Imports github.com/gocql/gocql go.opentelemetry.io/contrib/instrumentation/github.com/gocql/gocql go.opentelemetry.io/otel/api/global go.opentelemetry.io/otel/exporters/metric/prometheus go.opentelemetry.io/otel/exporters/trace/zipkin Standard library imports context fmt log net/http os os/signal sync time