File

mod_host_status_heartbeat/mod_host_status_heartbeat.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>
date Tue, 18 Jan 2022 18:55:20 +0100
parent 2220:7f955f92bbbb
line wrap: on
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local st = require "util.stanza";
local time = require "socket".gettime;

local heartbeat_interval = module:get_option_number("status_check_heartbeat_interval", 5);
local heartbeat_mode = module:get_option_string("status_check_heartbeat_mode", "remote");

local local_heartbeats = module:shared("/*/host_status_check/heartbeats");

local heartbeat_methods = {
	["local"] = function()
		module:log("debug", "Local heartbeat");
		local_heartbeats[module.host] = time();
		return heartbeat_interval;
	end;

	["remote"] = function ()
		module:fire_event("route/remote", {
			origin = prosody.hosts[module.host];
			stanza = st.stanza("heartbeat", { xmlns = "xmpp:prosody.im/heartbeat" });
		});
		return heartbeat_interval;
	end;		
}

local send_heartbeat = assert(heartbeat_methods[heartbeat_mode], "Unknown heartbeat_mode: "..heartbeat_mode);

module:add_timer(0, send_heartbeat);