Mercurial > prosody-modules
diff mod_measure_modules/mod_measure_modules.lua @ 5668:ecfd7aece33b
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 | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_measure_modules/mod_measure_modules.lua Fri Oct 06 18:34:39 2023 +0200 @@ -0,0 +1,33 @@ +module:set_global(); + +local mm = require "core.modulemanager"; +local sm = require "core.statsmanager"; + +local measure_status = sm.metric("gauge", "prosody_module_status", "", "Prosody module status", { "host"; "module" }); + +local status_priorities = { error = 3; warn = 2; info = 1; core = 0 }; + +function module.add_host(module) + local measure = measure_status:with_partial_label(module.host); + + if module.global then + measure = measure_status:with_partial_label(":global"); + end + + -- Already loaded modules + local modules = mm.get_modules(module.host); + for name, mod in pairs(modules) do + measure:with_labels(name):set(status_priorities[mod.module.status_type] or 0); + end + + -- TODO hook module load and unload + + -- Future changes + module:hook("module-status/updated", function(event) + local mod = mm.get_module(event.name); + measure:with_labels(event.name):set(status_priorities[mod and mod.module.status_type] or 0); + end); + +end + +module:add_host(); -- Initialize global context