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mod_pinger/mod_pinger.lua @ 4877:adc6241e5d16
mod_measure_process: Report the enforced limit
The soft limit is what the kernel actually enforces, while the hard
limit is is how far you can change the soft limit without privileges.
Unless the process dynamically adjusts the soft limit, knowing the hard
limit is not as useful as knowing the soft limit.
Reporting the soft limit and the number of in-use FDs allows placing
alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 18 Jan 2022 18:55:20 +0100 |
parent | 3113:8298b06e6603 |
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local new_watchdog = require "util.watchdog".new; local filters = require "util.filters"; local st = require "util.stanza"; local idle_timeout = module:get_option_number("c2s_idle_timeout", 300); local ping_timeout = module:get_option_number("c2s_ping_timeout", 30); function update_watchdog(data, session) if session.idle_watchdog then session.idle_watchdog:reset(); session.idle_pinged = nil; end return data; end function check_session(watchdog) local session = watchdog.session; if session.smacks then unwatch_session(session); return; end if not session.idle_pinged then session.idle_pinged = true; session.send(st.iq({ type = "get", from = module.host, id = "idle-check" }) :tag("ping", { xmlns = "urn:xmpp:ping" })); return ping_timeout; -- Call us again after ping_timeout else module:log("info", "Client %q silent for too long, closing...", session.full_jid); session:close("connection-timeout"); end end function watch_session(session) if not session.idle_watchdog and not session.requests then -- Don't watch BOSH connections (BOSH already has timeouts) session.idle_watchdog = new_watchdog(idle_timeout, check_session); session.idle_watchdog.session = session; filters.add_filter(session, "bytes/in", update_watchdog); end end function unwatch_session(session) if session.idle_watchdog then filters.remove_filter(session, "bytes/in", update_watchdog); session.idle_watchdog:cancel(); session.idle_watchdog = nil; end end module:hook("resource-bind", function (event) watch_session(event.session); end); module:hook("resource-unbind", function (event) unwatch_session(event.session); end);