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|
// Copyright 2021 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !noethtool
// +build !noethtool
// The hard work of collecting data from the kernel via the ethtool interfaces is done by
// https://github.com/safchain/ethtool/
// by Sylvain Afchain. Used under the Apache license.
package collector
import (
"errors"
"fmt"
"log/slog"
"os"
"regexp"
"sort"
"strings"
"sync"
"syscall"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs/sysfs"
"github.com/safchain/ethtool"
"golang.org/x/sys/unix"
"gopkg.in/alecthomas/kingpin.v2"
)
var (
ethtoolDeviceInclude = kingpin.Flag("collector.ethtool.device-include", "Regexp of ethtool devices to include (mutually exclusive to device-exclude).").String()
ethtoolDeviceExclude = kingpin.Flag("collector.ethtool.device-exclude", "Regexp of ethtool devices to exclude (mutually exclusive to device-include).").String()
ethtoolIncludedMetrics = kingpin.Flag("collector.ethtool.metrics-include", "Regexp of ethtool stats to include.").Default(".*").String()
ethtoolReceivedRegex = regexp.MustCompile(`(^|_)rx(_|$)`)
ethtoolTransmitRegex = regexp.MustCompile(`(^|_)tx(_|$)`)
)
type Ethtool interface {
DriverInfo(string) (ethtool.DrvInfo, error)
Stats(string) (map[string]uint64, error)
LinkInfo(string) (ethtool.EthtoolCmd, error)
}
type ethtoolLibrary struct {
ethtool *ethtool.Ethtool
}
func (e *ethtoolLibrary) DriverInfo(intf string) (ethtool.DrvInfo, error) {
return e.ethtool.DriverInfo(intf)
}
func (e *ethtoolLibrary) Stats(intf string) (map[string]uint64, error) {
return e.ethtool.Stats(intf)
}
func (e *ethtoolLibrary) LinkInfo(intf string) (ethtool.EthtoolCmd, error) {
var ethtoolCmd ethtool.EthtoolCmd
_, err := ethtoolCmd.CmdGet(intf)
return ethtoolCmd, err
}
type ethtoolCollector struct {
fs sysfs.FS
entries map[string]*prometheus.Desc
entriesMutex sync.Mutex
ethtool Ethtool
deviceFilter deviceFilter
infoDesc *prometheus.Desc
metricsPattern *regexp.Regexp
logger *slog.Logger
}
// makeEthtoolCollector is the internal constructor for EthtoolCollector.
// This allows NewEthtoolTestCollector to override its .ethtool interface
// for testing.
func makeEthtoolCollector(logger *slog.Logger) (*ethtoolCollector, error) {
fs, err := sysfs.NewFS(*sysPath)
if err != nil {
return nil, fmt.Errorf("failed to open sysfs: %w", err)
}
e, err := ethtool.NewEthtool()
if err != nil {
return nil, fmt.Errorf("failed to initialize ethtool library: %w", err)
}
if *ethtoolDeviceInclude != "" {
logger.Info("Parsed flag --collector.ethtool.device-include", "flag", *ethtoolDeviceInclude)
}
if *ethtoolDeviceExclude != "" {
logger.Info("Parsed flag --collector.ethtool.device-exclude", "flag", *ethtoolDeviceExclude)
}
if *ethtoolIncludedMetrics != "" {
logger.Info("Parsed flag --collector.ethtool.metrics-include", "flag", *ethtoolIncludedMetrics)
}
// Pre-populate some common ethtool metrics.
return ðtoolCollector{
fs: fs,
ethtool: ðtoolLibrary{e},
deviceFilter: newDeviceFilter(*ethtoolDeviceExclude, *ethtoolDeviceInclude),
metricsPattern: regexp.MustCompile(*ethtoolIncludedMetrics),
logger: logger,
entries: map[string]*prometheus.Desc{
"rx_bytes": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "received_bytes_total"),
"Network interface bytes received",
[]string{"device"}, nil,
),
"rx_dropped": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "received_dropped_total"),
"Number of received frames dropped",
[]string{"device"}, nil,
),
"rx_errors": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "received_errors_total"),
"Number of received frames with errors",
[]string{"device"}, nil,
),
"rx_packets": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "received_packets_total"),
"Network interface packets received",
[]string{"device"}, nil,
),
"tx_bytes": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "transmitted_bytes_total"),
"Network interface bytes sent",
[]string{"device"}, nil,
),
"tx_errors": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "transmitted_errors_total"),
"Number of sent frames with errors",
[]string{"device"}, nil,
),
"tx_packets": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "transmitted_packets_total"),
"Network interface packets sent",
[]string{"device"}, nil,
),
// link info
"supported_port": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "supported_port_info"),
"Type of ports or PHYs supported by network device",
[]string{"device", "type"}, nil,
),
"supported_speed": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "supported_speed_bytes"),
"Combination of speeds and features supported by network device",
[]string{"device", "duplex", "mode"}, nil,
),
"supported_autonegotiate": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "autonegotiate_supported"),
"If this port device supports autonegotiate",
[]string{"device"}, nil,
),
"supported_pause": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "pause_supported"),
"If this port device supports pause frames",
[]string{"device"}, nil,
),
"supported_asymmetricpause": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "asymmetricpause_supported"),
"If this port device supports asymmetric pause frames",
[]string{"device"}, nil,
),
"advertised_speed": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "advertised_speed_bytes"),
"Combination of speeds and features offered by network device",
[]string{"device", "duplex", "mode"}, nil,
),
"advertised_autonegotiate": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "autonegotiate_advertised"),
"If this port device offers autonegotiate",
[]string{"device"}, nil,
),
"advertised_pause": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "pause_advertised"),
"If this port device offers pause capability",
[]string{"device"}, nil,
),
"advertised_asymmetricpause": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "asymmetricpause_advertised"),
"If this port device offers asymmetric pause capability",
[]string{"device"}, nil,
),
"autonegotiate": prometheus.NewDesc(
prometheus.BuildFQName(namespace, "network", "autonegotiate"),
"If this port is using autonegotiate",
[]string{"device"}, nil,
),
},
infoDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "ethtool", "info"),
"A metric with a constant '1' value labeled by bus_info, device, driver, expansion_rom_version, firmware_version, version.",
[]string{"bus_info", "device", "driver", "expansion_rom_version", "firmware_version", "version"}, nil,
),
}, nil
}
func init() {
registerCollector("ethtool", defaultDisabled, NewEthtoolCollector)
}
// Generate the fully-qualified metric name for the ethool metric.
func buildEthtoolFQName(metric string) string {
metricName := strings.TrimLeft(strings.ToLower(SanitizeMetricName(metric)), "_")
metricName = ethtoolReceivedRegex.ReplaceAllString(metricName, "${1}received${2}")
metricName = ethtoolTransmitRegex.ReplaceAllString(metricName, "${1}transmitted${2}")
return prometheus.BuildFQName(namespace, "ethtool", metricName)
}
// NewEthtoolCollector returns a new Collector exposing ethtool stats.
func NewEthtoolCollector(logger *slog.Logger) (Collector, error) {
return makeEthtoolCollector(logger)
}
// updatePortCapabilities generates metrics for autonegotiate, pause and asymmetricpause.
// The bit offsets here correspond to ethtool_link_mode_bit_indices in linux/include/uapi/linux/ethtool.h
// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/ethtool.h
func (c *ethtoolCollector) updatePortCapabilities(ch chan<- prometheus.Metric, prefix string, device string, linkModes uint32) {
var (
autonegotiate = 0.0
pause = 0.0
asymmetricPause = 0.0
)
if linkModes&(1<<unix.ETHTOOL_LINK_MODE_Autoneg_BIT) != 0 {
autonegotiate = 1.0
}
if linkModes&(1<<unix.ETHTOOL_LINK_MODE_Pause_BIT) != 0 {
pause = 1.0
}
if linkModes&(1<<unix.ETHTOOL_LINK_MODE_Asym_Pause_BIT) != 0 {
asymmetricPause = 1.0
}
ch <- prometheus.MustNewConstMetric(c.entry(fmt.Sprintf("%s_autonegotiate", prefix)), prometheus.GaugeValue, autonegotiate, device)
ch <- prometheus.MustNewConstMetric(c.entry(fmt.Sprintf("%s_pause", prefix)), prometheus.GaugeValue, pause, device)
ch <- prometheus.MustNewConstMetric(c.entry(fmt.Sprintf("%s_asymmetricpause", prefix)), prometheus.GaugeValue, asymmetricPause, device)
}
// updatePortInfo generates port type metrics to indicate if the network devices supports Twisted Pair, optical fiber, etc.
// The bit offsets here correspond to ethtool_link_mode_bit_indices in linux/include/uapi/linux/ethtool.h
// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/ethtool.h
func (c *ethtoolCollector) updatePortInfo(ch chan<- prometheus.Metric, device string, linkModes uint32) {
for name, bit := range map[string]int{
"TP": unix.ETHTOOL_LINK_MODE_TP_BIT,
"AUI": unix.ETHTOOL_LINK_MODE_AUI_BIT,
"MII": unix.ETHTOOL_LINK_MODE_MII_BIT,
"FIBRE": unix.ETHTOOL_LINK_MODE_FIBRE_BIT,
"BNC": unix.ETHTOOL_LINK_MODE_BNC_BIT,
"Backplane": unix.ETHTOOL_LINK_MODE_Backplane_BIT,
} {
if linkModes&(1<<bit) != 0 {
ch <- prometheus.MustNewConstMetric(c.entry("supported_port"), prometheus.GaugeValue, 1.0, device, name)
}
}
}
// updateSpeeds generates metrics corresponding to the speeds and duplex modes supported or advertised by the network device.
// The bit offsets here correspond to ethtool_link_mode_bit_indices in linux/include/uapi/linux/ethtool.h
// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/ethtool.h
func (c *ethtoolCollector) updateSpeeds(ch chan<- prometheus.Metric, prefix string, device string, linkModes uint32) {
linkMode := fmt.Sprintf("%s_speed", prefix)
const (
full = "full"
half = "half"
// This is in _bytes_ to match bytes-per-second speeds from netclass.
Mbps = 1000000.0 / 8.0
)
for bit, labels := range map[int]struct {
speed int
duplex string
phy string
}{
unix.ETHTOOL_LINK_MODE_10baseT_Half_BIT: {10, half, "T"},
unix.ETHTOOL_LINK_MODE_10baseT_Full_BIT: {10, full, "T"},
unix.ETHTOOL_LINK_MODE_100baseT_Half_BIT: {100, half, "T"},
unix.ETHTOOL_LINK_MODE_100baseT_Full_BIT: {100, full, "T"},
unix.ETHTOOL_LINK_MODE_1000baseT_Half_BIT: {1000, half, "T"},
unix.ETHTOOL_LINK_MODE_1000baseT_Full_BIT: {1000, full, "T"},
unix.ETHTOOL_LINK_MODE_10000baseT_Full_BIT: {10000, full, "T"},
unix.ETHTOOL_LINK_MODE_2500baseT_Full_BIT: {2500, full, "T"},
unix.ETHTOOL_LINK_MODE_1000baseKX_Full_BIT: {1000, full, "KX"},
unix.ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT: {10000, full, "KX4"},
unix.ETHTOOL_LINK_MODE_10000baseKR_Full_BIT: {10000, full, "KR"},
unix.ETHTOOL_LINK_MODE_10000baseR_FEC_BIT: {10000, full, "R_FEC"},
unix.ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT: {20000, full, "MLD2"},
unix.ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT: {20000, full, "KR2"},
unix.ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT: {40000, full, "KR4"},
unix.ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT: {40000, full, "CR4"},
unix.ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT: {40000, full, "SR4"},
unix.ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT: {40000, full, "LR4"},
unix.ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT: {56000, full, "KR4"},
unix.ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT: {56000, full, "CR4"},
unix.ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT: {56000, full, "SR4"},
unix.ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT: {56000, full, "LR4"},
unix.ETHTOOL_LINK_MODE_25000baseCR_Full_BIT: {25000, full, "CR"},
unix.ETHTOOL_LINK_MODE_25000baseKR_Full_BIT: {25000, full, "KR"},
unix.ETHTOOL_LINK_MODE_25000baseSR_Full_BIT: {25000, full, "SR"},
unix.ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT: {50000, full, "CR2"},
unix.ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT: {50000, full, "KR2"},
unix.ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT: {100000, full, "KR4"},
unix.ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT: {100000, full, "SR4"},
unix.ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT: {100000, full, "CR4"},
unix.ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT: {100000, full, "R4_ER4"},
unix.ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT: {50000, full, "SR2"},
unix.ETHTOOL_LINK_MODE_1000baseX_Full_BIT: {1000, full, "X"},
unix.ETHTOOL_LINK_MODE_10000baseCR_Full_BIT: {10000, full, "CR"},
unix.ETHTOOL_LINK_MODE_10000baseSR_Full_BIT: {10000, full, "SR"},
unix.ETHTOOL_LINK_MODE_10000baseLR_Full_BIT: {10000, full, "LR"},
unix.ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT: {10000, full, "LRM"},
unix.ETHTOOL_LINK_MODE_10000baseER_Full_BIT: {10000, full, "ER"},
unix.ETHTOOL_LINK_MODE_5000baseT_Full_BIT: {5000, full, "T"},
unix.ETHTOOL_LINK_MODE_50000baseKR_Full_BIT: {50000, full, "KR"},
unix.ETHTOOL_LINK_MODE_50000baseSR_Full_BIT: {50000, full, "SR"},
unix.ETHTOOL_LINK_MODE_50000baseCR_Full_BIT: {50000, full, "CR"},
unix.ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT: {50000, full, "LR_ER_FR"},
unix.ETHTOOL_LINK_MODE_50000baseDR_Full_BIT: {50000, full, "DR"},
unix.ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT: {100000, full, "KR2"},
unix.ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT: {100000, full, "SR2"},
unix.ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT: {100000, full, "CR2"},
unix.ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT: {100000, full, "LR2_ER2_FR2"},
unix.ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT: {100000, full, "DR2"},
unix.ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT: {200000, full, "KR4"},
unix.ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT: {200000, full, "SR4"},
unix.ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT: {200000, full, "LR4_ER4_FR4"},
unix.ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT: {200000, full, "DR4"},
unix.ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT: {200000, full, "CR4"},
unix.ETHTOOL_LINK_MODE_100baseT1_Full_BIT: {100, full, "T1"},
unix.ETHTOOL_LINK_MODE_1000baseT1_Full_BIT: {1000, full, "T1"},
unix.ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT: {400000, full, "KR8"},
unix.ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT: {400000, full, "SR8"},
unix.ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT: {400000, full, "LR8_ER8_FR8"},
unix.ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT: {400000, full, "DR8"},
unix.ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT: {400000, full, "CR8"},
unix.ETHTOOL_LINK_MODE_100000baseKR_Full_BIT: {100000, full, "KR"},
unix.ETHTOOL_LINK_MODE_100000baseSR_Full_BIT: {100000, full, "SR"},
unix.ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT: {100000, full, "LR_ER_FR"},
unix.ETHTOOL_LINK_MODE_100000baseCR_Full_BIT: {100000, full, "CR"},
unix.ETHTOOL_LINK_MODE_100000baseDR_Full_BIT: {100000, full, "DR"},
unix.ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT: {200000, full, "KR2"},
unix.ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT: {200000, full, "SR2"},
unix.ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT: {200000, full, "LR2_ER2_FR2"},
unix.ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT: {200000, full, "DR2"},
unix.ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT: {200000, full, "CR2"},
unix.ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT: {400000, full, "KR4"},
unix.ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT: {400000, full, "SR4"},
unix.ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT: {400000, full, "LR4_ER4_FR4"},
unix.ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT: {400000, full, "DR4"},
unix.ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT: {400000, full, "CR4"},
unix.ETHTOOL_LINK_MODE_100baseFX_Half_BIT: {100, half, "FX"},
unix.ETHTOOL_LINK_MODE_100baseFX_Full_BIT: {100, full, "FX"},
} {
if linkModes&(1<<bit) != 0 {
ch <- prometheus.MustNewConstMetric(c.entry(linkMode), prometheus.GaugeValue,
float64(labels.speed)*Mbps, device, labels.duplex, fmt.Sprintf("%dbase%s", labels.speed, labels.phy))
}
}
}
func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
netClass, err := c.fs.NetClassDevices()
if err != nil {
if errors.Is(err, os.ErrNotExist) || errors.Is(err, os.ErrPermission) {
c.logger.Debug("Could not read netclass file", "err", err)
return ErrNoData
}
return fmt.Errorf("could not get net class info: %w", err)
}
if len(netClass) == 0 {
return fmt.Errorf("no network devices found")
}
for _, device := range netClass {
var stats map[string]uint64
var err error
if c.deviceFilter.ignored(device) {
continue
}
linkInfo, err := c.ethtool.LinkInfo(device)
if err == nil {
c.updateSpeeds(ch, "supported", device, linkInfo.Supported)
c.updatePortInfo(ch, device, linkInfo.Supported)
c.updatePortCapabilities(ch, "supported", device, linkInfo.Supported)
c.updateSpeeds(ch, "advertised", device, linkInfo.Advertising)
c.updatePortCapabilities(ch, "advertised", device, linkInfo.Advertising)
ch <- prometheus.MustNewConstMetric(c.entry("autonegotiate"), prometheus.GaugeValue, float64(linkInfo.Autoneg), device)
} else {
if errno, ok := err.(syscall.Errno); ok {
if err == unix.EOPNOTSUPP {
c.logger.Debug("ethtool link info error", "err", err, "device", device, "errno", uint(errno))
} else if errno != 0 {
c.logger.Error("ethtool link info error", "err", err, "device", device, "errno", uint(errno))
}
} else {
c.logger.Error("ethtool link info error", "err", err, "device", device)
}
}
drvInfo, err := c.ethtool.DriverInfo(device)
if err == nil {
ch <- prometheus.MustNewConstMetric(c.infoDesc, prometheus.GaugeValue, 1.0,
drvInfo.BusInfo, device, drvInfo.Driver, drvInfo.EromVersion, drvInfo.FwVersion, drvInfo.Version)
} else {
if errno, ok := err.(syscall.Errno); ok {
if err == unix.EOPNOTSUPP {
c.logger.Debug("ethtool driver info error", "err", err, "device", device, "errno", uint(errno))
} else if errno != 0 {
c.logger.Error("ethtool driver info error", "err", err, "device", device, "errno", uint(errno))
}
} else {
c.logger.Error("ethtool driver info error", "err", err, "device", device)
}
}
stats, err = c.ethtool.Stats(device)
// If Stats() returns EOPNOTSUPP it doesn't support ethtool stats. Log that only at Debug level.
// Otherwise log it at Error level.
if err != nil {
if errno, ok := err.(syscall.Errno); ok {
if err == unix.EOPNOTSUPP {
c.logger.Debug("ethtool stats error", "err", err, "device", device, "errno", uint(errno))
} else if errno != 0 {
c.logger.Error("ethtool stats error", "err", err, "device", device, "errno", uint(errno))
}
} else {
c.logger.Error("ethtool stats error", "err", err, "device", device)
}
}
if stats == nil || len(stats) < 1 {
// No stats returned; device does not support ethtool stats.
continue
}
// Sanitizing the metric names can lead to duplicate metric names. Therefore check for clashes beforehand.
metricFQNames := make(map[string]string)
for metric := range stats {
metricName := SanitizeMetricName(metric)
if !c.metricsPattern.MatchString(metricName) {
continue
}
metricFQName := buildEthtoolFQName(metricName)
existingMetric, exists := metricFQNames[metricFQName]
if exists {
c.logger.Debug("dropping duplicate metric name", "device", device,
"metricFQName", metricFQName, "metric1", existingMetric, "metric2", metricName)
// Keep the metricName as "deleted" in the dict in case there are 3 duplicates.
metricFQNames[metricFQName] = ""
} else {
metricFQNames[metricFQName] = metricName
}
}
// Sort metric names so that the test fixtures will match up
keys := make([]string, 0, len(metricFQNames))
for k := range metricFQNames {
keys = append(keys, k)
}
sort.Strings(keys)
for _, metricFQName := range keys {
metric := metricFQNames[metricFQName]
if metric == "" {
// Skip the "deleted" duplicate metrics
continue
}
val := stats[metric]
// Check to see if this metric exists; if not then create it and store it in c.entries.
entry := c.entryWithCreate(metric, metricFQName)
ch <- prometheus.MustNewConstMetric(
entry, prometheus.UntypedValue, float64(val), device)
}
}
return nil
}
func (c *ethtoolCollector) entryWithCreate(key, metricFQName string) *prometheus.Desc {
c.entriesMutex.Lock()
defer c.entriesMutex.Unlock()
if _, ok := c.entries[key]; !ok {
c.entries[key] = prometheus.NewDesc(
metricFQName,
fmt.Sprintf("Network interface %s", key),
[]string{"device"}, nil,
)
}
return c.entries[key]
}
func (c *ethtoolCollector) entry(key string) *prometheus.Desc {
c.entriesMutex.Lock()
defer c.entriesMutex.Unlock()
return c.entries[key]
}
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