prosody-modules
025cf93acfe9
mod_measure_process/mod_measure_process.lua
Software / code / prosody-modules
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mod_measure_process/mod_measure_process.lua @ 4554:025cf93acfe9
mod_measure_process: Provide metrics about the process itself
| author | Jonas Schäfer <jonas@wielicki.name> |
|---|---|
| date | Wed, 28 Apr 2021 08:21:54 +0200 |
| child | 4877:adc6241e5d16 |
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| 4553:7e5c8186f121 | 4554:025cf93acfe9 |
|---|---|
| 1 module:set_global() | |
| 2 | |
| 3 local get_cpu_time = os.clock | |
| 4 | |
| 5 local custom_metric = require "core.statsmanager".metric | |
| 6 local cpu_time = custom_metric( | |
| 7 "counter", "process_cpu", "seconds", | |
| 8 "CPU time used by Prosody as reported by clock(3)." | |
| 9 ):with_labels() | |
| 10 | |
| 11 local lfs = require "lfs" | |
| 12 | |
| 13 module:hook("stats-update", function () | |
| 14 cpu_time:set(get_cpu_time()) | |
| 15 end); | |
| 16 | |
| 17 if lfs.attributes("/proc/self/statm", "mode") == "file" then | |
| 18 local pagesize = module:get_option_number("memory_pagesize", 4096); -- getconf PAGESIZE | |
| 19 | |
| 20 local vsz = custom_metric( | |
| 21 "gauge", "process_virtual_memory", "bytes", | |
| 22 "Virtual memory size in bytes." | |
| 23 ):with_labels() | |
| 24 local rss = custom_metric( | |
| 25 "gauge", "process_resident_memory", "bytes", | |
| 26 "Resident memory size in bytes." | |
| 27 ):with_labels() | |
| 28 | |
| 29 module:hook("stats-update", function () | |
| 30 local statm, err = io.open("/proc/self/statm"); | |
| 31 if not statm then | |
| 32 module:log("error", tostring(err)); | |
| 33 return; | |
| 34 end | |
| 35 -- virtual memory (caches, opened librarys, everything) | |
| 36 vsz:set(statm:read("*n") * pagesize); | |
| 37 -- resident set size (actually used memory) | |
| 38 rss:set(statm:read("*n") * pagesize); | |
| 39 statm:close(); | |
| 40 end); | |
| 41 end | |
| 42 | |
| 43 if lfs.attributes("/proc/self/fd", "mode") == "directory" then | |
| 44 local open_fds = custom_metric( | |
| 45 "gauge", "process_open_fds", "", | |
| 46 "Number of open file descriptors." | |
| 47 ):with_labels() | |
| 48 | |
| 49 local has_posix, posix = pcall(require, "util.pposix") | |
| 50 local max_fds | |
| 51 if has_posix then | |
| 52 max_fds = custom_metric( | |
| 53 "gauge", "process_max_fds", "", | |
| 54 "Maximum number of open file descriptors" | |
| 55 ):with_labels() | |
| 56 else | |
| 57 module:log("warn", "not reporting maximum number of file descriptors because mod_posix is not available") | |
| 58 end | |
| 59 | |
| 60 module:hook("stats-update", function () | |
| 61 local count = 0 | |
| 62 for _ in lfs.dir("/proc/self/fd") do | |
| 63 count = count + 1 | |
| 64 end | |
| 65 open_fds:set(count) | |
| 66 | |
| 67 if has_posix then | |
| 68 local ok, soft, hard = posix.getrlimit("NOFILE") | |
| 69 if ok then | |
| 70 max_fds:set(hard) | |
| 71 end | |
| 72 end | |
| 73 end); | |
| 74 end |
