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