k8s.io/perf-tests/clusterloader2@v0.0.0-20240304094227-64bdb12da87e/pkg/framework/multiclient.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     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 framework
    18  
    19  import (
    20  	"fmt"
    21  	"sync"
    22  
    23  	"k8s.io/client-go/dynamic"
    24  	clientset "k8s.io/client-go/kubernetes"
    25  	"k8s.io/perf-tests/clusterloader2/pkg/framework/config"
    26  )
    27  
    28  // MultiClientSet is a set of kubernetes clients.
    29  type MultiClientSet struct {
    30  	lock    sync.Mutex
    31  	clients []clientset.Interface
    32  	current int
    33  }
    34  
    35  // NewMultiClientSet creates new MultiClientSet for given kubeconfig and number.
    36  func NewMultiClientSet(kubeconfigPath string, number int) (*MultiClientSet, error) {
    37  	m := MultiClientSet{
    38  		clients: make([]clientset.Interface, number),
    39  	}
    40  	for i := 0; i < number; i++ {
    41  		conf, err := config.PrepareConfig(kubeconfigPath)
    42  		if err != nil {
    43  			return nil, fmt.Errorf("config prepare failed: %v", err)
    44  		}
    45  		if number < 1 {
    46  			return nil, fmt.Errorf("incorrect clients number")
    47  		}
    48  		m.clients[i], err = clientset.NewForConfig(conf)
    49  		if err != nil {
    50  			return nil, fmt.Errorf("creating clientset failed: %v", err)
    51  		}
    52  	}
    53  	return &m, nil
    54  }
    55  
    56  // GetClient return one client instance from the set using round robin.
    57  func (m *MultiClientSet) GetClient() clientset.Interface {
    58  	m.lock.Lock()
    59  	defer m.lock.Unlock()
    60  	m.current = (m.current + 1) % len(m.clients)
    61  	return m.clients[m.current]
    62  }
    63  
    64  // MultiDynamicClient is a set of dynamic client.
    65  type MultiDynamicClient struct {
    66  	lock    sync.Mutex
    67  	clients []dynamic.Interface
    68  	current int
    69  }
    70  
    71  // NewMultiDynamicClient creates new MultiDynamicClient for given kubeconfig and number.
    72  func NewMultiDynamicClient(kubeconfigPath string, number int) (*MultiDynamicClient, error) {
    73  	m := MultiDynamicClient{
    74  		clients: make([]dynamic.Interface, number),
    75  	}
    76  	for i := 0; i < number; i++ {
    77  		conf, err := config.PrepareConfig(kubeconfigPath)
    78  		if err != nil {
    79  			return nil, fmt.Errorf("config prepare failed: %v", err)
    80  		}
    81  		if number < 1 {
    82  			return nil, fmt.Errorf("incorrect clients number")
    83  		}
    84  		m.clients[i], err = dynamic.NewForConfig(conf)
    85  		if err != nil {
    86  			return nil, fmt.Errorf("creating dynamic config failed: %v", err)
    87  		}
    88  	}
    89  	return &m, nil
    90  }
    91  
    92  // GetClient return one client instance from the set using round robin.
    93  func (m *MultiDynamicClient) GetClient() dynamic.Interface {
    94  	m.lock.Lock()
    95  	defer m.lock.Unlock()
    96  	m.current = (m.current + 1) % len(m.clients)
    97  	return m.clients[m.current]
    98  }