prosody
b8ce0f61855b
util/openmetrics.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/openmetrics.lua @ 12627:b8ce0f61855b

util.signal: Fix name conflict in Teal interface declaration
author Kim Alvefur <zash@zash.se>
date Wed, 10 Aug 2022 15:12:00 +0200
parent 12590:5eaf77114fdb
child 12817:176fd3ea505c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
1 --[[
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
2 This module implements a subset of the OpenMetrics Internet Draft version 00.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
3
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
4 URL: https://tools.ietf.org/html/draft-richih-opsawg-openmetrics-00
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
5
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
6 The following metric types are supported:
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
7
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
8 - Counter
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
9 - Gauge
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
10 - Histogram
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
11 - Summary
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
12
12387
05c250fa335a Spelling: Fix various spelling mistakes (thanks timeless)
Kim Alvefur <zash@zash.se>
parents: 11929
diff changeset
13 It is used by util.statsd and util.statistics to provide the OpenMetrics API.
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
14
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
15 To understand what this module is about, it is useful to familiarize oneself
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
16 with the terms MetricFamily, Metric, LabelSet, Label and MetricPoint as
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
17 defined in the I-D linked above.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
18 --]]
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
19 -- metric constructor interface:
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
20 -- metric_ctor(..., family_name, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
21
7988
dc758422d896 util.statistics,statsd,throttle,timer: Replace dependency on LuaSockect with util.time for precision time
Kim Alvefur <zash@zash.se>
parents: 6649
diff changeset
22 local time = require "util.time".now;
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
23 local select = select;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
24 local array = require "util.array";
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
25 local log = require "util.logger".init("util.openmetrics");
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
26 local new_multitable = require "util.multitable".new;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
27 local iter_multitable = require "util.multitable".iter;
11929
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
28 local t_concat, t_insert = table.concat, table.insert;
12590
5eaf77114fdb compat: Use table.pack (there since Lua 5.2) over our util.table
Kim Alvefur <zash@zash.se>
parents: 12589
diff changeset
29 local t_pack, t_unpack = table.pack, table.unpack;
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
31 -- BEGIN of Utility: "metric proxy"
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
32 -- This allows to wrap a MetricFamily in a proxy which only provides the
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
33 -- `with_labels` and `with_partial_label` methods. This allows to pre-set one
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
34 -- or more labels on a metric family. This is used in particular via
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
35 -- `with_partial_label` by the moduleapi in order to pre-set the `host` label
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
36 -- on metrics created in non-global modules.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
37 local metric_proxy_mt = {}
12535
7ef7abb72cdd util.openmetrics: Set __name field on metatables to improve error messages
Kim Alvefur <zash@zash.se>
parents: 12534
diff changeset
38 metric_proxy_mt.__name = "metric_proxy"
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
39 metric_proxy_mt.__index = metric_proxy_mt
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
40
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
41 local function new_metric_proxy(metric_family, with_labels_proxy_fun)
12534
3caff1f93520 util.openmetrics: Set (previously unused, empty) metatable
Kim Alvefur <zash@zash.se>
parents: 12387
diff changeset
42 return setmetatable({
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
43 _family = metric_family,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
44 with_labels = function(self, ...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
45 return with_labels_proxy_fun(self._family, ...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
46 end;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
47 with_partial_label = function(self, label)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
48 return new_metric_proxy(self._family, function(family, ...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
49 return family:with_labels(label, ...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
50 end)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
51 end
12534
3caff1f93520 util.openmetrics: Set (previously unused, empty) metatable
Kim Alvefur <zash@zash.se>
parents: 12387
diff changeset
52 }, metric_proxy_mt);
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
53 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
54
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
55 -- END of Utility: "metric proxy"
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
56
11929
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
57 -- BEGIN Rendering helper functions (internal)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
58
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
59 local function escape(text)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
60 return text:gsub("\\", "\\\\"):gsub("\"", "\\\""):gsub("\n", "\\n");
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
61 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
62
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
63 local function escape_name(name)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
64 return name:gsub("/", "__"):gsub("[^A-Za-z0-9_]", "_"):gsub("^[^A-Za-z_]", "_%1");
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
65 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
66
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
67 local function repr_help(metric, docstring)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
68 docstring = docstring:gsub("\\", "\\\\"):gsub("\n", "\\n");
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
69 return "# HELP "..escape_name(metric).." "..docstring.."\n";
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
70 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
71
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
72 local function repr_unit(metric, unit)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
73 if not unit then
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
74 unit = ""
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
75 else
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
76 unit = unit:gsub("\\", "\\\\"):gsub("\n", "\\n");
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
77 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
78 return "# UNIT "..escape_name(metric).." "..unit.."\n";
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
79 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
80
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
81 -- local allowed_types = { counter = true, gauge = true, histogram = true, summary = true, untyped = true };
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
82 -- local allowed_types = { "counter", "gauge", "histogram", "summary", "untyped" };
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
83 local function repr_type(metric, type_)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
84 -- if not allowed_types:contains(type_) then
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
85 -- return;
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
86 -- end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
87 return "# TYPE "..escape_name(metric).." "..type_.."\n";
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
88 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
89
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
90 local function repr_label(key, value)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
91 return key.."=\""..escape(value).."\"";
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
92 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
93
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
94 local function repr_labels(labelkeys, labelvalues, extra_labels)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
95 local values = {}
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
96 if labelkeys then
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
97 for i, key in ipairs(labelkeys) do
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
98 local value = labelvalues[i]
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
99 t_insert(values, repr_label(escape_name(key), escape(value)));
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
100 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
101 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
102 if extra_labels then
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
103 for key, value in pairs(extra_labels) do
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
104 t_insert(values, repr_label(escape_name(key), escape(value)));
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
105 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
106 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
107 if #values == 0 then
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
108 return "";
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
109 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
110 return "{"..t_concat(values, ",").."}";
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
111 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
112
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
113 local function repr_sample(metric, labelkeys, labelvalues, extra_labels, value)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
114 return escape_name(metric)..repr_labels(labelkeys, labelvalues, extra_labels).." "..string.format("%.17g", value).."\n";
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
115 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
116
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
117 -- END Rendering helper functions (internal)
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
118
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
119 local function render_histogram_le(v)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
120 if v == 1/0 then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
121 -- I-D-00: 4.1.2.2.1:
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
122 -- Exposers MUST produce output for positive infinity as +Inf.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
123 return "+Inf"
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
124 end
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
125
11593
0db763f3f3be util.openmetrics: Prettify format of histogram buckets
Kim Alvefur <zash@zash.se>
parents: 11523
diff changeset
126 return string.format("%.14g", v)
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
127 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
128
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
129 -- BEGIN of generic MetricFamily implementation
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
130
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
131 local metric_family_mt = {}
12535
7ef7abb72cdd util.openmetrics: Set __name field on metatables to improve error messages
Kim Alvefur <zash@zash.se>
parents: 12534
diff changeset
132 metric_family_mt.__name = "metric_family"
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
133 metric_family_mt.__index = metric_family_mt
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
134
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
135 local function histogram_metric_ctor(orig_ctor, buckets)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
136 return function(family_name, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
137 return orig_ctor(buckets, family_name, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
138 end
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
139 end
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
140
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
141 local function new_metric_family(backend, type_, family_name, unit, description, label_keys, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
142 local metric_ctor = assert(backend[type_], "statistics backend does not support "..type_.." metrics families")
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
143 local labels = label_keys or {}
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
144 local user_labels = #labels
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
145 if type_ == "histogram" then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
146 local buckets = extra and extra.buckets
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
147 if not buckets then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
148 error("no buckets given for histogram metric")
6555
7b2d16c14659 statsmanager, util.statistics: API changes, remove debugging
Matthew Wild <mwild1@gmail.com>
parents: 6553
diff changeset
149 end
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
150 buckets = array(buckets)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
151 buckets:push(1/0) -- must have +inf bucket
6555
7b2d16c14659 statsmanager, util.statistics: API changes, remove debugging
Matthew Wild <mwild1@gmail.com>
parents: 6553
diff changeset
152
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
153 metric_ctor = histogram_metric_ctor(metric_ctor, buckets)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
154 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
155
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
156 local data
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
157 if #labels == 0 then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
158 data = metric_ctor(family_name, nil, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
159 else
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
160 data = new_multitable()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
161 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
162
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
163 local mf = {
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
164 family_name = family_name,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
165 data = data,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
166 type_ = type_,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
167 unit = unit,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
168 description = description,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
169 user_labels = user_labels,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
170 label_keys = labels,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
171 extra = extra,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
172 _metric_ctor = metric_ctor,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
173 }
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
174 setmetatable(mf, metric_family_mt);
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
175 return mf
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
176 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
177
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
178 function metric_family_mt:new_metric(labels)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
179 return self._metric_ctor(self.family_name, labels, self.extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
180 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
181
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
182 function metric_family_mt:clear()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
183 for _, metric in self:iter_metrics() do
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
184 metric:reset()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
185 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
186 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
187
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
188 function metric_family_mt:with_labels(...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
189 local count = select('#', ...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
190 if count ~= self.user_labels then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
191 error("number of labels passed to with_labels does not match number of label keys")
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
192 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
193 if count == 0 then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
194 return self.data
6555
7b2d16c14659 statsmanager, util.statistics: API changes, remove debugging
Matthew Wild <mwild1@gmail.com>
parents: 6553
diff changeset
195 end
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
196 local metric = self.data:get(...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
197 if not metric then
11600
a02c277eb97a util.openmetrics: Use pack from util.table, detect appropriate unpack for Lua 5.1 (thanks sups)
Matthew Wild <mwild1@gmail.com>
parents: 11593
diff changeset
198 local values = t_pack(...)
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
199 metric = self:new_metric(values)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
200 values[values.n+1] = metric
11600
a02c277eb97a util.openmetrics: Use pack from util.table, detect appropriate unpack for Lua 5.1 (thanks sups)
Matthew Wild <mwild1@gmail.com>
parents: 11593
diff changeset
201 self.data:set(t_unpack(values, 1, values.n+1))
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
202 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
203 return metric
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
204 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
205
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
206 function metric_family_mt:with_partial_label(label)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
207 return new_metric_proxy(self, function (family, ...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
208 return family:with_labels(label, ...)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
209 end)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
210 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
211
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
212 function metric_family_mt:iter_metrics()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
213 if #self.label_keys == 0 then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
214 local done = false
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
215 return function()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
216 if done then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
217 return nil
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
218 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
219 done = true
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
220 return {}, self.data
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
221 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
222 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
223 local searchkeys = {};
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
224 local nlabels = #self.label_keys
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
225 for i=1,nlabels do
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
226 searchkeys[i] = nil;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
227 end
11600
a02c277eb97a util.openmetrics: Use pack from util.table, detect appropriate unpack for Lua 5.1 (thanks sups)
Matthew Wild <mwild1@gmail.com>
parents: 11593
diff changeset
228 local it, state = iter_multitable(self.data, t_unpack(searchkeys, 1, nlabels))
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
229 return function(_s)
11600
a02c277eb97a util.openmetrics: Use pack from util.table, detect appropriate unpack for Lua 5.1 (thanks sups)
Matthew Wild <mwild1@gmail.com>
parents: 11593
diff changeset
230 local label_values = t_pack(it(_s))
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
231 if label_values.n == 0 then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
232 return nil, nil
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
233 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
234 local metric = label_values[label_values.n]
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
235 label_values[label_values.n] = nil
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
236 label_values.n = label_values.n - 1
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
237 return label_values, metric
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
238 end, state
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
239 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
240
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
241 -- END of generic MetricFamily implementation
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
242
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
243 -- BEGIN of MetricRegistry implementation
6555
7b2d16c14659 statsmanager, util.statistics: API changes, remove debugging
Matthew Wild <mwild1@gmail.com>
parents: 6553
diff changeset
244
7b2d16c14659 statsmanager, util.statistics: API changes, remove debugging
Matthew Wild <mwild1@gmail.com>
parents: 6553
diff changeset
245
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
246 -- Helper to test whether two metrics are "equal".
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
247 local function equal_metric_family(mf1, mf2)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
248 if mf1.type_ ~= mf2.type_ then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
249 return false
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
250 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
251 if #mf1.label_keys ~= #mf2.label_keys then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
252 return false
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
253 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
254 -- Ignoring unit here because in general it'll be part of the name anyway
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
255 -- So either the unit was moved into/out of the name (which is a valid)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
256 -- thing to do on an upgrade or we would expect not to see any conflicts
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
257 -- anyway.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
258 --[[
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
259 if mf1.unit ~= mf2.unit then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
260 return false
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
261 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
262 ]]
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
263 for i, key in ipairs(mf1.label_keys) do
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
264 if key ~= mf2.label_keys[i] then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
265 return false
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
266 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
267 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
268 return true
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
269 end
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
270
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
271 -- If the unit is not empty, add it to the full name as per the I-D spec.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
272 local function compose_name(name, unit)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
273 local full_name = name
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
274 if unit and unit ~= "" then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
275 full_name = full_name .. "_" .. unit
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
276 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
277 -- TODO: prohibit certain suffixes used by metrics if where they may cause
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
278 -- conflicts
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
279 return full_name
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
280 end
6555
7b2d16c14659 statsmanager, util.statistics: API changes, remove debugging
Matthew Wild <mwild1@gmail.com>
parents: 6553
diff changeset
281
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
282 local metric_registry_mt = {}
12535
7ef7abb72cdd util.openmetrics: Set __name field on metatables to improve error messages
Kim Alvefur <zash@zash.se>
parents: 12534
diff changeset
283 metric_registry_mt.__name = "metric_registry"
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
284 metric_registry_mt.__index = metric_registry_mt
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
285
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
286 local function new_metric_registry(backend)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
287 local reg = {
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
288 families = {},
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
289 backend = backend,
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
290 }
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
291 setmetatable(reg, metric_registry_mt)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
292 return reg
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
293 end
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
294
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
295 function metric_registry_mt:register_metric_family(name, metric_family)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
296 local existing = self.families[name];
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
297 if existing then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
298 if not equal_metric_family(metric_family, existing) then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
299 -- We could either be strict about this, or replace the
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
300 -- existing metric family with the new one.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
301 -- Being strict is nice to avoid programming errors /
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
302 -- conflicts, but causes issues when a new version of a module
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
303 -- is loaded.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
304 --
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
305 -- We will thus assume that the new metric is the correct one;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
306 -- That is probably OK because unless you're reaching down into
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
307 -- the util.openmetrics or core.statsmanager API, your metric
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
308 -- name is going to be scoped to `prosody_mod_$modulename`
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
309 -- anyway and the damage is thus controlled.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
310 --
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
311 -- To make debugging such issues easier, we still log.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
312 log("debug", "replacing incompatible existing metric family %s", name)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
313 -- Below is the code to be strict.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
314 --error("conflicting declarations for metric family "..name)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
315 else
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
316 return existing
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
317 end
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
318 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
319 self.families[name] = metric_family
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
320 return metric_family
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
321 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
322
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
323 function metric_registry_mt:gauge(name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
324 name = compose_name(name, unit)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
325 local mf = new_metric_family(self.backend, "gauge", name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
326 mf = self:register_metric_family(name, mf)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
327 return mf
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
328 end
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
329
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
330 function metric_registry_mt:counter(name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
331 name = compose_name(name, unit)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
332 local mf = new_metric_family(self.backend, "counter", name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
333 mf = self:register_metric_family(name, mf)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
334 return mf
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
335 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
336
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
337 function metric_registry_mt:histogram(name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
338 name = compose_name(name, unit)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
339 local mf = new_metric_family(self.backend, "histogram", name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
340 mf = self:register_metric_family(name, mf)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
341 return mf
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
342 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
343
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
344 function metric_registry_mt:summary(name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
345 name = compose_name(name, unit)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
346 local mf = new_metric_family(self.backend, "summary", name, unit, description, labels, extra)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
347 mf = self:register_metric_family(name, mf)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
348 return mf
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
349 end
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
350
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
351 function metric_registry_mt:get_metric_families()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
352 return self.families
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
353 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
354
11929
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
355 function metric_registry_mt:render()
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
356 local answer = {};
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
357 for metric_family_name, metric_family in pairs(self:get_metric_families()) do
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
358 t_insert(answer, repr_help(metric_family_name, metric_family.description))
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
359 t_insert(answer, repr_unit(metric_family_name, metric_family.unit))
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
360 t_insert(answer, repr_type(metric_family_name, metric_family.type_))
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
361 for labelset, metric in metric_family:iter_metrics() do
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
362 for suffix, extra_labels, value in metric:iter_samples() do
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
363 t_insert(answer, repr_sample(metric_family_name..suffix, metric_family.label_keys, labelset, extra_labels, value))
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
364 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
365 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
366 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
367 t_insert(answer, "# EOF\n")
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
368 return t_concat(answer, "");
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
369 end
85d51bfcf56b mod_http_openmetrics: Imported from prosody-modules mod_prometheus @df2246b15075
Matthew Wild <mwild1@gmail.com>
parents: 11600
diff changeset
370
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
371 -- END of MetricRegistry implementation
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
372
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
373 -- BEGIN of general helpers for implementing high-level APIs on top of OpenMetrics
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
374
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
375 local function timed(metric)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
376 local t0 = time()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
377 local submitter = assert(metric.sample or metric.set, "metric type cannot be used with timed()")
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
378 return function()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
379 local t1 = time()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
380 submitter(metric, t1-t0)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
381 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
382 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
383
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
384 -- END of general helpers
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
385
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
386 return {
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
387 new_metric_proxy = new_metric_proxy;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
388 new_metric_registry = new_metric_registry;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
389 render_histogram_le = render_histogram_le;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 10883
diff changeset
390 timed = timed;
6553
0e29c05c3503 util.statistics: New library for gathering various kinds of statistics
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
391 }