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daemon_controller_test.go
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daemon_controller_test.go
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/*
Copyright 2015 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 daemon
import (
"fmt"
"reflect"
"sort"
"strconv"
"sync"
"testing"
"k8s.io/api/core/v1"
extensions "k8s.io/api/extensions/v1beta1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/apiserver/pkg/storage/names"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes/fake"
core "k8s.io/client-go/testing"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/testapi"
podutil "k8s.io/kubernetes/pkg/api/v1/pod"
"k8s.io/kubernetes/pkg/controller"
kubelettypes "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/securitycontext"
labelsutil "k8s.io/kubernetes/pkg/util/labels"
"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm"
)
var (
simpleDaemonSetLabel = map[string]string{"name": "simple-daemon", "type": "production"}
simpleDaemonSetLabel2 = map[string]string{"name": "simple-daemon", "type": "test"}
simpleNodeLabel = map[string]string{"color": "blue", "speed": "fast"}
simpleNodeLabel2 = map[string]string{"color": "red", "speed": "fast"}
alwaysReady = func() bool { return true }
)
var (
noScheduleTolerations = []v1.Toleration{{Key: "dedicated", Value: "user1", Effect: "NoSchedule"}}
noScheduleTaints = []v1.Taint{{Key: "dedicated", Value: "user1", Effect: "NoSchedule"}}
noExecuteTaints = []v1.Taint{{Key: "dedicated", Value: "user1", Effect: "NoExecute"}}
)
var (
nodeNotReady = []v1.Taint{{
Key: algorithm.TaintNodeNotReady,
Effect: v1.TaintEffectNoExecute,
TimeAdded: metav1.Now(),
}}
nodeUnreachable = []v1.Taint{{
Key: algorithm.TaintNodeUnreachable,
Effect: v1.TaintEffectNoExecute,
TimeAdded: metav1.Now(),
}}
)
func getKey(ds *extensions.DaemonSet, t *testing.T) string {
if key, err := controller.KeyFunc(ds); err != nil {
t.Errorf("Unexpected error getting key for ds %v: %v", ds.Name, err)
return ""
} else {
return key
}
}
func newDaemonSet(name string) *extensions.DaemonSet {
two := int32(2)
return &extensions.DaemonSet{
TypeMeta: metav1.TypeMeta{APIVersion: testapi.Extensions.GroupVersion().String()},
ObjectMeta: metav1.ObjectMeta{
UID: uuid.NewUUID(),
Name: name,
Namespace: metav1.NamespaceDefault,
},
Spec: extensions.DaemonSetSpec{
RevisionHistoryLimit: &two,
UpdateStrategy: extensions.DaemonSetUpdateStrategy{
Type: extensions.OnDeleteDaemonSetStrategyType,
},
Selector: &metav1.LabelSelector{MatchLabels: simpleDaemonSetLabel},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: simpleDaemonSetLabel,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Image: "foo/bar",
TerminationMessagePath: v1.TerminationMessagePathDefault,
ImagePullPolicy: v1.PullIfNotPresent,
SecurityContext: securitycontext.ValidSecurityContextWithContainerDefaults(),
},
},
DNSPolicy: v1.DNSDefault,
},
},
},
}
}
func newRollbackStrategy() *extensions.DaemonSetUpdateStrategy {
one := intstr.FromInt(1)
return &extensions.DaemonSetUpdateStrategy{
Type: extensions.RollingUpdateDaemonSetStrategyType,
RollingUpdate: &extensions.RollingUpdateDaemonSet{MaxUnavailable: &one},
}
}
func newOnDeleteStrategy() *extensions.DaemonSetUpdateStrategy {
return &extensions.DaemonSetUpdateStrategy{
Type: extensions.OnDeleteDaemonSetStrategyType,
}
}
func updateStrategies() []*extensions.DaemonSetUpdateStrategy {
return []*extensions.DaemonSetUpdateStrategy{newOnDeleteStrategy(), newRollbackStrategy()}
}
func newNode(name string, label map[string]string) *v1.Node {
return &v1.Node{
TypeMeta: metav1.TypeMeta{APIVersion: api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String()},
ObjectMeta: metav1.ObjectMeta{
Name: name,
Labels: label,
Namespace: metav1.NamespaceDefault,
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{Type: v1.NodeReady, Status: v1.ConditionTrue},
},
Allocatable: v1.ResourceList{
v1.ResourcePods: resource.MustParse("100"),
},
},
}
}
func addNodes(nodeStore cache.Store, startIndex, numNodes int, label map[string]string) {
for i := startIndex; i < startIndex+numNodes; i++ {
nodeStore.Add(newNode(fmt.Sprintf("node-%d", i), label))
}
}
func newPod(podName string, nodeName string, label map[string]string, ds *extensions.DaemonSet) *v1.Pod {
// Add hash unique label to the pod
newLabels := label
var podSpec v1.PodSpec
// Copy pod spec from DaemonSet template, or use a default one if DaemonSet is nil
if ds != nil {
hash := fmt.Sprint(controller.ComputeHash(&ds.Spec.Template, ds.Status.CollisionCount))
newLabels = labelsutil.CloneAndAddLabel(label, extensions.DefaultDaemonSetUniqueLabelKey, hash)
podSpec = ds.Spec.Template.Spec
} else {
podSpec = v1.PodSpec{
Containers: []v1.Container{
{
Image: "foo/bar",
TerminationMessagePath: v1.TerminationMessagePathDefault,
ImagePullPolicy: v1.PullIfNotPresent,
SecurityContext: securitycontext.ValidSecurityContextWithContainerDefaults(),
},
},
}
}
// Add node name to the pod
if len(nodeName) > 0 {
podSpec.NodeName = nodeName
}
pod := &v1.Pod{
TypeMeta: metav1.TypeMeta{APIVersion: api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String()},
ObjectMeta: metav1.ObjectMeta{
GenerateName: podName,
Labels: newLabels,
Namespace: metav1.NamespaceDefault,
},
Spec: podSpec,
}
pod.Name = names.SimpleNameGenerator.GenerateName(podName)
if ds != nil {
pod.OwnerReferences = []metav1.OwnerReference{*metav1.NewControllerRef(ds, controllerKind)}
}
return pod
}
func addPods(podStore cache.Store, nodeName string, label map[string]string, ds *extensions.DaemonSet, number int) {
for i := 0; i < number; i++ {
pod := newPod(fmt.Sprintf("%s-", nodeName), nodeName, label, ds)
podStore.Add(pod)
}
}
func addFailedPods(podStore cache.Store, nodeName string, label map[string]string, ds *extensions.DaemonSet, number int) {
for i := 0; i < number; i++ {
pod := newPod(fmt.Sprintf("%s-", nodeName), nodeName, label, ds)
pod.Status = v1.PodStatus{Phase: v1.PodFailed}
podStore.Add(pod)
}
}
type fakePodControl struct {
sync.Mutex
*controller.FakePodControl
podStore cache.Store
podIDMap map[string]*v1.Pod
}
func newFakePodControl() *fakePodControl {
podIDMap := make(map[string]*v1.Pod)
return &fakePodControl{
FakePodControl: &controller.FakePodControl{},
podIDMap: podIDMap}
}
func (f *fakePodControl) CreatePodsOnNode(nodeName, namespace string, template *v1.PodTemplateSpec, object runtime.Object, controllerRef *metav1.OwnerReference) error {
f.Lock()
defer f.Unlock()
if err := f.FakePodControl.CreatePodsOnNode(nodeName, namespace, template, object, controllerRef); err != nil {
return fmt.Errorf("failed to create pod on node %q", nodeName)
}
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Labels: template.Labels,
Namespace: namespace,
GenerateName: fmt.Sprintf("%s-", nodeName),
},
}
if err := api.Scheme.Convert(&template.Spec, &pod.Spec, nil); err != nil {
return fmt.Errorf("unable to convert pod template: %v", err)
}
if len(nodeName) != 0 {
pod.Spec.NodeName = nodeName
}
pod.Name = names.SimpleNameGenerator.GenerateName(fmt.Sprintf("%s-", nodeName))
f.podStore.Update(pod)
f.podIDMap[pod.Name] = pod
return nil
}
func (f *fakePodControl) DeletePod(namespace string, podID string, object runtime.Object) error {
f.Lock()
defer f.Unlock()
if err := f.FakePodControl.DeletePod(namespace, podID, object); err != nil {
return fmt.Errorf("failed to delete pod %q", podID)
}
pod, ok := f.podIDMap[podID]
if !ok {
return fmt.Errorf("pod %q does not exist", podID)
}
f.podStore.Delete(pod)
delete(f.podIDMap, podID)
return nil
}
type daemonSetsController struct {
*DaemonSetsController
dsStore cache.Store
historyStore cache.Store
podStore cache.Store
nodeStore cache.Store
fakeRecorder *record.FakeRecorder
}
func newTestController(initialObjects ...runtime.Object) (*daemonSetsController, *fakePodControl, *fake.Clientset) {
clientset := fake.NewSimpleClientset(initialObjects...)
informerFactory := informers.NewSharedInformerFactory(clientset, controller.NoResyncPeriodFunc())
dsc := NewDaemonSetsController(
informerFactory.Extensions().V1beta1().DaemonSets(),
informerFactory.Apps().V1beta1().ControllerRevisions(),
informerFactory.Core().V1().Pods(),
informerFactory.Core().V1().Nodes(),
clientset,
)
fakeRecorder := record.NewFakeRecorder(100)
dsc.eventRecorder = fakeRecorder
dsc.podStoreSynced = alwaysReady
dsc.nodeStoreSynced = alwaysReady
dsc.dsStoreSynced = alwaysReady
dsc.historyStoreSynced = alwaysReady
podControl := newFakePodControl()
dsc.podControl = podControl
podControl.podStore = informerFactory.Core().V1().Pods().Informer().GetStore()
return &daemonSetsController{
dsc,
informerFactory.Extensions().V1beta1().DaemonSets().Informer().GetStore(),
informerFactory.Apps().V1beta1().ControllerRevisions().Informer().GetStore(),
informerFactory.Core().V1().Pods().Informer().GetStore(),
informerFactory.Core().V1().Nodes().Informer().GetStore(),
fakeRecorder,
}, podControl, clientset
}
func validateSyncDaemonSets(t *testing.T, manager *daemonSetsController, fakePodControl *fakePodControl, expectedCreates, expectedDeletes int, expectedEvents int) {
if len(fakePodControl.Templates) != expectedCreates {
t.Errorf("Unexpected number of creates. Expected %d, saw %d\n", expectedCreates, len(fakePodControl.Templates))
}
if len(fakePodControl.DeletePodName) != expectedDeletes {
t.Errorf("Unexpected number of deletes. Expected %d, saw %d\n", expectedDeletes, len(fakePodControl.DeletePodName))
}
if len(manager.fakeRecorder.Events) != expectedEvents {
t.Errorf("Unexpected number of events. Expected %d, saw %d\n", expectedEvents, len(manager.fakeRecorder.Events))
}
// Every Pod created should have a ControllerRef.
if got, want := len(fakePodControl.ControllerRefs), expectedCreates; got != want {
t.Errorf("len(ControllerRefs) = %v, want %v", got, want)
}
// Make sure the ControllerRefs are correct.
for _, controllerRef := range fakePodControl.ControllerRefs {
if got, want := controllerRef.APIVersion, "extensions/v1beta1"; got != want {
t.Errorf("controllerRef.APIVersion = %q, want %q", got, want)
}
if got, want := controllerRef.Kind, "DaemonSet"; got != want {
t.Errorf("controllerRef.Kind = %q, want %q", got, want)
}
if controllerRef.Controller == nil || *controllerRef.Controller != true {
t.Errorf("controllerRef.Controller is not set to true")
}
}
}
func syncAndValidateDaemonSets(t *testing.T, manager *daemonSetsController, ds *extensions.DaemonSet, podControl *fakePodControl, expectedCreates, expectedDeletes int, expectedEvents int) {
key, err := controller.KeyFunc(ds)
if err != nil {
t.Errorf("Could not get key for daemon.")
}
manager.syncHandler(key)
validateSyncDaemonSets(t, manager, podControl, expectedCreates, expectedDeletes, expectedEvents)
}
// clearExpectations copies the FakePodControl to PodStore and clears the create and delete expectations.
func clearExpectations(t *testing.T, manager *daemonSetsController, ds *extensions.DaemonSet, fakePodControl *fakePodControl) {
fakePodControl.Clear()
key, err := controller.KeyFunc(ds)
if err != nil {
t.Errorf("Could not get key for daemon.")
return
}
manager.expectations.DeleteExpectations(key)
}
func TestDeleteFinalStateUnknown(t *testing.T) {
for _, strategy := range updateStrategies() {
manager, _, _ := newTestController()
addNodes(manager.nodeStore, 0, 1, nil)
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
// DeletedFinalStateUnknown should queue the embedded DS if found.
manager.deleteDaemonset(cache.DeletedFinalStateUnknown{Key: "foo", Obj: ds})
enqueuedKey, _ := manager.queue.Get()
if enqueuedKey.(string) != "default/foo" {
t.Errorf("expected delete of DeletedFinalStateUnknown to enqueue the daemonset but found: %#v", enqueuedKey)
}
}
}
func markPodsReady(store cache.Store) {
// mark pods as ready
for _, obj := range store.List() {
pod := obj.(*v1.Pod)
markPodReady(pod)
}
}
func markPodReady(pod *v1.Pod) {
condition := v1.PodCondition{Type: v1.PodReady, Status: v1.ConditionTrue}
podutil.UpdatePodCondition(&pod.Status, &condition)
}
// DaemonSets without node selectors should launch pods on every node.
func TestSimpleDaemonSetLaunchesPods(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
manager, podControl, _ := newTestController(ds)
addNodes(manager.nodeStore, 0, 5, nil)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 5, 0, 0)
}
}
// Simulate a cluster with 100 nodes, but simulate a limit (like a quota limit)
// of 10 pods, and verify that the ds doesn't make 100 create calls per sync pass
func TestSimpleDaemonSetPodCreateErrors(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
manager, podControl, _ := newTestController(ds)
podControl.FakePodControl.CreateLimit = 10
addNodes(manager.nodeStore, 0, podControl.FakePodControl.CreateLimit*10, nil)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, podControl.FakePodControl.CreateLimit, 0, 0)
expectedLimit := 0
for pass := uint8(0); expectedLimit <= podControl.FakePodControl.CreateLimit; pass++ {
expectedLimit += controller.SlowStartInitialBatchSize << pass
}
if podControl.FakePodControl.CreateCallCount > expectedLimit {
t.Errorf("Unexpected number of create calls. Expected <= %d, saw %d\n", podControl.FakePodControl.CreateLimit*2, podControl.FakePodControl.CreateCallCount)
}
}
}
func TestSimpleDaemonSetUpdatesStatusAfterLaunchingPods(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
manager, podControl, clientset := newTestController(ds)
var updated *extensions.DaemonSet
clientset.PrependReactor("update", "daemonsets", func(action core.Action) (handled bool, ret runtime.Object, err error) {
if action.GetSubresource() != "status" {
return false, nil, nil
}
if u, ok := action.(core.UpdateAction); ok {
updated = u.GetObject().(*extensions.DaemonSet)
}
return false, nil, nil
})
manager.dsStore.Add(ds)
addNodes(manager.nodeStore, 0, 5, nil)
syncAndValidateDaemonSets(t, manager, ds, podControl, 5, 0, 0)
// Make sure the single sync() updated Status already for the change made
// during the manage() phase.
if got, want := updated.Status.CurrentNumberScheduled, int32(5); got != want {
t.Errorf("Status.CurrentNumberScheduled = %v, want %v", got, want)
}
}
}
// DaemonSets should do nothing if there aren't any nodes
func TestNoNodesDoesNothing(t *testing.T) {
for _, strategy := range updateStrategies() {
manager, podControl, _ := newTestController()
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
// DaemonSets without node selectors should launch on a single node in a
// single node cluster.
func TestOneNodeDaemonLaunchesPod(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
manager, podControl, _ := newTestController(ds)
manager.nodeStore.Add(newNode("only-node", nil))
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 0)
}
}
// DaemonSets should place onto NotReady nodes
func TestNotReadNodeDaemonDoesNotLaunchPod(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
manager, podControl, _ := newTestController(ds)
node := newNode("not-ready", nil)
node.Status.Conditions = []v1.NodeCondition{
{Type: v1.NodeReady, Status: v1.ConditionFalse},
}
manager.nodeStore.Add(node)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 0)
}
}
func resourcePodSpec(nodeName, memory, cpu string) v1.PodSpec {
return v1.PodSpec{
NodeName: nodeName,
Containers: []v1.Container{{
Resources: v1.ResourceRequirements{
Requests: allocatableResources(memory, cpu),
},
}},
}
}
func resourcePodSpecWithoutNodeName(memory, cpu string) v1.PodSpec {
return v1.PodSpec{
Containers: []v1.Container{{
Resources: v1.ResourceRequirements{
Requests: allocatableResources(memory, cpu),
},
}},
}
}
func allocatableResources(memory, cpu string) v1.ResourceList {
return v1.ResourceList{
v1.ResourceMemory: resource.MustParse(memory),
v1.ResourceCPU: resource.MustParse(cpu),
v1.ResourcePods: resource.MustParse("100"),
}
}
// DaemonSets should not place onto nodes with insufficient free resource
func TestInsufficientCapacityNodeDaemonDoesNotLaunchPod(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec := resourcePodSpec("too-much-mem", "75M", "75m")
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec
manager, podControl, _ := newTestController(ds)
node := newNode("too-much-mem", nil)
node.Status.Allocatable = allocatableResources("100M", "200m")
manager.nodeStore.Add(node)
manager.podStore.Add(&v1.Pod{
Spec: podSpec,
})
manager.dsStore.Add(ds)
switch strategy.Type {
case extensions.OnDeleteDaemonSetStrategyType:
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 2)
case extensions.RollingUpdateDaemonSetStrategyType:
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 3)
default:
t.Fatalf("unexpected UpdateStrategy %+v", strategy)
}
}
}
// DaemonSets should not unschedule a daemonset pod from a node with insufficient free resource
func TestInsufficientCapacityNodeDaemonDoesNotUnscheduleRunningPod(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec := resourcePodSpec("too-much-mem", "75M", "75m")
podSpec.NodeName = "too-much-mem"
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec
manager, podControl, _ := newTestController(ds)
node := newNode("too-much-mem", nil)
node.Status.Allocatable = allocatableResources("100M", "200m")
manager.nodeStore.Add(node)
manager.podStore.Add(&v1.Pod{
Spec: podSpec,
})
manager.dsStore.Add(ds)
switch strategy.Type {
case extensions.OnDeleteDaemonSetStrategyType:
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 2)
case extensions.RollingUpdateDaemonSetStrategyType:
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 3)
default:
t.Fatalf("unexpected UpdateStrategy %+v", strategy)
}
}
}
// DaemonSets should only place onto nodes with sufficient free resource and matched node selector
func TestInsufficientCapacityNodeSufficientCapacityWithNodeLabelDaemonLaunchPod(t *testing.T) {
podSpec := resourcePodSpecWithoutNodeName("50M", "75m")
ds := newDaemonSet("foo")
ds.Spec.Template.Spec = podSpec
ds.Spec.Template.Spec.NodeSelector = simpleNodeLabel
manager, podControl, _ := newTestController(ds)
node1 := newNode("not-enough-resource", nil)
node1.Status.Allocatable = allocatableResources("10M", "20m")
node2 := newNode("enough-resource", simpleNodeLabel)
node2.Status.Allocatable = allocatableResources("100M", "200m")
manager.nodeStore.Add(node1)
manager.nodeStore.Add(node2)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 0)
// we do not expect any event for insufficient free resource
if len(manager.fakeRecorder.Events) != 0 {
t.Fatalf("unexpected events, got %v, expected %v: %+v", len(manager.fakeRecorder.Events), 0, manager.fakeRecorder.Events)
}
}
func TestSufficientCapacityWithTerminatedPodsDaemonLaunchesPod(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec := resourcePodSpec("too-much-mem", "75M", "75m")
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec
manager, podControl, _ := newTestController(ds)
node := newNode("too-much-mem", nil)
node.Status.Allocatable = allocatableResources("100M", "200m")
manager.nodeStore.Add(node)
manager.podStore.Add(&v1.Pod{
Spec: podSpec,
Status: v1.PodStatus{Phase: v1.PodSucceeded},
})
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 1)
}
}
// DaemonSets should place onto nodes with sufficient free resource
func TestSufficientCapacityNodeDaemonLaunchesPod(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec := resourcePodSpec("not-too-much-mem", "75M", "75m")
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec
manager, podControl, _ := newTestController(ds)
node := newNode("not-too-much-mem", nil)
node.Status.Allocatable = allocatableResources("200M", "200m")
manager.nodeStore.Add(node)
manager.podStore.Add(&v1.Pod{
Spec: podSpec,
})
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 1)
}
}
// DaemonSet should launch a pod on a node with taint NetworkUnavailable condition.
func TestNetworkUnavailableNodeDaemonLaunchesPod(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("simple")
ds.Spec.UpdateStrategy = *strategy
manager, podControl, _ := newTestController(ds)
node := newNode("network-unavailable", nil)
node.Status.Conditions = []v1.NodeCondition{
{Type: v1.NodeNetworkUnavailable, Status: v1.ConditionTrue},
}
manager.nodeStore.Add(node)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 0)
}
}
// DaemonSets not take any actions when being deleted
func TestDontDoAnythingIfBeingDeleted(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec := resourcePodSpec("not-too-much-mem", "75M", "75m")
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec
now := metav1.Now()
ds.DeletionTimestamp = &now
manager, podControl, _ := newTestController(ds)
node := newNode("not-too-much-mem", nil)
node.Status.Allocatable = allocatableResources("200M", "200m")
manager.nodeStore.Add(node)
manager.podStore.Add(&v1.Pod{
Spec: podSpec,
})
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
func TestDontDoAnythingIfBeingDeletedRace(t *testing.T) {
for _, strategy := range updateStrategies() {
// Bare client says it IS deleted.
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
now := metav1.Now()
ds.DeletionTimestamp = &now
manager, podControl, _ := newTestController(ds)
addNodes(manager.nodeStore, 0, 5, nil)
// Lister (cache) says it's NOT deleted.
ds2 := *ds
ds2.DeletionTimestamp = nil
manager.dsStore.Add(&ds2)
// The existence of a matching orphan should block all actions in this state.
pod := newPod("pod1-", "node-0", simpleDaemonSetLabel, nil)
manager.podStore.Add(pod)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
// DaemonSets should not place onto nodes that would cause port conflicts
func TestPortConflictNodeDaemonDoesNotLaunchPod(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec := v1.PodSpec{
NodeName: "port-conflict",
Containers: []v1.Container{{
Ports: []v1.ContainerPort{{
HostPort: 666,
}},
}},
}
manager, podControl, _ := newTestController()
node := newNode("port-conflict", nil)
manager.nodeStore.Add(node)
manager.podStore.Add(&v1.Pod{
Spec: podSpec,
})
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
// Test that if the node is already scheduled with a pod using a host port
// but belonging to the same daemonset, we don't delete that pod
//
// Issue: https://github.com/kubernetes/kubernetes/issues/22309
func TestPortConflictWithSameDaemonPodDoesNotDeletePod(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec := v1.PodSpec{
NodeName: "port-conflict",
Containers: []v1.Container{{
Ports: []v1.ContainerPort{{
HostPort: 666,
}},
}},
}
manager, podControl, _ := newTestController()
node := newNode("port-conflict", nil)
manager.nodeStore.Add(node)
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec
manager.dsStore.Add(ds)
pod := newPod(ds.Name+"-", node.Name, simpleDaemonSetLabel, ds)
manager.podStore.Add(pod)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
// DaemonSets should place onto nodes that would not cause port conflicts
func TestNoPortConflictNodeDaemonLaunchesPod(t *testing.T) {
for _, strategy := range updateStrategies() {
podSpec1 := v1.PodSpec{
NodeName: "no-port-conflict",
Containers: []v1.Container{{
Ports: []v1.ContainerPort{{
HostPort: 6661,
}},
}},
}
podSpec2 := v1.PodSpec{
NodeName: "no-port-conflict",
Containers: []v1.Container{{
Ports: []v1.ContainerPort{{
HostPort: 6662,
}},
}},
}
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec = podSpec2
manager, podControl, _ := newTestController(ds)
node := newNode("no-port-conflict", nil)
manager.nodeStore.Add(node)
manager.podStore.Add(&v1.Pod{
Spec: podSpec1,
})
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 0)
}
}
// DaemonSetController should not sync DaemonSets with empty pod selectors.
//
// issue https://github.com/kubernetes/kubernetes/pull/23223
func TestPodIsNotDeletedByDaemonsetWithEmptyLabelSelector(t *testing.T) {
// Create a misconfigured DaemonSet. An empty pod selector is invalid but could happen
// if we upgrade and make a backwards incompatible change.
//
// The node selector matches no nodes which mimics the behavior of kubectl delete.
//
// The DaemonSet should not schedule pods and should not delete scheduled pods in
// this case even though it's empty pod selector matches all pods. The DaemonSetController
// should detect this misconfiguration and choose not to sync the DaemonSet. We should
// not observe a deletion of the pod on node1.
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ls := metav1.LabelSelector{}
ds.Spec.Selector = &ls
ds.Spec.Template.Spec.NodeSelector = map[string]string{"foo": "bar"}
manager, podControl, _ := newTestController(ds)
manager.nodeStore.Add(newNode("node1", nil))
// Create pod not controlled by a daemonset.
manager.podStore.Add(&v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{"bang": "boom"},
Namespace: metav1.NamespaceDefault,
},
Spec: v1.PodSpec{
NodeName: "node1",
},
})
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 1)
}
}
// Controller should not create pods on nodes which have daemon pods, and should remove excess pods from nodes that have extra pods.
func TestDealsWithExistingPods(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
manager, podControl, _ := newTestController(ds)
manager.dsStore.Add(ds)
addNodes(manager.nodeStore, 0, 5, nil)
addPods(manager.podStore, "node-1", simpleDaemonSetLabel, ds, 1)
addPods(manager.podStore, "node-2", simpleDaemonSetLabel, ds, 2)
addPods(manager.podStore, "node-3", simpleDaemonSetLabel, ds, 5)
addPods(manager.podStore, "node-4", simpleDaemonSetLabel2, ds, 2)
syncAndValidateDaemonSets(t, manager, ds, podControl, 2, 5, 0)
}
}
// Daemon with node selector should launch pods on nodes matching selector.
func TestSelectorDaemonLaunchesPods(t *testing.T) {
for _, strategy := range updateStrategies() {
daemon := newDaemonSet("foo")
daemon.Spec.UpdateStrategy = *strategy
daemon.Spec.Template.Spec.NodeSelector = simpleNodeLabel
manager, podControl, _ := newTestController(daemon)
addNodes(manager.nodeStore, 0, 4, nil)
addNodes(manager.nodeStore, 4, 3, simpleNodeLabel)
manager.dsStore.Add(daemon)
syncAndValidateDaemonSets(t, manager, daemon, podControl, 3, 0, 0)
}
}
// Daemon with node selector should delete pods from nodes that do not satisfy selector.
func TestSelectorDaemonDeletesUnselectedPods(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec.NodeSelector = simpleNodeLabel
manager, podControl, _ := newTestController(ds)
manager.dsStore.Add(ds)
addNodes(manager.nodeStore, 0, 5, nil)
addNodes(manager.nodeStore, 5, 5, simpleNodeLabel)
addPods(manager.podStore, "node-0", simpleDaemonSetLabel2, ds, 2)
addPods(manager.podStore, "node-1", simpleDaemonSetLabel, ds, 3)
addPods(manager.podStore, "node-1", simpleDaemonSetLabel2, ds, 1)
addPods(manager.podStore, "node-4", simpleDaemonSetLabel, ds, 1)
syncAndValidateDaemonSets(t, manager, ds, podControl, 5, 4, 0)
}
}
// DaemonSet with node selector should launch pods on nodes matching selector, but also deal with existing pods on nodes.
func TestSelectorDaemonDealsWithExistingPods(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec.NodeSelector = simpleNodeLabel
manager, podControl, _ := newTestController(ds)
manager.dsStore.Add(ds)
addNodes(manager.nodeStore, 0, 5, nil)
addNodes(manager.nodeStore, 5, 5, simpleNodeLabel)
addPods(manager.podStore, "node-0", simpleDaemonSetLabel, ds, 1)
addPods(manager.podStore, "node-1", simpleDaemonSetLabel, ds, 3)
addPods(manager.podStore, "node-1", simpleDaemonSetLabel2, ds, 2)
addPods(manager.podStore, "node-2", simpleDaemonSetLabel, ds, 4)
addPods(manager.podStore, "node-6", simpleDaemonSetLabel, ds, 13)
addPods(manager.podStore, "node-7", simpleDaemonSetLabel2, ds, 4)
addPods(manager.podStore, "node-9", simpleDaemonSetLabel, ds, 1)
addPods(manager.podStore, "node-9", simpleDaemonSetLabel2, ds, 1)
syncAndValidateDaemonSets(t, manager, ds, podControl, 3, 20, 0)
}
}
// DaemonSet with node selector which does not match any node labels should not launch pods.
func TestBadSelectorDaemonDoesNothing(t *testing.T) {
for _, strategy := range updateStrategies() {
manager, podControl, _ := newTestController()
addNodes(manager.nodeStore, 0, 4, nil)
addNodes(manager.nodeStore, 4, 3, simpleNodeLabel)
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec.NodeSelector = simpleNodeLabel2
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
// DaemonSet with node name should launch pod on node with corresponding name.
func TestNameDaemonSetLaunchesPods(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec.NodeName = "node-0"
manager, podControl, _ := newTestController(ds)
addNodes(manager.nodeStore, 0, 5, nil)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 0)
}
}
// DaemonSet with node name that does not exist should not launch pods.
func TestBadNameDaemonSetDoesNothing(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec.NodeName = "node-10"
manager, podControl, _ := newTestController(ds)
addNodes(manager.nodeStore, 0, 5, nil)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
// DaemonSet with node selector, and node name, matching a node, should launch a pod on the node.
func TestNameAndSelectorDaemonSetLaunchesPods(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec.NodeSelector = simpleNodeLabel
ds.Spec.Template.Spec.NodeName = "node-6"
manager, podControl, _ := newTestController(ds)
addNodes(manager.nodeStore, 0, 4, nil)
addNodes(manager.nodeStore, 4, 3, simpleNodeLabel)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 1, 0, 0)
}
}
// DaemonSet with node selector that matches some nodes, and node name that matches a different node, should do nothing.
func TestInconsistentNameSelectorDaemonSetDoesNothing(t *testing.T) {
for _, strategy := range updateStrategies() {
ds := newDaemonSet("foo")
ds.Spec.UpdateStrategy = *strategy
ds.Spec.Template.Spec.NodeSelector = simpleNodeLabel
ds.Spec.Template.Spec.NodeName = "node-0"
manager, podControl, _ := newTestController(ds)
addNodes(manager.nodeStore, 0, 4, nil)
addNodes(manager.nodeStore, 4, 3, simpleNodeLabel)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 0, 0, 0)
}
}
// DaemonSet with node selector, matching some nodes, should launch pods on all the nodes.
func TestSelectorDaemonSetLaunchesPods(t *testing.T) {
ds := newDaemonSet("foo")
ds.Spec.Template.Spec.NodeSelector = simpleNodeLabel
manager, podControl, _ := newTestController(ds)
addNodes(manager.nodeStore, 0, 4, nil)
addNodes(manager.nodeStore, 4, 3, simpleNodeLabel)
manager.dsStore.Add(ds)
syncAndValidateDaemonSets(t, manager, ds, podControl, 3, 0, 0)
}
// Daemon with node affinity should launch pods on nodes matching affinity.
func TestNodeAffinityDaemonLaunchesPods(t *testing.T) {
for _, strategy := range updateStrategies() {
daemon := newDaemonSet("foo")
daemon.Spec.UpdateStrategy = *strategy
daemon.Spec.Template.Spec.Affinity = &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: "color",
Operator: v1.NodeSelectorOpIn,
Values: []string{simpleNodeLabel["color"]},
},
},
},
},