Examples using the experimental stats package

[davinci26]

Hey folks,

I am looking into the metrics registered in

grpc-go/balancer/weightedroundrobin/balancer.go

Line 4 in 0b33bfe

*

and they seem quite useful but I have hard time figuring out how I can use the experimental stats/metrics package to extract them.

Do you have any examples/pointers?

[purnesh42H]

Are you looking for this https://github.com/grpc/grpc-go/blob/master/examples/features/stats_monitoring/README.md ?

[davinci26]

@purnesh42H hmmm I have to look into this a bit more, I dont think this example is the best one because it is not immediately obvious how you can retrieve the values here

grpc-go/balancer/weightedroundrobin/balancer.go

Lines 51 to 58 in b45fc41

	rrFallbackMetric = estats.RegisterInt64Count(estats.MetricDescriptor{
	Name: "grpc.lb.wrr.rr_fallback",
	Description: "EXPERIMENTAL. Number of scheduler updates in which there were not enough endpoints with valid weight, which caused the WRR policy to fall back to RR behavior.",
	Unit: "update",
	Labels: []string{"grpc.target"},
	OptionalLabels: []string{"grpc.lb.locality"},
	Default: false,
	})

for example

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[purnesh42H]

@davinci26 did you try enabling the metrics from opentelemetry API https://github.com/grpc/grpc-go/blob/master/examples/features/opentelemetry/README.md ?

they are are probably be already being exported through opentelemetry

[davinci26]

Our infra doesnt really support opentelemetry so I was looking into how I can export this metrics into a format that is prometheus native. So I ended up seeing how otel is implemented and then create a prom integration based on that.

Basically you need to implement an estats.MetricsRecorder and then: register it as a MetricsRecorder

[github-actions]

This issue is labeled as requiring an update from the reporter, and no update has been received after 6 days. If no update is provided in the next 7 days, this issue will be automatically closed.

[github-actions]

This issue is labeled as requiring an update from the reporter, and no update has been received after 6 days. If no update is provided in the next 7 days, this issue will be automatically closed.