view mod_measure_process/mod_measure_process.lua @ 5255:001c8fdc91a4

mod_http_oauth2: Add support for the "openid" scope This "openid" scope is there to signal access to the userinfo endpoint, which is needed for OIDC support. We don't actually check this later because the userinfo endpoint only returns info embedded in the token itself, but in the future we may want to check this more carefully.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 17:06:35 +0100
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