add specific configuration options

Author: dashpole

keps/sig-instrumentation/0034-distributed-tracing-kep.md

@@ -84,7 +84,7 @@ This KEP proposes the use of the [OpenTelemetry tracing framework](https://opent
 
 The API Server will use the [OpenTelemetry exporter format](https://github.com/open-telemetry/opentelemetry-proto), which exports traces to a local port.  This format is compatible with the [OpenTelemetry Collector](https://github.com/open-telemetry/opentelemetry-collector), which allows importing and configuring exporters for trace storage backends to be done out-of-tree in addition to other useful features.  The exporter stores spans in memory, and uses the [batching processor](https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/trace/sdk.md#batching-processor) to batch requests and send them asynchronously.
 
-Add configuration to the API Server required to configure the opentelemetry exporter, including the address and egress proxy to send spans to. The [egress proxy](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/20190226-network-proxy.md) can be added to the opentelemetry exporter by adding a ContextDialer grpc DialOption similar to the one used by the apiserver's etcd client.
+Add configuration to the API Server required to configure the opentelemetry exporter, including the address and egress proxy to send spans to. The [egress proxy](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/20190226-network-proxy.md) can be added to the opentelemetry exporter by adding a ContextDialer grpc DialOption similar to the one used by the apiserver's etcd client.  This will add a new "OpenTelemetry" [EgressType](https://github.com/kubernetes/kubernetes/blob/4b9b9ab75376b7b53876ab6b2be42d0940c7eb26/staging/src/k8s.io/apiserver/pkg/server/egressselector/egress_selector.go#L53) to the API Server's configuration.
 
 ### Controlling use of the OpenTelemetry library
 
@@ -95,15 +95,13 @@ As the community found in the [Metrics Stability Framework KEP](https://github.c
 Alpha
 
 - [] Implement tracing of incoming and outgoing http/grpc requests in the kube-apiserver
-- [] Add a `--trace` flag to kubectl
 - [] E2e testing of apiserver tracing
 - [] User-facing documentation
 
 Beta
 
-- [] Benchmark kubernetes components using tracing
+- [] Tracing 100% of requests does not break scalability tests. 
 - [] Publish documentation on examples of how to use the OT Collector with kubernetes
-- [] Scalability testing
 
 
 ## Alternatives considered