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// 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.
// +build !nothermalzone
package collector
import (
"fmt"
"github.com/go-kit/kit/log"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs/sysfs"
)
const coolingDevice = "cooling_device"
const thermalZone = "thermal_zone"
type thermalZoneCollector struct {
fs sysfs.FS
coolingDeviceCurState *prometheus.Desc
coolingDeviceMaxState *prometheus.Desc
zoneTemp *prometheus.Desc
logger log.Logger
}
func init() {
registerCollector("thermal_zone", defaultEnabled, NewThermalZoneCollector)
}
// NewThermalZoneCollector returns a new Collector exposing kernel/system statistics.
func NewThermalZoneCollector(logger log.Logger) (Collector, error) {
fs, err := sysfs.NewFS(*sysPath)
if err != nil {
return nil, fmt.Errorf("failed to open sysfs: %w", err)
}
return &thermalZoneCollector{
fs: fs,
zoneTemp: prometheus.NewDesc(
prometheus.BuildFQName(namespace, thermalZone, "temp"),
"Zone temperature in Celsius",
[]string{"zone", "type"}, nil,
),
coolingDeviceCurState: prometheus.NewDesc(
prometheus.BuildFQName(namespace, coolingDevice, "cur_state"),
"Current throttle state of the cooling device",
[]string{"name", "type"}, nil,
),
coolingDeviceMaxState: prometheus.NewDesc(
prometheus.BuildFQName(namespace, coolingDevice, "max_state"),
"Maximum throttle state of the cooling device",
[]string{"name", "type"}, nil,
),
logger: logger,
}, nil
}
func (c *thermalZoneCollector) Update(ch chan<- prometheus.Metric) error {
thermalZones, err := c.fs.ClassThermalZoneStats()
if err != nil {
return err
}
for _, stats := range thermalZones {
ch <- prometheus.MustNewConstMetric(
c.zoneTemp,
prometheus.GaugeValue,
float64(stats.Temp)/1000.0,
stats.Name,
stats.Type,
)
}
coolingDevices, err := c.fs.ClassCoolingDeviceStats()
if err != nil {
return err
}
for _, stats := range coolingDevices {
ch <- prometheus.MustNewConstMetric(
c.coolingDeviceCurState,
prometheus.GaugeValue,
float64(stats.CurState),
stats.Name,
stats.Type,
)
ch <- prometheus.MustNewConstMetric(
c.coolingDeviceMaxState,
prometheus.GaugeValue,
float64(stats.MaxState),
stats.Name,
stats.Type,
)
}
return nil
}
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