mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-25 13:44:10 -08:00
257 lines
8 KiB
Go
257 lines
8 KiB
Go
// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build !nonetdev && (linux || freebsd || openbsd || dragonfly || darwin || aix)
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// +build !nonetdev
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// +build linux freebsd openbsd dragonfly darwin aix
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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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"log/slog"
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"net"
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"strconv"
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"sync"
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"github.com/alecthomas/kingpin/v2"
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"github.com/prometheus/client_golang/prometheus"
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)
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var (
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netdevDeviceInclude = kingpin.Flag("collector.netdev.device-include", "Regexp of net devices to include (mutually exclusive to device-exclude).").String()
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oldNetdevDeviceInclude = kingpin.Flag("collector.netdev.device-whitelist", "DEPRECATED: Use collector.netdev.device-include").Hidden().String()
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netdevDeviceExclude = kingpin.Flag("collector.netdev.device-exclude", "Regexp of net devices to exclude (mutually exclusive to device-include).").String()
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oldNetdevDeviceExclude = kingpin.Flag("collector.netdev.device-blacklist", "DEPRECATED: Use collector.netdev.device-exclude").Hidden().String()
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netdevAddressInfo = kingpin.Flag("collector.netdev.address-info", "Collect address-info for every device").Bool()
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netdevDetailedMetrics = kingpin.Flag("collector.netdev.enable-detailed-metrics", "Use (incompatible) metric names that provide more detailed stats on Linux").Bool()
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)
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type netDevCollector struct {
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subsystem string
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deviceFilter deviceFilter
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metricDescsMutex sync.Mutex
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metricDescs map[string]*prometheus.Desc
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logger *slog.Logger
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}
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type netDevStats map[string]map[string]uint64
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func init() {
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registerCollector("netdev", defaultEnabled, NewNetDevCollector)
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}
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// NewNetDevCollector returns a new Collector exposing network device stats.
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func NewNetDevCollector(logger *slog.Logger) (Collector, error) {
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if *oldNetdevDeviceInclude != "" {
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if *netdevDeviceInclude == "" {
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logger.Warn("--collector.netdev.device-whitelist is DEPRECATED and will be removed in 2.0.0, use --collector.netdev.device-include")
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*netdevDeviceInclude = *oldNetdevDeviceInclude
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} else {
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return nil, errors.New("--collector.netdev.device-whitelist and --collector.netdev.device-include are mutually exclusive")
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}
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}
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if *oldNetdevDeviceExclude != "" {
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if *netdevDeviceExclude == "" {
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logger.Warn("--collector.netdev.device-blacklist is DEPRECATED and will be removed in 2.0.0, use --collector.netdev.device-exclude")
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*netdevDeviceExclude = *oldNetdevDeviceExclude
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} else {
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return nil, errors.New("--collector.netdev.device-blacklist and --collector.netdev.device-exclude are mutually exclusive")
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}
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}
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if *netdevDeviceExclude != "" && *netdevDeviceInclude != "" {
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return nil, errors.New("device-exclude & device-include are mutually exclusive")
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}
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if *netdevDeviceExclude != "" {
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logger.Info("Parsed flag --collector.netdev.device-exclude", "flag", *netdevDeviceExclude)
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}
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if *netdevDeviceInclude != "" {
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logger.Info("Parsed Flag --collector.netdev.device-include", "flag", *netdevDeviceInclude)
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}
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return &netDevCollector{
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subsystem: "network",
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deviceFilter: newDeviceFilter(*netdevDeviceExclude, *netdevDeviceInclude),
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metricDescs: map[string]*prometheus.Desc{},
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logger: logger,
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}, nil
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}
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func (c *netDevCollector) metricDesc(key string, labels []string) *prometheus.Desc {
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c.metricDescsMutex.Lock()
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defer c.metricDescsMutex.Unlock()
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if _, ok := c.metricDescs[key]; !ok {
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c.metricDescs[key] = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, c.subsystem, key+"_total"),
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fmt.Sprintf("Network device statistic %s.", key),
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labels,
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nil,
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)
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}
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return c.metricDescs[key]
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}
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func (c *netDevCollector) Update(ch chan<- prometheus.Metric) error {
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netDev, err := getNetDevStats(&c.deviceFilter, c.logger)
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if err != nil {
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return fmt.Errorf("couldn't get netstats: %w", err)
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}
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netDevLabels, err := getNetDevLabels()
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if err != nil {
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return fmt.Errorf("couldn't get netdev labels: %w", err)
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}
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for dev, devStats := range netDev {
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if !*netdevDetailedMetrics {
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legacy(devStats)
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}
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labels := []string{"device"}
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labelValues := []string{dev}
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if devLabels, exists := netDevLabels[dev]; exists {
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for labelName, labelValue := range devLabels {
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labels = append(labels, labelName)
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labelValues = append(labelValues, labelValue)
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}
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}
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for key, value := range devStats {
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desc := c.metricDesc(key, labels)
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ch <- prometheus.MustNewConstMetric(desc, prometheus.CounterValue, float64(value), labelValues...)
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}
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}
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if *netdevAddressInfo {
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interfaces, err := net.Interfaces()
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if err != nil {
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return fmt.Errorf("could not get network interfaces: %w", err)
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}
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desc := prometheus.NewDesc(prometheus.BuildFQName(namespace, "network_address",
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"info"), "node network address by device",
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[]string{"device", "address", "netmask", "scope"}, nil)
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for _, addr := range getAddrsInfo(interfaces) {
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ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, 1,
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addr.device, addr.addr, addr.netmask, addr.scope)
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}
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}
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return nil
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}
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type addrInfo struct {
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device string
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addr string
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scope string
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netmask string
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}
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func scope(ip net.IP) string {
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if ip.IsLoopback() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
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return "link-local"
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}
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if ip.IsInterfaceLocalMulticast() {
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return "interface-local"
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}
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if ip.IsGlobalUnicast() {
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return "global"
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}
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return ""
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}
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// getAddrsInfo returns interface name, address, scope and netmask for all interfaces.
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func getAddrsInfo(interfaces []net.Interface) []addrInfo {
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var res []addrInfo
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for _, ifs := range interfaces {
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addrs, _ := ifs.Addrs()
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for _, addr := range addrs {
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ip, ipNet, err := net.ParseCIDR(addr.String())
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if err != nil {
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continue
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}
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size, _ := ipNet.Mask.Size()
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res = append(res, addrInfo{
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device: ifs.Name,
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addr: ip.String(),
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scope: scope(ip),
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netmask: strconv.Itoa(size),
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})
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}
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}
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return res
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}
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// https://github.com/torvalds/linux/blob/master/net/core/net-procfs.c#L75-L97
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func legacy(metrics map[string]uint64) {
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if metric, ok := pop(metrics, "receive_errors"); ok {
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metrics["receive_errs"] = metric
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}
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if metric, ok := pop(metrics, "receive_dropped"); ok {
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metrics["receive_drop"] = metric + popz(metrics, "receive_missed_errors")
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}
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if metric, ok := pop(metrics, "receive_fifo_errors"); ok {
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metrics["receive_fifo"] = metric
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}
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if metric, ok := pop(metrics, "receive_frame_errors"); ok {
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metrics["receive_frame"] = metric + popz(metrics, "receive_length_errors") + popz(metrics, "receive_over_errors") + popz(metrics, "receive_crc_errors")
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}
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if metric, ok := pop(metrics, "multicast"); ok {
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metrics["receive_multicast"] = metric
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}
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if metric, ok := pop(metrics, "transmit_errors"); ok {
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metrics["transmit_errs"] = metric
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}
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if metric, ok := pop(metrics, "transmit_dropped"); ok {
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metrics["transmit_drop"] = metric
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}
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if metric, ok := pop(metrics, "transmit_fifo_errors"); ok {
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metrics["transmit_fifo"] = metric
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}
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if metric, ok := pop(metrics, "multicast"); ok {
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metrics["receive_multicast"] = metric
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}
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if metric, ok := pop(metrics, "collisions"); ok {
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metrics["transmit_colls"] = metric
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}
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if metric, ok := pop(metrics, "transmit_carrier_errors"); ok {
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metrics["transmit_carrier"] = metric + popz(metrics, "transmit_aborted_errors") + popz(metrics, "transmit_heartbeat_errors") + popz(metrics, "transmit_window_errors")
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}
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}
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func pop(m map[string]uint64, key string) (uint64, bool) {
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value, ok := m[key]
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delete(m, key)
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return value, ok
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}
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func popz(m map[string]uint64, key string) uint64 {
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if value, ok := m[key]; ok {
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delete(m, key)
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return value
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}
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return 0
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}
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