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annotate mod_measure_lua/mod_measure_lua.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 78f1515575ab
children
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4578
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
Jonas Schäfer <jonas@wielicki.name>
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1 module:set_global()
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2
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
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parents:
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3 local custom_metric = require "core.statsmanager".metric
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
Jonas Schäfer <jonas@wielicki.name>
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4 local gc_bytes = custom_metric(
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
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5 "gauge", "lua_heap", "bytes",
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
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6 "Memory used by objects under control of the Lua garbage collector"
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
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7 ):with_labels()
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8
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
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9 module:hook("stats-update", function ()
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
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10 local kbytes = collectgarbage("count");
d95fcde6e39d mod_measure_lua: add openmetrics-spirited way to collect lua memory use
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11 gc_bytes:set(kbytes * 1024);
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12 end);
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13
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78f1515575ab mod_measure_lua: Use gauge instead of counter for Lua version (thanks jonas’)
Kim Alvefur <zash@zash.se>
parents: 4601
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14 custom_metric("gauge", "lua_info", "", "Lua runtime version", { "version" }):with_labels(_VERSION):set(1);