collector: support 1,5,15m load averages for all unices

This commit is contained in:
Nick Owens 2015-10-30 20:11:57 -07:00
commit 2cb489253c
3 changed files with 59 additions and 75 deletions

View file

@ -20,55 +20,8 @@ import (
"io/ioutil"
"strconv"
"strings"
"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
}
// Read loadavg from /proc.
func getLoad() (loads []float64, err error) {
data, err := ioutil.ReadFile(procFilePath("loadavg"))