mirror of
https://github.com/prometheus/node_exporter
synced 2024-12-11 17:06:04 +00:00
98 lines
2.5 KiB
Go
98 lines
2.5 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 !norapl
|
|
// +build !norapl
|
|
|
|
package collector
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
|
|
"github.com/go-kit/log"
|
|
"github.com/go-kit/log/level"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/procfs/sysfs"
|
|
)
|
|
|
|
type raplCollector struct {
|
|
fs sysfs.FS
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("rapl", defaultEnabled, NewRaplCollector)
|
|
}
|
|
|
|
// NewRaplCollector returns a new Collector exposing RAPL metrics.
|
|
func NewRaplCollector(logger log.Logger) (Collector, error) {
|
|
fs, err := sysfs.NewFS(*sysPath)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
collector := raplCollector{
|
|
fs: fs,
|
|
logger: logger,
|
|
}
|
|
return &collector, nil
|
|
}
|
|
|
|
// Update implements Collector and exposes RAPL related metrics.
|
|
func (c *raplCollector) Update(ch chan<- prometheus.Metric) error {
|
|
// nil zones are fine when platform doesn't have powercap files present.
|
|
zones, err := sysfs.GetRaplZones(c.fs)
|
|
if err != nil {
|
|
if errors.Is(err, os.ErrNotExist) {
|
|
level.Debug(c.logger).Log("msg", "Platform doesn't have powercap files present", "err", err)
|
|
return ErrNoData
|
|
}
|
|
if errors.Is(err, os.ErrPermission) {
|
|
level.Debug(c.logger).Log("msg", "Can't access powercap files", "err", err)
|
|
return ErrNoData
|
|
}
|
|
return fmt.Errorf("failed to retrieve rapl stats: %w", err)
|
|
}
|
|
|
|
for _, rz := range zones {
|
|
newMicrojoules, err := rz.GetEnergyMicrojoules()
|
|
if err != nil {
|
|
if errors.Is(err, os.ErrPermission) {
|
|
level.Debug(c.logger).Log("msg", "Can't access energy_uj file", "zone", rz, "err", err)
|
|
return ErrNoData
|
|
}
|
|
return err
|
|
}
|
|
index := strconv.Itoa(rz.Index)
|
|
|
|
descriptor := prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, "rapl", rz.Name+"_joules_total"),
|
|
"Current RAPL "+rz.Name+" value in joules",
|
|
[]string{"index", "path"}, nil,
|
|
)
|
|
|
|
ch <- prometheus.MustNewConstMetric(
|
|
descriptor,
|
|
prometheus.CounterValue,
|
|
float64(newMicrojoules)/1000000.0,
|
|
index,
|
|
rz.Path,
|
|
)
|
|
}
|
|
return nil
|
|
}
|