mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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ff5558edc3
Some storage tests deploy DaemonSets which hard-code /var/lib/kubelet as root
directory for kubelet registration and pod directory. There was already a
parameter which allowed specifying the root directory, just with a very
confusing name ("--volume-dir") and matching field name. A --kubelet-root-dir
parameters gets added because this may make it easier to find the parameter,
with the old name preserved as an alias for the same field for backwards
compatibility.
288 lines
11 KiB
Go
288 lines
11 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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imageutils "k8s.io/kubernetes/test/utils/image"
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"github.com/onsi/ginkgo"
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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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ginkgo.It("should support pod.Spec.SecurityContext.SupplementalGroups [LinuxOnly]", func() {
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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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f.TestContainerOutput("pod.Spec.SecurityContext.SupplementalGroups", pod, 0, groups)
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})
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ginkgo.It("should support pod.Spec.SecurityContext.RunAsUser [LinuxOnly]", func() {
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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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f.TestContainerOutput("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() {
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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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f.TestContainerOutput("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() {
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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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f.TestContainerOutput("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() {
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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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f.TestContainerOutput("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() {
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testPodSELinuxLabeling(f, false, false)
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})
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ginkgo.It("should support volume SELinux relabeling when using hostIPC [Flaky] [LinuxOnly]", func() {
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testPodSELinuxLabeling(f, true, false)
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})
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ginkgo.It("should support volume SELinux relabeling when using hostPID [Flaky] [LinuxOnly]", func() {
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testPodSELinuxLabeling(f, false, true)
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})
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ginkgo.It("should support seccomp unconfined on the container [LinuxOnly]", func() {
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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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f.TestContainerOutput(v1.SeccompPodAnnotationKey, 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() {
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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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f.TestContainerOutput(v1.SeccompPodAnnotationKey, pod, 0, []string{"0"}) // seccomp disabled
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})
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ginkgo.It("should support seccomp runtime/default [LinuxOnly]", func() {
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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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f.TestContainerOutput(v1.SeccompPodAnnotationKey, 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() {
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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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f.TestContainerOutput(v1.SeccompPodAnnotationKey, pod, 0, []string{"0"}) // seccomp disabled
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})
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})
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func testPodSELinuxLabeling(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(context.TODO(), pod, metav1.CreateOptions{})
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framework.ExpectNoError(err, "Error creating pod %v", pod)
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framework.ExpectNoError(e2epod.WaitForPodRunningInNamespace(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(context.TODO(), 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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f.TestContainerOutput("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(context.TODO(), pod, metav1.CreateOptions{})
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framework.ExpectNoError(err, "Error creating pod %v", pod)
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err = e2epod.WaitForPodNameRunningInNamespace(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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