telegraf/plugins/inputs/system/netstat.go

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package system
import (
"fmt"
"syscall"
"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
)
type NetStats struct {
ps PS
}
func (_ *NetStats) Description() string {
return "Read TCP metrics such as established, time wait and sockets counts."
}
var tcpstatSampleConfig = ""
func (_ *NetStats) SampleConfig() string {
return tcpstatSampleConfig
}
func (s *NetStats) Gather(acc telegraf.Accumulator) error {
netconns, err := s.ps.NetConnections()
if err != nil {
return fmt.Errorf("error getting net connections info: %s", err)
}
counts := make(map[string]int)
counts["UDP"] = 0
// TODO: add family to tags or else
tags := map[string]string{}
for _, netcon := range netconns {
if netcon.Type == syscall.SOCK_DGRAM {
counts["UDP"] += 1
continue // UDP has no status
}
c, ok := counts[netcon.Status]
if !ok {
counts[netcon.Status] = 0
}
counts[netcon.Status] = c + 1
}
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fields := map[string]interface{}{
"tcp_established": counts["ESTABLISHED"],
"tcp_syn_sent": counts["SYN_SENT"],
"tcp_syn_recv": counts["SYN_RECV"],
"tcp_fin_wait1": counts["FIN_WAIT1"],
"tcp_fin_wait2": counts["FIN_WAIT2"],
"tcp_time_wait": counts["TIME_WAIT"],
"tcp_close": counts["CLOSE"],
"tcp_close_wait": counts["CLOSE_WAIT"],
"tcp_last_ack": counts["LAST_ACK"],
"tcp_listen": counts["LISTEN"],
"tcp_closing": counts["CLOSING"],
"tcp_none": counts["NONE"],
"udp_socket": counts["UDP"],
}
acc.AddFields("netstat", fields, tags)
return nil
}
func init() {
inputs.Add("netstat", func() telegraf.Input {
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return &NetStats{ps: newSystemPS()}
})
}