forked from kubevirt/kubevirt
/
workload-updater_test.go
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workload-updater_test.go
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package workloadupdater
import (
"fmt"
"time"
"github.com/golang/mock/gomock"
k8sv1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/kubernetes/fake"
"k8s.io/client-go/testing"
"k8s.io/client-go/tools/cache"
framework "k8s.io/client-go/tools/cache/testing"
"k8s.io/client-go/tools/record"
"kubevirt.io/client-go/api"
v1 "kubevirt.io/api/core/v1"
"kubevirt.io/client-go/kubecli"
virtcontroller "kubevirt.io/kubevirt/pkg/controller"
metrics "kubevirt.io/kubevirt/pkg/monitoring/metrics/virt-controller"
"kubevirt.io/kubevirt/pkg/testutils"
virtconfig "kubevirt.io/kubevirt/pkg/virt-config"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("Workload Updater", func() {
var ctrl *gomock.Controller
var stop chan struct{}
var virtClient *kubecli.MockKubevirtClient
var migrationInterface *kubecli.MockVirtualMachineInstanceMigrationInterface
var kubeVirtInterface *kubecli.MockKubeVirtInterface
var vmiInterface *kubecli.MockVirtualMachineInstanceInterface
var vmiSource *framework.FakeControllerSource
var vmiInformer cache.SharedIndexInformer
var podInformer cache.SharedIndexInformer
var podSource *framework.FakeControllerSource
var migrationInformer cache.SharedIndexInformer
var migrationSource *framework.FakeControllerSource
var kubeVirtSource *framework.FakeControllerSource
var kubeVirtInformer cache.SharedIndexInformer
var recorder *record.FakeRecorder
var mockQueue *testutils.MockWorkQueue
var kubeClient *fake.Clientset
var migrationFeeder *testutils.MigrationFeeder
var controller *WorkloadUpdateController
var expectedImage string
syncCaches := func(stop chan struct{}) {
go vmiInformer.Run(stop)
go podInformer.Run(stop)
go migrationInformer.Run(stop)
go kubeVirtInformer.Run(stop)
Expect(cache.WaitForCacheSync(stop,
vmiInformer.HasSynced,
migrationInformer.HasSynced,
kubeVirtInformer.HasSynced,
)).To(BeTrue())
}
addKubeVirt := func(kv *v1.KubeVirt) {
mockQueue.ExpectAdds(1)
kubeVirtSource.Add(kv)
mockQueue.Wait()
}
shouldExpectMultiplePodEvictions := func(evictionCount *int) {
// Expect pod deletion
kubeClient.Fake.PrependReactor("create", "pods", func(action testing.Action) (handled bool, ret runtime.Object, err error) {
if action.GetSubresource() == "eviction" {
*evictionCount++
return true, nil, nil
}
return false, nil, nil
})
}
BeforeEach(func() {
expectedImage = "cur-image"
err := metrics.SetupMetrics(nil, nil, nil, nil, nil, nil, nil, nil)
Expect(err).ToNot(HaveOccurred())
metrics.SetOutdatedVirtualMachineInstanceWorkloads(0)
stop = make(chan struct{})
ctrl = gomock.NewController(GinkgoT())
virtClient = kubecli.NewMockKubevirtClient(ctrl)
migrationInterface = kubecli.NewMockVirtualMachineInstanceMigrationInterface(ctrl)
kubeVirtInterface = kubecli.NewMockKubeVirtInterface(ctrl)
vmiInterface = kubecli.NewMockVirtualMachineInstanceInterface(ctrl)
vmiInformer, vmiSource = testutils.NewFakeInformerWithIndexersFor(&v1.VirtualMachineInstance{}, cache.Indexers{
cache.NamespaceIndex: cache.MetaNamespaceIndexFunc,
"node": func(obj interface{}) (strings []string, e error) {
return []string{obj.(*v1.VirtualMachineInstance).Status.NodeName}, nil
},
})
migrationInformer, migrationSource = testutils.NewFakeInformerFor(&v1.VirtualMachineInstanceMigration{})
podInformer, podSource = testutils.NewFakeInformerFor(&k8sv1.Pod{})
recorder = record.NewFakeRecorder(200)
recorder.IncludeObject = true
config, _, _ := testutils.NewFakeClusterConfigUsingKVConfig(&v1.KubeVirtConfiguration{})
kubeVirtInformer, _ = testutils.NewFakeInformerFor(&v1.KubeVirt{})
kubeVirtInformer, kubeVirtSource = testutils.NewFakeInformerFor(&v1.KubeVirt{})
controller, _ = NewWorkloadUpdateController(expectedImage, vmiInformer, podInformer, migrationInformer, kubeVirtInformer, recorder, virtClient, config)
mockQueue = testutils.NewMockWorkQueue(controller.queue)
controller.queue = mockQueue
migrationFeeder = testutils.NewMigrationFeeder(mockQueue, migrationSource)
// Set up mock client
virtClient.EXPECT().VirtualMachineInstanceMigration(k8sv1.NamespaceDefault).Return(migrationInterface).AnyTimes()
virtClient.EXPECT().VirtualMachineInstance(k8sv1.NamespaceDefault).Return(vmiInterface).AnyTimes()
virtClient.EXPECT().KubeVirt(k8sv1.NamespaceDefault).Return(kubeVirtInterface).AnyTimes()
kubeClient = fake.NewSimpleClientset()
virtClient.EXPECT().CoreV1().Return(kubeClient.CoreV1()).AnyTimes()
virtClient.EXPECT().PolicyV1().Return(kubeClient.PolicyV1()).AnyTimes()
// Make sure that all unexpected calls to kubeClient will fail
kubeClient.Fake.PrependReactor("*", "*", func(action testing.Action) (handled bool, obj runtime.Object, err error) {
Expect(action).To(BeNil())
return true, nil, nil
})
syncCaches(stop)
})
Context("workload update in progress", func() {
It("should migrate the VMI", func() {
newVirtualMachine("testvm", true, "madeup", vmiSource, podSource)
waitForNumberOfInstancesOnVMIInformerCache(controller, 1)
kv := newKubeVirt(1)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodLiveMigrate, v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
migrationInterface.EXPECT().Create(gomock.Any(), &metav1.CreateOptions{}).Return(&v1.VirtualMachineInstanceMigration{ObjectMeta: metav1.ObjectMeta{Name: "something"}}, nil)
controller.Execute()
testutils.ExpectEvent(recorder, SuccessfulCreateVirtualMachineInstanceMigrationReason)
})
It("should do nothing if deployment is updating", func() {
newVirtualMachine("testvm", true, "madeup", vmiSource, podSource)
waitForNumberOfInstancesOnVMIInformerCache(controller, 1)
kv := newKubeVirt(1)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodLiveMigrate, v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
kv.Status.ObservedDeploymentID = "something new"
controller.Execute()
Expect(recorder.Events).To(BeEmpty())
})
It("should update out of date value on kv and report prometheus metric", func() {
By("Checking prometheus metric before sync")
value, err := metrics.GetOutdatedVirtualMachineInstanceWorkloads()
Expect(err).ToNot(HaveOccurred())
Expect(value).To(BeZero(), "outdated vmi workload reported should be equal to zero")
totalVMs := 0
reasons := []string{}
for i := 0; i < 50; i++ {
newVirtualMachine(fmt.Sprintf("testvm-migratable-%d", i), true, "madeup", vmiSource, podSource)
totalVMs++
}
for i := 0; i < 50; i++ {
newVirtualMachine(fmt.Sprintf("testvm-non-migratable-%d", i), false, "madeup", vmiSource, podSource)
totalVMs++
}
// add vmis that are not outdated to ensure they are not counted as outdated in count
for i := 0; i < 100; i++ {
newVirtualMachine(fmt.Sprintf("testvm-up-to-date-%d", i), false, expectedImage, vmiSource, podSource)
totalVMs++
}
for i := 0; i < int(virtconfig.ParallelMigrationsPerClusterDefault); i++ {
reasons = append(reasons, SuccessfulCreateVirtualMachineInstanceMigrationReason)
}
for i := 0; i < defaultBatchDeletionCount; i++ {
reasons = append(reasons, SuccessfulEvictVirtualMachineInstanceReason)
}
waitForNumberOfInstancesOnVMIInformerCache(controller, totalVMs)
kv := newKubeVirt(0)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodLiveMigrate, v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
kubeVirtInterface.EXPECT().PatchStatus(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Do(func(name string, pt types.PatchType, data []byte, patchOptions *metav1.PatchOptions) {
str := string(data)
Expect(str).To(Equal("[{ \"op\": \"test\", \"path\": \"/status/outdatedVirtualMachineInstanceWorkloads\", \"value\": 0}, { \"op\": \"replace\", \"path\": \"/status/outdatedVirtualMachineInstanceWorkloads\", \"value\": 100}]"))
}).Return(nil, nil).Times(1)
migrationInterface.EXPECT().Create(gomock.Any(), &metav1.CreateOptions{}).Return(&v1.VirtualMachineInstanceMigration{ObjectMeta: metav1.ObjectMeta{Name: "something"}}, nil).Times(int(virtconfig.ParallelMigrationsPerClusterDefault))
evictionCount := 0
shouldExpectMultiplePodEvictions(&evictionCount)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
By("Checking prometheus metric")
value, err = metrics.GetOutdatedVirtualMachineInstanceWorkloads()
Expect(err).ToNot(HaveOccurred())
Expect(value).To(Equal(100))
Expect(evictionCount).To(Equal(defaultBatchDeletionCount))
})
It("should migrate VMIs up to the global max migration count and delete up to delete batch count", func() {
totalVMs := 0
reasons := []string{}
for i := 0; i < 50; i++ {
newVirtualMachine(fmt.Sprintf("testvm-migratable-%d", i), true, "madeup", vmiSource, podSource)
totalVMs++
}
for i := 0; i < 50; i++ {
newVirtualMachine(fmt.Sprintf("testvm-%d", i), false, "madeup", vmiSource, podSource)
totalVMs++
}
for i := 0; i < int(virtconfig.ParallelMigrationsPerClusterDefault); i++ {
reasons = append(reasons, SuccessfulCreateVirtualMachineInstanceMigrationReason)
}
for i := 0; i < defaultBatchDeletionCount; i++ {
reasons = append(reasons, SuccessfulEvictVirtualMachineInstanceReason)
}
waitForNumberOfInstancesOnVMIInformerCache(controller, totalVMs)
kv := newKubeVirt(totalVMs)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodLiveMigrate, v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
migrationInterface.EXPECT().Create(gomock.Any(), &metav1.CreateOptions{}).Return(&v1.VirtualMachineInstanceMigration{ObjectMeta: metav1.ObjectMeta{Name: "something"}}, nil).Times(int(virtconfig.ParallelMigrationsPerClusterDefault))
evictionCount := 0
shouldExpectMultiplePodEvictions(&evictionCount)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
Expect(evictionCount).To(Equal(defaultBatchDeletionCount))
})
It("should detect in-flight migrations when only migrate VMIs up to the global max migration count", func() {
const desiredNumberOfVMs = 50
const vmsPendingMigration = int(virtconfig.ParallelMigrationsPerClusterDefault)
kv := newKubeVirt(desiredNumberOfVMs)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodLiveMigrate, v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
By("populating with pending migrations that should be ignored while counting the threshold")
for i := 0; i < vmsPendingMigration; i++ {
migrationFeeder.Add(newMigration(fmt.Sprintf("vmim-pending-%d", i), fmt.Sprintf("testvm-migratable-pending-%d", i), v1.MigrationPending))
}
reasons := []string{}
for i := 0; i < desiredNumberOfVMs; i++ {
vmi := newVirtualMachine(fmt.Sprintf("testvm-migratable-%d", i), true, "madeup", vmiSource, podSource)
// create enough migrations to only allow one more active one to be created
if i < int(virtconfig.ParallelMigrationsPerClusterDefault)-1 {
migrationFeeder.Add(newMigration(fmt.Sprintf("vmim-%d", i), vmi.Name, v1.MigrationRunning))
} else if i < int(virtconfig.ParallelMigrationsPerClusterDefault) {
migrationFeeder.Add(newMigration(fmt.Sprintf("vmim-%d", i), vmi.Name, v1.MigrationSucceeded))
// expect only a single migration to occur due to global limit
reasons = append(reasons, SuccessfulCreateVirtualMachineInstanceMigrationReason)
} else {
migrationFeeder.Add(newMigration(fmt.Sprintf("vmim-%d", i), vmi.Name, v1.MigrationSucceeded))
}
}
waitForNumberOfInstancesOnVMIInformerCache(controller, desiredNumberOfVMs)
migrationInterface.EXPECT().Create(gomock.Any(), &metav1.CreateOptions{}).Return(&v1.VirtualMachineInstanceMigration{ObjectMeta: metav1.ObjectMeta{Name: "something"}}, nil).Times(1)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
})
It("should migrate/shutdown outdated VMIs and leave up to date VMIs alone", func() {
reasons := []string{}
newVirtualMachine("testvm-outdated-migratable", true, "madeup", vmiSource, podSource)
reasons = append(reasons, SuccessfulCreateVirtualMachineInstanceMigrationReason)
newVirtualMachine("testvm-outdated-non-migratable", false, "madeup", vmiSource, podSource)
reasons = append(reasons, SuccessfulEvictVirtualMachineInstanceReason)
totalVMs := 2
for i := 0; i < 50; i++ {
newVirtualMachine(fmt.Sprintf("testvm-up-to-date-migratable-%d", i), true, expectedImage, vmiSource, podSource)
newVirtualMachine(fmt.Sprintf("testvm-up-to-date-non-migratable-%d", i), false, expectedImage, vmiSource, podSource)
totalVMs += 2
}
waitForNumberOfInstancesOnVMIInformerCache(controller, totalVMs)
kv := newKubeVirt(2)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodLiveMigrate, v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
migrationInterface.EXPECT().Create(gomock.Any(), &metav1.CreateOptions{}).Return(&v1.VirtualMachineInstanceMigration{ObjectMeta: metav1.ObjectMeta{Name: "something"}}, nil).Times(1)
evictionCount := 0
shouldExpectMultiplePodEvictions(&evictionCount)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
Expect(evictionCount).To(Equal(1))
})
It("should do nothing if no method is set", func() {
totalVMs := 0
for i := 0; i < 50; i++ {
newVirtualMachine(fmt.Sprintf("testvm-migratable-%d", i), true, "madeup", vmiSource, podSource)
totalVMs++
}
for i := 0; i < 50; i++ {
newVirtualMachine(fmt.Sprintf("testvm-%d", i), false, "madeup", vmiSource, podSource)
totalVMs++
}
waitForNumberOfInstancesOnVMIInformerCache(controller, totalVMs)
kv := newKubeVirt(totalVMs)
addKubeVirt(kv)
controller.Execute()
})
It("should shutdown VMIs and not migrate when only shutdown method is set", func() {
const desiredNumberOfVMs = 50
reasons := []string{}
for i := 0; i < desiredNumberOfVMs; i++ {
newVirtualMachine(fmt.Sprintf("testvm-migratable-%d", i), true, "madeup", vmiSource, podSource)
}
for i := 0; i < defaultBatchDeletionCount; i++ {
reasons = append(reasons, SuccessfulEvictVirtualMachineInstanceReason)
}
waitForNumberOfInstancesOnVMIInformerCache(controller, desiredNumberOfVMs)
kv := newKubeVirt(desiredNumberOfVMs)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
evictionCount := 0
shouldExpectMultiplePodEvictions(&evictionCount)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
Expect(evictionCount).To(Equal(defaultBatchDeletionCount))
})
It("should not evict VMIs when an active migration is in flight", func() {
const desiredNumberOfVMs = 2
kv := newKubeVirt(desiredNumberOfVMs)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodEvict}
addKubeVirt(kv)
vmi := newVirtualMachine("testvm-migratable", true, "madeup", vmiSource, podSource)
migrationFeeder.Add(newMigration("vmim-1", vmi.Name, v1.MigrationRunning))
vmi = newVirtualMachine("testvm-nonmigratable", true, "madeup", vmiSource, podSource)
migrationFeeder.Add(newMigration("vmim-2", vmi.Name, v1.MigrationRunning))
waitForNumberOfInstancesOnVMIInformerCache(controller, desiredNumberOfVMs)
controller.Execute()
Expect(recorder.Events).To(BeEmpty())
})
It("should respect custom batch deletion count", func() {
const desiredNumberOfVMs = 50
batchDeletions := 30
reasons := []string{}
for i := 0; i < desiredNumberOfVMs; i++ {
newVirtualMachine(fmt.Sprintf("testvm-migratable-%d", i), true, "madeup", vmiSource, podSource)
}
for i := 0; i < batchDeletions; i++ {
reasons = append(reasons, SuccessfulEvictVirtualMachineInstanceReason)
}
waitForNumberOfInstancesOnVMIInformerCache(controller, desiredNumberOfVMs)
kv := newKubeVirt(desiredNumberOfVMs)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodEvict}
kv.Spec.WorkloadUpdateStrategy.BatchEvictionSize = &batchDeletions
addKubeVirt(kv)
evictionCount := 0
shouldExpectMultiplePodEvictions(&evictionCount)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
Expect(evictionCount).To(Equal(batchDeletions))
})
It("should respect custom batch interval", func() {
batchDeletions := 5
batchInterval := time.Duration(2) * time.Second
reasons := []string{}
for i := 0; i < batchDeletions; i++ {
reasons = append(reasons, SuccessfulEvictVirtualMachineInstanceReason)
}
for i := 0; i < batchDeletions*2; i++ {
newVirtualMachine(fmt.Sprintf("testvm-migratable-1-%d", i), true, "madeup", vmiSource, podSource)
}
waitForNumberOfInstancesOnVMIInformerCache(controller, batchDeletions*2)
kv := newKubeVirt(batchDeletions * 2)
kv.Spec.WorkloadUpdateStrategy.WorkloadUpdateMethods = []v1.WorkloadUpdateMethod{v1.WorkloadUpdateMethodEvict}
kv.Spec.WorkloadUpdateStrategy.BatchEvictionSize = &batchDeletions
kv.Spec.WorkloadUpdateStrategy.BatchEvictionInterval = &metav1.Duration{
Duration: batchInterval,
}
evictionCount := 0
shouldExpectMultiplePodEvictions(&evictionCount)
addKubeVirt(kv)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
// Should do nothing this second execute due to interval
addKubeVirt(kv)
controller.Execute()
Expect(recorder.Events).To(BeEmpty())
// sleep to account for batch interval
time.Sleep(3 * time.Second)
// Should execute another batch of deletions after sleep
addKubeVirt(kv)
controller.Execute()
testutils.ExpectEvents(recorder, reasons...)
Expect(evictionCount).To(Equal(batchDeletions * 2))
})
})
Context("LiveUpdate features", func() {
It("VMI needs to be migrated when memory hotplug is requested", func() {
vmi := api.NewMinimalVMI("testvm")
condition := v1.VirtualMachineInstanceCondition{
Type: v1.VirtualMachineInstanceMemoryChange,
Status: k8sv1.ConditionTrue,
}
virtcontroller.NewVirtualMachineInstanceConditionManager().UpdateCondition(vmi, &condition)
Expect(controller.doesRequireMigration(vmi)).To(BeTrue())
})
})
AfterEach(func() {
close(stop)
Expect(recorder.Events).To(BeEmpty())
})
})
func waitForNumberOfInstancesOnVMIInformerCache(wu *WorkloadUpdateController, vmisNo int) {
EventuallyWithOffset(1, func() []interface{} {
return wu.vmiInformer.GetStore().List()
}, 3*time.Second, 200*time.Millisecond).Should(HaveLen(vmisNo))
}
func newKubeVirt(expectedNumOutdated int) *v1.KubeVirt {
return &v1.KubeVirt{
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
},
Spec: v1.KubeVirtSpec{},
Status: v1.KubeVirtStatus{
Phase: v1.KubeVirtPhaseDeployed,
OutdatedVirtualMachineInstanceWorkloads: &expectedNumOutdated,
},
}
}
func newVirtualMachine(name string, isMigratable bool, image string, vmiSource *framework.FakeControllerSource, podSource *framework.FakeControllerSource) *v1.VirtualMachineInstance {
vmi := api.NewMinimalVMI("testvm")
vmi.Name = name
vmi.Namespace = k8sv1.NamespaceDefault
vmi.Status.LauncherContainerImageVersion = image
vmi.Status.Phase = v1.Running
vmi.UID = "1234"
if isMigratable {
vmi.Status.Conditions = []v1.VirtualMachineInstanceCondition{{Type: v1.VirtualMachineInstanceIsMigratable, Status: k8sv1.ConditionTrue}}
}
pod := &k8sv1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: vmi.Name,
Namespace: vmi.Namespace,
UID: types.UID(vmi.Name),
Labels: map[string]string{
v1.AppLabel: "virt-launcher",
v1.CreatedByLabel: string(vmi.UID),
},
Annotations: map[string]string{
v1.DomainAnnotation: vmi.Name,
},
},
Status: k8sv1.PodStatus{
Phase: k8sv1.PodRunning,
ContainerStatuses: []k8sv1.ContainerStatus{
{Ready: false, Name: "compute", State: k8sv1.ContainerState{Running: &k8sv1.ContainerStateRunning{}}},
},
},
}
vmi.Status.ActivePods = map[types.UID]string{
pod.UID: "node1",
}
vmiSource.Add(vmi)
podSource.Add(pod)
return vmi
}
func newMigration(name string, vmi string, phase v1.VirtualMachineInstanceMigrationPhase) *v1.VirtualMachineInstanceMigration {
migration := kubecli.NewMinimalMigration(name)
migration.Status.Phase = phase
migration.Spec.VMIName = vmi
migration.Namespace = k8sv1.NamespaceDefault
return migration
}