prosody
26327eac56dc
core/statsmanager.lua

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core/statsmanager.lua @ 13238:26327eac56dc

util.datamanager: Always reset index after list shift Shifting the index does not work reliably yet, better to rebuild it from scratch. Since there is minimal parsing involved in that, it should be more efficient anyway.
author Kim Alvefur <zash@zash.se>
date Sat, 22 Jul 2023 14:02:01 +0200
parent 12972:ead41e25ebc0
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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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27
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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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32
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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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121 m:set(0)
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diff changeset
122 return function(v)
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123 m:add(v)
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124 end
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125 end;
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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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129 -- previous versions of the API allowed passing an initial
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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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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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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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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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188 -- interface.
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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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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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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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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diff changeset
195 function cork()
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196 return stats:cork()
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diff changeset
197 end
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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()
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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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");
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
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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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
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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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
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diff changeset
225 local metric_registry = stats.metric_registry;
5f15ab7c6ae5 Statistics: Rewrite statistics backends to use OpenMetrics
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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 ':'
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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 ':'
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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
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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 };