annotate mod_statistics/mod_statistics.lua @ 1624:0f20390f6fa5

mod_munin: Implementation of the Munin collection protocol
author Kim Alvefur <zash@zash.se>
date Tue, 10 Mar 2015 16:39:08 +0100
parents 4713f9d453ec
children d7c014f91189
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1 module:set_global();
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2
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3 local stats = module:require("mod_statistics/stats");
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4 local filters = require "util.filters";
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5 local serialize = require "util.serialization".serialize;
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6
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7 local cached_values = {};
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8
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9 local sessions = {};
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10
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11 local function push_stat(conn, name, value)
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12 local value_str = serialize(value);
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13 return conn:write((("STAT %q (%s)\n"):format(name, value_str):gsub("\\\n", "\\n")));
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14 end
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15
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16 local function push_stat_to_all(name, value)
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17 for conn in pairs(sessions) do
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18 push_stat(conn, name, value);
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19 end
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20 end
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21
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22 local session_stats_tpl = ([[{
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23 message_in = %d, message_out = %d;
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24 presence_in = %d, presence_out = %d;
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25 iq_in = %d, iq_out = %d;
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26 bytes_in = %d, bytes_out = %d;
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27 }]]):gsub("%s", "");
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29
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30 local jid_fields = {
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31 c2s = "full_jid";
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32 s2sin = "from_host";
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33 s2sout = "to_host";
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34 component = "host";
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35 };
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36
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37 local function push_session_to_all(session, stats)
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38 local id = tostring(session):match("[a-f0-9]+$"); -- FIXME: Better id? :/
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39 local stanzas_in, stanzas_out = stats.stanzas_in, stats.stanzas_out;
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40 local s = (session_stats_tpl):format(
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41 stanzas_in.message, stanzas_out.message,
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42 stanzas_in.presence, stanzas_out.presence,
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43 stanzas_in.iq, stanzas_out.iq,
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44 stats.bytes_in, stats.bytes_out);
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45 local jid = session[jid_fields[session.type]] or "";
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46 for conn in pairs(sessions) do
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47 conn:write(("SESS %q %q %s\n"):format(id, jid, s));
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48 end
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49 end
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50
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51 local available_stats = stats.stats;
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52 local active_sessions = stats.active_sessions;
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53
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54 -- Handle statistics provided by other modules
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55 local function item_handlers(host)
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56 host = host and (host.."/") or "";
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57
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58 return function (event) -- Added
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59 local stats = event.item.statistics;
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60 local group = host..(stats.name and (stats.name.."::") or "");
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61 for name, stat in pairs(stats) do
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62 available_stats[group..name] = stat;
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63 end
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64 end, function (event) -- Removed
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65 local stats = event.item.statistics;
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66 local group = host..(stats.name and (stats.name.."::") or "");
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67 for name, stat in pairs(stats) do
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68 available_stats[group..name] = nil;
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69 end
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70 end;
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71 end
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72
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73 module:handle_items("statistics-provider", item_handlers());
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74 function module.add_host(module)
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75 module:handle_items("statistics-provider", item_handlers(module.host));
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76 end
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77
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78 -- Network listener
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79 local listener = {};
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80
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81 function listener.onconnect(conn)
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82 sessions[conn] = {};
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83 push_stat(conn, "version", prosody.version);
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84 for name, value in pairs(cached_values) do
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85 push_stat(conn, name, value);
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86 end
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87 conn:write("\n"); -- Signal end of first batch (for non-streaming clients)
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88 end
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89
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90 function listener.onincoming(conn, data)
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91 end
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92
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93 function listener.ondisconnect(conn)
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94 sessions[conn] = nil;
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95 end
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96
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97 function module.load()
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98 if not(prosody and prosody.arg) then
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99 return;
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100 end
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101 filters.add_filter_hook(stats.filter_hook);
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102
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103 module:add_timer(1, function ()
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104 for stat_name, stat in pairs(available_stats) do
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105 if stat.get then
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106 local cached = cached_values[stat_name];
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107 local new_value = stat.get();
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108 if new_value ~= cached then
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109 push_stat_to_all(stat_name, new_value);
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110 cached_values[stat_name] = new_value;
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111 end
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112 end
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113 end
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114 for session, session_stats in pairs(active_sessions) do
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115 active_sessions[session] = nil;
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116 push_session_to_all(session, session_stats);
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117 end
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118 return 1;
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119 end);
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120
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121 end
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122 function module.unload()
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123 filters.remove_filter_hook(stats.filter_hook);
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124 end
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125 function module.command( args )
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126 local command = args[1];
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127 if command == "top" then
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128 local dir = module:get_directory();
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129 package.path = dir.."/?.lua;"..dir.."/?.lib.lua;"..package.path;
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130 local prosodytop = require "prosodytop";
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131 prosodytop.run();
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132 end
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133 end
1074
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134
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135 if prosody and prosody.arg then
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136 module:provides("net", {
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137 default_port = 5782;
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138 listener = listener;
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139 private = true;
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140 });
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141 end