annotate mod_host_status_check/mod_host_status_check.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
parents 3d80f8dba886
children
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1 local time = require "socket".gettime;
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3 local heartbeats = module:shared("/*/host_status_check/heartbeats");
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4 local connection_events = module:shared("/*/host_status_check/connection_events");
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6 if prosody.hosts[module.host].type == "component" and module:get_option_string("component_module") == "component" then
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7 module:hook("component-authenticated", function ()
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8 connection_events[module.host] = { connected = true; timestamp = time() };
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9 end);
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11 -- Note: this event is not in 0.9, and requires a recent 0.10 or trunk build
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12 module:hook("component-disconnected", function ()
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13 connection_events[module.host] = { connected = false; timestamp = time() };
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14 end);
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16 module:hook("stanza/xmpp:prosody.im/heartbeat:heartbeat", function ()
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17 heartbeats[module.host] = time();
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18 return true;
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19 end);
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20 else
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21 connection_events[module.host] = { connected = true, timestamp = time() };
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22 end
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24 function module.unload()
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25 connection_events[module.host] = { connected = false, timestamp = time() };
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26 heartbeats[module.host] = nil;
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27 end