k8s.io/kubernetes@v1.29.3/test/e2e_node/pids_test.go (about) 1 /* 2 Copyright 2019 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 "fmt" 22 23 v1 "k8s.io/api/core/v1" 24 "k8s.io/apimachinery/pkg/api/resource" 25 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 26 "k8s.io/apimachinery/pkg/util/uuid" 27 admissionapi "k8s.io/pod-security-admission/api" 28 29 kubeletconfig "k8s.io/kubernetes/pkg/kubelet/apis/config" 30 "k8s.io/kubernetes/pkg/kubelet/cm" 31 "k8s.io/kubernetes/test/e2e/framework" 32 e2epod "k8s.io/kubernetes/test/e2e/framework/pod" 33 imageutils "k8s.io/kubernetes/test/utils/image" 34 35 "github.com/onsi/ginkgo/v2" 36 ) 37 38 // makePodToVerifyPids returns a pod that verifies specified cgroup with pids 39 func makePodToVerifyPids(baseName string, pidsLimit resource.Quantity) *v1.Pod { 40 // convert the cgroup name to its literal form 41 cgroupFsName := "" 42 cgroupName := cm.NewCgroupName(cm.RootCgroupName, defaultNodeAllocatableCgroup, baseName) 43 if kubeletCfg.CgroupDriver == "systemd" { 44 cgroupFsName = cgroupName.ToSystemd() 45 } else { 46 cgroupFsName = cgroupName.ToCgroupfs() 47 } 48 49 // this command takes the expected value and compares it against the actual value for the pod cgroup pids.max 50 command := "" 51 if IsCgroup2UnifiedMode() { 52 command = fmt.Sprintf("expected=%v; actual=$(cat /tmp/%v/pids.max); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", pidsLimit.Value(), cgroupFsName) 53 } else { 54 command = fmt.Sprintf("expected=%v; actual=$(cat /tmp/pids/%v/pids.max); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", pidsLimit.Value(), cgroupFsName) 55 } 56 57 framework.Logf("Pod to run command: %v", command) 58 pod := &v1.Pod{ 59 ObjectMeta: metav1.ObjectMeta{ 60 Name: "pod" + string(uuid.NewUUID()), 61 }, 62 Spec: v1.PodSpec{ 63 RestartPolicy: v1.RestartPolicyNever, 64 Containers: []v1.Container{ 65 { 66 Image: busyboxImage, 67 Name: "container" + string(uuid.NewUUID()), 68 Command: []string{"sh", "-c", command}, 69 VolumeMounts: []v1.VolumeMount{ 70 { 71 Name: "sysfscgroup", 72 MountPath: "/tmp", 73 }, 74 }, 75 }, 76 }, 77 Volumes: []v1.Volume{ 78 { 79 Name: "sysfscgroup", 80 VolumeSource: v1.VolumeSource{ 81 HostPath: &v1.HostPathVolumeSource{Path: "/sys/fs/cgroup"}, 82 }, 83 }, 84 }, 85 }, 86 } 87 return pod 88 } 89 90 func runPodPidsLimitTests(f *framework.Framework) { 91 ginkgo.It("should set pids.max for Pod", func(ctx context.Context) { 92 ginkgo.By("by creating a G pod") 93 pod := e2epod.NewPodClient(f).Create(ctx, &v1.Pod{ 94 ObjectMeta: metav1.ObjectMeta{ 95 Name: "pod" + string(uuid.NewUUID()), 96 Namespace: f.Namespace.Name, 97 }, 98 Spec: v1.PodSpec{ 99 Containers: []v1.Container{ 100 { 101 Image: imageutils.GetPauseImageName(), 102 Name: "container" + string(uuid.NewUUID()), 103 Resources: v1.ResourceRequirements{ 104 Limits: v1.ResourceList{ 105 v1.ResourceName("cpu"): resource.MustParse("10m"), 106 v1.ResourceName("memory"): resource.MustParse("100Mi"), 107 }, 108 }, 109 }, 110 }, 111 }, 112 }) 113 podUID := string(pod.UID) 114 ginkgo.By("checking if the expected pids settings were applied") 115 verifyPod := makePodToVerifyPids("pod"+podUID, resource.MustParse("1024")) 116 e2epod.NewPodClient(f).Create(ctx, verifyPod) 117 err := e2epod.WaitForPodSuccessInNamespace(ctx, f.ClientSet, verifyPod.Name, f.Namespace.Name) 118 framework.ExpectNoError(err) 119 }) 120 } 121 122 // Serial because the test updates kubelet configuration. 123 var _ = SIGDescribe("PodPidsLimit", framework.WithSerial(), func() { 124 f := framework.NewDefaultFramework("pids-limit-test") 125 f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged 126 ginkgo.Context("With config updated with pids limits", func() { 127 tempSetCurrentKubeletConfig(f, func(ctx context.Context, initialConfig *kubeletconfig.KubeletConfiguration) { 128 initialConfig.PodPidsLimit = int64(1024) 129 }) 130 runPodPidsLimitTests(f) 131 }) 132 })