DefaultConnectionTracer returns a callback that creates a metrics ConnectionTracer.

NewClientConnectionTracerWithRegisterer creates a new connection tracer for a connection dialed on the client side with a given Prometheus registerer.

NewServerConnectionTracerWithRegisterer creates a new connection tracer for a connection accepted on the server side with a given Prometheus registerer.

NewTracer creates a new tracer using the default Prometheus registerer.

NewTracerWithRegisterer creates a new tracer using a given Prometheus registerer.