376 lines
15 KiB
Go
376 lines
15 KiB
Go
/*
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Copyright 2016 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_federation
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import (
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"fmt"
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"os"
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"reflect"
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"strconv"
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"strings"
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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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fedclientset "k8s.io/kubernetes/federation/client/clientset_generated/federation_clientset"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/test/e2e/framework"
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fedframework "k8s.io/kubernetes/test/e2e_federation/framework"
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. "github.com/onsi/ginkgo"
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)
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const (
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FederatedServiceTimeout = 60 * time.Second
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FederatedServiceName = "federated-service"
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FederatedServicePodName = "federated-service-test-pod"
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KubeDNSConfigMapName = "kube-dns"
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KubeDNSConfigMapNamespace = "kube-system"
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)
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var FederatedServiceLabels = map[string]string{
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"foo": "bar",
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}
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var _ = framework.KubeDescribe("[Feature:Federation]", func() {
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f := fedframework.NewDefaultFederatedFramework("federated-service")
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var clusters map[string]*cluster // All clusters, keyed by cluster name
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var federationName string
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var primaryClusterName string // The name of the "primary" cluster
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var _ = Describe("Federated Services", func() {
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BeforeEach(func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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// TODO: Federation API server should be able to answer this.
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if federationName = os.Getenv("FEDERATION_NAME"); federationName == "" {
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federationName = DefaultFederationName
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}
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clusters = map[string]*cluster{}
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primaryClusterName = registerClusters(clusters, UserAgentName, federationName, f)
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})
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AfterEach(func() {
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unregisterClusters(clusters, f)
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})
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Describe("Service creation", func() {
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var (
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service *v1.Service
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nsName string
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)
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BeforeEach(func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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// Placeholder
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})
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AfterEach(func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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if service != nil {
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By(fmt.Sprintf("Deleting service shards and their provider resources in underlying clusters for service %q in namespace %q", service.Name, nsName))
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cleanupServiceShardsAndProviderResources(nsName, service, clusters)
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service = nil
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nsName = ""
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}
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})
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It("should succeed", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName = f.FederationNamespace.Name
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service = createServiceOrFail(f.FederationClientset, nsName, FederatedServiceName)
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By(fmt.Sprintf("Creation of service %q in namespace %q succeeded. Deleting service.", service.Name, nsName))
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// Cleanup
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err := f.FederationClientset.Services(nsName).Delete(service.Name, &metav1.DeleteOptions{})
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framework.ExpectNoError(err, "Error deleting service %q in namespace %q", service.Name, service.Namespace)
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By(fmt.Sprintf("Deletion of service %q in namespace %q succeeded.", service.Name, nsName))
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})
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It("should create matching services in underlying clusters", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName = f.FederationNamespace.Name
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service = createServiceOrFail(f.FederationClientset, nsName, FederatedServiceName)
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defer func() { // Cleanup
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By(fmt.Sprintf("Deleting service %q in namespace %q", service.Name, nsName))
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err := f.FederationClientset.Services(nsName).Delete(service.Name, &metav1.DeleteOptions{})
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framework.ExpectNoError(err, "Error deleting service %q in namespace %q", service.Name, nsName)
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}()
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waitForServiceShardsOrFail(nsName, service, clusters)
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})
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It("should be deleted from underlying clusters when OrphanDependents is false", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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orphanDependents := false
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verifyCascadingDeletionForService(f.FederationClientset, clusters, &orphanDependents, nsName)
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By(fmt.Sprintf("Verified that services were deleted from underlying clusters"))
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})
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It("should not be deleted from underlying clusters when OrphanDependents is true", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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orphanDependents := true
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verifyCascadingDeletionForService(f.FederationClientset, clusters, &orphanDependents, nsName)
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By(fmt.Sprintf("Verified that services were not deleted from underlying clusters"))
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})
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It("should not be deleted from underlying clusters when OrphanDependents is nil", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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verifyCascadingDeletionForService(f.FederationClientset, clusters, nil, nsName)
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By(fmt.Sprintf("Verified that services were not deleted from underlying clusters"))
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})
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})
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var _ = Describe("DNS", func() {
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var (
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service *v1.Service
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serviceShard *v1.Service
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)
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BeforeEach(func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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// Create kube-dns configmap for kube-dns to accept federation queries.
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federationsDomainMap := os.Getenv("FEDERATIONS_DOMAIN_MAP")
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if federationsDomainMap == "" {
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framework.Failf("missing required env var FEDERATIONS_DOMAIN_MAP")
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}
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kubeDNSConfigMap := v1.ConfigMap{
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ObjectMeta: metav1.ObjectMeta{
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Name: KubeDNSConfigMapName,
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Namespace: KubeDNSConfigMapNamespace,
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},
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Data: map[string]string{
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"federations": federationsDomainMap,
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},
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}
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// Create this configmap in all clusters.
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for clusterName, cluster := range clusters {
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By(fmt.Sprintf("Creating kube dns config map in cluster: %s", clusterName))
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_, err := cluster.Clientset.Core().ConfigMaps(KubeDNSConfigMapNamespace).Create(&kubeDNSConfigMap)
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framework.ExpectNoError(err, fmt.Sprintf("Error in creating config map in cluster %s", clusterName))
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}
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createBackendPodsOrFail(clusters, nsName, FederatedServicePodName)
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service = createServiceOrFail(f.FederationClientset, nsName, FederatedServiceName)
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obj, err := api.Scheme.DeepCopy(service)
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// Cloning shouldn't fail. On the off-chance it does, we
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// should shallow copy service to serviceShard before
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// failing. If we don't do this we will never really
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// get a chance to clean up the underlying services
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// when the cloner fails for reasons not in our
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// control. For example, cloner bug. That will cause
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// the resources to leak, which in turn causes the
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// test project to run out of quota and the entire
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// suite starts failing. So we must try as hard as
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// possible to cleanup the underlying services. So
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// if DeepCopy fails, we are going to try with shallow
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// copy as a last resort.
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if err != nil {
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serviceCopy := *service
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serviceShard = &serviceCopy
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framework.ExpectNoError(err, fmt.Sprintf("Error in deep copying service %q", service.Name))
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}
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var ok bool
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serviceShard, ok = obj.(*v1.Service)
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// Same argument as above about using shallow copy
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// as a last resort.
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if !ok {
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serviceCopy := *service
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serviceShard = &serviceCopy
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framework.ExpectNoError(err, fmt.Sprintf("Unexpected service object copied %T", obj))
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}
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waitForServiceShardsOrFail(nsName, serviceShard, clusters)
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})
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AfterEach(func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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deleteBackendPodsOrFail(clusters, nsName)
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if service != nil {
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deleteServiceOrFail(f.FederationClientset, nsName, service.Name, nil)
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service = nil
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} else {
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By("No service to delete. Service is nil")
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}
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if serviceShard != nil {
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By(fmt.Sprintf("Deleting service shards and their provider resources in underlying clusters for service %q in namespace %q", serviceShard.Name, nsName))
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cleanupServiceShardsAndProviderResources(nsName, serviceShard, clusters)
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serviceShard = nil
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} else {
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By("No service shards to delete. `serviceShard` is nil")
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}
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// Delete the kube-dns config map from all clusters.
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for clusterName, cluster := range clusters {
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By(fmt.Sprintf("Deleting kube dns config map from cluster: %s", clusterName))
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err := cluster.Clientset.Core().ConfigMaps(KubeDNSConfigMapNamespace).Delete(KubeDNSConfigMapName, nil)
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framework.ExpectNoError(err, fmt.Sprintf("Error in deleting config map from cluster %s", clusterName))
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}
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})
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It("should be able to discover a federated service", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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svcDNSNames := []string{
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FederatedServiceName,
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fmt.Sprintf("%s.%s", FederatedServiceName, nsName),
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fmt.Sprintf("%s.%s.svc.cluster.local.", FederatedServiceName, nsName),
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fmt.Sprintf("%s.%s.%s", FederatedServiceName, nsName, federationName),
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fmt.Sprintf("%s.%s.%s.svc.cluster.local.", FederatedServiceName, nsName, federationName),
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}
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// TODO(mml): This could be much faster. We can launch all the test
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// pods, perhaps in the BeforeEach, and then just poll until we get
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// successes/failures from them all.
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for i, DNSName := range svcDNSNames {
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discoverService(f, DNSName, true, "federated-service-e2e-discovery-pod-"+strconv.Itoa(i))
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}
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By("Verified that DNS rules are working as expected")
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By("Deleting the service to verify that DNS rules still work")
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err := f.FederationClientset.Services(nsName).Delete(FederatedServiceName, &metav1.DeleteOptions{})
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framework.ExpectNoError(err, "Error deleting service %q in namespace %q", service.Name, service.Namespace)
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// Service is deleted, unset the test block-global service variable.
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service = nil
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for i, DNSName := range svcDNSNames {
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discoverService(f, DNSName, true, "federated-service-e2e-discovery-pod-"+strconv.Itoa(i))
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}
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By("Verified that deleting the service does not affect DNS records")
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})
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Context("non-local federated service", func() {
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BeforeEach(func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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// Delete all the backend pods from the shard which is local to the discovery pod.
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deleteOneBackendPodOrFail(clusters[primaryClusterName])
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})
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It("should be able to discover a non-local federated service", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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svcDNSNames := []string{
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fmt.Sprintf("%s.%s.%s", FederatedServiceName, nsName, federationName),
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fmt.Sprintf("%s.%s.%s.svc.cluster.local.", FederatedServiceName, nsName, federationName),
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}
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for i, name := range svcDNSNames {
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discoverService(f, name, true, "federated-service-e2e-discovery-pod-"+strconv.Itoa(i))
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}
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})
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// TODO(mml): This currently takes 9 minutes. Consider reducing the
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// TTL and/or running the pods in parallel.
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Context("[Slow] missing local service", func() {
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It("should never find DNS entries for a missing local service", func() {
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fedframework.SkipUnlessFederated(f.ClientSet)
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nsName := f.FederationNamespace.Name
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localSvcDNSNames := []string{
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FederatedServiceName,
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fmt.Sprintf("%s.%s", FederatedServiceName, nsName),
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fmt.Sprintf("%s.%s.svc.cluster.local.", FederatedServiceName, nsName),
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}
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for i, name := range localSvcDNSNames {
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discoverService(f, name, false, "federated-service-e2e-discovery-pod-"+strconv.Itoa(i))
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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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// verifyCascadingDeletionForService verifies that services are deleted from
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// underlying clusters when orphan dependents is false and they are not
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// deleted when orphan dependents is true.
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func verifyCascadingDeletionForService(clientset *fedclientset.Clientset, clusters map[string]*cluster, orphanDependents *bool, nsName string) {
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service := createServiceOrFail(clientset, nsName, FederatedServiceName)
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serviceName := service.Name
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// Check subclusters if the service was created there.
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By(fmt.Sprintf("Waiting for service %s to be created in all underlying clusters", serviceName))
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err := wait.Poll(5*time.Second, 2*time.Minute, func() (bool, error) {
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for _, cluster := range clusters {
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_, err := cluster.Core().Services(nsName).Get(serviceName, metav1.GetOptions{})
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if err != nil {
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if !errors.IsNotFound(err) {
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return false, err
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}
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return false, nil
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}
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}
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return true, nil
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})
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framework.ExpectNoError(err, "Not all services created")
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By(fmt.Sprintf("Deleting service %s", serviceName))
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deleteServiceOrFail(clientset, nsName, serviceName, orphanDependents)
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By(fmt.Sprintf("Verifying services %s in underlying clusters", serviceName))
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errMessages := []string{}
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// service should be present in underlying clusters unless orphanDependents is false.
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shouldExist := orphanDependents == nil || *orphanDependents == true
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for clusterName, clusterClientset := range clusters {
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_, err := clusterClientset.Core().Services(nsName).Get(serviceName, metav1.GetOptions{})
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if shouldExist && errors.IsNotFound(err) {
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errMessages = append(errMessages, fmt.Sprintf("unexpected NotFound error for service %s in cluster %s, expected service to exist", serviceName, clusterName))
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} else if !shouldExist && !errors.IsNotFound(err) {
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errMessages = append(errMessages, fmt.Sprintf("expected NotFound error for service %s in cluster %s, got error: %v", serviceName, clusterName, err))
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}
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}
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if len(errMessages) != 0 {
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framework.Failf("%s", strings.Join(errMessages, "; "))
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}
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}
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/*
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equivalent returns true if the two services are equivalent. Fields which are expected to differ between
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federated services and the underlying cluster services (e.g. ClusterIP, LoadBalancerIP etc) are ignored.
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*/
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func equivalent(federationService, clusterService v1.Service) bool {
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// TODO: I think that we need a DeepCopy here to avoid clobbering our parameters.
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clusterService.Spec.ClusterIP = federationService.Spec.ClusterIP
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clusterService.Spec.ExternalIPs = federationService.Spec.ExternalIPs
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clusterService.Spec.DeprecatedPublicIPs = federationService.Spec.DeprecatedPublicIPs
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clusterService.Spec.LoadBalancerIP = federationService.Spec.LoadBalancerIP
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clusterService.Spec.LoadBalancerSourceRanges = federationService.Spec.LoadBalancerSourceRanges
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// N.B. We cannot iterate over the port objects directly, as their values
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// only get copied and our updates will get lost.
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for i := range clusterService.Spec.Ports {
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clusterService.Spec.Ports[i].NodePort = federationService.Spec.Ports[i].NodePort
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}
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return reflect.DeepEqual(clusterService.Spec, federationService.Spec)
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}
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