104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
// +build !nonetstat
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
const (
|
|
procNetStat = "/proc/net/netstat"
|
|
netStatsSubsystem = "netstat"
|
|
)
|
|
|
|
type netStatCollector struct {
|
|
config Config
|
|
metrics map[string]prometheus.Gauge
|
|
}
|
|
|
|
func init() {
|
|
Factories["netstat"] = NewNetStatCollector
|
|
}
|
|
|
|
// NewNetStatCollector takes a config struct and returns
|
|
// a new Collector exposing network stats.
|
|
func NewNetStatCollector(config Config) (Collector, error) {
|
|
return &netStatCollector{
|
|
config: config,
|
|
metrics: map[string]prometheus.Gauge{},
|
|
}, nil
|
|
}
|
|
|
|
func (c *netStatCollector) Update(ch chan<- prometheus.Metric) (err error) {
|
|
netStats, err := getNetStats()
|
|
if err != nil {
|
|
return fmt.Errorf("couldn't get netstats: %s", err)
|
|
}
|
|
for protocol, protocolStats := range netStats {
|
|
for name, value := range protocolStats {
|
|
key := protocol + "_" + name
|
|
if _, ok := c.metrics[key]; !ok {
|
|
c.metrics[key] = prometheus.NewGauge(
|
|
prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Subsystem: netStatsSubsystem,
|
|
Name: key,
|
|
Help: fmt.Sprintf("%s %s from /proc/net/netstat.", protocol, name),
|
|
},
|
|
)
|
|
}
|
|
v, err := strconv.ParseFloat(value, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("invalid value %s in netstats: %s", value, err)
|
|
}
|
|
c.metrics[key].Set(v)
|
|
}
|
|
}
|
|
for _, m := range c.metrics {
|
|
m.Collect(ch)
|
|
}
|
|
return err
|
|
}
|
|
|
|
func getNetStats() (map[string]map[string]string, error) {
|
|
file, err := os.Open(procNetStat)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
|
|
return parseNetStats(file)
|
|
}
|
|
|
|
func parseNetStats(r io.Reader) (map[string]map[string]string, error) {
|
|
var (
|
|
netStats = map[string]map[string]string{}
|
|
scanner = bufio.NewScanner(r)
|
|
)
|
|
|
|
for scanner.Scan() {
|
|
nameParts := strings.Split(string(scanner.Text()), " ")
|
|
scanner.Scan()
|
|
valueParts := strings.Split(string(scanner.Text()), " ")
|
|
// Remove trailing :.
|
|
protocol := nameParts[0][:len(nameParts[0])-1]
|
|
netStats[protocol] = map[string]string{}
|
|
if len(nameParts) != len(valueParts) {
|
|
return nil, fmt.Errorf("mismatch field count mismatch in %s: %s",
|
|
procNetStat, protocol)
|
|
}
|
|
for i := 1; i < len(nameParts); i++ {
|
|
netStats[protocol][nameParts[i]] = valueParts[i]
|
|
}
|
|
}
|
|
|
|
return netStats, nil
|
|
}
|