opnsense-exporter/internal/collector/arp_table.go

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package collector
import (
"fmt"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/st3ga/opnsense-exporter/opnsense"
)
type arpTableCollector struct {
log log.Logger
subsystem string
instance string
entries *prometheus.Desc
}
func init() {
collectorInstances = append(collectorInstances, &arpTableCollector{
subsystem: "arp_table",
})
}
func (c *arpTableCollector) Name() string {
return c.subsystem
}
func (c *arpTableCollector) Register(namespace, instance string, log log.Logger) {
c.log = log
c.instance = instance
level.Debug(c.log).
Log("msg", "Registering collector", "collector", c.Name())
c.entries = buildPrometheusDesc(c.subsystem, "entries",
"Arp entries by ip, mac, hostname, interface description, type, expired and permanent",
[]string{"ip", "mac", "hostname", "interface_description", "type", "expired", "permanent"},
)
// c.protocolStatistics = map[string]*prometheus.Desc{
// "arpSentRequests": buildPrometheusDesc(c.subsystem, "sent_requests_total",
// "Total number of sent arp requests.", nil),
// "arpReceivedRequests": buildPrometheusDesc(c.subsystem, "received_requests_total",
// "Total number of received arp requests", nil),
// "arpSentReplies": buildPrometheusDesc(c.subsystem, "sent_replies_total",
// "Total number of sent arp replies since OPNsense start.", nil),
// "arpReceivedReplies": buildPrometheusDesc(c.subsystem, "received_replies_total",
// "Total number of received arp replies", nil),
// "arpDroppedDuplicateAddress": buildPrometheusDesc(c.subsystem, "dropped_duplicate_address_total",
// "Total number of dropped arp requests due to duplicate address", nil),
// "arpEntriesTimeout": buildPrometheusDesc(c.subsystem, "entries_timeout_total",
// "Total number of arp entries that timed out", nil),
// "arpDroppedNoEntry": buildPrometheusDesc(c.subsystem, "dropped_no_entry_total",
// "Total number of dropped arp requests due to no entry", nil),
// }
}
func (c *arpTableCollector) Describe(ch chan<- *prometheus.Desc) {
ch <- c.entries
}
func (c *arpTableCollector) Update(client *opnsense.Client, ch chan<- prometheus.Metric) *opnsense.APICallError {
data, err := client.FetchArpTable()
if err != nil {
return err
}
for _, arp := range data.Arp {
ch <- prometheus.MustNewConstMetric(
c.entries,
prometheus.GaugeValue,
1,
arp.IP,
arp.Mac,
arp.Hostname,
arp.IntfDescription,
arp.Type,
fmt.Sprintf("%t", arp.Expired),
fmt.Sprintf("%t", arp.Permanent),
c.instance,
)
}
return nil
}