feat(app/inbound): http and grpc status code metrics #4313
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in #4298, we introduced a new metrics telemetry layer that can measure and report status codes, in a protocol-agnostic fashion. this commit integrates this status code telemtry into the inbound proxy, so that HTTP and gRPC traffic can be observed. a new family of metrics is introduced to the `InboundMetrics` structure, and the inbound http\* router's metrics layer is accordingly updated to thread this metrics family into an extractor, which is in turn provided to the `NewRecordStatusCode` layer. \* as a note for reviewers, the inbound proxy does not model the http and grpc protocols as distinct concepts in the network stack's type system, unlike the outbound proxy. this means that while target types in the outbound proxy like `Http<()>` are specific to HTTP, the inbound proxy's distinction of HTTP/gRPC is determined by obtaining and inspecting the `PermitVariant`. #### 🔗 related some previous pull requests related to this change: * #4298 * #4180 * #4203 * #4127 * #4119 Signed-off-by: katelyn martin <[email protected]>
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in #4298, we introduced a new metrics telemetry
layer that can measure and report status codes, in a protocol-agnostic
fashion. this commit integrates this status code telemtry into the
inbound proxy, so that HTTP and gRPC traffic can be observed.
a new family of metrics is introduced to the
InboundMetricsstructure,and the inbound http* router's metrics layer is accordingly updated to
thread this metrics family into an extractor, which is in turn provided
to the
NewRecordStatusCodelayer.* as a note for reviewers, the inbound proxy does not model the http and
grpc protocols as distinct concepts in the network stack's type system,
unlike the outbound proxy. this means that while target types in the
outbound proxy like
Http<()>are specific to HTTP, the inbound proxy'sdistinction of HTTP/gRPC is determined by obtaining and inspecting the
PermitVariant.🔗 related
some previous pull requests related to this change:
NewRecordStatusCodemiddleware #4298Permitted<T>target #4119