telegraf/plugins/inputs/system/system.go

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package system
import (
"bufio"
"bytes"
"fmt"
"os"
"runtime"
"strings"
"time"
"github.com/shirou/gopsutil/host"
"github.com/shirou/gopsutil/load"
"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
)
type SystemStats struct{}
func (_ *SystemStats) Description() string {
return "Read metrics about system load & uptime"
}
func (_ *SystemStats) SampleConfig() string { return "" }
func (_ *SystemStats) Gather(acc telegraf.Accumulator) error {
loadavg, err := load.Avg()
if err != nil && !strings.Contains(err.Error(), "not implemented") {
return err
}
fields := map[string]interface{}{
"load1": loadavg.Load1,
"load5": loadavg.Load5,
"load15": loadavg.Load15,
"n_cpus": runtime.NumCPU(),
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}
users, err := host.Users()
if err == nil {
fields["n_users"] = len(users)
} else if !os.IsPermission(err) {
return err
}
now := time.Now()
acc.AddGauge("system", fields, nil, now)
hostinfo, err := host.Info()
if err != nil {
return err
}
acc.AddCounter("system", map[string]interface{}{
"uptime": hostinfo.Uptime,
}, nil, now)
acc.AddFields("system", map[string]interface{}{
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"uptime_format": format_uptime(hostinfo.Uptime),
}, nil, now)
return nil
}
func format_uptime(uptime uint64) string {
buf := new(bytes.Buffer)
w := bufio.NewWriter(buf)
days := uptime / (60 * 60 * 24)
if days != 0 {
s := ""
if days > 1 {
s = "s"
}
fmt.Fprintf(w, "%d day%s, ", days, s)
}
minutes := uptime / 60
hours := minutes / 60
hours %= 24
minutes %= 60
fmt.Fprintf(w, "%2d:%02d", hours, minutes)
w.Flush()
return buf.String()
}
func init() {
inputs.Add("system", func() telegraf.Input {
return &SystemStats{}
})
}