// Copyright 2015 The Prometheus Authors// Licensed under the Apache License, Version 2.0 (the "License");// you may not use this file except in compliance with the License.// You may obtain a copy of the License at//// http://www.apache.org/licenses/LICENSE-2.0//// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License.// A minimal example of how to include Prometheus instrumentation.packagemainimport("flag""log""net/http""github.com/prometheus/client_golang/prometheus/promhttp")varaddr=flag.String("listen-address",":8080","The address to listen on for HTTP requests.")funcmain(){flag.Parse()http.Handle("/metrics",promhttp.Handler())log.Fatal(http.ListenAndServe(*addr,nil))}