mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-20 07:26:08 +01:00
abe8e297a6
* Prefer device path based names over exported names For some sensors (like coretemp) it is possible that multiple instances exist, thus base the name on the device path and not on the exported name. * Update end-to-end test for dual socket machines Explicitly have 2 coretemp instances with a symlink for the device such that the hwmon collector must pick that name (or fail)
386 lines
12 KiB
Go
386 lines
12 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build !nohwmon
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package collector
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import (
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"errors"
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"io/ioutil"
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"os"
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"path"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"github.com/prometheus/client_golang/prometheus"
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)
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const (
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hwMonSubsystem = "hwmon"
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)
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var (
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hwmonInvalidMetricChars = regexp.MustCompile("[^a-z0-9:_]")
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hwmonFilenameFormat = regexp.MustCompile(`^(?P<type>[^0-9]+)(?P<id>[0-9]*)?(_(?P<property>.+))?$`)
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hwmonLabelDesc = []string{"chip", "sensor"}
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hwmonSensorTypes = []string{
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"vrm", "beep_enable", "update_interval", "in", "cpu", "fan",
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"pwm", "temp", "curr", "power", "energy", "humidity",
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"intrusion",
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}
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)
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func init() {
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Factories["hwmon"] = NewHwMonCollector
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}
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type hwMonCollector struct{}
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// Takes a prometheus registry and returns a new Collector exposing
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// /sys/class/hwmon stats (similar to lm-sensors).
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func NewHwMonCollector() (Collector, error) {
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return &hwMonCollector{}, nil
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}
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func cleanMetricName(name string) string {
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lower := strings.ToLower(name)
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replaced := hwmonInvalidMetricChars.ReplaceAllLiteralString(lower, "_")
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cleaned := strings.Trim(replaced, "_")
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return cleaned
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}
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func addValueFile(data map[string]map[string]string, sensor string, prop string, file string) {
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raw, e := ioutil.ReadFile(file)
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if e != nil {
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return
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}
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value := strings.Trim(string(raw), "\n")
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if _, ok := data[sensor]; !ok {
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data[sensor] = make(map[string]string)
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}
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data[sensor][prop] = value
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}
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// Split a sensor name into <type><num>_<property>
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func explodeSensorFilename(filename string) (ok bool, sensorType string, sensorNum int, sensorProperty string) {
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matches := hwmonFilenameFormat.FindStringSubmatch(filename)
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if len(matches) == 0 {
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return false, sensorType, sensorNum, sensorProperty
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}
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for i, match := range hwmonFilenameFormat.SubexpNames() {
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if i >= len(matches) {
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return true, sensorType, sensorNum, sensorProperty
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}
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if match == "type" {
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sensorType = matches[i]
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}
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if match == "property" {
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sensorProperty = matches[i]
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}
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if match == "id" && len(matches[i]) > 0 {
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if num, err := strconv.Atoi(matches[i]); err == nil {
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sensorNum = num
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} else {
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return false, sensorType, sensorNum, sensorProperty
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}
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}
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}
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return true, sensorType, sensorNum, sensorProperty
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}
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func collectSensorData(dir string, data map[string]map[string]string) (err error) {
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sensorFiles, dirError := ioutil.ReadDir(dir)
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if dirError != nil {
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return dirError
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}
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for _, file := range sensorFiles {
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filename := file.Name()
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ok, sensorType, sensorNum, sensorProperty := explodeSensorFilename(filename)
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if !ok {
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continue
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}
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for _, t := range hwmonSensorTypes {
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if t == sensorType {
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addValueFile(data, sensorType+strconv.Itoa(sensorNum), sensorProperty, path.Join(dir, file.Name()))
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break
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}
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}
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}
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return nil
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}
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func (c *hwMonCollector) updateHwmon(ch chan<- prometheus.Metric, dir string) (err error) {
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hwmonName, err := c.hwmonName(dir)
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if err != nil {
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return err
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}
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data := make(map[string]map[string]string)
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err = collectSensorData(dir, data)
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if err != nil {
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return err
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}
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if _, err := os.Stat(path.Join(dir, "device")); err == nil {
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err := collectSensorData(path.Join(dir, "device"), data)
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if err != nil {
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return err
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}
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}
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// format all sensors
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for sensor, sensorData := range data {
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_, sensorType, _, _ := explodeSensorFilename(sensor)
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if labelText, ok := sensorData["label"]; ok {
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label := cleanMetricName(labelText)
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if label != "" {
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sensor = label
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}
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}
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labels := []string{hwmonName, sensor}
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if sensorType == "beep_enable" {
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value := 0.0
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if sensorData[""] == "1" {
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value = 1.0
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}
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metricName := "node_hwmon_beep_enabled"
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desc := prometheus.NewDesc(metricName, "Hardware beep enabled", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, value, labels...)
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continue
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}
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if sensorType == "vrm" {
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parsedValue, err := strconv.ParseFloat(sensorData[""], 64)
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if err != nil {
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continue
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}
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metricName := "node_hwmon_voltage_regulator_version"
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desc := prometheus.NewDesc(metricName, "Hardware voltage regulator", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue, labels...)
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continue
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}
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if sensorType == "update_interval" {
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parsedValue, err := strconv.ParseFloat(sensorData[""], 64)
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if err != nil {
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continue
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}
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metricName := "node_hwmon_update_interval_seconds"
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desc := prometheus.NewDesc(metricName, "Hardware monitor update interval", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue*0.001, labels...)
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continue
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}
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prefix := "node_hwmon_" + sensorType
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for element, value := range sensorData {
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if element == "label" {
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continue
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}
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name := prefix
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if element == "input" {
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// input is actually the value
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if _, ok := sensorData[""]; ok {
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name = name + "_input"
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}
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} else if element != "" {
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name = name + "_" + cleanMetricName(element)
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}
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parsedValue, err := strconv.ParseFloat(value, 64)
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if err != nil {
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continue
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}
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// special elements, fault, alarm & beep should be handed out without units
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if element == "fault" || element == "alarm" {
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desc := prometheus.NewDesc(name, "Hardware sensor "+element+" status ("+sensorType+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, parsedValue, labels...)
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continue
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}
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if element == "beep" {
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desc := prometheus.NewDesc(name+"_enabled", "Hardware monitor sensor has beeping enabled", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, parsedValue, labels...)
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continue
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}
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// everything else should get a unit
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if sensorType == "in" || sensorType == "cpu" {
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desc := prometheus.NewDesc(name+"_volts", "Hardware monitor for voltage ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue*0.001, labels...)
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continue
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}
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if sensorType == "temp" && element != "type" {
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desc := prometheus.NewDesc(name+"_celsius", "Hardware monitor for temperature ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue*0.001, labels...)
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continue
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}
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if sensorType == "curr" {
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desc := prometheus.NewDesc(name+"_amps", "Hardware monitor for current ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue*0.001, labels...)
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continue
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}
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if sensorType == "energy" {
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desc := prometheus.NewDesc(name+"_joule_total", "Hardware monitor for joules used so far ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.CounterValue, parsedValue/1000000.0, labels...)
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continue
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}
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if sensorType == "power" && element == "accuracy" {
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desc := prometheus.NewDesc(name, "Hardware monitor power meter accuracy, as a ratio", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue/1000000.0, labels...)
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continue
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}
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if sensorType == "power" && (element == "average_interval" || element == "average_interval_min" || element == "average_interval_max") {
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desc := prometheus.NewDesc(name+"_seconds", "Hardware monitor power usage update interval ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue*0.001, labels...)
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continue
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}
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if sensorType == "power" {
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desc := prometheus.NewDesc(name+"_watt", "Hardware monitor for power usage in watts ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue/1000000.0, labels...)
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continue
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}
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if sensorType == "humidity" {
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desc := prometheus.NewDesc(name, "Hardware monitor for humidity, as a ratio (multiply with 100.0 to get the humidity as a percentage) ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue/1000000.0, labels...)
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continue
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}
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if sensorType == "fan" && (element == "input" || element == "min" || element == "max" || element == "target") {
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desc := prometheus.NewDesc(name+"_rpm", "Hardware monitor for fan revolutions per minute ("+element+")", hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue, labels...)
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continue
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}
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// fallback, just dump the metric as is
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desc := prometheus.NewDesc(name, "Hardware monitor "+sensorType+" element "+element, hwmonLabelDesc, nil)
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ch <- prometheus.MustNewConstMetric(
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desc, prometheus.GaugeValue, parsedValue, labels...)
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}
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}
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return nil
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}
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func (c *hwMonCollector) hwmonName(dir string) (string, error) {
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// generate a name for a sensor path
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// sensor numbering depends on the order of linux module loading and
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// is thus unstable.
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// However the path of the device has to be stable:
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// - /sys/devices/<bus>/<device>
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// Some hardware monitors have a "name" file that exports a human
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// readbale name that can be used.
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// human readable names would be bat0 or coretemp, while a path string
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// could be platform_applesmc.768
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// preference 1: construct a name based on device name, always unique
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devicePath, devErr := filepath.EvalSymlinks(path.Join(dir, "device"))
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if devErr == nil {
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devPathPrefix, devName := path.Split(devicePath)
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_, devType := path.Split(strings.TrimRight(devPathPrefix, "/"))
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cleanDevName := cleanMetricName(devName)
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cleanDevType := cleanMetricName(devType)
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if cleanDevType != "" && cleanDevName != "" {
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return cleanDevType + "_" + cleanDevName, nil
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}
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if cleanDevName != "" {
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return cleanDevName, nil
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}
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}
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// preference 2: is there a name file
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sysnameRaw, nameErr := ioutil.ReadFile(path.Join(dir, "name"))
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if nameErr == nil && string(sysnameRaw) != "" {
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cleanName := cleanMetricName(string(sysnameRaw))
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if cleanName != "" {
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return cleanName, nil
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}
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}
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// it looks bad, name and device don't provide enough information
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// return a hwmon[0-9]* name
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realDir, err := filepath.EvalSymlinks(dir)
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if err != nil {
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return "", err
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}
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// take the last path element, this will be hwmonX
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_, name := path.Split(realDir)
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cleanName := cleanMetricName(name)
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if cleanName != "" {
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return cleanName, nil
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}
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return "", errors.New("Could not derive a monitoring name for " + dir)
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}
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func (c *hwMonCollector) Update(ch chan<- prometheus.Metric) (err error) {
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// Step 1: scan /sys/class/hwmon, resolve all symlinks and call
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// updatesHwmon for each folder
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hwmonPathName := path.Join(sysFilePath("class"), "hwmon")
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hwmonFiles, err := ioutil.ReadDir(hwmonPathName)
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if err != nil {
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return err
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}
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for _, hwDir := range hwmonFiles {
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hwmonXPathName := path.Join(hwmonPathName, hwDir.Name())
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if hwDir.Mode()&os.ModeSymlink > 0 {
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hwDir, err = os.Stat(hwmonXPathName)
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if err != nil {
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continue
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}
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}
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if !hwDir.IsDir() {
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continue
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}
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if lastErr := c.updateHwmon(ch, hwmonXPathName); lastErr != nil {
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err = lastErr
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}
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}
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return err
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}
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