github.com/openebs/node-disk-manager@v1.9.1-0.20230225014141-4531f06ffa1e/pkg/server/server.go (about)

     1  /*
     2  Copyright 2018 The OpenEBS Author
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package server
    18  
    19  import (
    20  	"net/http"
    21  
    22  	"k8s.io/klog/v2"
    23  )
    24  
    25  // Server contains the options to start a simple metrics server along with
    26  // handler for the endpoint
    27  type Server struct {
    28  	ListenPort  string
    29  	MetricsPath string
    30  	Handler     http.Handler
    31  }
    32  
    33  // Start boots up the server that runs on the specified port.
    34  // Returns an error if there is no connection established.
    35  func (s *Server) Start() error {
    36  	http.Handle(s.MetricsPath, s.Handler)
    37  	klog.Info("Starting HTTP server at http://localhost" + s.ListenPort + s.MetricsPath)
    38  	err := http.ListenAndServe(s.ListenPort, nil)
    39  	if err != nil {
    40  		klog.Error("error starting http server :", err)
    41  		return err
    42  	}
    43  	return nil
    44  }