util.go

Documentation: k8s.io/kubernetes/test/integration/ipamperf

     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 ipamperf
    18  
    19  import (
    20  	"context"
    21  	"time"
    22  
    23  	"k8s.io/api/core/v1"
    24  	apierrors "k8s.io/apimachinery/pkg/api/errors"
    25  	"k8s.io/apimachinery/pkg/api/resource"
    26  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    27  	clientset "k8s.io/client-go/kubernetes"
    28  	"k8s.io/klog/v2"
    29  )
    30  
    31  const (
    32  	maxCreateRetries = 10
    33  	retryDelay       = 10 * time.Second
    34  )
    35  
    36  var (
    37  	baseNodeTemplate = &v1.Node{
    38  		ObjectMeta: metav1.ObjectMeta{
    39  			GenerateName: "sample-node-",
    40  		},
    41  		Status: v1.NodeStatus{
    42  			Capacity: v1.ResourceList{
    43  				v1.ResourcePods:   *resource.NewQuantity(110, resource.DecimalSI),
    44  				v1.ResourceCPU:    resource.MustParse("4"),
    45  				v1.ResourceMemory: resource.MustParse("32Gi"),
    46  			},
    47  			Phase: v1.NodeRunning,
    48  			Conditions: []v1.NodeCondition{
    49  				{Type: v1.NodeReady, Status: v1.ConditionTrue},
    50  			},
    51  		},
    52  	}
    53  )
    54  
    55  func deleteNodes(clientSet *clientset.Clientset) {
    56  	klog.Info("Deleting nodes")
    57  	noGrace := int64(0)
    58  	if err := clientSet.CoreV1().Nodes().DeleteCollection(context.TODO(), metav1.DeleteOptions{GracePeriodSeconds: &noGrace}, metav1.ListOptions{}); err != nil {
    59  		klog.Errorf("Error deleting node: %v", err)
    60  	}
    61  }
    62  
    63  func createNodes(clientSet *clientset.Clientset, config *Config) error {
    64  	klog.Infof("Creating %d nodes", config.NumNodes)
    65  	for i := 0; i < config.NumNodes; i++ {
    66  		var err error
    67  		for j := 0; j < maxCreateRetries; j++ {
    68  			if _, err = clientSet.CoreV1().Nodes().Create(context.TODO(), baseNodeTemplate, metav1.CreateOptions{}); err != nil && apierrors.IsServerTimeout(err) {
    69  				klog.Infof("Server timeout creating nodes, retrying after %v", retryDelay)
    70  				time.Sleep(retryDelay)
    71  				continue
    72  			}
    73  			break
    74  		}
    75  		if err != nil {
    76  			klog.Errorf("Error creating nodes: %v", err)
    77  			return err
    78  		}
    79  	}
    80  	klog.Infof("%d nodes created", config.NumNodes)
    81  	return nil
    82  }
    83
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