k8s.io/apiserver@v0.31.1/pkg/util/flowcontrol/max_seats_test.go (about) 1 /* 2 Copyright 2023 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 flowcontrol 18 19 import ( 20 "testing" 21 "time" 22 23 flowcontrolv1 "k8s.io/api/flowcontrol/v1" 24 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 25 fqs "k8s.io/apiserver/pkg/util/flowcontrol/fairqueuing/queueset" 26 "k8s.io/apiserver/pkg/util/flowcontrol/fairqueuing/testing/eventclock" 27 "k8s.io/apiserver/pkg/util/flowcontrol/metrics" 28 "k8s.io/client-go/informers" 29 clientsetfake "k8s.io/client-go/kubernetes/fake" 30 "k8s.io/utils/ptr" 31 ) 32 33 // Test_GetMaxSeats tests max seats retrieved from MaxSeatsTracker 34 func Test_GetMaxSeats(t *testing.T) { 35 testcases := []struct { 36 name string 37 nominalCL int 38 handSize int32 39 expectedMaxSeats uint64 40 }{ 41 { 42 name: "nominalCL=5, handSize=6", 43 nominalCL: 5, 44 handSize: 6, 45 expectedMaxSeats: 1, 46 }, 47 { 48 name: "nominalCL=10, handSize=6", 49 nominalCL: 10, 50 handSize: 6, 51 expectedMaxSeats: 1, 52 }, 53 { 54 name: "nominalCL=15, handSize=6", 55 nominalCL: 15, 56 handSize: 6, 57 expectedMaxSeats: 2, 58 }, 59 { 60 name: "nominalCL=20, handSize=6", 61 nominalCL: 20, 62 handSize: 6, 63 expectedMaxSeats: 3, 64 }, 65 { 66 name: "nominalCL=35, handSize=6", 67 nominalCL: 35, 68 handSize: 6, 69 expectedMaxSeats: 5, 70 }, 71 { 72 name: "nominalCL=100, handSize=6", 73 nominalCL: 100, 74 handSize: 6, 75 expectedMaxSeats: 15, 76 }, 77 { 78 name: "nominalCL=200, handSize=6", 79 nominalCL: 200, 80 handSize: 6, 81 expectedMaxSeats: 30, 82 }, 83 { 84 name: "nominalCL=10, handSize=1", 85 nominalCL: 10, 86 handSize: 1, 87 expectedMaxSeats: 2, 88 }, 89 { 90 name: "nominalCL=100, handSize=20", 91 nominalCL: 100, 92 handSize: 20, 93 expectedMaxSeats: 5, 94 }, 95 } 96 97 for _, testcase := range testcases { 98 t.Run(testcase.name, func(t *testing.T) { 99 clientset := clientsetfake.NewSimpleClientset() 100 informerFactory := informers.NewSharedInformerFactory(clientset, time.Second) 101 flowcontrolClient := clientset.FlowcontrolV1() 102 startTime := time.Now() 103 clk, _ := eventclock.NewFake(startTime, 0, nil) 104 c := newTestableController(TestableConfig{ 105 Name: "Controller", 106 Clock: clk, 107 InformerFactory: informerFactory, 108 FlowcontrolClient: flowcontrolClient, 109 // for the purposes of this test, serverCL ~= nominalCL since there is 110 // only 1 PL with large concurrency shares, making mandatory PLs negligible. 111 ServerConcurrencyLimit: testcase.nominalCL, 112 ReqsGaugeVec: metrics.PriorityLevelConcurrencyGaugeVec, 113 ExecSeatsGaugeVec: metrics.PriorityLevelExecutionSeatsGaugeVec, 114 QueueSetFactory: fqs.NewQueueSetFactory(clk), 115 }) 116 117 testPriorityLevel := &flowcontrolv1.PriorityLevelConfiguration{ 118 ObjectMeta: metav1.ObjectMeta{ 119 Name: "test-pl", 120 }, 121 Spec: flowcontrolv1.PriorityLevelConfigurationSpec{ 122 Type: flowcontrolv1.PriorityLevelEnablementLimited, 123 Limited: &flowcontrolv1.LimitedPriorityLevelConfiguration{ 124 NominalConcurrencyShares: ptr.To(int32(10000)), 125 LimitResponse: flowcontrolv1.LimitResponse{ 126 Queuing: &flowcontrolv1.QueuingConfiguration{ 127 HandSize: testcase.handSize, 128 }, 129 }, 130 }, 131 }, 132 } 133 if _, err := c.digestConfigObjects([]*flowcontrolv1.PriorityLevelConfiguration{testPriorityLevel}, nil); err != nil { 134 t.Errorf("unexpected error from digestConfigObjects: %v", err) 135 } 136 maxSeats := c.GetMaxSeats("test-pl") 137 if maxSeats != testcase.expectedMaxSeats { 138 t.Errorf("unexpected max seats, got=%d, want=%d", maxSeats, testcase.expectedMaxSeats) 139 } 140 }) 141 } 142 }