CleanupZipkinTracingSetup cleans up the Zipkin tracing setup on the machine.

JSONTrace returns a trace for the given traceID.

SetupZipkinTracing sets up zipkin tracing which involves: 1.

ZipkinPort is port exposed by the Zipkin Pod https://github.com/knative/serving/blob/master/config/monitoring/200-common/100-zipkin.yaml#L25 configures the Zipkin Port on the cluster.

ZipkinTraceEndpoint port-forwarded zipkin endpoint.

ZipkinTraceIDHeader HTTP response header key to be used to store Zipkin Trace ID.

ZipkinTracingEnabled variable indicating if zipkin tracing is enabled.

TimeoutError is an error returned by JSONTrace if it times out before getting the expected number of traces.