01c7378531
- The feature is GA so there's no feature gate so it doesn't need any special label now. - The test is not dual-stack-specific, so it shouldn't claim to be. - It asserted node-IP-assigning behavior that is not guaranteed to work on all clouds. (Among other things: that there are no "extra" InternalIPs, and that there are InternalIPs of every supported IP family, rather than there only being ExternalIPs of some families.)
211 lines
6.9 KiB
Go
211 lines
6.9 KiB
Go
/*
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Copyright 2023 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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package e2enode
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import (
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"context"
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"fmt"
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"github.com/onsi/ginkgo/v2"
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"github.com/onsi/gomega"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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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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netutils "k8s.io/utils/net"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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kubefeatures "k8s.io/kubernetes/pkg/features"
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utilnode "k8s.io/kubernetes/pkg/util/node"
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"k8s.io/kubernetes/test/e2e/framework"
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e2enetwork "k8s.io/kubernetes/test/e2e/framework/network"
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e2enode "k8s.io/kubernetes/test/e2e/framework/node"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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e2epodoutput "k8s.io/kubernetes/test/e2e/framework/pod/output"
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e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
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"k8s.io/kubernetes/test/e2e/network/common"
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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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)
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var _ = common.SIGDescribe("Pod Host IPs", framework.WithSerial(), func() {
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f := framework.NewDefaultFramework("host-ips")
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f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
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ginkgo.Context("when creating a Pod", func() {
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ginkgo.It("should add node IPs of all supported families to hostIPs of pod-network pod", func(ctx context.Context) {
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podName := "pod-dualstack-host-ips"
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pod := genPodHostIPs(podName+string(uuid.NewUUID()), false)
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ginkgo.By("submitting the pod to kubernetes")
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podClient := e2epod.NewPodClient(f)
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p := podClient.CreateSync(ctx, pod)
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gomega.Expect(p.Status.HostIP).ShouldNot(gomega.BeEquivalentTo(""))
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gomega.Expect(p.Status.HostIPs).ShouldNot(gomega.BeNil())
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// validate first ip in HostIPs is same as HostIP
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gomega.Expect(p.Status.HostIP).Should(gomega.Equal(p.Status.HostIPs[0].IP))
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if len(p.Status.HostIPs) > 1 {
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// assert 2 host ips belong to different families
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if netutils.IsIPv4String(p.Status.HostIPs[0].IP) == netutils.IsIPv4String(p.Status.HostIPs[1].IP) {
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framework.Failf("both internalIPs %s and %s belong to the same families", p.Status.HostIPs[0].IP, p.Status.HostIPs[1].IP)
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}
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}
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ginkgo.By("comparing pod.Status.HostIPs against node.Status.Addresses")
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hostIPs, err := genHostIPsForNode(ctx, f, p.Spec.NodeName)
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framework.ExpectNoError(err, "failed to fetch node IPs")
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gomega.Expect(p.Status.HostIPs).Should(gomega.Equal(hostIPs))
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ginkgo.By("deleting the pod")
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err = podClient.Delete(ctx, pod.Name, *metav1.NewDeleteOptions(1))
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framework.ExpectNoError(err, "failed to delete pod")
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})
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ginkgo.It("should add node IPs of all supported families to hostIPs of host-network pod", func(ctx context.Context) {
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podName := "pod-dualstack-host-ips"
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pod := genPodHostIPs(podName+string(uuid.NewUUID()), true)
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ginkgo.By("submitting the pod to kubernetes")
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podClient := e2epod.NewPodClient(f)
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p := podClient.CreateSync(ctx, pod)
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gomega.Expect(p.Status.HostIP).ShouldNot(gomega.BeEquivalentTo(""))
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gomega.Expect(p.Status.HostIPs).ShouldNot(gomega.BeNil())
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// validate first ip in HostIPs is same as HostIP
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gomega.Expect(p.Status.HostIP).Should(gomega.Equal(p.Status.HostIPs[0].IP))
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if len(p.Status.HostIPs) > 1 {
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// assert 2 host ips belong to different families
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if netutils.IsIPv4String(p.Status.HostIPs[0].IP) == netutils.IsIPv4String(p.Status.HostIPs[1].IP) {
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framework.Failf("both internalIPs %s and %s belong to the same families", p.Status.HostIPs[0].IP, p.Status.HostIPs[1].IP)
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}
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}
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ginkgo.By("comparing pod.Status.HostIPs against node.Status.Addresses")
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hostIPs, err := genHostIPsForNode(ctx, f, p.Spec.NodeName)
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framework.ExpectNoError(err, "failed to fetch node IPs")
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gomega.Expect(p.Status.HostIPs).Should(gomega.Equal(hostIPs))
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ginkgo.By("deleting the pod")
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err = podClient.Delete(ctx, pod.Name, *metav1.NewDeleteOptions(1))
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framework.ExpectNoError(err, "failed to delete pod")
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})
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ginkgo.It("should provide hostIPs as an env var", func(ctx context.Context) {
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if !utilfeature.DefaultFeatureGate.Enabled(kubefeatures.PodHostIPs) {
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e2eskipper.Skipf("PodHostIPs feature is not enabled")
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}
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "HOST_IPS",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "status.hostIPs",
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},
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},
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},
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}
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expectations := []string{
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fmt.Sprintf("HOST_IPS=%v|%v", e2enetwork.RegexIPv4, e2enetwork.RegexIPv6),
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}
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testDownwardAPI(ctx, f, podName, env, expectations)
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})
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})
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})
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func genPodHostIPs(podName string, hostNetwork bool) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"test": "dualstack-host-ips"},
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},
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Spec: v1.PodSpec{
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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.Agnhost),
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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HostNetwork: hostNetwork,
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},
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}
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}
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func genHostIPsForNode(ctx context.Context, f *framework.Framework, nodeName string) ([]v1.HostIP, error) {
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nodeList, err := e2enode.GetReadySchedulableNodes(ctx, f.ClientSet)
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if err != nil {
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return nil, err
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}
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for _, node := range nodeList.Items {
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if node.Name == nodeName {
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nodeIPs, err := utilnode.GetNodeHostIPs(&node)
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if err != nil {
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return nil, err
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}
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hostIPs := []v1.HostIP{}
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for _, ip := range nodeIPs {
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hostIPs = append(hostIPs, v1.HostIP{IP: ip.String()})
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}
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return hostIPs, nil
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}
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}
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return nil, fmt.Errorf("no such node %q", nodeName)
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}
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func testDownwardAPI(ctx context.Context, f *framework.Framework, podName string, env []v1.EnvVar, expectations []string) {
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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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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "dapi-container",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"sh", "-c", "env"},
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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("250m"),
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v1.ResourceMemory: resource.MustParse("32Mi"),
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},
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Limits: v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("1250m"),
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v1.ResourceMemory: resource.MustParse("64Mi"),
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},
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},
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Env: env,
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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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e2epodoutput.TestContainerOutputRegexp(ctx, f, "downward api env vars", pod, 0, expectations)
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}
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