Mercurial > prosody-modules

annotate mod_prometheus/mod_prometheus.lua @ 4312:33a41503b9e3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Improve UX by providing defaults users expect
author Seve Ferrer <seve@delape.net>
date Tue, 22 Dec 2020 11:27:20 +0100
parents 343dc9dd70dd
children fb4a50bf60f1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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>
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
5 --
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
6 -- 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
7
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
8 module:set_global();
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
9
3128
a34e7bd87b39 mod_prometheus: Optimise global lookups.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3127
diff changeset
10 local tostring = tostring;
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
11 local t_insert = table.insert;
3128
a34e7bd87b39 mod_prometheus: Optimise global lookups.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3127
diff changeset
12 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
13 local socket = require "socket";
3138
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
14 local get_stats = require "core.statsmanager".get_stats;
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
15
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
16 local function escape(text)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
17 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
18 end
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_name(name)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
21 return name:gsub("[^A-Za-z0-9_]", "_"):gsub("^[^A-Za-z_]", "_%1");
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 get_timestamp()
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
25 -- 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
26 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
27 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
28
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
29 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
30 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
31 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
32 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
33
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
34 -- 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
35 -- 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
36 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
37 -- 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
38 -- return;
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
39 -- end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
40 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
41 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
42
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
43 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
44 return key.."=\""..escape(value).."\"";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
45 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
46
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
47 local function repr_labels(labels)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
48 local values = {}
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
49 for key, value in pairs(labels) do
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
50 t_insert(values, repr_label(escape_name(key), escape(value)));
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
51 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
52 if #values == 0 then
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
53 return "";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
54 end
3128
a34e7bd87b39 mod_prometheus: Optimise global lookups.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3127
diff changeset
55 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
56 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
57
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
58 local function repr_sample(metric, labels, value, timestamp)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
59 return escape_name(metric)..repr_labels(labels).." "..value.." "..timestamp.."\n";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
60 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
61
3149
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
62 local allowed_extras = { min = true, max = true, average = true };
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
63 local function insert_extras(data, key, name, timestamp, extra)
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
64 if not extra then
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
65 return false;
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
66 end
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
67 local has_extra = false;
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
68 for extra_name in pairs(allowed_extras) do
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
69 if extra[extra_name] then
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
70 local field = {
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
71 value = extra[extra_name],
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
72 labels = {
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
73 ["type"] = name,
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
74 field = extra_name,
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
75 },
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
76 typ = "gauge";
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
77 timestamp = timestamp,
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
78 };
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
79 t_insert(data[key], field);
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
80 has_extra = true;
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 end
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
83 return has_extra;
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
84 end
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
85
3138
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
86 local function parse_stats()
3134
99ac6dda9878 mod_prometheus: Move timestamp generation to the stats-update event.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3133
diff changeset
87 local timestamp = tostring(get_timestamp());
3138
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
88 local data = {};
3149
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
89 local stats, changed_only, extras = get_stats();
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
90 for stat, value in pairs(stats) do
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
91 -- module:log("debug", "changed_stats[%q] = %s", stat, tostring(value));
3149
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
92 local extra = extras[stat];
3138
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
93 local host, sect, name, typ = stat:match("^/([^/]+)/([^/]+)/(.+):(%a+)$");
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
94 if host == nil then
3131
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
95 sect, name, typ = stat:match("^([^.]+)%.(.+):(%a+)$");
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
96 elseif host == "*" then
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
97 host = nil;
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
98 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
99 if sect:find("^mod_measure_.") then
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
100 sect = sect:sub(13);
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
101 elseif sect:find("^mod_statistics_.") then
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
102 sect = sect:sub(16);
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
103 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
104
3133
321fd53a3191 mod_prometheus: Put the name as a label, which fits better the usual Prosody model.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3132
diff changeset
105 local key = escape_name("prosody_"..sect);
3131
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
106 local field = {
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
107 value = value,
3133
321fd53a3191 mod_prometheus: Put the name as a label, which fits better the usual Prosody model.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3132
diff changeset
108 labels = { ["type"] = name},
3131
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
109 -- TODO: Use the other types where it makes sense.
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
110 typ = (typ == "rate" and "counter" or "gauge"),
3134
99ac6dda9878 mod_prometheus: Move timestamp generation to the stats-update event.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3133
diff changeset
111 timestamp = timestamp,
3131
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
112 };
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
113 if host then
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
114 field.labels.host = host;
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
115 end
3131
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
116 if data[key] == nil then
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
117 data[key] = {};
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
118 end
3149
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
119 if not insert_extras(data, key, name, timestamp, extra) then
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
120 t_insert(data[key], field);
ccbfe7df02dc mod_prometheus: Expose min, max and average when available.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3138
diff changeset
121 end
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
122 end
3138
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
123 return data;
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
124 end
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
126 local function get_metrics(event)
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
127 local response = event.response;
3138
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
128 response.headers.content_type = "text/plain; version=0.0.4";
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
129
3127
36770ae1148f mod_prometheus: Don’t shadow variables. [luacheck]
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3126
diff changeset
130 local answer = {};
3138
9817e45a79e6 mod_prometheus: Fetch statistics at every request.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3134
diff changeset
131 for key, fields in pairs(parse_stats()) do
3131
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
132 t_insert(answer, repr_help(key, "TODO: add a description here."));
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
133 t_insert(answer, repr_type(key, fields[1].typ));
ddd39ca7b953 mod_prometheus: Change the storage model for one which matches Prometheus better.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3128
diff changeset
134 for _, field in pairs(fields) do
3134
99ac6dda9878 mod_prometheus: Move timestamp generation to the stats-update event.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3133
diff changeset
135 t_insert(answer, repr_sample(key, field.labels, field.value, field.timestamp));
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
136 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
137 end
3128
a34e7bd87b39 mod_prometheus: Optimise global lookups.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 3127
diff changeset
138 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
139 end
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
140
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
141 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
142 module:depends "http";
3125
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
143 module:provides("http", {
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
144 default_path = "metrics";
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
145 route = {
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
146 GET = get_metrics;
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
147 };
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
148 });
07a2ba55de4d mod_prometheus: Add a new statistics export module, for Prometheus.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
149 end