229 lines
7.8 KiB
Go
229 lines
7.8 KiB
Go
/*
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Copyright 2014 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 e2e
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import (
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"fmt"
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"strings"
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"sync"
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"time"
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"k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/util/intstr"
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"k8s.io/kubernetes/test/e2e/framework"
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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 extinguish(f *framework.Framework, totalNS int, maxAllowedAfterDel int, maxSeconds int) {
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var err error
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By("Creating testing namespaces")
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wg := &sync.WaitGroup{}
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wg.Add(totalNS)
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for n := 0; n < totalNS; n += 1 {
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go func(n int) {
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defer wg.Done()
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defer GinkgoRecover()
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_, err = f.CreateNamespace(fmt.Sprintf("nslifetest-%v", n), nil)
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Expect(err).NotTo(HaveOccurred())
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}(n)
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}
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wg.Wait()
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//Wait 10 seconds, then SEND delete requests for all the namespaces.
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By("Waiting 10 seconds")
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time.Sleep(time.Duration(10 * time.Second))
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deleted, err := framework.DeleteNamespaces(f.ClientSet, []string{"nslifetest"}, nil /* skipFilter */)
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Expect(err).NotTo(HaveOccurred())
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Expect(len(deleted)).To(Equal(totalNS))
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By("Waiting for namespaces to vanish")
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//Now POLL until all namespaces have been eradicated.
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framework.ExpectNoError(wait.Poll(2*time.Second, time.Duration(maxSeconds)*time.Second,
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func() (bool, error) {
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var cnt = 0
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nsList, err := f.ClientSet.Core().Namespaces().List(v1.ListOptions{})
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if err != nil {
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return false, err
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}
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for _, item := range nsList.Items {
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if strings.Contains(item.Name, "nslifetest") {
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cnt++
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}
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}
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if cnt > maxAllowedAfterDel {
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framework.Logf("Remaining namespaces : %v", cnt)
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return false, nil
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}
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return true, nil
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}))
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}
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func ensurePodsAreRemovedWhenNamespaceIsDeleted(f *framework.Framework) {
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var err error
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By("Creating a test namespace")
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namespace, err := f.CreateNamespace("nsdeletetest", nil)
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Expect(err).NotTo(HaveOccurred())
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By("Waiting for a default service account to be provisioned in namespace")
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err = framework.WaitForDefaultServiceAccountInNamespace(f.ClientSet, namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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By("Creating a pod in the namespace")
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pod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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Name: "test-pod",
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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: "nginx",
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Image: framework.GetPauseImageName(f.ClientSet),
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},
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},
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},
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}
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pod, err = f.ClientSet.Core().Pods(namespace.Name).Create(pod)
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Expect(err).NotTo(HaveOccurred())
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By("Waiting for the pod to have running status")
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framework.ExpectNoError(framework.WaitForPodRunningInNamespace(f.ClientSet, pod))
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By("Deleting the namespace")
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err = f.ClientSet.Core().Namespaces().Delete(namespace.Name, nil)
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Expect(err).NotTo(HaveOccurred())
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By("Waiting for the namespace to be removed.")
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maxWaitSeconds := int64(60) + *pod.Spec.TerminationGracePeriodSeconds
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framework.ExpectNoError(wait.Poll(1*time.Second, time.Duration(maxWaitSeconds)*time.Second,
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func() (bool, error) {
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_, err = f.ClientSet.Core().Namespaces().Get(namespace.Name, metav1.GetOptions{})
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if err != nil && errors.IsNotFound(err) {
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return true, nil
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}
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return false, nil
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}))
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By("Verifying there is no pod in the namespace")
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_, err = f.ClientSet.Core().Pods(namespace.Name).Get(pod.Name, metav1.GetOptions{})
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Expect(err).To(HaveOccurred())
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}
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func ensureServicesAreRemovedWhenNamespaceIsDeleted(f *framework.Framework) {
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var err error
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By("Creating a test namespace")
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namespace, err := f.CreateNamespace("nsdeletetest", nil)
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Expect(err).NotTo(HaveOccurred())
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By("Waiting for a default service account to be provisioned in namespace")
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err = framework.WaitForDefaultServiceAccountInNamespace(f.ClientSet, namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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By("Creating a service in the namespace")
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serviceName := "test-service"
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labels := map[string]string{
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"foo": "bar",
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"baz": "blah",
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}
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service := &v1.Service{
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ObjectMeta: v1.ObjectMeta{
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Name: serviceName,
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},
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Spec: v1.ServiceSpec{
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Selector: labels,
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Ports: []v1.ServicePort{{
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Port: 80,
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TargetPort: intstr.FromInt(80),
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}},
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},
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}
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service, err = f.ClientSet.Core().Services(namespace.Name).Create(service)
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Expect(err).NotTo(HaveOccurred())
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By("Deleting the namespace")
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err = f.ClientSet.Core().Namespaces().Delete(namespace.Name, nil)
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Expect(err).NotTo(HaveOccurred())
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By("Waiting for the namespace to be removed.")
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maxWaitSeconds := int64(60)
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framework.ExpectNoError(wait.Poll(1*time.Second, time.Duration(maxWaitSeconds)*time.Second,
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func() (bool, error) {
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_, err = f.ClientSet.Core().Namespaces().Get(namespace.Name, metav1.GetOptions{})
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if err != nil && errors.IsNotFound(err) {
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return true, nil
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}
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return false, nil
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}))
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By("Verifying there is no service in the namespace")
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_, err = f.ClientSet.Core().Services(namespace.Name).Get(service.Name, metav1.GetOptions{})
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Expect(err).To(HaveOccurred())
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}
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// This test must run [Serial] due to the impact of running other parallel
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// tests can have on its performance. Each test that follows the common
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// test framework follows this pattern:
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// 1. Create a Namespace
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// 2. Do work that generates content in that namespace
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// 3. Delete a Namespace
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// Creation of a Namespace is non-trivial since it requires waiting for a
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// ServiceAccount to be generated.
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// Deletion of a Namespace is non-trivial and performance intensive since
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// its an orchestrated process. The controller that handles deletion must
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// query the namespace for all existing content, and then delete each piece
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// of content in turn. As the API surface grows to add more KIND objects
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// that could exist in a Namespace, the number of calls that the namespace
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// controller must orchestrate grows since it must LIST, DELETE (1x1) each
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// KIND.
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// There is work underway to improve this, but it's
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// most likely not going to get significantly better until etcd v3.
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// Going back to this test, this test generates 100 Namespace objects, and then
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// rapidly deletes all of them. This causes the NamespaceController to observe
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// and attempt to process a large number of deletes concurrently. In effect,
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// it's like running 100 traditional e2e tests in parallel. If the namespace
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// controller orchestrating deletes is slowed down deleting another test's
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// content then this test may fail. Since the goal of this test is to soak
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// Namespace creation, and soak Namespace deletion, its not appropriate to
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// further soak the cluster with other parallel Namespace deletion activities
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// that each have a variable amount of content in the associated Namespace.
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// When run in [Serial] this test appears to delete Namespace objects at a
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// rate of approximately 1 per second.
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var _ = framework.KubeDescribe("Namespaces [Serial]", func() {
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f := framework.NewDefaultFramework("namespaces")
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It("should ensure that all pods are removed when a namespace is deleted.",
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func() { ensurePodsAreRemovedWhenNamespaceIsDeleted(f) })
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It("should ensure that all services are removed when a namespace is deleted.",
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func() { ensureServicesAreRemovedWhenNamespaceIsDeleted(f) })
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It("should delete fast enough (90 percent of 100 namespaces in 150 seconds)",
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func() { extinguish(f, 100, 10, 150) })
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// On hold until etcd3; see #7372
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It("should always delete fast (ALL of 100 namespaces in 150 seconds) [Feature:ComprehensiveNamespaceDraining]",
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func() { extinguish(f, 100, 0, 150) })
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})
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