1 // Copyright 2022 The Prometheus Authors 2 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // you may not use this file except in compliance with the License. 4 // You may obtain a copy of the License at 5 // 6 // http://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 //go:build go1.17 15 // +build go1.17 16 17 // A minimal example of how to include Prometheus instrumentation. 18 package main 19 20 import ( 21 "flag" 22 "fmt" 23 "log" 24 "net/http" 25 26 "github.com/prometheus/client_golang/prometheus" 27 "github.com/prometheus/client_golang/prometheus/collectors/version" 28 "github.com/prometheus/client_golang/prometheus/promhttp" 29 ) 30 31 var addr = flag.String("listen-address", ":8080", "The address to listen on for HTTP requests.") 32 33 // Build using ldflags, for example: 34 // go build -ldflags "-X github.com/prometheus/common/version.Version=1.0.0 -X github.com/prometheus/common/version.Branch=abc123" . 35 func main() { 36 flag.Parse() 37 38 // Create a new registry. 39 reg := prometheus.NewRegistry() 40 41 // Register version collector. 42 reg.MustRegister(version.NewCollector("example")) 43 44 // Expose the registered metrics via HTTP. 45 http.Handle("/metrics", promhttp.HandlerFor( 46 reg, 47 promhttp.HandlerOpts{}, 48 )) 49 fmt.Println("Hello world from new Version Collector!") 50 log.Fatal(http.ListenAndServe(*addr, nil)) 51 } 52