prosody-modules
13070c6a7ce8
mod_measure_process/mod_measure_process.lua

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mod_measure_process/mod_measure_process.lua @ 4930:13070c6a7ce8

mod_http_muc_log: Fix exception on lack of trailing slash in room path A request to /room leads to the match call returning nil which in turn calls nodeprep(nil). In Prosody 0.11.x this does nothing and simply returns the nil, while in 0.12 it is an error. Now it redirects to the calendar view at /room/ - even for non-existant rooms. Discovered at a deployment with http_paths = { muc_log = "/" } and requests to /robots.txt and similar, which now result in a uses redirect before returning 404.
author Kim Alvefur <zash@zash.se>
date Fri, 22 Apr 2022 14:29:32 +0200
parent 4878:c26f515751af
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025cf93acfe9 mod_measure_process: Provide metrics about the process itself
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1 module:set_global()
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2
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3 local get_cpu_time = os.clock
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4
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5 local custom_metric = require "core.statsmanager".metric
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6 local cpu_time = custom_metric(
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7 "counter", "process_cpu", "seconds",
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8 "CPU time used by Prosody as reported by clock(3)."
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9 ):with_labels()
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10
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11 local lfs = require "lfs"
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12
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13 module:hook("stats-update", function ()
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14 cpu_time:set(get_cpu_time())
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15 end);
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16
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17 if lfs.attributes("/proc/self/statm", "mode") == "file" then
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18 local pagesize = module:get_option_number("memory_pagesize", 4096); -- getconf PAGESIZE
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19
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20 local vsz = custom_metric(
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21 "gauge", "process_virtual_memory", "bytes",
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22 "Virtual memory size in bytes."
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23 ):with_labels()
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24 local rss = custom_metric(
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25 "gauge", "process_resident_memory", "bytes",
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26 "Resident memory size in bytes."
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27 ):with_labels()
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28
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29 module:hook("stats-update", function ()
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30 local statm, err = io.open("/proc/self/statm");
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31 if not statm then
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32 module:log("error", tostring(err));
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33 return;
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34 end
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35 -- virtual memory (caches, opened librarys, everything)
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36 vsz:set(statm:read("*n") * pagesize);
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37 -- resident set size (actually used memory)
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38 rss:set(statm:read("*n") * pagesize);
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39 statm:close();
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40 end);
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41 end
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42
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43 if lfs.attributes("/proc/self/fd", "mode") == "directory" then
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44 local open_fds = custom_metric(
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45 "gauge", "process_open_fds", "",
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46 "Number of open file descriptors."
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47 ):with_labels()
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48
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49 local has_posix, posix = pcall(require, "util.pposix")
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50 local max_fds
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51 if has_posix then
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52 max_fds = custom_metric(
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53 "gauge", "process_max_fds", "",
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54 "Maximum number of open file descriptors"
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55 ):with_labels()
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56 else
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57 module:log("warn", "not reporting maximum number of file descriptors because mod_posix is not available")
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58 end
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59
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60 local function limit2num(limit)
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61 if limit == "unlimited" then
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62 return math.huge
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63 end
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64 return limit
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65 end
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66
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67 module:hook("stats-update", function ()
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68 local count = 0
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69 for _ in lfs.dir("/proc/self/fd") do
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70 count = count + 1
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71 end
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72 open_fds:set(count)
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73
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74 if has_posix then
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75 local ok, soft, hard = posix.getrlimit("NOFILE")
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76 if ok then
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77 max_fds:set(limit2num(soft or hard));
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78 end
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79 end
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80 end);
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81 end