77 lines
1.4 KiB
Go
77 lines
1.4 KiB
Go
|
// +build !noloadavg
|
||
|
|
|
||
|
|
package collector
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"io/ioutil"
|
||
|
|
"strconv"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"github.com/golang/glog"
|
||
|
|
"github.com/prometheus/client_golang/prometheus"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
procLoad = "/proc/loadavg"
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
load1 = prometheus.NewGauge()
|
||
|
|
)
|
||
|
|
|
||
|
|
type loadavgCollector struct {
|
||
|
|
registry prometheus.Registry
|
||
|
|
config Config
|
||
|
|
}
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
Factories["loadavg"] = NewLoadavgCollector
|
||
|
|
}
|
||
|
|
|
||
|
|
// Takes a config struct and prometheus registry and returns a new Collector exposing
|
||
|
|
// load, seconds since last login and a list of tags as specified by config.
|
||
|
|
func NewLoadavgCollector(config Config, registry prometheus.Registry) (Collector, error) {
|
||
|
|
c := loadavgCollector{
|
||
|
|
config: config,
|
||
|
|
registry: registry,
|
||
|
|
}
|
||
|
|
|
||
|
|
registry.Register(
|
||
|
|
"node_load1",
|
||
|
|
"1m load average",
|
||
|
|
prometheus.NilLabels,
|
||
|
|
load1,
|
||
|
|
)
|
||
|
|
return &c, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *loadavgCollector) Update() (updates int, err error) {
|
||
|
|
load, err := getLoad1()
|
||
|
|
if err != nil {
|
||
|
|
return updates, fmt.Errorf("Couldn't get load: %s", err)
|
||
|
|
}
|
||
|
|
updates++
|
||
|
|
glog.V(1).Infof("Set node_load: %f", load)
|
||
|
|
load1.Set(nil, load)
|
||
|
|
|
||
|
|
return updates, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func getLoad1() (float64, error) {
|
||
|
|
data, err := ioutil.ReadFile(procLoad)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
return parseLoad(string(data))
|
||
|
|
}
|
||
|
|
|
||
|
|
func parseLoad(data string) (float64, error) {
|
||
|
|
parts := strings.Fields(data)
|
||
|
|
load, err := strconv.ParseFloat(parts[0], 64)
|
||
|
|
if err != nil {
|
||
|
|
return 0, fmt.Errorf("Could not parse load '%s': %s", parts[0], err)
|
||
|
|
}
|
||
|
|
return load, nil
|
||
|
|
}
|