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Update broker metrics to count matches, denials, and timeouts

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Our metrics were undercounting client polls by missing the case where
clients are matched with a snowflake but receive a timeout before the
snowflake responds with its answer. This change adds a new metric,
called client-snowflake-timeout-count, to the 24 hour broker stats and a
new "timeout" status label for prometheus metrics.
This commit is contained in:
Cecylia Bocovich 2025-03-06 13:45:07 -05:00
parent 583178f4f2
commit 57dc276e48
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GPG key ID: 009DE379FD9B7B90
4 changed files with 27 additions and 10 deletions
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9
broker/ipc.go
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@ -199,7 +199,7 @@ func (i *IPC) ClientOffers(arg messages.Arg, response *[]byte) error {
snowflake.offerChannel <- offer
} else {
i.ctx.metrics.lock.Lock()
i.ctx.metrics.UpdateRendezvousStats(arg.RemoteAddr, arg.RendezvousMethod, offer.natType, false)
i.ctx.metrics.UpdateRendezvousStats(arg.RemoteAddr, arg.RendezvousMethod, offer.natType, "denied")
i.ctx.metrics.lock.Unlock()
resp := &messages.ClientPollResponse{Error: messages.StrNoProxies}
return sendClientResponse(resp, response)
@ -209,7 +209,7 @@ func (i *IPC) ClientOffers(arg messages.Arg, response *[]byte) error {
select {
case answer := <-snowflake.answerChannel:
i.ctx.metrics.lock.Lock()
i.ctx.metrics.UpdateRendezvousStats(arg.RemoteAddr, arg.RendezvousMethod, offer.natType, true)
i.ctx.metrics.UpdateRendezvousStats(arg.RemoteAddr, arg.RendezvousMethod, offer.natType, "matched")
i.ctx.metrics.lock.Unlock()
resp := &messages.ClientPollResponse{Answer: answer}
err = sendClientResponse(resp, response)
@ -218,7 +218,9 @@ func (i *IPC) ClientOffers(arg messages.Arg, response *[]byte) error {
i.ctx.metrics.clientRoundtripEstimate = time.Since(startTime) / time.Millisecond
i.ctx.metrics.lock.Unlock()
case <-time.After(time.Second * ClientTimeout):
log.Println("Client: Timed out.")
i.ctx.metrics.lock.Lock()
i.ctx.metrics.UpdateRendezvousStats(arg.RemoteAddr, arg.RendezvousMethod, offer.natType, "timeout")
i.ctx.metrics.lock.Unlock()
resp := &messages.ClientPollResponse{Error: messages.StrTimedOut}
err = sendClientResponse(resp, response)
}
@ -261,7 +263,6 @@ func (i *IPC) ProxyAnswers(arg messages.Arg, response *[]byte) error {
// The snowflake took too long to respond with an answer, so its client
// disappeared / the snowflake is no longer recognized by the Broker.
success = false
log.Printf("Warning: matching with snowflake client failed")
}
b, err := messages.EncodeAnswerResponse(success)