mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-01 18:58:18 +00:00
331 lines
11 KiB
Go
331 lines
11 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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"crypto/tls"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"os"
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"strings"
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"time"
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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/runtime/schema"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/cli-runtime/pkg/printers"
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"k8s.io/kubernetes/pkg/cluster/ports"
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"k8s.io/kubernetes/test/e2e/feature"
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"k8s.io/kubernetes/test/e2e/framework"
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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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apierrors "k8s.io/apimachinery/pkg/api/errors"
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testutils "k8s.io/kubernetes/test/utils"
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)
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var _ = SIGDescribe(feature.StandaloneMode, func() {
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f := framework.NewDefaultFramework("static-pod")
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f.NamespacePodSecurityLevel = admissionapi.LevelBaseline
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ginkgo.Context("when creating a static pod", func() {
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var ns, podPath, staticPodName string
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ginkgo.It("the pod should be running", func(ctx context.Context) {
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ns = f.Namespace.Name
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staticPodName = "static-pod-" + string(uuid.NewUUID())
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podPath = kubeletCfg.StaticPodPath
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err := scheduleStaticPod(podPath, staticPodName, ns, createBasicStaticPodSpec(staticPodName, ns))
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framework.ExpectNoError(err)
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gomega.Eventually(ctx, func(ctx context.Context) error {
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pod, err := getPodFromStandaloneKubelet(ctx, ns, staticPodName)
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if err != nil {
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return fmt.Errorf("error getting pod(%v/%v) from standalone kubelet: %w", ns, staticPodName, err)
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}
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isReady, err := testutils.PodRunningReady(pod)
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if err != nil {
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return fmt.Errorf("error checking if pod (%v/%v) is running ready: %w", ns, staticPodName, err)
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}
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if !isReady {
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return fmt.Errorf("pod (%v/%v) is not running", ns, staticPodName)
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}
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return nil
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}, f.Timeouts.PodStart, time.Second*5).Should(gomega.BeNil())
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})
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ginkgo.It("the pod with the port on host network should be running and can be upgraded when the container name changes", func(ctx context.Context) {
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ns = f.Namespace.Name
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staticPodName = "static-pod-" + string(uuid.NewUUID())
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podPath = kubeletCfg.StaticPodPath
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podSpec := createBasicStaticPodSpec(staticPodName, ns)
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podSpec.Spec.HostNetwork = true
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podSpec.Spec.Containers[0].Ports = []v1.ContainerPort{
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{
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Name: "tcp",
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ContainerPort: 4534,
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Protocol: v1.ProtocolTCP,
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},
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}
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err := scheduleStaticPod(podPath, staticPodName, ns, podSpec)
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framework.ExpectNoError(err)
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gomega.Eventually(ctx, func(ctx context.Context) error {
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pod, err := getPodFromStandaloneKubelet(ctx, ns, staticPodName)
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if err != nil {
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return fmt.Errorf("error getting pod(%v/%v) from standalone kubelet: %w", ns, staticPodName, err)
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}
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isReady, err := testutils.PodRunningReady(pod)
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if err != nil {
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return fmt.Errorf("error checking if pod (%v/%v) is running ready: %w", ns, staticPodName, err)
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}
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if !isReady {
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return fmt.Errorf("pod (%v/%v) is not running", ns, staticPodName)
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}
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return nil
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}, f.Timeouts.PodStart, time.Second*5).Should(gomega.BeNil())
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// Upgrade the pod
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podSpec.Spec.Containers[0].Name = "upgraded"
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err = scheduleStaticPod(podPath, staticPodName, ns, podSpec)
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framework.ExpectNoError(err)
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gomega.Eventually(ctx, func(ctx context.Context) error {
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pod, err := getPodFromStandaloneKubelet(ctx, ns, staticPodName)
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if err != nil {
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return fmt.Errorf("error getting pod(%v/%v) from standalone kubelet: %w", ns, staticPodName, err)
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}
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if pod.Spec.Containers[0].Name != "upgraded" {
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return fmt.Errorf("pod (%v/%v) is not upgraded", ns, staticPodName)
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}
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isReady, err := testutils.PodRunningReady(pod)
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if err != nil {
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return fmt.Errorf("error checking if pod (%v/%v) is running ready: %w", ns, staticPodName, err)
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}
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if !isReady {
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return fmt.Errorf("pod (%v/%v) is not running", ns, staticPodName)
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}
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return nil
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}, f.Timeouts.PodStart, time.Second*5).Should(gomega.BeNil())
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})
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// the test below is not working - pod update fails with the "Predicate NodePorts failed: node(s) didn't have free ports for the requested pod ports"
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// ginkgo.It("the pod with the port on host network should be running and can be upgraded when namespace of a Pod changes", func(ctx context.Context) {
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// ns = f.Namespace.Name
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// staticPodName = "static-pod-" + string(uuid.NewUUID())
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// podPath = kubeletCfg.StaticPodPath
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// podSpec := createBasicStaticPodSpec(staticPodName, ns)
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// podSpec.Spec.HostNetwork = true
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// podSpec.Spec.Containers[0].Ports = []v1.ContainerPort{
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// {
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// Name: "tcp",
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// ContainerPort: 4534,
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// Protocol: v1.ProtocolTCP,
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// },
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// }
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// err := scheduleStaticPod(podPath, staticPodName, ns, podSpec)
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// framework.ExpectNoError(err)
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// gomega.Eventually(ctx, func(ctx context.Context) error {
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// pod, err := getPodFromStandaloneKubelet(ctx, ns, staticPodName)
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// if err != nil {
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// return fmt.Errorf("error getting pod(%v/%v) from standalone kubelet: %w", ns, staticPodName, err)
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// }
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// isReady, err := testutils.PodRunningReady(pod)
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// if err != nil {
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// return fmt.Errorf("error checking if pod (%v/%v) is running ready: %w", ns, staticPodName, err)
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// }
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// if !isReady {
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// return fmt.Errorf("pod (%v/%v) is not running", ns, staticPodName)
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// }
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// return nil
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// }, f.Timeouts.PodStart, time.Second*5).Should(gomega.BeNil())
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// // Upgrade the pod
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// upgradedNs := ns + "-upgraded"
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// podSpec.Namespace = upgradedNs
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// // use old namespace as it uses ns in a file name
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// err = scheduleStaticPod(podPath, staticPodName, ns, podSpec)
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// framework.ExpectNoError(err)
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// gomega.Eventually(ctx, func(ctx context.Context) error {
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// pod, err := getPodFromStandaloneKubelet(ctx, upgradedNs, staticPodName)
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// if err != nil {
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// return fmt.Errorf("error getting pod(%v/%v) from standalone kubelet: %w", upgradedNs, staticPodName, err)
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// }
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// isReady, err := testutils.PodRunningReady(pod)
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// if err != nil {
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// return fmt.Errorf("error checking if pod (%v/%v) is running ready: %w", upgradedNs, staticPodName, err)
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// }
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// if !isReady {
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// return fmt.Errorf("pod (%v/%v) is not running", upgradedNs, staticPodName)
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// }
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// return nil
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// }, f.Timeouts.PodStart, time.Second*5).Should(gomega.BeNil())
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// })
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ginkgo.AfterEach(func(ctx context.Context) {
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ginkgo.By(fmt.Sprintf("delete the static pod (%v/%v)", ns, staticPodName))
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err := deleteStaticPod(podPath, staticPodName, ns)
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framework.ExpectNoError(err)
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ginkgo.By(fmt.Sprintf("wait for pod to disappear (%v/%v)", ns, staticPodName))
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gomega.Eventually(ctx, func(ctx context.Context) error {
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_, err := getPodFromStandaloneKubelet(ctx, ns, staticPodName)
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if apierrors.IsNotFound(err) {
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return nil
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}
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return fmt.Errorf("pod (%v/%v) still exists", ns, staticPodName)
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}).Should(gomega.Succeed())
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})
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})
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})
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func createBasicStaticPodSpec(name, namespace string) *v1.Pod {
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podSpec := &v1.Pod{
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TypeMeta: metav1.TypeMeta{
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Kind: "Pod",
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APIVersion: "v1",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Namespace: namespace,
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},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyAlways,
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Containers: []v1.Container{
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{
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Name: "regular1",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{
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"/bin/sh", "-c", "touch /tmp/healthy; sleep 10000",
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},
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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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v1.ResourceMemory: resource.MustParse("15Mi"),
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},
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Limits: v1.ResourceList{
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v1.ResourceMemory: resource.MustParse("15Mi"),
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},
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},
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ReadinessProbe: &v1.Probe{
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InitialDelaySeconds: 2,
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TimeoutSeconds: 2,
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ProbeHandler: v1.ProbeHandler{
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Exec: &v1.ExecAction{
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Command: []string{"/bin/sh", "-c", "cat /tmp/healthy"},
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},
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},
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},
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},
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},
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},
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}
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return podSpec
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}
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func scheduleStaticPod(dir, name, namespace string, podSpec *v1.Pod) error {
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file := staticPodPath(dir, name, namespace)
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f, err := os.OpenFile(file, os.O_RDWR|os.O_TRUNC|os.O_CREATE, 0666)
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if err != nil {
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return err
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}
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defer f.Close()
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y := printers.YAMLPrinter{}
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y.PrintObj(podSpec, f)
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return nil
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}
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func getPodFromStandaloneKubelet(ctx context.Context, podNamespace string, podName string) (*v1.Pod, error) {
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endpoint := fmt.Sprintf("http://127.0.0.1:%d/pods", ports.KubeletReadOnlyPort)
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// TODO: we do not need TLS and bearer token for this test
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tr := &http.Transport{
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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}
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client := &http.Client{Transport: tr}
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req, err := http.NewRequest("GET", endpoint, nil)
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framework.ExpectNoError(err)
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", framework.TestContext.BearerToken))
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req.Header.Add("Accept", "application/json")
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resp, err := client.Do(req)
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if err != nil {
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framework.Logf("Failed to get /pods: %v", err)
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return nil, err
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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framework.Logf("/pods response status not 200. Response was: %+v", resp)
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return nil, fmt.Errorf("/pods response was not 200: %v", err)
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}
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respBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("/pods response was unable to be read: %v", err)
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}
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pods, err := decodePods(respBody)
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if err != nil {
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return nil, fmt.Errorf("unable to decode /pods: %v", err)
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}
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for _, p := range pods.Items {
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// Static pods has a node name suffix so comparing as substring
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p := p
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if strings.Contains(p.Name, podName) && strings.Contains(p.Namespace, podNamespace) {
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return &p, nil
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}
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}
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return nil, apierrors.NewNotFound(schema.GroupResource{Resource: "pods"}, podName)
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}
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// Decodes the http response from /configz and returns a kubeletconfig.KubeletConfiguration (internal type).
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func decodePods(respBody []byte) (*v1.PodList, error) {
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// This hack because /pods reports the following structure:
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// {"kind":"PodList","apiVersion":"v1","metadata":{},"items":[{"metadata":{"name":"kube-dns-autoscaler-758c4689b9-htpqj","generateName":"kube-dns-autoscaler-758c4689b9-",
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var pods v1.PodList
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err := json.Unmarshal(respBody, &pods)
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if err != nil {
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return nil, err
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}
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return &pods, nil
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}
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