view mod_measure_process/mod_measure_process.lua @ 5553:67152838afbc

mod_http_oauth2: Improve error messages for URI properties Since there are separate validation checks for URI properties, including that they should use https, with better and more specific error reporting. Reverts 'luaPattern' to 'pattern' which is not currently supported by util.jsonschema, but allows anything that retrieves the schema over http to validate against it, should they wish to do so.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Jun 2023 18:15:00 +0200
parents c26f515751af
children
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module:set_global()

local get_cpu_time = os.clock

local custom_metric = require "core.statsmanager".metric
local cpu_time = custom_metric(
	"counter", "process_cpu", "seconds",
	"CPU time used by Prosody as reported by clock(3)."
):with_labels()

local lfs = require "lfs"

module:hook("stats-update", function ()
	cpu_time:set(get_cpu_time())
end);

if lfs.attributes("/proc/self/statm", "mode") == "file" then
	local pagesize = module:get_option_number("memory_pagesize", 4096); -- getconf PAGESIZE

	local vsz = custom_metric(
		"gauge", "process_virtual_memory", "bytes",
		"Virtual memory size in bytes."
	):with_labels()
	local rss = custom_metric(
		"gauge", "process_resident_memory", "bytes",
		"Resident memory size in bytes."
	):with_labels()

	module:hook("stats-update", function ()
		local statm, err = io.open("/proc/self/statm");
		if not statm then
			module:log("error", tostring(err));
			return;
		end
		-- virtual memory (caches, opened librarys, everything)
		vsz:set(statm:read("*n") * pagesize);
		-- resident set size (actually used memory)
		rss:set(statm:read("*n") * pagesize);
		statm:close();
	end);
end

if lfs.attributes("/proc/self/fd", "mode") == "directory" then
	local open_fds = custom_metric(
		"gauge", "process_open_fds", "",
		"Number of open file descriptors."
	):with_labels()

	local has_posix, posix = pcall(require, "util.pposix")
	local max_fds
	if has_posix then
		max_fds = custom_metric(
			"gauge", "process_max_fds", "",
			"Maximum number of open file descriptors"
		):with_labels()
	else
		module:log("warn", "not reporting maximum number of file descriptors because mod_posix is not available")
	end

	local function limit2num(limit)
		if limit == "unlimited" then
			return math.huge
		end
		return limit
	end

	module:hook("stats-update", function ()
		local count = 0
		for _ in lfs.dir("/proc/self/fd") do
			count = count + 1
		end
		open_fds:set(count)

		if has_posix then
			local ok, soft, hard = posix.getrlimit("NOFILE")
			if ok then
				max_fds:set(limit2num(soft or hard));
			end
		end
	end);
end