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tcpretrans

Measures retransmitted TCP packets.

Capabilities​

The tcpretrans plugin requires the CAP_SYS_ADMIN capability.

Architecture​

The plugin utilizes eBPF to gather data. The plugin does not generate Basic metrics. In Advanced mode (see Metric Modes), the plugin turns an eBPF result into an enriched Flow (adding Pod information based on IP), then sends the Flow to an external channel so that a tcpretrans module can create Pod-Level metrics.

Code locations​

  • Plugin and eBPF code: pkg/plugin/tcpretrans/
  • Module for extra Advanced metrics: pkg/module/metrics/tcpretrans.go

Metrics​

See metrics for Advanced Mode.