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prober: record total bytes transferred in DERP bandwidth probes

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This will enable Prometheus queries to look at the bandwidth over time windows,
for example 'increase(derp_bw_bytes_total)[1h] / increase(derp_bw_transfer_time_seconds_total)[1h]'.

Updates tailscale/corp#25503

Signed-off-by: Percy Wegmann <percy@tailscale.com>
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Percy Wegmann 2025-01-08 10:36:35 -06:00 committed by Percy Wegmann
parent 68997e0dfa
commit a51672cafd
1 changed files with 1 additions and 0 deletions
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prober/derp.go
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@ -318,6 +318,7 @@ func (d *derpProber) probeBandwidth(from, to string, size int64) ProbeClass {
return []prometheus.Metric{
prometheus.MustNewConstMetric(prometheus.NewDesc("derp_bw_probe_size_bytes", "Payload size of the bandwidth prober", nil, l), prometheus.GaugeValue, float64(size)),
prometheus.MustNewConstMetric(prometheus.NewDesc("derp_bw_transfer_time_seconds_total", "Time it took to transfer data", nil, l), prometheus.CounterValue, transferTimeSeconds.Value()),
prometheus.MustNewConstMetric(prometheus.NewDesc("derp_bw_bytes_total", "Amount of data transferred", nil, l), prometheus.CounterValue, float64(size)),
}
},
}