mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-09-19 23:57:30 -07:00
71 lines
1.7 KiB
Go
71 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
|
|
// +build !linux
|
|
|
|
package collector
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/log"
|
|
)
|
|
|
|
// #include <stdlib.h>
|
|
import "C"
|
|
|
|
type loadavgCollector struct {
|
|
metric prometheus.Gauge
|
|
}
|
|
|
|
func init() {
|
|
Factories["loadavg"] = NewLoadavgCollector
|
|
}
|
|
|
|
// Takes a prometheus registry and returns a new Collector exposing
|
|
// load1 stat.
|
|
func NewLoadavgCollector() (Collector, error) {
|
|
return &loadavgCollector{
|
|
metric: prometheus.NewGauge(prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Name: "load1",
|
|
Help: "1m load average.",
|
|
}),
|
|
}, nil
|
|
}
|
|
|
|
func (c *loadavgCollector) Update(ch chan<- prometheus.Metric) (err error) {
|
|
load, err := getLoad1()
|
|
if err != nil {
|
|
return fmt.Errorf("couldn't get load: %s", err)
|
|
}
|
|
log.Debugf("Set node_load: %f", load)
|
|
c.metric.Set(load)
|
|
c.metric.Collect(ch)
|
|
return err
|
|
}
|
|
|
|
func getLoad1() (float64, error) {
|
|
var loadavg [1]C.double
|
|
samples := C.getloadavg(&loadavg[0], 1)
|
|
if samples > 0 {
|
|
return float64(loadavg[0]), nil
|
|
} else {
|
|
return 0, errors.New("failed to get load average")
|
|
}
|
|
|
|
}
|