Using Prometheus

$ go get github.com/prometheus/client_golang/prometheus
$ go get github.com/prometheus/client_golang/prometheus/promauto
$ go get github.com/prometheus/client_golang/prometheus/promhttp

Using OpenCensus

The package go.opencensus.io/exporter/stats/prometheus has been replaced with the contrib.go.opencensus.io/exporter/prometheus.

$ go get -u go.opencensus.io/...
$ go get -u contrib.go.opencensus.io/exporter/prometheus

Opentracing

$ go get -u -v contrib.go.opencensus.io/exporter/zipkin
$ go get -u -v github.com/openzipkin/zipkin-go