prosody
3a1b1d3084fb
util/statsd.lua

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util/statsd.lua @ 10721:3a1b1d3084fb 0.11

core.certmanager: Move EECDH ciphers before EDH in default cipherstring (fixes #1513) Backport of 94e341dee51c The original intent of having kEDH before kEECDH was that if a `dhparam` file was specified, this would be interpreted as a preference by the admin for old and well-tested Diffie-Hellman key agreement over newer elliptic curve ones. Otherwise the faster elliptic curve ciphersuites would be preferred. This didn't really work as intended since this affects the ClientHello on outgoing s2s connections, leading to some servers using poorly configured kEDH. With Debian shipping OpenSSL settings that enforce a higher security level, this caused interoperability problems with servers that use DH params smaller than 2048 bits. E.g. jabber.org at the time of this writing has 1024 bit DH params. MattJ says > Curves have won, and OpenSSL is less weird about them now
author Kim Alvefur <zash@zash.se>
date Sun, 25 Aug 2019 20:22:35 +0200
parent 7988:dc758422d896
child 10924:0c072dd69603
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1 local socket = require "socket";
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2
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3 local time = require "util.time".now
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4
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5 local function new(config)
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6 if not config or not config.statsd_server then
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7 return nil, "No statsd server specified in the config, please see https://prosody.im/doc/statistics";
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8 end
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9
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10 local sock = socket.udp();
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11 sock:setpeername(config.statsd_server, config.statsd_port or 8125);
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12
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13 local prefix = (config.prefix or "prosody")..".";
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14
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15 local function send_metric(s)
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16 return sock:send(prefix..s);
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17 end
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19 local function send_gauge(name, amount, relative)
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20 local s_amount = tostring(amount);
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21 if relative and amount > 0 then
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22 s_amount = "+"..s_amount;
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23 end
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24 return send_metric(name..":"..s_amount.."|g");
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25 end
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27 local function send_counter(name, amount)
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28 return send_metric(name..":"..tostring(amount).."|c");
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29 end
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31 local function send_duration(name, duration)
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32 return send_metric(name..":"..tostring(duration).."|ms");
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33 end
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34
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35 local function send_histogram_sample(name, sample)
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36 return send_metric(name..":"..tostring(sample).."|h");
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37 end
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39 local methods;
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40 methods = {
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41 amount = function (name, initial)
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42 if initial then
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43 send_gauge(name, initial);
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44 end
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45 return function (new_v) send_gauge(name, new_v); end
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46 end;
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47 counter = function (name, initial) --luacheck: ignore 212/initial
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48 return function (delta)
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49 send_gauge(name, delta, true);
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50 end;
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51 end;
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52 rate = function (name)
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53 return function ()
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54 send_counter(name, 1);
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55 end;
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56 end;
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57 distribution = function (name, unit, type) --luacheck: ignore 212/unit 212/type
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58 return function (value)
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59 send_histogram_sample(name, value);
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60 end;
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61 end;
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62 sizes = function (name)
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63 name = name.."_size";
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64 return function (value)
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65 send_histogram_sample(name, value);
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66 end;
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67 end;
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68 times = function (name)
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69 return function ()
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70 local start_time = time();
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71 return function ()
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72 local end_time = time();
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73 local duration = end_time - start_time;
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74 send_duration(name, duration*1000);
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75 end
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76 end;
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77 end;
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78 };
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79 return methods;
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80 end
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81
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82 return {
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83 new = new;
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84 }