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net collector

The net collector exposes metrics about network interfaces


Metric name prefix	`net`
Data source	Perflib
Classes	`Win32_PerfRawData_Tcpip_NetworkInterface`
Enabled by default?	Yes

Flags

`--collector.net.nic-include`

If given, an interface name needs to match the include regexp in order for the corresponding metrics to be reported

`--collector.net.nic-exclude`

If given, an interface name needs to not match the exclude regexp in order for the corresponding metrics to be reported

Metrics

Name	Description	Type	Labels
`windows_net_bytes_received_total`	Total bytes received by interface	counter	`nic`
`windows_net_bytes_sent_total`	Total bytes transmitted by interface	counter	`nic`
`windows_net_bytes_total`	Total bytes received and transmitted by interface	counter	`nic`
`windows_net_output_queue_length_packets`	Length of the output packet queue (in packets). If this is longer than 2, delays occur.	gauge	`nic`
`windows_net_packets_outbound_discarded_total`	Total outbound packets that were chosen to be discarded even though no errors had been detected to prevent transmission	counter	`nic`
`windows_net_packets_outbound_errors_total`	Total packets that could not be transmitted due to errors	counter	`nic`
`windows_net_packets_received_discarded_total`	Total inbound packets that were chosen to be discarded even though no errors had been detected to prevent delivery	counter	`nic`
`windows_net_packets_received_errors_total`	Total packets that could not be received due to errors	counter	`nic`
`windows_net_packets_received_total`	Total packets received by interface	counter	`nic`
`windows_net_packets_received_unknown_total`	Total packets received by interface that were discarded because of an unknown or unsupported protocol	counter	`nic`
`windows_net_packets_total`	Total packets received and transmitted by interface	counter	`nic`
`windows_net_packets_sent_total`	Total packets transmitted by interface	counter	`nic`
`windows_net_current_bandwidth_bytes`	Estimate of the interface's current bandwidth in bytes per second	gauge	`nic`

Example metric

Query the rate of transmitted network traffic

rate(windows_net_bytes_sent_total{instance="localhost"}[2m])

Useful queries

Get total utilisation of network interface as a percentage

rate(windows_net_bytes_total{instance="localhost", nic="Microsoft_Hyper_V_Network_Adapter__1"}[2m]) / windows_net_current_bandwidth_bytes{instance="localhost", nic="Microsoft_Hyper_V_Network_Adapter__1"} * 100

Alerting examples

prometheus.rules

- alert: NetInterfaceUsage
  expr: rate(windows_net_bytes_total[2m]) / windows_net_current_bandwidth_bytes * 100 > 95
  for: 10m
  labels:
    severity: high
  annotations:
    summary: "Network Interface Usage (instance {{ $labels.instance }})"
    description: "Network traffic usage is greater than 95% for interface {{ $labels.nic }}\n  VALUE = {{ $value }}\n  LABELS: {{ $labels }}"

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