github.com/zhyoulun/cilium@v1.6.12/operator/metrics.go (about)

     1  // Copyright 2019 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"net/http"
    19  
    20  	"github.com/prometheus/client_golang/prometheus"
    21  	"github.com/prometheus/client_golang/prometheus/promhttp"
    22  )
    23  
    24  const metricNamespace = "cilium_operator"
    25  
    26  var registry *prometheus.Registry
    27  
    28  func registerMetrics() {
    29  	registry = prometheus.NewPedanticRegistry()
    30  	registry.MustRegister(prometheus.NewProcessCollector(prometheus.ProcessCollectorOpts{Namespace: metricNamespace}))
    31  	go func() {
    32  		// The Handler function provides a default handler to expose metrics
    33  		// via an HTTP server. "/metrics" is the usual endpoint for that.
    34  		http.Handle("/metrics", promhttp.HandlerFor(registry, promhttp.HandlerOpts{}))
    35  		log.Fatal(http.ListenAndServe(metricsAddress, nil))
    36  	}()
    37  }