node_exporter/collector/loadavg.go

68 lines
1.7 KiB
Go

// Copyright 2015 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 !noloadavg
package collector
import (
"fmt"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
)
type loadavgCollector struct {
metric []prometheus.Gauge
}
func init() {
Factories["loadavg"] = NewLoadavgCollector
}
// Take a prometheus registry and return a new Collector exposing load average.
func NewLoadavgCollector() (Collector, error) {
return &loadavgCollector{
metric: []prometheus.Gauge{
prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Name: "load1",
Help: "1m load average.",
}),
prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Name: "load5",
Help: "5m load average.",
}),
prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Name: "load15",
Help: "15m load average.",
}),
},
}, nil
}
func (c *loadavgCollector) Update(ch chan<- prometheus.Metric) (err error) {
loads, err := getLoad()
if err != nil {
return fmt.Errorf("couldn't get load: %s", err)
}
for i, load := range loads {
log.Debugf("Set load %d: %f", i, load)
c.metric[i].Set(load)
c.metric[i].Collect(ch)
}
return err
}