = statsman.get_stats;
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	17 local get_metric_registry = statsman.get_metric_registry;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	18 local collect = statsman.collect;
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	19
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	20 local function escape(text)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	21 return text:gsub("\\", "\\\\"):gsub("\"", "\\\""):gsub("\n", "\\n");
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	22 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	23
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	24 local function escape_name(name)
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	25 return name:gsub("/", "__"):gsub("[^A-Za-z0-9_]", "_"):gsub("^[^A-Za-z_]", "_%1");
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	26 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	27
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	28 local function get_timestamp()
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	29 -- Using LuaSocket for that because os.time() only has second precision.
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	30 return math.floor(socket.gettime() * 1000);
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	31 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	32
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	33 local function repr_help(metric, docstring)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	34 docstring = docstring:gsub("\\", "\\\\"):gsub("\n", "\\n");
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	35 return "# HELP "..escape_name(metric).." "..docstring.."\n";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	36 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	37
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	38 local function repr_unit(metric, unit)
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	39 if not unit then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	40 unit = ""
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	41 else
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	42 unit = unit:gsub("\\", "\\\\"):gsub("\n", "\\n");
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	43 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	44 return "# UNIT "..escape_name(metric).." "..unit.."\n";
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	45 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	46
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	47 -- local allowed_types = { counter = true, gauge = true, histogram = true, summary = true, untyped = true };
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	48 -- local allowed_types = { "counter", "gauge", "histogram", "summary", "untyped" };
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	49 local function repr_type(metric, type_)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	50 -- if not allowed_types:contains(type_) then
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	51 -- return;
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	52 -- end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	53 return "# TYPE "..escape_name(metric).." "..type_.."\n";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	54 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	55
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	56 local function repr_label(key, value)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	57 return key.."=\""..escape(value).."\"";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	58 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	59
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	60 local function repr_labels(labelkeys, labelvalues, extra_labels)
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	61 local values = {}
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	62 if labelkeys then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	63 for i, key in ipairs(labelkeys) do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	64 local value = labelvalues[i]
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	65 t_insert(values, repr_label(escape_name(key), escape(value)));
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	66 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	67 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	68 if extra_labels then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	69 for key, value in pairs(extra_labels) do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	70 t_insert(values, repr_label(escape_name(key), escape(value)));
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	71 end
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	72 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	73 if #values == 0 then
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	74 return "";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	75 end
4544 64fa2dd34d43 mod_prometheus: remove space between label k/v pairs Jonas Schäfer <jonas@wielicki.name> parents: 4542 diff changeset	76 return "{"..t_concat(values, ",").."}";
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	77 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	78
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	79 local function repr_sample(metric, labelkeys, labelvalues, extra_labels, value)
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	80 return escape_name(metric)..repr_labels(labelkeys, labelvalues, extra_labels).." "..string.format("%.17g", value).."\n";
3149 ccbfe7df02dc mod_prometheus: Expose min, max and average when available. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 3138 diff changeset	81 end
ccbfe7df02dc mod_prometheus: Expose min, max and average when available. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 3138 diff changeset	82
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	83 local get_metrics;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	84 if statsman.get_metric_registry then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	85 module:log("debug", "detected OpenMetrics statsmanager")
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	86 -- Prosody 0.12+ with OpenMetrics
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	87 function get_metrics(event)
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	88 local response = event.response;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	89 response.headers.content_type = "application/openmetrics-text; version=0.0.4";
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	90
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	91 if collect then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	92 -- Ensure to get up-to-date samples when running in manual mode
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	93 collect()
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	94 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	95
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	96 local registry = get_metric_registry()
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	97 if registry == nil then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	98 response.headers.content_type = "text/plain; charset=utf-8"
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	99 response.status_code = 404
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	100 return "No statistics provider configured\n"
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	101 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	102 local answer = {};
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	103 for metric_family_name, metric_family in pairs(registry:get_metric_families()) do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	104 t_insert(answer, repr_help(metric_family_name, metric_family.description))
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	105 t_insert(answer, repr_unit(metric_family_name, metric_family.unit))
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	106 t_insert(answer, repr_type(metric_family_name, metric_family.type_))
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	107 for labelset, metric in metric_family:iter_metrics() do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	108 for suffix, extra_labels, value in metric:iter_samples() do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	109 t_insert(answer, repr_sample(metric_family_name..suffix, metric_family.label_keys, labelset, extra_labels, value))
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	110 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	111 end
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	112 end
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	113 t_insert(answer, "# EOF\n")
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	114 return t_concat(answer, "");
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	115 end
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	116 else
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	117 module:log("debug", "detected pre-OpenMetrics statsmanager")
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	118 -- Pre-OpenMetrics
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	119
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	120 local allowed_extras = { min = true, max = true, average = true };
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	121 local function insert_extras(data, key, name, timestamp, extra)
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	122 if not extra then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	123 return false;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	124 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	125 local has_extra = false;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	126 for extra_name in pairs(allowed_extras) do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	127 if extra[extra_name] then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	128 local field = {
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	129 value = extra[extra_name],
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	130 labels = {
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	131 ["type"] = name,
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	132 field = extra_name,
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	133 },
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	134 typ = "gauge";
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	135 timestamp = timestamp,
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	136 };
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	137 t_insert(data[key], field);
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	138 has_extra = true;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	139 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	140 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	141 return has_extra;
4542 fb4a50bf60f1 mod_prometheus: Invoke stats collection if in 'manual' mode Kim Alvefur <zash@zash.se> parents: 3952 diff changeset	142 end
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	143
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	144 local function parse_stats()
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	145 local timestamp = tostring(get_timestamp());
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	146 local data = {};
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	147 local stats, changed_only, extras = get_stats();
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	148 for stat, value in pairs(stats) do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	149 -- module:log("debug", "changed_stats[%q] = %s", stat, tostring(value));
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	150 local extra = extras[stat];
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	151 local host, sect, name, typ = stat:match("^/([^/]+)/([^/]+)/(.+):(%a+)$");
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	152 if host == nil then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	153 sect, name, typ = stat:match("^([^.]+)%.(.+):(%a+)$");
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	154 elseif host == "*" then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	155 host = nil;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	156 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	157 if sect:find("^mod_measure_.") then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	158 sect = sect:sub(13);
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	159 elseif sect:find("^mod_statistics_.") then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	160 sect = sect:sub(16);
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	161 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	162
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	163 local key = escape_name("prosody_"..sect);
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	164 local field = {
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	165 value = value,
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	166 labels = { ["type"] = name},
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	167 -- TODO: Use the other types where it makes sense.
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	168 typ = (typ == "rate" and "counter" or "gauge"),
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	169 timestamp = timestamp,
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	170 };
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	171 if host then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	172 field.labels.host = host;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	173 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	174 if data[key] == nil then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	175 data[key] = {};
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	176 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	177 if not insert_extras(data, key, name, timestamp, extra) then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	178 t_insert(data[key], field);
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	179 end
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	180 end
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	181 return data;
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	182 end
4555 1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	183
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	184 function get_metrics(event)
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	185 local response = event.response;
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	186 response.headers.content_type = "text/plain; version=0.0.4";
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	187 if statsman.collect then
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	188 statsman.collect()
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	189 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	190
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	191 local answer = {};
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	192 for key, fields in pairs(parse_stats()) do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	193 t_insert(answer, repr_help(key, ""));
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	194 t_insert(answer, repr_type(key, fields[1].typ));
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	195 for _, field in pairs(fields) do
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	196 t_insert(answer, repr_sample(key, nil, nil, field.labels, field.value, field.timestamp));
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	197 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	198 end
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	199 return t_concat(answer, "");
1e70538e4641 mod_prometheus: Port to new OpenMetrics based statistics module Jonas Schäfer <jonas@wielicki.name> parents: 4544 diff changeset	200 end
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	201 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	202
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	203 function module.add_host(module)
3952 343dc9dd70dd mod_prometheus: Ensure mod_http is loaded where the http interface is exposed (thanks Martin) Kim Alvefur <zash@zash.se> parents: 3149 diff changeset	204 module:depends "http";
3125 07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	205 module:provides("http", {
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	206 default_path = "metrics";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	207 route = {
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	208 GET = get_metrics;
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	209 };
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	210 });
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: diff changeset	211 end

Mercurial > prosody-modules

annotate mod_prometheus/mod_prometheus.lua @ 5119:048e339706ba