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Merge 3ca9f7d482 into be19d537cd

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Emin Umut Gerçek 2025-08-18 21:10:13 +08:00 committed by GitHub
parent be19d537cd 3ca9f7d482
commit 5a0cea0ec2
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GPG key ID: B5690EEEBB952194
1 changed files with 44 additions and 8 deletions
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52
collector/arp_linux.go
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@ -37,9 +37,20 @@ type arpCollector struct {
fs procfs.FS
deviceFilter deviceFilter
entries *prometheus.Desc
states *prometheus.Desc
logger *slog.Logger
}
var neighborStatesMap = map[uint16]string{
unix.NUD_INCOMPLETE: "incomplete",
unix.NUD_REACHABLE: "reachable",
unix.NUD_STALE: "stale",
unix.NUD_DELAY: "delay",
unix.NUD_PROBE: "probe",
unix.NUD_FAILED: "failed",
unix.NUD_PERMANENT: "permanent",
}
func init() {
registerCollector("arp", defaultEnabled, NewARPCollector)
}
@ -59,6 +70,11 @@ func NewARPCollector(logger *slog.Logger) (Collector, error) {
"ARP entries by device",
[]string{"device"}, nil,
),
states: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "arp", "states"),
"ARP states by device",
[]string{"device", "state"}, nil,
),
logger: logger,
}, nil
}
@ -73,10 +89,10 @@ func getTotalArpEntries(deviceEntries []procfs.ARPEntry) map[string]uint32 {
return entries
}
func getTotalArpEntriesRTNL() (map[string]uint32, error) {
func getArpEntriesRTNL() (map[string]uint32, map[string]map[uint16]uint32, error) {
conn, err := rtnl.Dial(nil)
if err != nil {
return nil, err
return nil, nil, err
}
defer conn.Close()
@ -84,29 +100,42 @@ func getTotalArpEntriesRTNL() (map[string]uint32, error) {
// restrict to AF_INET.
neighbors, err := conn.Neighbours(nil, unix.AF_INET)
if err != nil {
return nil, err
return nil, nil, err
}
// Map of interface name to ARP neighbor count.
entries := make(map[string]uint32)
// Map of map[InterfaceName]map[StateCode]CountOfTheState
states := make(map[string]map[uint16]uint32)
for _, n := range neighbors {
// Skip entries which have state NUD_NOARP to conform to output of /proc/net/arp.
if n.State&unix.NUD_NOARP == 0 {
entries[n.Interface.Name]++
if n.State&unix.NUD_NOARP == unix.NUD_NOARP {
continue
}
entries[n.Interface.Name]++
if _, ok := states[n.Interface.Name]; !ok {
states[n.Interface.Name] = make(map[uint16]uint32)
}
states[n.Interface.Name][n.State]++
}
return entries, nil
return entries, states, nil
}
func (c *arpCollector) Update(ch chan<- prometheus.Metric) error {
var enumeratedEntry map[string]uint32
var (
enumeratedEntry map[string]uint32
enumStates map[string]map[uint16]uint32
)
if *arpNetlink {
var err error
enumeratedEntry, err = getTotalArpEntriesRTNL()
enumeratedEntry, enumStates, err = getArpEntriesRTNL()
if err != nil {
return fmt.Errorf("could not get ARP entries: %w", err)
}
@ -125,6 +154,13 @@ func (c *arpCollector) Update(ch chan<- prometheus.Metric) error {
}
ch <- prometheus.MustNewConstMetric(
c.entries, prometheus.GaugeValue, float64(entryCount), device)
if *arpNetlink {
for state, count := range enumStates[device] {
ch <- prometheus.MustNewConstMetric(
c.states, prometheus.GaugeValue, float64(count), device, neighborStatesMap[state])
}
}
}
return nil