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Add kstat-based Solaris metrics (#1197)

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* collector/loadavg_solaris.go: Use libkstat to gather load averages.
* go.mod: Added go-kstat.
* boot_time_solaris.go: Added.
* cpu_solaris.go: Added.
* README.md: Updated entries for Solaris.
* collector/zfs_solaris.go: Added.
* CHANGELOG.md: Added note about kstat-based Solaris metrics.

Signed-off-by: Jonathan Davies <jpds@protonmail.com>
This commit is contained in:
Jon Davies 2019-01-12 12:33:56 +00:00 • committed by Ben Kochie
commit e766485286
9 changed files with 583 additions and 14 deletions
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52
collector/loadavg_solaris.go
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@ -16,21 +16,49 @@
package collector
import (
"errors"
"fmt"
"strconv"
"github.com/siebenmann/go-kstat"
)
/*
// Ensure "hrtime_t" is defined for sys/loadavg.h
#include <sys/time.h>
#include <sys/loadavg.h>
*/
// #include <sys/param.h>
import "C"
func getLoad() ([]float64, error) {
var loadavg [3]C.double
samples := C.getloadavg(&loadavg[0], 3)
if samples != 3 {
return nil, errors.New("failed to get load average")
func kstatToFloat(ks *kstat.KStat, kstatKey string) float64 {
kstatValue, err := ks.GetNamed(kstatKey)
if err != nil {
panic(err)
}
return []float64{float64(loadavg[0]), float64(loadavg[1]), float64(loadavg[2])}, nil
kstatLoadavg, err := strconv.ParseFloat(
fmt.Sprintf("%.2f", float64(kstatValue.UintVal)/C.FSCALE), 64)
if err != nil {
panic(err)
}
return kstatLoadavg
}
func getLoad() ([]float64, error) {
tok, err := kstat.Open()
if err != nil {
panic(err)
}
defer tok.Close()
ks, err := tok.Lookup("unix", 0, "system_misc")
if err != nil {
panic(err)
}
loadavg1Min := kstatToFloat(ks, "avenrun_1min")
loadavg5Min := kstatToFloat(ks, "avenrun_5min")
loadavg15Min := kstatToFloat(ks, "avenrun_15min")
return []float64{loadavg1Min, loadavg5Min, loadavg15Min}, nil
}