k8s.io/kubernetes@v1.29.3/test/e2e_node/kubelet_config_dir_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 e2enode 18 19 import ( 20 "context" 21 "os" 22 "path/filepath" 23 "time" 24 25 "github.com/onsi/ginkgo/v2" 26 "github.com/onsi/gomega" 27 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 28 kubeletconfig "k8s.io/kubernetes/pkg/kubelet/apis/config" 29 "k8s.io/kubernetes/test/e2e/framework" 30 "k8s.io/kubernetes/test/e2e/nodefeature" 31 ) 32 33 var _ = SIGDescribe("Kubelet Config", framework.WithSlow(), framework.WithSerial(), framework.WithDisruptive(), nodefeature.KubeletConfigDropInDir, func() { 34 f := framework.NewDefaultFramework("kubelet-config-drop-in-dir-test") 35 ginkgo.Context("when merging drop-in configs", func() { 36 var oldcfg *kubeletconfig.KubeletConfiguration 37 ginkgo.BeforeEach(func(ctx context.Context) { 38 var err error 39 oldcfg, err = getCurrentKubeletConfig(ctx) 40 framework.ExpectNoError(err) 41 }) 42 ginkgo.AfterEach(func(ctx context.Context) { 43 files, err := filepath.Glob(filepath.Join(framework.TestContext.KubeletConfigDropinDir, "*"+".conf")) 44 framework.ExpectNoError(err) 45 for _, file := range files { 46 err := os.Remove(file) 47 framework.ExpectNoError(err) 48 } 49 updateKubeletConfig(ctx, f, oldcfg, true) 50 }) 51 ginkgo.It("should merge kubelet configs correctly", func(ctx context.Context) { 52 // Get the initial kubelet configuration 53 initialConfig, err := getCurrentKubeletConfig(ctx) 54 framework.ExpectNoError(err) 55 56 ginkgo.By("Stopping the kubelet") 57 restartKubelet := stopKubelet() 58 59 // wait until the kubelet health check will fail 60 gomega.Eventually(ctx, func() bool { 61 return kubeletHealthCheck(kubeletHealthCheckURL) 62 }, f.Timeouts.PodStart, f.Timeouts.Poll).Should(gomega.BeFalse()) 63 64 configDir := framework.TestContext.KubeletConfigDropinDir 65 66 contents := []byte(`apiVersion: kubelet.config.k8s.io/v1beta1 67 kind: KubeletConfiguration 68 port: 10255 69 readOnlyPort: 10257 70 clusterDNS: 71 - 192.168.1.10 72 systemReserved: 73 memory: 1Gi`) 74 framework.ExpectNoError(os.WriteFile(filepath.Join(configDir, "10-kubelet.conf"), contents, 0755)) 75 contents = []byte(`apiVersion: kubelet.config.k8s.io/v1beta1 76 kind: KubeletConfiguration 77 clusterDNS: 78 - 192.168.1.1 79 - 192.168.1.5 80 - 192.168.1.8 81 port: 8080 82 cpuManagerReconcilePeriod: 0s 83 systemReserved: 84 memory: 2Gi`) 85 framework.ExpectNoError(os.WriteFile(filepath.Join(configDir, "20-kubelet.conf"), contents, 0755)) 86 ginkgo.By("Restarting the kubelet") 87 restartKubelet() 88 // wait until the kubelet health check will succeed 89 gomega.Eventually(ctx, func() bool { 90 return kubeletHealthCheck(kubeletHealthCheckURL) 91 }, f.Timeouts.PodStart, f.Timeouts.Poll).Should(gomega.BeTrue()) 92 93 mergedConfig, err := getCurrentKubeletConfig(ctx) 94 framework.ExpectNoError(err) 95 96 // Replace specific fields in the initial configuration with expectedConfig values 97 initialConfig.Port = int32(8080) // not overridden by second file, should be retained. 98 initialConfig.ReadOnlyPort = int32(10257) // overridden by second file. 99 initialConfig.SystemReserved = map[string]string{ // overridden by map in second file. 100 "memory": "2Gi", 101 } 102 initialConfig.ClusterDNS = []string{"192.168.1.1", "192.168.1.5", "192.168.1.8"} // overridden by slice in second file. 103 // This value was explicitly set in the drop-in, make sure it is retained 104 initialConfig.CPUManagerReconcilePeriod = metav1.Duration{Duration: time.Duration(0)} 105 // Meanwhile, this value was not explicitly set, but could have been overridden by a "default" of 0 for the type. 106 // Ensure the true default persists. 107 initialConfig.CPUCFSQuotaPeriod = metav1.Duration{Duration: time.Duration(100000000)} 108 // Compare the expected config with the merged config 109 gomega.Expect(initialConfig).To(gomega.BeComparableTo(mergedConfig), "Merged kubelet config does not match the expected configuration.") 110 }) 111 }) 112 113 })