github.com/deemoprobe/k8s-first-commit@v0.0.0-20230430165612-a541f1982be3/pkg/registry/endpoints.go (about)

     1  /*
     2  Copyright 2014 Google Inc. All rights reserved.
     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  package registry
    17  
    18  import (
    19  	"fmt"
    20  	"log"
    21  
    22  	. "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
    23  )
    24  
    25  func MakeEndpointController(serviceRegistry ServiceRegistry, taskRegistry TaskRegistry) *EndpointController {
    26  	return &EndpointController{
    27  		serviceRegistry: serviceRegistry,
    28  		taskRegistry:    taskRegistry,
    29  	}
    30  }
    31  
    32  type EndpointController struct {
    33  	serviceRegistry ServiceRegistry
    34  	taskRegistry    TaskRegistry
    35  }
    36  
    37  func (e *EndpointController) SyncServiceEndpoints() error {
    38  	services, err := e.serviceRegistry.ListServices()
    39  	if err != nil {
    40  		return err
    41  	}
    42  	var resultErr error
    43  	for _, service := range services.Items {
    44  		tasks, err := e.taskRegistry.ListTasks(&service.Labels)
    45  		if err != nil {
    46  			log.Printf("Error syncing service: %#v, skipping.", service)
    47  			resultErr = err
    48  			continue
    49  		}
    50  		endpoints := make([]string, len(tasks))
    51  		for ix, task := range tasks {
    52  			// TODO: Use port names in the service object, don't just use port #0
    53  			endpoints[ix] = fmt.Sprintf("%s:%d", task.CurrentState.Host, task.DesiredState.Manifest.Containers[0].Ports[0].HostPort)
    54  		}
    55  		err = e.serviceRegistry.UpdateEndpoints(Endpoints{
    56  			Name:      service.ID,
    57  			Endpoints: endpoints,
    58  		})
    59  		if err != nil {
    60  			log.Printf("Error updating endpoints: %#v", err)
    61  			continue
    62  		}
    63  	}
    64  	return resultErr
    65  }