mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-25 06:16:26 +01:00
111 lines
2.9 KiB
Go
111 lines
2.9 KiB
Go
// +build !nonetdev
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package collector
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import (
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"errors"
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"fmt"
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"strconv"
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"github.com/prometheus/client_golang/prometheus"
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)
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/*
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#cgo CFLAGS: -D_IFI_OQDROPS
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <ifaddrs.h>
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#include <net/if.h>
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*/
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import "C"
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const (
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netDevSubsystem = "network"
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)
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type netDevCollector struct {
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metrics map[string]*prometheus.CounterVec
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}
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func init() {
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Factories["netdev"] = NewNetDevCollector
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}
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// Takes a prometheus registry and returns a new Collector exposing
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// Network device stats.
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func NewNetDevCollector() (Collector, error) {
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return &netDevCollector{
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metrics: map[string]*prometheus.CounterVec{},
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}, nil
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}
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func (c *netDevCollector) Update(ch chan<- prometheus.Metric) (err error) {
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netDev, err := getNetDevStats()
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if err != nil {
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return fmt.Errorf("couldn't get netstats: %s", err)
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}
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for direction, devStats := range netDev {
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for dev, stats := range devStats {
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for t, value := range stats {
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key := direction + "_" + t
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if _, ok := c.metrics[key]; !ok {
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c.metrics[key] = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: Namespace,
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Subsystem: netDevSubsystem,
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Name: key,
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Help: fmt.Sprintf("%s %s from getifaddrs().", t, direction),
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},
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[]string{"device"},
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)
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}
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v, err := strconv.ParseFloat(value, 64)
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if err != nil {
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return fmt.Errorf("invalid value %s in netstats: %s", value, err)
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}
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c.metrics[key].WithLabelValues(dev).Set(v)
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}
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}
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}
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for _, m := range c.metrics {
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m.Collect(ch)
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}
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return err
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}
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func getNetDevStats() (map[string]map[string]map[string]string, error) {
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netDev := map[string]map[string]map[string]string{}
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netDev["transmit"] = map[string]map[string]string{}
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netDev["receive"] = map[string]map[string]string{}
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var ifap, ifa *C.struct_ifaddrs
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if C.getifaddrs(&ifap) == -1 {
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return nil, errors.New("getifaddrs() failed")
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}
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defer C.freeifaddrs(ifap)
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for ifa = ifap; ifa != nil; ifa = ifa.ifa_next {
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if ifa.ifa_addr.sa_family == C.AF_LINK {
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receive := map[string]string{}
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transmit := map[string]string{}
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data := (*C.struct_if_data)(ifa.ifa_data)
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receive["packets"] = strconv.Itoa(int(data.ifi_ipackets))
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transmit["packets"] = strconv.Itoa(int(data.ifi_opackets))
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receive["errs"] = strconv.Itoa(int(data.ifi_ierrors))
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transmit["errs"] = strconv.Itoa(int(data.ifi_oerrors))
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receive["bytes"] = strconv.Itoa(int(data.ifi_ibytes))
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transmit["bytes"] = strconv.Itoa(int(data.ifi_obytes))
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receive["multicast"] = strconv.Itoa(int(data.ifi_imcasts))
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transmit["multicast"] = strconv.Itoa(int(data.ifi_omcasts))
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receive["drop"] = strconv.Itoa(int(data.ifi_iqdrops))
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transmit["drop"] = strconv.Itoa(int(data.ifi_oqdrops))
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netDev["receive"][C.GoString(ifa.ifa_name)] = receive
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netDev["transmit"][C.GoString(ifa.ifa_name)] = transmit
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}
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}
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return netDev, nil
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}
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