mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-09 23:24:09 -08:00
126 lines
3.3 KiB
Go
126 lines
3.3 KiB
Go
// Copyright 2019 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
//go:build !nocpu
|
|
// +build !nocpu
|
|
|
|
package collector
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/go-kit/log"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/procfs/sysfs"
|
|
"strings"
|
|
)
|
|
|
|
type cpuFreqCollector struct {
|
|
fs sysfs.FS
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("cpufreq", defaultEnabled, NewCPUFreqCollector)
|
|
}
|
|
|
|
// NewCPUFreqCollector returns a new Collector exposing kernel/system statistics.
|
|
func NewCPUFreqCollector(logger log.Logger) (Collector, error) {
|
|
fs, err := sysfs.NewFS(*sysPath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to open sysfs: %w", err)
|
|
}
|
|
|
|
return &cpuFreqCollector{
|
|
fs: fs,
|
|
logger: logger,
|
|
}, nil
|
|
}
|
|
|
|
// Update implements Collector and exposes cpu related metrics from /proc/stat and /sys/.../cpu/.
|
|
func (c *cpuFreqCollector) Update(ch chan<- prometheus.Metric) error {
|
|
cpuFreqs, err := c.fs.SystemCpufreq()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// sysfs cpufreq values are kHz, thus multiply by 1000 to export base units (hz).
|
|
// See https://www.kernel.org/doc/Documentation/cpu-freq/user-guide.txt
|
|
for _, stats := range cpuFreqs {
|
|
if stats.CpuinfoCurrentFrequency != nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqHertzDesc,
|
|
prometheus.GaugeValue,
|
|
float64(*stats.CpuinfoCurrentFrequency)*1000.0,
|
|
stats.Name,
|
|
)
|
|
}
|
|
if stats.CpuinfoMinimumFrequency != nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqMinDesc,
|
|
prometheus.GaugeValue,
|
|
float64(*stats.CpuinfoMinimumFrequency)*1000.0,
|
|
stats.Name,
|
|
)
|
|
}
|
|
if stats.CpuinfoMaximumFrequency != nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqMaxDesc,
|
|
prometheus.GaugeValue,
|
|
float64(*stats.CpuinfoMaximumFrequency)*1000.0,
|
|
stats.Name,
|
|
)
|
|
}
|
|
if stats.ScalingCurrentFrequency != nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqScalingFreqDesc,
|
|
prometheus.GaugeValue,
|
|
float64(*stats.ScalingCurrentFrequency)*1000.0,
|
|
stats.Name,
|
|
)
|
|
}
|
|
if stats.ScalingMinimumFrequency != nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqScalingFreqMinDesc,
|
|
prometheus.GaugeValue,
|
|
float64(*stats.ScalingMinimumFrequency)*1000.0,
|
|
stats.Name,
|
|
)
|
|
}
|
|
if stats.ScalingMaximumFrequency != nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqScalingFreqMaxDesc,
|
|
prometheus.GaugeValue,
|
|
float64(*stats.ScalingMaximumFrequency)*1000.0,
|
|
stats.Name,
|
|
)
|
|
}
|
|
if stats.Governor != "" {
|
|
availableGovernors := strings.Split(stats.AvailableGovernors, " ")
|
|
for _, g := range availableGovernors {
|
|
state := 0
|
|
if g == stats.Governor {
|
|
state = 1
|
|
}
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqScalingGovernorDesc,
|
|
prometheus.GaugeValue,
|
|
float64(state),
|
|
stats.Name,
|
|
g,
|
|
)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|