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annotate mod_measure_client_features/mod_measure_client_features.lua @ 5668:ecfd7aece33b

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mod_measure_modules: Report module statuses via OpenMetrics Someone in the chat asked about a health check endpoint, which reminded me of mod_http_status, which provides access to module statuses with full details. After that, this idea came about, which seems natural. As noted in the README, it could be used to monitor that critical modules are in fact loaded correctly. As more modules use the status API, the more useful this module and mod_http_status becomes.
author Kim Alvefur <zash@zash.se>
date Fri, 06 Oct 2023 18:34:39 +0200
parents 5fdbf416bd40
children 3e0bce07f66c
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5fdbf416bd40 mod_measure_client_features: Add a module to count the features of each connected client
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1 module:set_global();
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2
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3 local measure = require"core.statsmanager".measure;
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4
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5 local disco_ns = "http://jabber.org/protocol/disco#info";
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6
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7 local counters = {
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8 total = measure("amount", "client_features.total");
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9 };
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10
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11 module:hook("stats-update", function ()
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12 local total = 0;
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13 local buckets = {};
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14 for _, session in pairs(prosody.full_sessions) do
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15 local disco_info = session.caps_cache;
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16 if disco_info ~= nil then
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17 for feature in disco_info:childtags("feature", disco_ns) do
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18 local var = feature.attr.var;
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19 if var ~= nil then
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20 if buckets[var] == nil then
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21 buckets[var] = 0;
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22 end
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23 buckets[var] = buckets[var] + 1;
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24 end
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25 end
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26 total = total + 1;
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27 end
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28 end
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29 for bucket, count in pairs(buckets) do
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30 if counters[bucket] == nil then
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31 counters[bucket] = measure("amount", "client_features."..bucket);
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32 end
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33 counters[bucket](count);
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34 end
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35 counters.total(total);
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36 end)