k8s.io/kubernetes@v1.29.3/test/e2e/common/node/containers.go (about) 1 /* 2 Copyright 2016 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 node 18 19 import ( 20 "context" 21 22 "github.com/onsi/gomega" 23 24 v1 "k8s.io/api/core/v1" 25 "k8s.io/apimachinery/pkg/util/uuid" 26 "k8s.io/kubernetes/test/e2e/framework" 27 e2epod "k8s.io/kubernetes/test/e2e/framework/pod" 28 e2epodoutput "k8s.io/kubernetes/test/e2e/framework/pod/output" 29 admissionapi "k8s.io/pod-security-admission/api" 30 ) 31 32 var _ = SIGDescribe("Containers", func() { 33 f := framework.NewDefaultFramework("containers") 34 f.NamespacePodSecurityLevel = admissionapi.LevelBaseline 35 36 /* 37 Release: v1.9 38 Testname: Containers, without command and arguments 39 Description: Default command and arguments from the container image entrypoint MUST be used when Pod does not specify the container command 40 */ 41 framework.ConformanceIt("should use the image defaults if command and args are blank", f.WithNodeConformance(), func(ctx context.Context) { 42 pod := entrypointTestPod(f.Namespace.Name) 43 pod.Spec.Containers[0].Args = nil 44 pod = e2epod.NewPodClient(f).Create(ctx, pod) 45 err := e2epod.WaitForPodNameRunningInNamespace(ctx, f.ClientSet, pod.Name, f.Namespace.Name) 46 framework.ExpectNoError(err, "Expected pod %q to be running, got error: %v", pod.Name, err) 47 pollLogs := func() (string, error) { 48 return e2epod.GetPodLogs(ctx, f.ClientSet, f.Namespace.Name, pod.Name, pod.Spec.Containers[0].Name) 49 } 50 51 // The agnhost's image default entrypoint / args are: "/agnhost pause" 52 // which will print out "Paused". 53 gomega.Eventually(ctx, pollLogs, 3, framework.Poll).Should(gomega.ContainSubstring("Paused")) 54 }) 55 56 /* 57 Release: v1.9 58 Testname: Containers, with arguments 59 Description: Default command and from the container image entrypoint MUST be used when Pod does not specify the container command but the arguments from Pod spec MUST override when specified. 60 */ 61 framework.ConformanceIt("should be able to override the image's default arguments (container cmd)", f.WithNodeConformance(), func(ctx context.Context) { 62 pod := entrypointTestPod(f.Namespace.Name, "entrypoint-tester", "override", "arguments") 63 e2epodoutput.TestContainerOutput(ctx, f, "override arguments", pod, 0, []string{ 64 "[/agnhost entrypoint-tester override arguments]", 65 }) 66 }) 67 68 // Note: when you override the entrypoint, the image's arguments (container cmd) 69 // are ignored. 70 /* 71 Release: v1.9 72 Testname: Containers, with command 73 Description: Default command from the container image entrypoint MUST NOT be used when Pod specifies the container command. Command from Pod spec MUST override the command in the image. 74 */ 75 framework.ConformanceIt("should be able to override the image's default command (container entrypoint)", f.WithNodeConformance(), func(ctx context.Context) { 76 pod := entrypointTestPod(f.Namespace.Name, "entrypoint-tester") 77 pod.Spec.Containers[0].Command = []string{"/agnhost-2"} 78 79 e2epodoutput.TestContainerOutput(ctx, f, "override command", pod, 0, []string{ 80 "[/agnhost-2 entrypoint-tester]", 81 }) 82 }) 83 84 /* 85 Release: v1.9 86 Testname: Containers, with command and arguments 87 Description: Default command and arguments from the container image entrypoint MUST NOT be used when Pod specifies the container command and arguments. Command and arguments from Pod spec MUST override the command and arguments in the image. 88 */ 89 framework.ConformanceIt("should be able to override the image's default command and arguments", f.WithNodeConformance(), func(ctx context.Context) { 90 pod := entrypointTestPod(f.Namespace.Name, "entrypoint-tester", "override", "arguments") 91 pod.Spec.Containers[0].Command = []string{"/agnhost-2"} 92 93 e2epodoutput.TestContainerOutput(ctx, f, "override all", pod, 0, []string{ 94 "[/agnhost-2 entrypoint-tester override arguments]", 95 }) 96 }) 97 }) 98 99 // Return a prototypical entrypoint test pod 100 func entrypointTestPod(namespace string, entrypointArgs ...string) *v1.Pod { 101 podName := "client-containers-" + string(uuid.NewUUID()) 102 pod := e2epod.NewAgnhostPod(namespace, podName, nil, nil, nil, entrypointArgs...) 103 104 one := int64(1) 105 pod.Spec.TerminationGracePeriodSeconds = &one 106 pod.Spec.RestartPolicy = v1.RestartPolicyNever 107 return pod 108 }