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replicaset.go
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replicaset.go
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/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package e2e_federation
import (
"encoding/json"
"fmt"
"reflect"
"strings"
"time"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
fedclientset "k8s.io/kubernetes/federation/client/clientset_generated/federation_clientset"
fedutil "k8s.io/kubernetes/federation/pkg/federation-controller/util"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
"k8s.io/kubernetes/test/e2e/framework"
fedframework "k8s.io/kubernetes/test/e2e_federation/framework"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/kubernetes/federation/apis/federation"
fedreplicsetcontroller "k8s.io/kubernetes/federation/pkg/federation-controller/replicaset"
)
const (
FederationReplicaSetPrefix = "federation-replicaset-"
)
// Create/delete replicaset api objects
var _ = framework.KubeDescribe("Federated ReplicaSet [Feature:Federation]", func() {
f := fedframework.NewDefaultFederatedFramework("federation-replicaset")
Describe("ReplicaSet objects [NoCluster]", func() {
AfterEach(func() {
fedframework.SkipUnlessFederated(f.ClientSet)
// Delete all replicasets.
nsName := f.FederationNamespace.Name
deleteAllReplicaSetsOrFail(f.FederationClientset, nsName)
})
It("should be created and deleted successfully", func() {
fedframework.SkipUnlessFederated(f.ClientSet)
nsName := f.FederationNamespace.Name
rs := createReplicaSetOrFail(f.FederationClientset, newReplicaSet(nsName, FederationReplicaSetPrefix, 5, nil))
By(fmt.Sprintf("Creation of replicaset %q in namespace %q succeeded. Deleting replicaset.", rs.Name, nsName))
// Cleanup
err := f.FederationClientset.Extensions().ReplicaSets(nsName).Delete(rs.Name, &metav1.DeleteOptions{})
framework.ExpectNoError(err, "Error deleting replicaset %q in namespace %q", rs.Name, rs.Namespace)
By(fmt.Sprintf("Deletion of replicaset %q in namespace %q succeeded.", rs.Name, nsName))
})
})
// e2e cases for federated replicaset controller
Describe("Features", func() {
var (
clusters fedframework.ClusterSlice
)
BeforeEach(func() {
fedframework.SkipUnlessFederated(f.ClientSet)
clusters = f.GetRegisteredClusters()
})
// e2e cases for federated replicaset controller
Describe("CRUD", func() {
var (
rs *v1beta1.ReplicaSet
)
BeforeEach(func() {
nsName := f.FederationNamespace.Name
By(fmt.Sprintf("Creating a new replicaset in namespace %q", nsName))
rs = createAndWaitForReplicasetOrFail(f.FederationClientset, nsName, clusters)
})
AfterEach(func() {
// Delete all replicasets.
nsName := f.FederationNamespace.Name
By(fmt.Sprintf("Deleting replicaset \"%s/%s\"", nsName, rs.Name))
orphanDependents := false
deleteReplicaSetOrFail(f.FederationClientset, nsName, rs.Name, &orphanDependents)
})
It("should create and update matching replicasets in underlying clusters", func() {
nsName := f.FederationNamespace.Name
// As part of the update, we scale the replicaset here.
rs = newReplicaSetWithName(nsName, rs.Name, 15, nil)
updateReplicaSetOrFail(f.FederationClientset, rs)
waitForReplicaSetOrFail(f.FederationClientset, nsName, rs.Name, clusters, nil)
By(fmt.Sprintf("Successfully updated and synced replicaset \"%s/%s\" (%v/%v) to clusters", nsName, rs.Name, rs.Status.Replicas, *rs.Spec.Replicas))
})
It("should be deleted from underlying clusters when OrphanDependents is false", func() {
fedframework.SkipUnlessFederated(f.ClientSet)
nsName := f.FederationNamespace.Name
orphanDependents := false
verifyCascadingDeletionForReplicaSet(f.FederationClientset, clusters, &orphanDependents, nsName, rs.Name)
By(fmt.Sprintf("Verified that replicasets were deleted from underlying clusters"))
})
It("should not be deleted from underlying clusters when OrphanDependents is true", func() {
fedframework.SkipUnlessFederated(f.ClientSet)
nsName := f.FederationNamespace.Name
orphanDependents := true
verifyCascadingDeletionForReplicaSet(f.FederationClientset, clusters, &orphanDependents, nsName, rs.Name)
By(fmt.Sprintf("Verified that replicasets were not deleted from underlying clusters"))
})
It("should not be deleted from underlying clusters when OrphanDependents is nil", func() {
fedframework.SkipUnlessFederated(f.ClientSet)
nsName := f.FederationNamespace.Name
verifyCascadingDeletionForReplicaSet(f.FederationClientset, clusters, nil, nsName, rs.Name)
By(fmt.Sprintf("Verified that replicasets were not deleted from underlying clusters"))
})
})
// e2e cases for federated replicaset controller
Describe("Preferences", func() {
var (
rs *v1beta1.ReplicaSet
)
AfterEach(func() {
// Delete all replicasets.
nsName := f.FederationNamespace.Name
if rs != nil {
orphanDependents := false
By(fmt.Sprintf("Deleting replicaset \"%s/%s\"", nsName, rs.Name))
deleteReplicaSetOrFail(f.FederationClientset, nsName, rs.Name, &orphanDependents)
rs = nil
}
})
It("should create replicasets with weight preference", func() {
pref, replicas, expect := generateFedRSPrefsWithWeight(clusters)
rs = createAndUpdateFedRSWithPref(f.FederationClientset, f.FederationNamespace.Name, clusters, pref, replicas, expect)
})
It("should create replicasets with min replicas preference", func() {
pref, replicas, expect := generateFedRSPrefsWithMin(clusters)
rs = createAndUpdateFedRSWithPref(f.FederationClientset, f.FederationNamespace.Name, clusters, pref, replicas, expect)
})
It("should create replicasets with max replicas preference", func() {
pref, replicas, expect := generateFedRSPrefsWithMax(clusters)
rs = createAndUpdateFedRSWithPref(f.FederationClientset, f.FederationNamespace.Name, clusters, pref, replicas, expect)
})
// test for rebalancing
PIt("should create replicasets and rebalance them", func() {
nsName := f.FederationNamespace.Name
pref1, pref2, replicas, expect1, expect2 := generateFedRSPrefsForRebalancing(clusters)
By("Testing replicaset rebalancing")
framework.Logf("Replicas: %d", replicas)
framework.Logf("Preference 1: %#v", pref1)
framework.Logf("Preference 2: %#v", pref2)
rs = newReplicaSet(nsName, FederationReplicaSetPrefix, replicas, pref1)
rs = createReplicaSetOrFail(f.FederationClientset, rs)
waitForReplicaSetOrFail(f.FederationClientset, nsName, rs.Name, clusters, expect1)
By(fmt.Sprintf("Successfully created and synced replicaset \"%s/%s\" (%v/%v) to clusters", nsName, rs.Name, rs.Status.Replicas, *rs.Spec.Replicas))
rs = newReplicaSetWithName(nsName, rs.Name, replicas, pref2)
updateReplicaSetOrFail(f.FederationClientset, rs)
waitForReplicaSetOrFail(f.FederationClientset, nsName, rs.Name, clusters, expect1)
By(fmt.Sprintf("Successfully updated and synced replicaset \"%s/%s\" (%v/%v) to clusters", nsName, rs.Name, rs.Status.Replicas, *rs.Spec.Replicas))
pref2 = updateFedRSPrefsRebalance(pref2, true)
rs = newReplicaSetWithName(nsName, rs.Name, replicas, pref2)
updateReplicaSetOrFail(f.FederationClientset, rs)
waitForReplicaSetOrFail(f.FederationClientset, nsName, rs.Name, clusters, expect2)
By(fmt.Sprintf("Successfully updated and synced replicaset \"%s/%s\" (%v/%v) to clusters", nsName, rs.Name, rs.Status.Replicas, *rs.Spec.Replicas))
})
})
})
})
func createAndWaitForReplicasetOrFail(clientset *fedclientset.Clientset, nsName string, clusters fedframework.ClusterSlice) *v1beta1.ReplicaSet {
rs := createReplicaSetOrFail(clientset, newReplicaSet(nsName, FederationReplicaSetPrefix, 5, nil))
// Check subclusters if the replicaSet was created there.
By(fmt.Sprintf("Waiting for replica sets %s to be created in all underlying clusters", rs.Name))
err := wait.Poll(5*time.Second, 2*time.Minute, func() (bool, error) {
for _, cluster := range clusters {
_, err := cluster.Extensions().ReplicaSets(nsName).Get(rs.Name, metav1.GetOptions{})
if err != nil && errors.IsNotFound(err) {
return false, nil
}
if err != nil {
return false, err
}
}
return true, nil
})
framework.ExpectNoError(err, "Not all replica sets created")
return rs
}
func createAndUpdateFedRSWithPref(clientset *fedclientset.Clientset, nsName string, clusters fedframework.ClusterSlice, pref *federation.ReplicaAllocationPreferences, replicas int32, expect map[string]int32) *v1beta1.ReplicaSet {
framework.Logf("Replicas: %d, Preference: %#v", replicas, pref)
rs := newReplicaSet(nsName, FederationReplicaSetPrefix, replicas, pref)
rs = createReplicaSetOrFail(clientset, rs)
waitForReplicaSetOrFail(clientset, nsName, rs.Name, clusters, expect)
By(fmt.Sprintf("Successfully created and synced replicaset \"%s/%s\" (%v/%v) to clusters", nsName, rs.Name, rs.Status.Replicas, *rs.Spec.Replicas))
rs = newReplicaSetWithName(nsName, rs.Name, 0, pref)
updateReplicaSetOrFail(clientset, rs)
waitForReplicaSetOrFail(clientset, nsName, rs.Name, clusters, nil)
By(fmt.Sprintf("Successfully updated and synced replicaset \"%s/%s\" (%v/%v) to clusters", nsName, rs.Name, rs.Status.Replicas, *rs.Spec.Replicas))
rs = newReplicaSetWithName(nsName, rs.Name, replicas, pref)
updateReplicaSetOrFail(clientset, rs)
waitForReplicaSetOrFail(clientset, nsName, rs.Name, clusters, expect)
By(fmt.Sprintf("Successfully updated and synced replicaset \"%s/%s\" (%v/%v) to clusters", nsName, rs.Name, rs.Status.Replicas, *rs.Spec.Replicas))
return rs
}
// deleteAllReplicaSetsOrFail deletes all replicasets in the given namespace name.
func deleteAllReplicaSetsOrFail(clientset *fedclientset.Clientset, nsName string) {
replicasetList, err := clientset.Extensions().ReplicaSets(nsName).List(metav1.ListOptions{})
Expect(err).NotTo(HaveOccurred())
orphanDependents := false
for _, replicaset := range replicasetList.Items {
deleteReplicaSetOrFail(clientset, nsName, replicaset.Name, &orphanDependents)
}
}
// verifyCascadingDeletionForReplicaSet verifies that replicaSets are deleted
// from underlying clusters when orphan dependents is false and they are not
// deleted when orphan dependents is true.
func verifyCascadingDeletionForReplicaSet(clientset *fedclientset.Clientset, clusters fedframework.ClusterSlice, orphanDependents *bool, nsName, rsName string) {
By(fmt.Sprintf("Deleting replica set %s", rsName))
deleteReplicaSetOrFail(clientset, nsName, rsName, orphanDependents)
By(fmt.Sprintf("Verifying replica sets %s in underlying clusters", rsName))
errMessages := []string{}
for _, cluster := range clusters {
clusterName := cluster.Name
_, err := cluster.Extensions().ReplicaSets(nsName).Get(rsName, metav1.GetOptions{})
if (orphanDependents == nil || *orphanDependents == true) && errors.IsNotFound(err) {
errMessages = append(errMessages, fmt.Sprintf("unexpected NotFound error for replica set %s in cluster %s, expected replica set to exist", rsName, clusterName))
} else if (orphanDependents != nil && *orphanDependents == false) && (err == nil || !errors.IsNotFound(err)) {
errMessages = append(errMessages, fmt.Sprintf("expected NotFound error for replica set %s in cluster %s, got error: %v", rsName, clusterName, err))
}
}
if len(errMessages) != 0 {
framework.Failf("%s", strings.Join(errMessages, "; "))
}
}
func generateFedRSPrefsWithWeight(clusters fedframework.ClusterSlice) (pref *federation.ReplicaAllocationPreferences, replicas int32, expect map[string]int32) {
By("Generating replicaset preferences with weights")
clusterNames := extractClusterNames(clusters)
pref = &federation.ReplicaAllocationPreferences{
Clusters: map[string]federation.ClusterPreferences{},
}
replicas = 0
expect = map[string]int32{}
for i, clusterName := range clusterNames {
if i != 0 { // do not set weight for cluster[0] thus it should have no replicas scheduled
pref.Clusters[clusterName] = federation.ClusterPreferences{
Weight: int64(i),
}
replicas += int32(i)
expect[clusterName] = int32(i)
}
}
return
}
func generateFedRSPrefsWithMin(clusters fedframework.ClusterSlice) (pref *federation.ReplicaAllocationPreferences, replicas int32, expect map[string]int32) {
By("Generating replicaset preferences with min replicas")
clusterNames := extractClusterNames(clusters)
pref = &federation.ReplicaAllocationPreferences{
Clusters: map[string]federation.ClusterPreferences{
clusterNames[0]: {Weight: 100},
},
}
replicas = 0
expect = map[string]int32{}
for i, clusterName := range clusterNames {
if i != 0 { // do not set weight and minReplicas for cluster[0] thus it should have no replicas scheduled
pref.Clusters[clusterName] = federation.ClusterPreferences{
Weight: int64(1),
MinReplicas: int64(i + 2),
}
replicas += int32(i + 2)
expect[clusterName] = int32(i + 2)
}
}
// the extra replica goes to cluster[0] which has the highest weight
replicas += 1
expect[clusterNames[0]] = 1
return
}
func generateFedRSPrefsWithMax(clusters fedframework.ClusterSlice) (pref *federation.ReplicaAllocationPreferences, replicas int32, expect map[string]int32) {
By("Generating replicaset preferences with max replicas")
clusterNames := extractClusterNames(clusters)
pref = &federation.ReplicaAllocationPreferences{
Clusters: map[string]federation.ClusterPreferences{
clusterNames[0]: {Weight: 1},
},
}
replicas = 0
expect = map[string]int32{}
for i, clusterName := range clusterNames {
if i != 0 { // do not set maxReplicas for cluster[0] thus replicas exceeds the total maxReplicas turned to cluster[0]
maxReplicas := int64(i)
pref.Clusters[clusterName] = federation.ClusterPreferences{
Weight: int64(100),
MaxReplicas: &maxReplicas,
}
replicas += int32(i)
expect[clusterName] = int32(i)
}
}
// extra replicas go to cluster[0] although it has the lowest weight as others hit the MaxReplicas
replicas += 5
expect[clusterNames[0]] = 5
return
}
func updateFedRSPrefsRebalance(pref *federation.ReplicaAllocationPreferences, rebalance bool) *federation.ReplicaAllocationPreferences {
pref.Rebalance = rebalance
return pref
}
func generateFedRSPrefsForRebalancing(clusters fedframework.ClusterSlice) (pref1, pref2 *federation.ReplicaAllocationPreferences, replicas int32, expect1, expect2 map[string]int32) {
By("Generating replicaset for rebalancing")
clusterNames := extractClusterNames(clusters)
replicas = 3
pref1 = &federation.ReplicaAllocationPreferences{
Clusters: map[string]federation.ClusterPreferences{
clusterNames[0]: {Weight: 1},
clusterNames[1]: {Weight: 2},
},
}
expect1 = map[string]int32{
clusterNames[0]: 1,
clusterNames[1]: 2,
}
pref2 = &federation.ReplicaAllocationPreferences{
Clusters: map[string]federation.ClusterPreferences{
clusterNames[0]: {Weight: 2},
clusterNames[1]: {Weight: 1},
},
}
expect2 = map[string]int32{
clusterNames[0]: 2,
clusterNames[1]: 1,
}
return
}
func waitForReplicaSetOrFail(c *fedclientset.Clientset, namespace string, replicaSetName string, clusters fedframework.ClusterSlice, expect map[string]int32) {
err := waitForReplicaSet(c, namespace, replicaSetName, clusters, expect)
framework.ExpectNoError(err, "Failed to verify replica set \"%s/%s\", err: %v", namespace, replicaSetName, err)
}
func waitForReplicaSet(c *fedclientset.Clientset, namespace string, replicaSetName string, clusters fedframework.ClusterSlice, expect map[string]int32) error {
framework.Logf("waitForReplicaSet: %s/%s; clusters: %v; expect: %v", namespace, replicaSetName, clusters, expect)
err := wait.Poll(10*time.Second, fedframework.FederatedDefaultTestTimeout, func() (bool, error) {
frs, err := c.ReplicaSets(namespace).Get(replicaSetName, metav1.GetOptions{})
if err != nil {
return false, err
}
specReplicas, statusReplicas := int32(0), int32(0)
for _, cluster := range clusters {
rs, err := cluster.ReplicaSets(namespace).Get(replicaSetName, metav1.GetOptions{})
if err != nil && !errors.IsNotFound(err) {
framework.Logf("Failed getting replicaset: \"%s/%s/%s\", err: %v", cluster.Name, namespace, replicaSetName, err)
return false, err
}
if errors.IsNotFound(err) {
if expect != nil && expect[cluster.Name] > 0 {
framework.Logf("Replicaset \"%s/%s/%s\" with replica count %d does not exist", cluster.Name, namespace, replicaSetName, expect[cluster.Name])
return false, nil
}
} else {
if !equivalentReplicaSet(frs, rs) {
framework.Logf("Replicaset meta or spec does not match for cluster %q:\n federation: %v\n cluster: %v", cluster.Name, frs, rs)
return false, nil
}
if expect != nil && *rs.Spec.Replicas < expect[cluster.Name] {
framework.Logf("Replicas do not match for \"%s/%s/%s\": expected: >= %v, actual: %v", cluster.Name, namespace, replicaSetName, expect[cluster.Name], *rs.Spec.Replicas)
return false, nil
}
specReplicas += *rs.Spec.Replicas
statusReplicas += rs.Status.Replicas
}
}
if *frs.Spec.Replicas == 0 && frs.Status.Replicas != 0 {
framework.Logf("ReplicaSet \"%s/%s\" with zero replicas should match the status as no overflow happens: expected: 0, actual: %v", namespace, replicaSetName, frs.Status.Replicas)
return false, nil
}
if statusReplicas == frs.Status.Replicas && specReplicas >= *frs.Spec.Replicas {
return true, nil
}
framework.Logf("Replicas do not match, federation replicas: %v/%v, cluster replicas: %v/%v", frs.Status.Replicas, *frs.Spec.Replicas, statusReplicas, specReplicas)
return false, nil
})
return err
}
func equivalentReplicaSet(fedReplicaSet, localReplicaSet *v1beta1.ReplicaSet) bool {
localReplicaSetSpec := localReplicaSet.Spec
localReplicaSetSpec.Replicas = fedReplicaSet.Spec.Replicas
return fedutil.ObjectMetaEquivalent(fedReplicaSet.ObjectMeta, localReplicaSet.ObjectMeta) &&
reflect.DeepEqual(fedReplicaSet.Spec, localReplicaSetSpec)
}
func createReplicaSetOrFail(clientset *fedclientset.Clientset, replicaset *v1beta1.ReplicaSet) *v1beta1.ReplicaSet {
namespace := replicaset.Namespace
if clientset == nil || len(namespace) == 0 {
Fail(fmt.Sprintf("Internal error: invalid parameters passed to createReplicaSetOrFail: clientset: %v, namespace: %v", clientset, namespace))
}
By(fmt.Sprintf("Creating federation replicaset %q in namespace %q", replicaset.Name, namespace))
newRS, err := clientset.Extensions().ReplicaSets(namespace).Create(replicaset)
framework.ExpectNoError(err, "Creating replicaset %q in namespace %q", replicaset.Name, namespace)
By(fmt.Sprintf("Successfully created federation replicaset %q in namespace %q", newRS.Name, namespace))
return newRS
}
func deleteReplicaSetOrFail(clientset *fedclientset.Clientset, nsName string, replicaSetName string, orphanDependents *bool) {
By(fmt.Sprintf("Deleting replica set %q in namespace %q", replicaSetName, nsName))
err := clientset.Extensions().ReplicaSets(nsName).Delete(replicaSetName, &metav1.DeleteOptions{OrphanDependents: orphanDependents})
if err != nil && !errors.IsNotFound(err) {
framework.ExpectNoError(err, "Error deleting replica set %q in namespace %q", replicaSetName, nsName)
}
waitForReplicaSetToBeDeletedOrFail(clientset, nsName, replicaSetName)
}
func updateReplicaSetOrFail(clientset *fedclientset.Clientset, replicaset *v1beta1.ReplicaSet) *v1beta1.ReplicaSet {
namespace := replicaset.Namespace
if clientset == nil || len(namespace) == 0 {
Fail(fmt.Sprintf("Internal error: invalid parameters passed to updateReplicaSetOrFail: clientset: %v, namespace: %v", clientset, namespace))
}
By(fmt.Sprintf("Updating federation replicaset %q in namespace %q", replicaset.Name, namespace))
newRS, err := clientset.ReplicaSets(namespace).Update(replicaset)
framework.ExpectNoError(err, "Updating replicaset %q in namespace %q", replicaset.Name, namespace)
By(fmt.Sprintf("Successfully updated federation replicaset %q in namespace %q", replicaset.Name, namespace))
return newRS
}
func newReplicaSetObj(namespace string, replicas int32, pref *federation.ReplicaAllocationPreferences) *v1beta1.ReplicaSet {
// When the tests are run in parallel, replicasets from different tests can
// collide with each other. Prevent that by creating a unique label and
// label selector for each created replica set.
uuidString := string(uuid.NewUUID())
rsLabel := fmt.Sprintf("myrs-%s", uuidString)
rs := &v1beta1.ReplicaSet{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Annotations: map[string]string{},
},
Spec: v1beta1.ReplicaSetSpec{
Replicas: &replicas,
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{"name": rsLabel},
},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{"name": rsLabel},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "nginx",
Image: "nginx",
},
},
},
},
},
}
if pref != nil {
prefBytes, _ := json.Marshal(pref)
prefString := string(prefBytes)
rs.Annotations[fedreplicsetcontroller.FedReplicaSetPreferencesAnnotation] = prefString
}
return rs
}
func newReplicaSet(namespace string, prefix string, replicas int32, pref *federation.ReplicaAllocationPreferences) *v1beta1.ReplicaSet {
rs := newReplicaSetObj(namespace, replicas, pref)
rs.GenerateName = prefix
return rs
}
func newReplicaSetWithName(namespace string, name string, replicas int32, pref *federation.ReplicaAllocationPreferences) *v1beta1.ReplicaSet {
rs := newReplicaSetObj(namespace, replicas, pref)
rs.Name = name
return rs
}
func extractClusterNames(clusters fedframework.ClusterSlice) []string {
clusterNames := make([]string, 0, len(clusters))
for _, cluster := range clusters {
clusterNames = append(clusterNames, cluster.Name)
}
return clusterNames
}