From d27d9e566afba6418cd5233bdc469ec9dcb56b54 Mon Sep 17 00:00:00 2001 From: Christian Simon Date: Sat, 6 May 2017 18:18:10 +0100 Subject: [PATCH] prometheus-node-exporter-lua: adds node metrics exporter Signed-off-by: Christian Simon --- utils/prometheus-node-exporter-lua/Makefile | 45 ++ .../etc/config/prometheus-node-exporter-lua | 3 + .../etc/init.d/prometheus-node-exporter-lua | 19 + .../usr/bin/prometheus-node-exporter-lua | 391 ++++++++++++++++++ 4 files changed, 458 insertions(+) create mode 100644 utils/prometheus-node-exporter-lua/Makefile create mode 100644 utils/prometheus-node-exporter-lua/files/etc/config/prometheus-node-exporter-lua create mode 100644 utils/prometheus-node-exporter-lua/files/etc/init.d/prometheus-node-exporter-lua create mode 100755 utils/prometheus-node-exporter-lua/files/usr/bin/prometheus-node-exporter-lua diff --git a/utils/prometheus-node-exporter-lua/Makefile b/utils/prometheus-node-exporter-lua/Makefile new file mode 100644 index 0000000000..6662eb0604 --- /dev/null +++ b/utils/prometheus-node-exporter-lua/Makefile @@ -0,0 +1,45 @@ +# +# Copyright (C) 2013-2017 OpenWrt.org +# +include $(TOPDIR)/rules.mk + +PKG_NAME:=prometheus-node-exporter-lua +PKG_VERSION:=2017.05.07 +PKG_RELEASE:=1 + +PKG_MAINTAINER:=Christian Simon +PKG_LICENSE:=Apache-2.0 + +include $(INCLUDE_DIR)/package.mk + +define Package/prometheus-node-exporter-lua + SECTION:=utils + CATEGORY:=Utilities + TITLE:=Provides system statistics as Prometheus scraping endpoint + DEPENDS:=+luasocket + URL:=https://github.com/rbo/openwrt_exporter + PKGARCH:=all +endef + +define Package/prometheus-node-exporter-lua/conffiles +/etc/config/prometheus-node-exporter-lua +endef + +define Package/prometheus-node-exporter-lua/description + Provides node metrics as Prometheus scraping endpoint. + + This service is a lightweight rewrite in LUA of the offical Prometheus node_exporter. +endef + +Build/Compile= + +define Package/prometheus-node-exporter-lua/install + $(INSTALL_DIR) $(1)/etc/config + $(INSTALL_CONF) ./files/etc/config/prometheus-node-exporter-lua $(1)/etc/config/prometheus-node-exporter-lua + $(INSTALL_DIR) $(1)/etc/init.d + $(INSTALL_BIN) ./files/etc/init.d/prometheus-node-exporter-lua $(1)/etc/init.d/prometheus-node-exporter-lua + $(INSTALL_DIR) $(1)/usr/bin + $(INSTALL_BIN) ./files/usr/bin/prometheus-node-exporter-lua $(1)/usr/bin/prometheus-node-exporter-lua +endef + +$(eval $(call BuildPackage,prometheus-node-exporter-lua)) diff --git a/utils/prometheus-node-exporter-lua/files/etc/config/prometheus-node-exporter-lua b/utils/prometheus-node-exporter-lua/files/etc/config/prometheus-node-exporter-lua new file mode 100644 index 0000000000..1401a1aeca --- /dev/null +++ b/utils/prometheus-node-exporter-lua/files/etc/config/prometheus-node-exporter-lua @@ -0,0 +1,3 @@ +config prometheus-node-exporter-lua 'main' + option listen_address '::1' + option listen_port '9100' diff --git a/utils/prometheus-node-exporter-lua/files/etc/init.d/prometheus-node-exporter-lua b/utils/prometheus-node-exporter-lua/files/etc/init.d/prometheus-node-exporter-lua new file mode 100644 index 0000000000..fc8a0b2e66 --- /dev/null +++ b/utils/prometheus-node-exporter-lua/files/etc/init.d/prometheus-node-exporter-lua @@ -0,0 +1,19 @@ +#!/bin/sh /etc/rc.common +# Copyright (C) 2013-2017 OpenWrt.org + +START=60 +USE_PROCD=1 + +start_service() { + procd_open_instance + + config_load prometheus-node-exporter-lua.main + config_get bind "main" listen_address ::1 + config_get port "main" listen_port 9100 + + procd_set_param command /usr/bin/prometheus-node-exporter-lua + procd_append_param command --port ${port} + procd_append_param command --bind ${bind} + + procd_close_instance +} diff --git a/utils/prometheus-node-exporter-lua/files/usr/bin/prometheus-node-exporter-lua b/utils/prometheus-node-exporter-lua/files/usr/bin/prometheus-node-exporter-lua new file mode 100755 index 0000000000..fea846926b --- /dev/null +++ b/utils/prometheus-node-exporter-lua/files/usr/bin/prometheus-node-exporter-lua @@ -0,0 +1,391 @@ +#!/usr/bin/lua + +-- Metrics web server + +-- Copyright (c) 2016 Jeff Schornick +-- Copyright (c) 2015 Kevin Lyda +-- Licensed under the Apache License, Version 2.0 + +socket = require("socket") + +-- Allow us to call unpack under both lua5.1 and lua5.2+ +local unpack = unpack or table.unpack + +-- This table defines the scrapers to run. +-- Each corresponds directly to a scraper_ function. +scrapers = { "cpu", "load_averages", "memory", "file_handles", "network", + "network_devices", "time", "uname", "nat", "wifi"} + +-- Parsing + +function space_split(s) + elements = {} + for element in s:gmatch("%S+") do + table.insert(elements, element) + end + return elements +end + +function line_split(s) + elements = {} + for element in s:gmatch("[^\n]+") do + table.insert(elements, element) + end + return elements +end + +function get_contents(filename) + local f = io.open(filename, "rb") + local contents = "" + if f then + contents = f:read "*a" + f:close() + end + + return contents +end + +-- Metric printing + +function print_metric(metric, labels, value) + local label_string = "" + if labels then + for label,value in pairs(labels) do + label_string = label_string .. label .. '="' .. value .. '",' + end + label_string = "{" .. string.sub(label_string, 1, -2) .. "}" + end + output(string.format("%s%s %s", metric, label_string, value)) +end + +function metric(name, mtype, labels, value) + output("# TYPE " .. name .. " " .. mtype) + local outputter = function(labels, value) + print_metric(name, labels, value) + end + if value then + outputter(labels, value) + end + return outputter +end + +function scraper_wifi() + local rv = { } + local ntm = require "luci.model.network".init() + + local metric_wifi_network_up = metric("wifi_network_up","gauge") + local metric_wifi_network_quality = metric("wifi_network_quality","gauge") + local metric_wifi_network_bitrate = metric("wifi_network_bitrate","gauge") + local metric_wifi_network_noise = metric("wifi_network_noise","gauge") + local metric_wifi_network_signal = metric("wifi_network_signal","gauge") + + local metric_wifi_station_signal = metric("wifi_station_signal","gauge") + local metric_wifi_station_tx_packets = metric("wifi_station_tx_packets","gauge") + local metric_wifi_station_rx_packets = metric("wifi_station_rx_packets","gauge") + + local dev + for _, dev in ipairs(ntm:get_wifidevs()) do + local rd = { + up = dev:is_up(), + device = dev:name(), + name = dev:get_i18n(), + networks = { } + } + + local net + for _, net in ipairs(dev:get_wifinets()) do + local labels = { + channel = net:channel(), + ssid = net:active_ssid(), + bssid = net:active_bssid(), + mode = net:active_mode(), + ifname = net:ifname(), + country = net:country(), + frequency = net:frequency(), + } + if net:is_up() then + metric_wifi_network_up(labels, 1) + local signal = net:signal_percent() + if signal ~= 0 then + metric_wifi_network_quality(labels, net:signal_percent()) + end + metric_wifi_network_noise(labels, net:noise()) + local bitrate = net:bitrate() + if bitrate then + metric_wifi_network_bitrate(labels, bitrate) + end + + local assoclist = net:assoclist() + for mac, station in pairs(assoclist) do + local labels = { + ifname = net:ifname(), + mac = mac, + } + metric_wifi_station_signal(labels, station.signal) + metric_wifi_station_tx_packets(labels, station.tx_packets) + metric_wifi_station_rx_packets(labels, station.rx_packets) + end + else + metric_wifi_network_up(labels, 0) + end + end + rv[#rv+1] = rd + end +end + +function scraper_cpu() + local stat = get_contents("/proc/stat") + + -- system boot time, seconds since epoch + metric("node_boot_time", "gauge", nil, string.match(stat, "btime ([0-9]+)")) + + -- context switches since boot (all CPUs) + metric("node_context_switches", "counter", nil, string.match(stat, "ctxt ([0-9]+)")) + + -- cpu times, per CPU, per mode + local cpu_mode = {"user", "nice", "system", "idle", "iowait", "irq", + "softirq", "steal", "guest", "guest_nice"} + local i = 0 + local cpu_metric = metric("node_cpu", "counter") + while string.match(stat, string.format("cpu%d ", i)) do + local cpu = space_split(string.match(stat, string.format("cpu%d ([0-9 ]+)", i))) + local labels = {cpu = "cpu" .. i} + for ii, mode in ipairs(cpu_mode) do + labels['mode'] = mode + cpu_metric(labels, cpu[ii] / 100) + end + i = i + 1 + end + + -- interrupts served + metric("node_intr", "counter", nil, string.match(stat, "intr ([0-9]+)")) + + -- processes forked + metric("node_forks", "counter", nil, string.match(stat, "processes ([0-9]+)")) + + -- processes running + metric("node_procs_running", "gauge", nil, string.match(stat, "procs_running ([0-9]+)")) + + -- processes blocked for I/O + metric("node_procs_blocked", "gauge", nil, string.match(stat, "procs_blocked ([0-9]+)")) +end + +function scraper_load_averages() + local loadavg = space_split(get_contents("/proc/loadavg")) + + metric("node_load1", "gauge", nil, loadavg[1]) + metric("node_load5", "gauge", nil, loadavg[2]) + metric("node_load15", "gauge", nil, loadavg[3]) +end + +function scraper_memory() + local meminfo = line_split(get_contents("/proc/meminfo"):gsub("[):]", ""):gsub("[(]", "_")) + + for i, mi in ipairs(meminfo) do + local name, size, unit = unpack(space_split(mi)) + if unit == 'kB' then + size = size * 1024 + end + metric("node_memory_" .. name, "gauge", nil, size) + end +end + +function scraper_file_handles() + local file_nr = space_split(get_contents("/proc/sys/fs/file-nr")) + + metric("node_filefd_allocated", "gauge", nil, file_nr[1]) + metric("node_filefd_maximum", "gauge", nil, file_nr[3]) +end + +function scraper_network() + -- NOTE: Both of these are missing in OpenWRT kernels. + -- See: https://dev.openwrt.org/ticket/15781 + local netstat = get_contents("/proc/net/netstat") .. get_contents("/proc/net/snmp") + + -- all devices + local netsubstat = {"IcmpMsg", "Icmp", "IpExt", "Ip", "TcpExt", "Tcp", "UdpLite", "Udp"} + for i, nss in ipairs(netsubstat) do + local substat_s = string.match(netstat, nss .. ": ([A-Z][A-Za-z0-9 ]+)") + if substat_s then + local substat = space_split(substat_s) + local substatv = space_split(string.match(netstat, nss .. ": ([0-9 -]+)")) + for ii, ss in ipairs(substat) do + metric("node_netstat_" .. nss .. "_" .. ss, "gauge", nil, substatv[ii]) + end + end + end +end + +function scraper_network_devices() + local netdevstat = line_split(get_contents("/proc/net/dev")) + local netdevsubstat = {"receive_bytes", "receive_packets", "receive_errs", + "receive_drop", "receive_fifo", "receive_frame", "receive_compressed", + "receive_multicast", "transmit_bytes", "transmit_packets", + "transmit_errs", "transmit_drop", "transmit_fifo", "transmit_colls", + "transmit_carrier", "transmit_compressed"} + for i, line in ipairs(netdevstat) do + netdevstat[i] = string.match(netdevstat[i], "%S.*") + end + local nds_table = {} + local devs = {} + for i, nds in ipairs(netdevstat) do + local dev, stat_s = string.match(netdevstat[i], "([^:]+): (.*)") + if dev then + nds_table[dev] = space_split(stat_s) + table.insert(devs, dev) + end + end + for i, ndss in ipairs(netdevsubstat) do + netdev_metric = metric("node_network_" .. ndss, "gauge") + for ii, d in ipairs(devs) do + netdev_metric({device=d}, nds_table[d][i]) + end + end +end + +function scraper_time() + -- current time + metric("node_time", "counter", nil, os.time()) +end + +function scraper_uname() + -- version can have spaces, so grab it directly + local version = string.sub(io.popen("uname -v"):read("*a"), 1, -2) + -- avoid individual popen calls for the rest of the values + local uname_string = io.popen("uname -a"):read("*a") + local sysname, nodename, release = unpack(space_split(uname_string)) + local labels = {domainname = "(none)", nodename = nodename, release = release, + sysname = sysname, version = version} + + -- The machine hardware name is immediately after the version string, so add + -- up the values we know and add in the 4 spaces to find the offset... + machine_offset = string.len(sysname .. nodename .. release .. version) + 4 + labels['machine'] = string.match(string.sub(uname_string, machine_offset), "(%S+)" ) + metric("node_uname_info", "gauge", labels, 1) +end + +function scraper_nat() + -- documetation about nf_conntrack: + -- https://www.frozentux.net/iptables-tutorial/chunkyhtml/x1309.html + -- local natstat = line_split(get_contents("/proc/net/nf_conntrack")) + local natstat = line_split(get_contents("nf_conntrack")) + + nat_metric = metric("node_nat_traffic", "gauge" ) + for i, e in ipairs(natstat) do + -- output(string.format("%s\n",e )) + local fields = space_split(e) + local src, dest, bytes; + bytes = 0; + for ii, field in ipairs(fields) do + if src == nil and string.match(field, '^src') then + src = string.match(field,"src=([^ ]+)"); + elseif dest == nil and string.match(field, '^dst') then + dest = string.match(field,"dst=([^ ]+)"); + elseif string.match(field, '^bytes') then + local b = string.match(field, "bytes=([^ ]+)"); + bytes = bytes + b; + -- output(string.format("\t%d %s",ii,field )); + end + + end + -- local src, dest, bytes = string.match(natstat[i], "src=([^ ]+) dst=([^ ]+) .- bytes=([^ ]+)"); + -- local src, dest, bytes = string.match(natstat[i], "src=([^ ]+) dst=([^ ]+) sport=[^ ]+ dport=[^ ]+ packets=[^ ]+ bytes=([^ ]+)") + + local labels = { src = src, dest = dest } + -- output(string.format("src=|%s| dest=|%s| bytes=|%s|", src, dest, bytes )) + nat_metric(labels, bytes ) + end +end + +function timed_scrape(scraper) + local start_time = socket.gettime() + -- build the function name and call it from global variable table + _G["scraper_"..scraper]() + local duration = socket.gettime() - start_time + return duration +end + +function run_all_scrapers() + times = {} + for i,scraper in ipairs(scrapers) do + runtime = timed_scrape(scraper) + times[scraper] = runtime + scrape_time_sums[scraper] = scrape_time_sums[scraper] + runtime + scrape_counts[scraper] = scrape_counts[scraper] + 1 + end + + local name = "node_exporter_scrape_duration_seconds" + local duration_metric = metric(name, "summary") + for i,scraper in ipairs(scrapers) do + local labels = {collector=scraper, result="success"} + duration_metric(labels, times[scraper]) + print_metric(name.."_sum", labels, scrape_time_sums[scraper]) + print_metric(name.."_count", labels, scrape_counts[scraper]) + end +end + +-- Web server-specific functions + +function http_ok_header() + output("HTTP/1.1 200 OK\r") + output("Server: lua-metrics\r") + output("Content-Type: text/plain; version=0.0.4\r") + output("\r") +end + +function http_not_found() + output("HTTP/1.1 404 Not Found\r") + output("Server: lua-metrics\r") + output("Content-Type: text/plain\r") + output("\r") + output("ERROR: File Not Found.") +end + +function serve(request) + if not string.match(request, "GET /metrics.*") then + http_not_found() + else + http_ok_header() + run_all_scrapers() + end + client:close() + return true +end + +-- Main program + +for k,v in ipairs(arg) do + if (v == "-p") or (v == "--port") then + port = arg[k+1] + end + if (v == "-b") or (v == "--bind") then + bind = arg[k+1] + end +end + +scrape_counts = {} +scrape_time_sums = {} +for i,scraper in ipairs(scrapers) do + scrape_counts[scraper] = 0 + scrape_time_sums[scraper] = 0 +end + +if port then + server = assert(socket.bind(bind, port)) + + while 1 do + client = server:accept() + client:settimeout(60) + local request, err = client:receive() + + if not err then + output = function (str) client:send(str.."\n") end + if not serve(request) then + break + end + end + end +else + output = print + run_all_scrapers() +end -- 2.30.2