142 lines
3.5 KiB
Go
142 lines
3.5 KiB
Go
// +build !nonetdev
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bufio"
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/log"
|
|
)
|
|
|
|
const (
|
|
procNetDev = "/proc/net/dev"
|
|
netDevSubsystem = "network"
|
|
)
|
|
|
|
var (
|
|
fieldSep = regexp.MustCompile("[ :] *")
|
|
netdevIgnoredDevices = flag.String("collector.netdev.ignored-devices", "^$", "Regexp of net devices to ignore for netdev collector.")
|
|
)
|
|
|
|
type netDevCollector struct {
|
|
ignoredDevicesPattern *regexp.Regexp
|
|
|
|
metrics map[string]*prometheus.GaugeVec
|
|
}
|
|
|
|
func init() {
|
|
Factories["netdev"] = NewNetDevCollector
|
|
}
|
|
|
|
// Takes a prometheus registry and returns a new Collector exposing
|
|
// network device stats.
|
|
func NewNetDevCollector() (Collector, error) {
|
|
return &netDevCollector{
|
|
ignoredDevicesPattern: regexp.MustCompile(*netdevIgnoredDevices),
|
|
metrics: map[string]*prometheus.GaugeVec{},
|
|
}, nil
|
|
}
|
|
|
|
func (c *netDevCollector) Update(ch chan<- prometheus.Metric) (err error) {
|
|
netDev, err := getNetDevStats(c.ignoredDevicesPattern)
|
|
if err != nil {
|
|
return fmt.Errorf("Couldn't get netstats: %s", err)
|
|
}
|
|
for direction, devStats := range netDev {
|
|
for dev, stats := range devStats {
|
|
for t, value := range stats {
|
|
key := direction + "_" + t
|
|
if _, ok := c.metrics[key]; !ok {
|
|
c.metrics[key] = prometheus.NewGaugeVec(
|
|
prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Subsystem: netDevSubsystem,
|
|
Name: key,
|
|
Help: fmt.Sprintf("%s %s from /proc/net/dev.", t, direction),
|
|
},
|
|
[]string{"device"},
|
|
)
|
|
}
|
|
v, err := strconv.ParseFloat(value, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("Invalid value %s in netstats: %s", value, err)
|
|
}
|
|
c.metrics[key].WithLabelValues(dev).Set(v)
|
|
}
|
|
}
|
|
}
|
|
for _, m := range c.metrics {
|
|
m.Collect(ch)
|
|
}
|
|
return err
|
|
}
|
|
|
|
func getNetDevStats(ignore *regexp.Regexp) (map[string]map[string]map[string]string, error) {
|
|
file, err := os.Open(procNetDev)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
|
|
return parseNetDevStats(file, ignore)
|
|
}
|
|
|
|
func parseNetDevStats(r io.Reader, ignore *regexp.Regexp) (map[string]map[string]map[string]string, error) {
|
|
netDev := map[string]map[string]map[string]string{}
|
|
netDev["transmit"] = map[string]map[string]string{}
|
|
netDev["receive"] = map[string]map[string]string{}
|
|
|
|
scanner := bufio.NewScanner(r)
|
|
scanner.Scan() // skip first header
|
|
scanner.Scan()
|
|
parts := strings.Split(string(scanner.Text()), "|")
|
|
if len(parts) != 3 { // interface + receive + transmit
|
|
return nil, fmt.Errorf("Invalid header line in %s: %s",
|
|
procNetDev, scanner.Text())
|
|
}
|
|
header := strings.Fields(parts[1])
|
|
for scanner.Scan() {
|
|
line := strings.TrimLeft(string(scanner.Text()), " ")
|
|
parts := fieldSep.Split(line, -1)
|
|
if len(parts) != 2*len(header)+1 {
|
|
return nil, fmt.Errorf("Invalid line in %s: %s",
|
|
procNetDev, scanner.Text())
|
|
}
|
|
|
|
dev := parts[0][:len(parts[0])]
|
|
receive, err := parseNetDevLine(parts[1:len(header)+1], header)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
transmit, err := parseNetDevLine(parts[len(header)+1:], header)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if ignore.MatchString(dev) {
|
|
log.Debugf("Ignoring device: %s", dev)
|
|
continue
|
|
}
|
|
netDev["transmit"][dev] = transmit
|
|
netDev["receive"][dev] = receive
|
|
}
|
|
return netDev, nil
|
|
}
|
|
|
|
func parseNetDevLine(parts []string, header []string) (map[string]string, error) {
|
|
devStats := map[string]string{}
|
|
for i, v := range parts {
|
|
devStats[header[i]] = v
|
|
}
|
|
return devStats, nil
|
|
}
|