prosody
ead41e25ebc0
core/statsmanager.lua

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core/statsmanager.lua @ 12972:ead41e25ebc0

core: Prefix module imports with prosody namespace
author Kim Alvefur <zash@zash.se>
date Fri, 17 Mar 2023 16:23:07 +0100
parent 11575:76d32b2ca5eb
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rev   line source
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1
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2 local config = require "prosody.core.configmanager";
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3 local log = require "prosody.util.logger".init("stats");
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4 local timer = require "prosody.util.timer";
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5 local fire_event = prosody.events.fire_event;
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6 local array = require "prosody.util.array";
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7 local timed = require "prosody.util.openmetrics".timed;
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9 local stats_interval_config = config.get("*", "statistics_interval");
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10 local stats_interval = tonumber(stats_interval_config);
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11 if stats_interval_config and not stats_interval and stats_interval_config ~= "manual" then
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12 log("error", "Invalid 'statistics_interval' setting, statistics will be disabled");
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13 end
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15 local stats_provider_name;
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16 local stats_provider_config = config.get("*", "statistics");
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17 local stats_provider = stats_provider_config;
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19 if not stats_provider and stats_interval then
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20 stats_provider = "internal";
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21 elseif stats_provider and not stats_interval then
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22 stats_interval = 60;
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23 end
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24 if stats_interval_config == "manual" then
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25 stats_interval = nil;
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26 end
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28 local builtin_providers = {
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29 internal = "prosody.util.statistics";
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30 statsd = "prosody.util.statsd";
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31 };
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34 local stats, stats_err = false, nil;
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36 if stats_provider then
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37 if stats_provider:sub(1,1) == ":" then
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38 stats_provider = stats_provider:sub(2);
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39 stats_provider_name = "external "..stats_provider;
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40 elseif stats_provider then
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41 stats_provider_name = "built-in "..stats_provider;
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42 stats_provider = builtin_providers[stats_provider];
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43 if not stats_provider then
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44 log("error", "Unrecognized statistics provider '%s', statistics will be disabled", stats_provider_config);
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45 end
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46 end
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47
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48 local have_stats_provider, stats_lib = pcall(require, stats_provider);
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49 if not have_stats_provider then
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50 stats, stats_err = nil, stats_lib;
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51 else
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52 local stats_config = config.get("*", "statistics_config");
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53 stats, stats_err = stats_lib.new(stats_config);
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54 stats_provider_name = stats_lib._NAME or stats_provider_name;
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55 end
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56 end
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57
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58 if stats == nil then
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59 log("error", "Error loading statistics provider '%s': %s", stats_provider, stats_err);
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60 end
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61
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62 local measure, collect, metric, cork, uncork;
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63
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64 if stats then
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65 function metric(type_, name, unit, description, labels, extra)
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66 local registry = stats.metric_registry
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67 local f = assert(registry[type_], "unknown metric family type: "..type_);
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68 return f(registry, name, unit or "", description or "", labels, extra);
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69 end
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70
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71 local function new_legacy_metric(stat_type, name, unit, description, fixed_label_key, fixed_label_value, extra)
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72 local label_keys = array()
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73 local conf = extra or {}
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74 if fixed_label_key then
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75 label_keys:push(fixed_label_key)
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76 end
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77 unit = unit or ""
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78 local mf = metric(stat_type, "prosody_" .. name, unit, description, label_keys, conf);
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79 if fixed_label_key then
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80 mf = mf:with_partial_label(fixed_label_value)
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81 end
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82 return mf:with_labels()
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83 end
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84
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85 local function unwrap_legacy_extra(extra, type_, name, unit)
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86 local description = extra and extra.description or name.." "..type_
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87 unit = extra and extra.unit or unit
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88 return description, unit
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89 end
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90
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91 -- These wrappers provide the pre-OpenMetrics interface of statsmanager
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92 -- and moduleapi (module:measure).
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93 local legacy_metric_wrappers = {
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94 amount = function(name, fixed_label_key, fixed_label_value, extra)
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95 local initial = 0
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96 if type(extra) == "number" then
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97 initial = extra
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98 else
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99 initial = extra and extra.initial or initial
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100 end
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101 local description, unit = unwrap_legacy_extra(extra, "amount", name)
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102
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103 local m = new_legacy_metric("gauge", name, unit, description, fixed_label_key, fixed_label_value)
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104 m:set(initial or 0)
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105 return function(v)
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106 m:set(v)
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107 end
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108 end;
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109
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110 counter = function(name, fixed_label_key, fixed_label_value, extra)
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111 if type(extra) == "number" then
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112 -- previous versions of the API allowed passing an initial
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113 -- value here; we do not allow that anymore, it is not a thing
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114 -- which makes sense with counters
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115 extra = nil
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116 end
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117
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118 local description, unit = unwrap_legacy_extra(extra, "counter", name)
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119
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120 local m = new_legacy_metric("counter", name, unit, description, fixed_label_key, fixed_label_value)
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diff changeset
121 m:set(0)
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parents: 11515
diff changeset
122 return function(v)
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parents: 11515
diff changeset
123 m:add(v)
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diff changeset
124 end
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125 end;
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diff changeset
126
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diff changeset
127 rate = function(name, fixed_label_key, fixed_label_value, extra)
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128 if type(extra) == "number" then
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diff changeset
129 -- previous versions of the API allowed passing an initial
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parents: 11515
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130 -- value here; we do not allow that anymore, it is not a thing
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131 -- which makes sense with counters
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132 extra = nil
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133 end
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134
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135 local description, unit = unwrap_legacy_extra(extra, "counter", name)
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parents: 11515
diff changeset
136
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137 local m = new_legacy_metric("counter", name, unit, description, fixed_label_key, fixed_label_value)
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138 m:set(0)
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139 return function()
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140 m:add(1)
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diff changeset
141 end
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142 end;
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143
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144 times = function(name, fixed_label_key, fixed_label_value, extra)
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145 local conf = {}
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146 if extra and extra.buckets then
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147 conf.buckets = extra.buckets
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148 else
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149 conf.buckets = { 0.001, 0.01, 0.1, 1.0, 10.0, 100.0 }
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150 end
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151 local description, _ = unwrap_legacy_extra(extra, "times", name)
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152
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153 local m = new_legacy_metric("histogram", name, "seconds", description, fixed_label_key, fixed_label_value, conf)
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154 return function()
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155 return timed(m)
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156 end
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157 end;
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158
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159 sizes = function(name, fixed_label_key, fixed_label_value, extra)
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160 local conf = {}
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161 if extra and extra.buckets then
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162 conf.buckets = extra.buckets
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163 else
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164 conf.buckets = { 1024, 4096, 32768, 131072, 1048576, 4194304, 33554432, 134217728, 1073741824 }
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165 end
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166 local description, _ = unwrap_legacy_extra(extra, "sizes", name)
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diff changeset
167
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168 local m = new_legacy_metric("histogram", name, "bytes", description, fixed_label_key, fixed_label_value, conf)
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169 return function(v)
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170 m:sample(v)
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171 end
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172 end;
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173
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174 distribution = function(name, fixed_label_key, fixed_label_value, extra)
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175 if type(extra) == "string" then
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176 -- compat with previous API
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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177 extra = { unit = extra }
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178 end
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179 local description, unit = unwrap_legacy_extra(extra, "distribution", name, "")
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180 local m = new_legacy_metric("summary", name, unit, description, fixed_label_key, fixed_label_value)
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181 return function(v)
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182 m:sample(v)
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diff changeset
183 end
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184 end;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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185 };
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186
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187 -- Argument order switched here to support the legacy statsmanager.measure
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diff changeset
188 -- interface.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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parents: 11515
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189 function measure(stat_type, name, extra, fixed_label_key, fixed_label_value)
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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parents: 11515
diff changeset
190 local wrapper = assert(legacy_metric_wrappers[stat_type], "unknown legacy metric type "..stat_type)
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diff changeset
191 return wrapper(name, fixed_label_key, fixed_label_value, extra)
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parents: 11515
diff changeset
192 end
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parents: 11515
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193
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194 if stats.cork then
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parents: 11515
diff changeset
195 function cork()
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196 return stats:cork()
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parents: 11515
diff changeset
197 end
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parents: 11515
diff changeset
198
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199 function uncork()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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200 return stats:uncork()
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parents: 11515
diff changeset
201 end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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parents: 11515
diff changeset
202 else
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parents: 11515
diff changeset
203 function cork() end
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 11515
diff changeset
204 function uncork() end
6554
6c22bec3e8d0 statsmanager, prosody: New core module and API for gathering statistics about the running server
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
205 end
7533
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
206
11515
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
207 if stats_interval or stats_interval_config == "manual" then
7533
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parents: 7524
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208
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
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parents: 7524
diff changeset
209 local mark_collection_start = measure("times", "stats.collection");
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
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parents: 7524
diff changeset
210 local mark_processing_start = measure("times", "stats.processing");
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Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
211
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
212 function collect()
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
213 local mark_collection_done = mark_collection_start();
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
214 fire_event("stats-update");
11523
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parents: 11515
diff changeset
215 -- ensure that the backend is uncorked, in case it got stuck at
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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parents: 11515
diff changeset
216 -- some point, to avoid infinite resource use
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 11515
diff changeset
217 uncork()
7533
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
218 mark_collection_done();
11523
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diff changeset
219 local manual_result = nil
7533
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
220
11523
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diff changeset
221 if stats.metric_registry then
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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parents: 11515
diff changeset
222 -- only if supported by the backend, we fire the event which
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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parents: 11515
diff changeset
223 -- provides the current metric values
11506
9a3ebdd65f9c core.statsmanager: Cover util.statistics work in processing measurement
Kim Alvefur <zash@zash.se>
parents: 10884
diff changeset
224 local mark_processing_done = mark_processing_start();
11523
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
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diff changeset
225 local metric_registry = stats.metric_registry;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
Jonas Schäfer <jonas@wielicki.name>
parents: 11515
diff changeset
226 fire_event("openmetrics-updated", { metric_registry = metric_registry })
7533
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
227 mark_processing_done();
11523
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parents: 11515
diff changeset
228 manual_result = metric_registry;
7533
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
229 end
11523
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Jonas Schäfer <jonas@wielicki.name>
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diff changeset
230
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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parents: 11515
diff changeset
231 return stats_interval, manual_result;
7533
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
232 end
11515
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
233 if stats_interval then
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
234 log("debug", "Statistics enabled using %s provider, collecting every %d seconds", stats_provider_name, stats_interval);
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
235 timer.add_task(stats_interval, collect);
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
236 prosody.events.add_handler("server-started", function () collect() end, -1);
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
237 prosody.events.add_handler("server-stopped", function () collect() end, -1);
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
238 else
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
239 log("debug", "Statistics enabled using %s provider, no scheduled collection", stats_provider_name);
10d13e0554f9 core.statsmanager: Allow special "manual" value for statistics_interval
Kim Alvefur <zash@zash.se>
parents: 11506
diff changeset
240 end
7533
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
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parents: 7524
diff changeset
241 else
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
242 log("debug", "Statistics enabled using %s provider, collection is disabled", stats_provider_name);
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
243 end
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
244 else
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
245 log("debug", "Statistics disabled");
4ef37ac69562 statsmanager: Refactor to simplify logic. Notably renames 'statistics_provider' to 'statistics', and external libs now just begin with ':'
Matthew Wild <mwild1@gmail.com>
parents: 7524
diff changeset
246 function measure() return measure; end
11523
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247
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248 local dummy_mt = {}
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249 function dummy_mt.__newindex()
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250 end
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251 function dummy_mt:__index()
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252 return self
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253 end
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254 function dummy_mt:__call()
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255 return self
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256 end
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257 local dummy = {}
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258 setmetatable(dummy, dummy_mt)
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259
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260 function metric() return dummy; end
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261 function cork() end
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262 function uncork() end
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263 end
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264
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265 local exported_collect = nil;
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266 if stats_interval_config == "manual" then
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267 exported_collect = collect;
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268 end
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269
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270 return {
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271 collect = exported_collect;
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272 measure = measure;
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273 cork = cork;
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274 uncork = uncork;
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275 metric = metric;
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276 get_metric_registry = function ()
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277 return stats and stats.metric_registry or nil
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278 end;
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279 };