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Image versions are already explicitly set in our manifests configuration, so tests should not be setting these values to ensure we're using the same versions across the board.
322 lines
13 KiB
Go
322 lines
13 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/* This test check that SecurityContext parameters specified at the
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* pod or the container level work as intended. These tests cannot be
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* run when the 'SecurityContextDeny' admission controller is not used
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* so they are skipped by default.
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*/
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package node
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import (
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"context"
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"fmt"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/kubernetes/test/e2e/framework"
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e2ekubectl "k8s.io/kubernetes/test/e2e/framework/kubectl"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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e2eoutput "k8s.io/kubernetes/test/e2e/framework/pod/output"
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imageutils "k8s.io/kubernetes/test/utils/image"
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admissionapi "k8s.io/pod-security-admission/api"
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"github.com/onsi/ginkgo/v2"
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"github.com/onsi/gomega"
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)
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func scTestPod(hostIPC bool, hostPID bool) *v1.Pod {
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podName := "security-context-" + string(uuid.NewUUID())
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"name": podName},
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Annotations: map[string]string{},
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},
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Spec: v1.PodSpec{
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HostIPC: hostIPC,
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HostPID: hostPID,
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SecurityContext: &v1.PodSecurityContext{},
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Containers: []v1.Container{
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{
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Name: "test-container",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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return pod
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}
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var _ = SIGDescribe("Security Context", func() {
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f := framework.NewDefaultFramework("security-context")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelPrivileged
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ginkgo.It("should support pod.Spec.SecurityContext.SupplementalGroups [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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pod.Spec.Containers[0].Command = []string{"id", "-G"}
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pod.Spec.SecurityContext.SupplementalGroups = []int64{1234, 5678}
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groups := []string{"1234", "5678"}
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e2eoutput.TestContainerOutput(ctx, f, "pod.Spec.SecurityContext.SupplementalGroups", pod, 0, groups)
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})
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ginkgo.When("if the container's primary UID belongs to some groups in the image [LinuxOnly]", func() {
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ginkgo.It("should add pod.Spec.SecurityContext.SupplementalGroups to them [LinuxOnly] in resultant supplementary groups for the container processes", func(ctx context.Context) {
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uidInImage := int64(1000)
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gidDefinedInImage := int64(50000)
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supplementalGroup := int64(60000)
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agnhost := imageutils.GetConfig(imageutils.Agnhost)
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pod := scTestPod(false, false)
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pod.Spec.Containers[0].Image = agnhost.GetE2EImage()
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pod.Spec.Containers[0].Command = []string{"id", "-G"}
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pod.Spec.SecurityContext.SupplementalGroups = []int64{int64(supplementalGroup)}
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pod.Spec.SecurityContext.RunAsUser = &uidInImage
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// In specified image(agnhost E2E image),
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// - user-defined-in-image(uid=1000) is defined
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// - user-defined-in-image belongs to group-defined-in-image(gid=50000)
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// thus, resultant supplementary group of the container processes should be
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// - 1000: self
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// - 50000: pre-defined groups define in the container image of self(uid=1000)
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// - 60000: SupplementalGroups
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// $ id -G
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// 1000 50000 60000
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e2eoutput.TestContainerOutput(
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ctx,
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f,
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"pod.Spec.SecurityContext.SupplementalGroups with pre-defined-group in the image",
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pod, 0,
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[]string{fmt.Sprintf("%d %d %d", uidInImage, gidDefinedInImage, supplementalGroup)},
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)
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})
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})
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ginkgo.It("should support pod.Spec.SecurityContext.RunAsUser [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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userID := int64(1001)
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pod.Spec.SecurityContext.RunAsUser = &userID
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pod.Spec.Containers[0].Command = []string{"sh", "-c", "id"}
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e2eoutput.TestContainerOutput(ctx, f, "pod.Spec.SecurityContext.RunAsUser", pod, 0, []string{
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fmt.Sprintf("uid=%v", userID),
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fmt.Sprintf("gid=%v", 0),
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})
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})
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/*
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Release: v1.21
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Testname: Security Context, test RunAsGroup at pod level
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Description: Container is created with runAsUser and runAsGroup option by passing uid 1001 and gid 2002 at pod level. Pod MUST be in Succeeded phase.
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[LinuxOnly]: This test is marked as LinuxOnly since Windows does not support running as UID / GID.
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*/
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framework.ConformanceIt("should support pod.Spec.SecurityContext.RunAsUser And pod.Spec.SecurityContext.RunAsGroup [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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userID := int64(1001)
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groupID := int64(2002)
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pod.Spec.SecurityContext.RunAsUser = &userID
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pod.Spec.SecurityContext.RunAsGroup = &groupID
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pod.Spec.Containers[0].Command = []string{"sh", "-c", "id"}
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e2eoutput.TestContainerOutput(ctx, f, "pod.Spec.SecurityContext.RunAsUser", pod, 0, []string{
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fmt.Sprintf("uid=%v", userID),
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fmt.Sprintf("gid=%v", groupID),
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})
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})
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ginkgo.It("should support container.SecurityContext.RunAsUser [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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userID := int64(1001)
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overrideUserID := int64(1002)
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pod.Spec.SecurityContext.RunAsUser = &userID
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pod.Spec.Containers[0].SecurityContext = new(v1.SecurityContext)
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pod.Spec.Containers[0].SecurityContext.RunAsUser = &overrideUserID
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pod.Spec.Containers[0].Command = []string{"sh", "-c", "id"}
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e2eoutput.TestContainerOutput(ctx, f, "pod.Spec.SecurityContext.RunAsUser", pod, 0, []string{
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fmt.Sprintf("uid=%v", overrideUserID),
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fmt.Sprintf("gid=%v", 0),
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})
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})
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/*
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Release: v1.21
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Testname: Security Context, test RunAsGroup at container level
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Description: Container is created with runAsUser and runAsGroup option by passing uid 1001 and gid 2002 at containr level. Pod MUST be in Succeeded phase.
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[LinuxOnly]: This test is marked as LinuxOnly since Windows does not support running as UID / GID.
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*/
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framework.ConformanceIt("should support container.SecurityContext.RunAsUser And container.SecurityContext.RunAsGroup [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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userID := int64(1001)
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groupID := int64(2001)
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overrideUserID := int64(1002)
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overrideGroupID := int64(2002)
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pod.Spec.SecurityContext.RunAsUser = &userID
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pod.Spec.SecurityContext.RunAsGroup = &groupID
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pod.Spec.Containers[0].SecurityContext = new(v1.SecurityContext)
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pod.Spec.Containers[0].SecurityContext.RunAsUser = &overrideUserID
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pod.Spec.Containers[0].SecurityContext.RunAsGroup = &overrideGroupID
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pod.Spec.Containers[0].Command = []string{"sh", "-c", "id"}
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e2eoutput.TestContainerOutput(ctx, f, "pod.Spec.SecurityContext.RunAsUser", pod, 0, []string{
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fmt.Sprintf("uid=%v", overrideUserID),
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fmt.Sprintf("gid=%v", overrideGroupID),
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})
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})
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ginkgo.It("should support volume SELinux relabeling [Flaky] [LinuxOnly]", func(ctx context.Context) {
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testPodSELinuxLabeling(ctx, f, false, false)
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})
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ginkgo.It("should support volume SELinux relabeling when using hostIPC [Flaky] [LinuxOnly]", func(ctx context.Context) {
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testPodSELinuxLabeling(ctx, f, true, false)
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})
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ginkgo.It("should support volume SELinux relabeling when using hostPID [Flaky] [LinuxOnly]", func(ctx context.Context) {
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testPodSELinuxLabeling(ctx, f, false, true)
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})
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ginkgo.It("should support seccomp unconfined on the container [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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pod.Spec.Containers[0].SecurityContext = &v1.SecurityContext{SeccompProfile: &v1.SeccompProfile{Type: v1.SeccompProfileTypeUnconfined}}
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pod.Spec.SecurityContext = &v1.PodSecurityContext{SeccompProfile: &v1.SeccompProfile{Type: v1.SeccompProfileTypeRuntimeDefault}}
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pod.Spec.Containers[0].Command = []string{"grep", "ecc", "/proc/self/status"}
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e2eoutput.TestContainerOutput(ctx, f, "seccomp unconfined container", pod, 0, []string{"0"}) // seccomp disabled
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})
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ginkgo.It("should support seccomp unconfined on the pod [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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pod.Spec.SecurityContext = &v1.PodSecurityContext{SeccompProfile: &v1.SeccompProfile{Type: v1.SeccompProfileTypeUnconfined}}
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pod.Spec.Containers[0].Command = []string{"grep", "ecc", "/proc/self/status"}
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e2eoutput.TestContainerOutput(ctx, f, "seccomp unconfined pod", pod, 0, []string{"0"}) // seccomp disabled
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})
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ginkgo.It("should support seccomp runtime/default [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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pod.Spec.Containers[0].SecurityContext = &v1.SecurityContext{SeccompProfile: &v1.SeccompProfile{Type: v1.SeccompProfileTypeRuntimeDefault}}
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pod.Spec.Containers[0].Command = []string{"grep", "ecc", "/proc/self/status"}
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e2eoutput.TestContainerOutput(ctx, f, "seccomp runtime/default", pod, 0, []string{"2"}) // seccomp filtered
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})
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ginkgo.It("should support seccomp default which is unconfined [LinuxOnly]", func(ctx context.Context) {
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pod := scTestPod(false, false)
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pod.Spec.Containers[0].Command = []string{"grep", "ecc", "/proc/self/status"}
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e2eoutput.TestContainerOutput(ctx, f, "seccomp default unconfined", pod, 0, []string{"0"}) // seccomp disabled
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})
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})
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func testPodSELinuxLabeling(ctx context.Context, f *framework.Framework, hostIPC bool, hostPID bool) {
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// Write and read a file with an empty_dir volume
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// with a pod with the MCS label s0:c0,c1
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pod := scTestPod(hostIPC, hostPID)
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volumeName := "test-volume"
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mountPath := "/mounted_volume"
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pod.Spec.Containers[0].VolumeMounts = []v1.VolumeMount{
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{
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Name: volumeName,
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MountPath: mountPath,
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},
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}
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pod.Spec.Volumes = []v1.Volume{
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{
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Name: volumeName,
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VolumeSource: v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{
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Medium: v1.StorageMediumDefault,
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},
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},
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},
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}
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pod.Spec.SecurityContext.SELinuxOptions = &v1.SELinuxOptions{
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Level: "s0:c0,c1",
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}
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pod.Spec.Containers[0].Command = []string{"sleep", "6000"}
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client := f.ClientSet.CoreV1().Pods(f.Namespace.Name)
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pod, err := client.Create(ctx, pod, metav1.CreateOptions{})
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framework.ExpectNoError(err, "Error creating pod %v", pod)
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framework.ExpectNoError(e2epod.WaitForPodRunningInNamespace(ctx, f.ClientSet, pod))
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testContent := "hello"
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testFilePath := mountPath + "/TEST"
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tk := e2ekubectl.NewTestKubeconfig(framework.TestContext.CertDir, framework.TestContext.Host, framework.TestContext.KubeConfig, framework.TestContext.KubeContext, framework.TestContext.KubectlPath, f.Namespace.Name)
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err = tk.WriteFileViaContainer(pod.Name, pod.Spec.Containers[0].Name, testFilePath, testContent)
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framework.ExpectNoError(err)
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content, err := tk.ReadFileViaContainer(pod.Name, pod.Spec.Containers[0].Name, testFilePath)
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framework.ExpectNoError(err)
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gomega.Expect(content).To(gomega.ContainSubstring(testContent))
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foundPod, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Get(ctx, pod.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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// Confirm that the file can be accessed from a second
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// pod using host_path with the same MCS label
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volumeHostPath := fmt.Sprintf("%s/pods/%s/volumes/kubernetes.io~empty-dir/%s", framework.TestContext.KubeletRootDir, foundPod.UID, volumeName)
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ginkgo.By(fmt.Sprintf("confirming a container with the same label can read the file under --kubelet-root-dir=%s", framework.TestContext.KubeletRootDir))
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pod = scTestPod(hostIPC, hostPID)
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pod.Spec.NodeName = foundPod.Spec.NodeName
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volumeMounts := []v1.VolumeMount{
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{
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Name: volumeName,
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MountPath: mountPath,
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},
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}
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volumes := []v1.Volume{
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{
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Name: volumeName,
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VolumeSource: v1.VolumeSource{
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HostPath: &v1.HostPathVolumeSource{
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Path: volumeHostPath,
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},
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},
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},
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}
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pod.Spec.Containers[0].VolumeMounts = volumeMounts
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pod.Spec.Volumes = volumes
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pod.Spec.Containers[0].Command = []string{"cat", testFilePath}
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pod.Spec.SecurityContext.SELinuxOptions = &v1.SELinuxOptions{
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Level: "s0:c0,c1",
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}
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e2eoutput.TestContainerOutput(ctx, f, "Pod with same MCS label reading test file", pod, 0, []string{testContent})
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// Confirm that the same pod with a different MCS
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// label cannot access the volume
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ginkgo.By("confirming a container with a different MCS label is unable to read the file")
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pod = scTestPod(hostIPC, hostPID)
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pod.Spec.Volumes = volumes
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pod.Spec.Containers[0].VolumeMounts = volumeMounts
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pod.Spec.Containers[0].Command = []string{"sleep", "6000"}
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pod.Spec.SecurityContext.SELinuxOptions = &v1.SELinuxOptions{
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Level: "s0:c2,c3",
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}
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_, err = client.Create(ctx, pod, metav1.CreateOptions{})
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framework.ExpectNoError(err, "Error creating pod %v", pod)
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err = e2epod.WaitForPodNameRunningInNamespace(ctx, f.ClientSet, pod.Name, f.Namespace.Name)
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framework.ExpectNoError(err, "Error waiting for pod to run %v", pod)
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// for this to work, SELinux should be in enforcing mode, so let's check that
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isEnforced, err := tk.ReadFileViaContainer(pod.Name, "test-container", "/sys/fs/selinux/enforce")
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if err == nil && isEnforced == "1" {
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_, err = tk.ReadFileViaContainer(pod.Name, "test-container", testFilePath)
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framework.ExpectError(err, "expecting SELinux to not let the container with different MCS label to read the file")
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}
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}
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