kube_proxy_migration.go 7.8 KB

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  1. /*
  2. Copyright 2017 The Kubernetes Authors.
  3. Licensed under the Apache License, Version 2.0 (the "License");
  4. you may not use this file except in compliance with the License.
  5. You may obtain a copy of the License at
  6. http://www.apache.org/licenses/LICENSE-2.0
  7. Unless required by applicable law or agreed to in writing, software
  8. distributed under the License is distributed on an "AS IS" BASIS,
  9. WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  10. See the License for the specific language governing permissions and
  11. limitations under the License.
  12. */
  13. package upgrades
  14. import (
  15. "context"
  16. "fmt"
  17. "time"
  18. appsv1 "k8s.io/api/apps/v1"
  19. v1 "k8s.io/api/core/v1"
  20. metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  21. "k8s.io/apimachinery/pkg/labels"
  22. "k8s.io/apimachinery/pkg/util/wait"
  23. clientset "k8s.io/client-go/kubernetes"
  24. "k8s.io/kubernetes/test/e2e/framework"
  25. e2enode "k8s.io/kubernetes/test/e2e/framework/node"
  26. "github.com/onsi/ginkgo"
  27. )
  28. const (
  29. defaultTestTimeout = time.Duration(5 * time.Minute)
  30. clusterAddonLabelKey = "k8s-app"
  31. clusterComponentKey = "component"
  32. kubeProxyLabelName = "kube-proxy"
  33. )
  34. // KubeProxyUpgradeTest tests kube-proxy static pods -> DaemonSet upgrade path.
  35. type KubeProxyUpgradeTest struct {
  36. }
  37. // Name returns the tracking name of the test.
  38. func (KubeProxyUpgradeTest) Name() string { return "[sig-network] kube-proxy-upgrade" }
  39. // Setup verifies kube-proxy static pods is running before upgrade.
  40. func (t *KubeProxyUpgradeTest) Setup(f *framework.Framework) {
  41. ginkgo.By("Waiting for kube-proxy static pods running and ready")
  42. err := waitForKubeProxyStaticPodsRunning(f.ClientSet)
  43. framework.ExpectNoError(err)
  44. }
  45. // Test validates if kube-proxy is migrated from static pods to DaemonSet.
  46. func (t *KubeProxyUpgradeTest) Test(f *framework.Framework, done <-chan struct{}, upgrade UpgradeType) {
  47. c := f.ClientSet
  48. // Block until upgrade is done.
  49. ginkgo.By("Waiting for upgrade to finish")
  50. <-done
  51. ginkgo.By("Waiting for kube-proxy static pods disappear")
  52. err := waitForKubeProxyStaticPodsDisappear(c)
  53. framework.ExpectNoError(err)
  54. ginkgo.By("Waiting for kube-proxy DaemonSet running and ready")
  55. err = waitForKubeProxyDaemonSetRunning(c)
  56. framework.ExpectNoError(err)
  57. }
  58. // Teardown does nothing.
  59. func (t *KubeProxyUpgradeTest) Teardown(f *framework.Framework) {
  60. }
  61. // KubeProxyDowngradeTest tests kube-proxy DaemonSet -> static pods downgrade path.
  62. type KubeProxyDowngradeTest struct {
  63. }
  64. // Name returns the tracking name of the test.
  65. func (KubeProxyDowngradeTest) Name() string { return "[sig-network] kube-proxy-downgrade" }
  66. // Setup verifies kube-proxy DaemonSet is running before upgrade.
  67. func (t *KubeProxyDowngradeTest) Setup(f *framework.Framework) {
  68. ginkgo.By("Waiting for kube-proxy DaemonSet running and ready")
  69. err := waitForKubeProxyDaemonSetRunning(f.ClientSet)
  70. framework.ExpectNoError(err)
  71. }
  72. // Test validates if kube-proxy is migrated from DaemonSet to static pods.
  73. func (t *KubeProxyDowngradeTest) Test(f *framework.Framework, done <-chan struct{}, upgrade UpgradeType) {
  74. c := f.ClientSet
  75. // Block until upgrade is done.
  76. ginkgo.By("Waiting for upgrade to finish")
  77. <-done
  78. ginkgo.By("Waiting for kube-proxy DaemonSet disappear")
  79. err := waitForKubeProxyDaemonSetDisappear(c)
  80. framework.ExpectNoError(err)
  81. ginkgo.By("Waiting for kube-proxy static pods running and ready")
  82. err = waitForKubeProxyStaticPodsRunning(c)
  83. framework.ExpectNoError(err)
  84. }
  85. // Teardown does nothing.
  86. func (t *KubeProxyDowngradeTest) Teardown(f *framework.Framework) {
  87. }
  88. func waitForKubeProxyStaticPodsRunning(c clientset.Interface) error {
  89. framework.Logf("Waiting up to %v for kube-proxy static pods running", defaultTestTimeout)
  90. condition := func() (bool, error) {
  91. pods, err := getKubeProxyStaticPods(c)
  92. if err != nil {
  93. framework.Logf("Failed to get kube-proxy static pods: %v", err)
  94. return false, nil
  95. }
  96. nodes, err := e2enode.GetReadySchedulableNodes(c)
  97. if err != nil {
  98. framework.Logf("Failed to get nodes: %v", err)
  99. return false, nil
  100. }
  101. numberSchedulableNodes := len(nodes.Items)
  102. numberkubeProxyPods := 0
  103. for _, pod := range pods.Items {
  104. if pod.Status.Phase == v1.PodRunning {
  105. numberkubeProxyPods = numberkubeProxyPods + 1
  106. }
  107. }
  108. if numberkubeProxyPods != numberSchedulableNodes {
  109. framework.Logf("Expect %v kube-proxy static pods running, got %v running, %v in total", numberSchedulableNodes, numberkubeProxyPods, len(pods.Items))
  110. return false, nil
  111. }
  112. return true, nil
  113. }
  114. if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
  115. return fmt.Errorf("error waiting for kube-proxy static pods running: %v", err)
  116. }
  117. return nil
  118. }
  119. func waitForKubeProxyStaticPodsDisappear(c clientset.Interface) error {
  120. framework.Logf("Waiting up to %v for kube-proxy static pods disappear", defaultTestTimeout)
  121. condition := func() (bool, error) {
  122. pods, err := getKubeProxyStaticPods(c)
  123. if err != nil {
  124. framework.Logf("Failed to get kube-proxy static pods: %v", err)
  125. return false, nil
  126. }
  127. if len(pods.Items) != 0 {
  128. framework.Logf("Expect kube-proxy static pods to disappear, got %v pods", len(pods.Items))
  129. return false, nil
  130. }
  131. return true, nil
  132. }
  133. if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
  134. return fmt.Errorf("error waiting for kube-proxy static pods disappear: %v", err)
  135. }
  136. return nil
  137. }
  138. func waitForKubeProxyDaemonSetRunning(c clientset.Interface) error {
  139. framework.Logf("Waiting up to %v for kube-proxy DaemonSet running", defaultTestTimeout)
  140. condition := func() (bool, error) {
  141. daemonSets, err := getKubeProxyDaemonSet(c)
  142. if err != nil {
  143. framework.Logf("Failed to get kube-proxy DaemonSet: %v", err)
  144. return false, nil
  145. }
  146. if len(daemonSets.Items) != 1 {
  147. framework.Logf("Expect only one kube-proxy DaemonSet, got %v", len(daemonSets.Items))
  148. return false, nil
  149. }
  150. nodes, err := e2enode.GetReadySchedulableNodes(c)
  151. if err != nil {
  152. framework.Logf("Failed to get nodes: %v", err)
  153. return false, nil
  154. }
  155. numberSchedulableNodes := len(nodes.Items)
  156. numberkubeProxyPods := int(daemonSets.Items[0].Status.NumberAvailable)
  157. if numberkubeProxyPods != numberSchedulableNodes {
  158. framework.Logf("Expect %v kube-proxy DaemonSet pods running, got %v", numberSchedulableNodes, numberkubeProxyPods)
  159. return false, nil
  160. }
  161. return true, nil
  162. }
  163. if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
  164. return fmt.Errorf("error waiting for kube-proxy DaemonSet running: %v", err)
  165. }
  166. return nil
  167. }
  168. func waitForKubeProxyDaemonSetDisappear(c clientset.Interface) error {
  169. framework.Logf("Waiting up to %v for kube-proxy DaemonSet disappear", defaultTestTimeout)
  170. condition := func() (bool, error) {
  171. daemonSets, err := getKubeProxyDaemonSet(c)
  172. if err != nil {
  173. framework.Logf("Failed to get kube-proxy DaemonSet: %v", err)
  174. return false, nil
  175. }
  176. if len(daemonSets.Items) != 0 {
  177. framework.Logf("Expect kube-proxy DaemonSet to disappear, got %v DaemonSet", len(daemonSets.Items))
  178. return false, nil
  179. }
  180. return true, nil
  181. }
  182. if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
  183. return fmt.Errorf("error waiting for kube-proxy DaemonSet disappear: %v", err)
  184. }
  185. return nil
  186. }
  187. func getKubeProxyStaticPods(c clientset.Interface) (*v1.PodList, error) {
  188. label := labels.SelectorFromSet(labels.Set(map[string]string{clusterComponentKey: kubeProxyLabelName}))
  189. listOpts := metav1.ListOptions{LabelSelector: label.String()}
  190. return c.CoreV1().Pods(metav1.NamespaceSystem).List(context.TODO(), listOpts)
  191. }
  192. func getKubeProxyDaemonSet(c clientset.Interface) (*appsv1.DaemonSetList, error) {
  193. label := labels.SelectorFromSet(labels.Set(map[string]string{clusterAddonLabelKey: kubeProxyLabelName}))
  194. listOpts := metav1.ListOptions{LabelSelector: label.String()}
  195. return c.AppsV1().DaemonSets(metav1.NamespaceSystem).List(context.TODO(), listOpts)
  196. }