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nodecontroller_test.go
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nodecontroller_test.go
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/*
Copyright 2014 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 node
import (
"net"
"strings"
"testing"
"time"
"k8s.io/api/core/v1"
extensions "k8s.io/api/extensions/v1beta1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/diff"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/informers"
coreinformers "k8s.io/client-go/informers/core/v1"
extensionsinformers "k8s.io/client-go/informers/extensions/v1beta1"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/fake"
testcore "k8s.io/client-go/testing"
"k8s.io/kubernetes/pkg/cloudprovider"
fakecloud "k8s.io/kubernetes/pkg/cloudprovider/providers/fake"
"k8s.io/kubernetes/pkg/controller"
"k8s.io/kubernetes/pkg/controller/node/ipam"
"k8s.io/kubernetes/pkg/controller/node/scheduler"
"k8s.io/kubernetes/pkg/controller/node/util"
"k8s.io/kubernetes/pkg/controller/testutil"
kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
"k8s.io/kubernetes/pkg/util/node"
taintutils "k8s.io/kubernetes/pkg/util/taints"
"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm"
)
const (
testNodeMonitorGracePeriod = 40 * time.Second
testNodeStartupGracePeriod = 60 * time.Second
testNodeMonitorPeriod = 5 * time.Second
testRateLimiterQPS = float32(10000)
testLargeClusterThreshold = 20
testUnhealthyThreshold = float32(0.55)
)
func alwaysReady() bool { return true }
type nodeController struct {
*Controller
nodeInformer coreinformers.NodeInformer
daemonSetInformer extensionsinformers.DaemonSetInformer
}
func newNodeControllerFromClient(
cloud cloudprovider.Interface,
kubeClient clientset.Interface,
podEvictionTimeout time.Duration,
evictionLimiterQPS float32,
secondaryEvictionLimiterQPS float32,
largeClusterThreshold int32,
unhealthyZoneThreshold float32,
nodeMonitorGracePeriod time.Duration,
nodeStartupGracePeriod time.Duration,
nodeMonitorPeriod time.Duration,
clusterCIDR *net.IPNet,
serviceCIDR *net.IPNet,
nodeCIDRMaskSize int,
allocateNodeCIDRs bool,
useTaints bool,
) (*nodeController, error) {
factory := informers.NewSharedInformerFactory(kubeClient, controller.NoResyncPeriodFunc())
nodeInformer := factory.Core().V1().Nodes()
daemonSetInformer := factory.Extensions().V1beta1().DaemonSets()
nc, err := NewNodeController(
factory.Core().V1().Pods(),
nodeInformer,
daemonSetInformer,
cloud,
kubeClient,
podEvictionTimeout,
evictionLimiterQPS,
secondaryEvictionLimiterQPS,
largeClusterThreshold,
unhealthyZoneThreshold,
nodeMonitorGracePeriod,
nodeStartupGracePeriod,
nodeMonitorPeriod,
clusterCIDR,
serviceCIDR,
nodeCIDRMaskSize,
allocateNodeCIDRs,
ipam.RangeAllocatorType,
useTaints,
useTaints,
useTaints,
)
if err != nil {
return nil, err
}
nc.podInformerSynced = alwaysReady
nc.nodeInformerSynced = alwaysReady
nc.daemonSetInformerSynced = alwaysReady
return &nodeController{nc, nodeInformer, daemonSetInformer}, nil
}
func syncNodeStore(nc *nodeController, fakeNodeHandler *testutil.FakeNodeHandler) error {
nodes, err := fakeNodeHandler.List(metav1.ListOptions{})
if err != nil {
return err
}
newElems := make([]interface{}, 0, len(nodes.Items))
for i := range nodes.Items {
newElems = append(newElems, &nodes.Items[i])
}
return nc.nodeInformer.Informer().GetStore().Replace(newElems, "newRV")
}
func TestMonitorNodeStatusEvictPods(t *testing.T) {
fakeNow := metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC)
evictionTimeout := 10 * time.Minute
labels := map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
}
// Because of the logic that prevents NC from evicting anything when all Nodes are NotReady
// we need second healthy node in tests. Because of how the tests are written we need to update
// the status of this Node.
healthyNodeNewStatus := v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
// Node status has just been updated, and is NotReady for 10min.
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 9, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
}
table := []struct {
fakeNodeHandler *testutil.FakeNodeHandler
daemonSets []extensions.DaemonSet
timeToPass time.Duration
newNodeStatus v1.NodeStatus
secondNodeNewStatus v1.NodeStatus
expectedEvictPods bool
description string
}{
// Node created recently, with no status (happens only at cluster startup).
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: fakeNow,
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}),
},
daemonSets: nil,
timeToPass: 0,
newNodeStatus: v1.NodeStatus{},
secondNodeNewStatus: healthyNodeNewStatus,
expectedEvictPods: false,
description: "Node created recently, with no status.",
},
// Node created recently without FailureDomain labels which is added back later, with no status (happens only at cluster startup).
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: fakeNow,
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}),
},
daemonSets: nil,
timeToPass: 0,
newNodeStatus: v1.NodeStatus{},
secondNodeNewStatus: healthyNodeNewStatus,
expectedEvictPods: false,
description: "Node created recently without FailureDomain labels which is added back later, with no status (happens only at cluster startup).",
},
// Node created long time ago, and kubelet posted NotReady for a short period of time.
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionFalse,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}),
},
daemonSets: nil,
timeToPass: evictionTimeout,
newNodeStatus: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionFalse,
// Node status has just been updated, and is NotReady for 10min.
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 9, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
secondNodeNewStatus: healthyNodeNewStatus,
expectedEvictPods: false,
description: "Node created long time ago, and kubelet posted NotReady for a short period of time.",
},
// Pod is ds-managed, and kubelet posted NotReady for a long period of time.
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionFalse,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(
&v1.PodList{
Items: []v1.Pod{
{
ObjectMeta: metav1.ObjectMeta{
Name: "pod0",
Namespace: "default",
Labels: map[string]string{"daemon": "yes"},
},
Spec: v1.PodSpec{
NodeName: "node0",
},
},
},
},
),
},
daemonSets: []extensions.DaemonSet{
{
ObjectMeta: metav1.ObjectMeta{
Name: "ds0",
Namespace: "default",
},
Spec: extensions.DaemonSetSpec{
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{"daemon": "yes"},
},
},
},
},
timeToPass: time.Hour,
newNodeStatus: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionFalse,
// Node status has just been updated, and is NotReady for 1hr.
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 59, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
secondNodeNewStatus: healthyNodeNewStatus,
expectedEvictPods: false,
description: "Pod is ds-managed, and kubelet posted NotReady for a long period of time.",
},
// Node created long time ago, and kubelet posted NotReady for a long period of time.
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionFalse,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}),
},
daemonSets: nil,
timeToPass: time.Hour,
newNodeStatus: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionFalse,
// Node status has just been updated, and is NotReady for 1hr.
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 59, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
secondNodeNewStatus: healthyNodeNewStatus,
expectedEvictPods: true,
description: "Node created long time ago, and kubelet posted NotReady for a long period of time.",
},
// Node created long time ago, node controller posted Unknown for a short period of time.
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}),
},
daemonSets: nil,
timeToPass: evictionTimeout - testNodeMonitorGracePeriod,
newNodeStatus: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
// Node status was updated by nodecontroller 10min ago
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
secondNodeNewStatus: healthyNodeNewStatus,
expectedEvictPods: false,
description: "Node created long time ago, node controller posted Unknown for a short period of time.",
},
// Node created long time ago, node controller posted Unknown for a long period of time.
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}),
},
daemonSets: nil,
timeToPass: 60 * time.Minute,
newNodeStatus: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
// Node status was updated by nodecontroller 1hr ago
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
secondNodeNewStatus: healthyNodeNewStatus,
expectedEvictPods: true,
description: "Node created long time ago, node controller posted Unknown for a long period of time.",
},
}
for _, item := range table {
nodeController, _ := newNodeControllerFromClient(
nil,
item.fakeNodeHandler,
evictionTimeout,
testRateLimiterQPS,
testRateLimiterQPS,
testLargeClusterThreshold,
testUnhealthyThreshold,
testNodeMonitorGracePeriod,
testNodeStartupGracePeriod,
testNodeMonitorPeriod,
nil,
nil,
0,
false,
false)
nodeController.now = func() metav1.Time { return fakeNow }
nodeController.recorder = testutil.NewFakeRecorder()
for _, ds := range item.daemonSets {
nodeController.daemonSetInformer.Informer().GetStore().Add(&ds)
}
if err := syncNodeStore(nodeController, item.fakeNodeHandler); err != nil {
t.Errorf("unexpected error: %v", err)
}
if err := nodeController.monitorNodeStatus(); err != nil {
t.Errorf("unexpected error: %v", err)
}
if item.timeToPass > 0 {
nodeController.now = func() metav1.Time { return metav1.Time{Time: fakeNow.Add(item.timeToPass)} }
item.fakeNodeHandler.Existing[0].Status = item.newNodeStatus
item.fakeNodeHandler.Existing[1].Status = item.secondNodeNewStatus
}
if len(item.fakeNodeHandler.Existing[0].Labels) == 0 && len(item.fakeNodeHandler.Existing[1].Labels) == 0 {
item.fakeNodeHandler.Existing[0].Labels = labels
item.fakeNodeHandler.Existing[1].Labels = labels
}
if err := syncNodeStore(nodeController, item.fakeNodeHandler); err != nil {
t.Errorf("unexpected error: %v", err)
}
if err := nodeController.monitorNodeStatus(); err != nil {
t.Errorf("unexpected error: %v", err)
}
zones := testutil.GetZones(item.fakeNodeHandler)
for _, zone := range zones {
if _, ok := nodeController.zonePodEvictor[zone]; ok {
nodeController.zonePodEvictor[zone].Try(func(value scheduler.TimedValue) (bool, time.Duration) {
nodeUID, _ := value.UID.(string)
util.DeletePods(item.fakeNodeHandler, nodeController.recorder, value.Value, nodeUID, nodeController.daemonSetInformer.Lister())
return true, 0
})
} else {
t.Fatalf("Zone %v was unitialized!", zone)
}
}
podEvicted := false
for _, action := range item.fakeNodeHandler.Actions() {
if action.GetVerb() == "delete" && action.GetResource().Resource == "pods" {
podEvicted = true
}
}
if item.expectedEvictPods != podEvicted {
t.Errorf("expected pod eviction: %+v, got %+v for %+v", item.expectedEvictPods,
podEvicted, item.description)
}
}
}
func TestPodStatusChange(t *testing.T) {
fakeNow := metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC)
evictionTimeout := 10 * time.Minute
// Because of the logic that prevents NC from evicting anything when all Nodes are NotReady
// we need second healthy node in tests. Because of how the tests are written we need to update
// the status of this Node.
healthyNodeNewStatus := v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
// Node status has just been updated, and is NotReady for 10min.
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 9, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
}
// Node created long time ago, node controller posted Unknown for a long period of time.
table := []struct {
fakeNodeHandler *testutil.FakeNodeHandler
daemonSets []extensions.DaemonSet
timeToPass time.Duration
newNodeStatus v1.NodeStatus
secondNodeNewStatus v1.NodeStatus
expectedPodUpdate bool
expectedReason string
description string
}{
{
fakeNodeHandler: &testutil.FakeNodeHandler{
Existing: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}),
},
timeToPass: 60 * time.Minute,
newNodeStatus: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
// Node status was updated by nodecontroller 1hr ago
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
secondNodeNewStatus: healthyNodeNewStatus,
expectedPodUpdate: true,
expectedReason: node.NodeUnreachablePodReason,
description: "Node created long time ago, node controller posted Unknown for a " +
"long period of time, the pod status must include reason for termination.",
},
}
for _, item := range table {
nodeController, _ := newNodeControllerFromClient(nil, item.fakeNodeHandler,
evictionTimeout, testRateLimiterQPS, testRateLimiterQPS, testLargeClusterThreshold, testUnhealthyThreshold, testNodeMonitorGracePeriod,
testNodeStartupGracePeriod, testNodeMonitorPeriod, nil, nil, 0, false, false)
nodeController.now = func() metav1.Time { return fakeNow }
nodeController.recorder = testutil.NewFakeRecorder()
if err := syncNodeStore(nodeController, item.fakeNodeHandler); err != nil {
t.Errorf("unexpected error: %v", err)
}
if err := nodeController.monitorNodeStatus(); err != nil {
t.Errorf("unexpected error: %v", err)
}
if item.timeToPass > 0 {
nodeController.now = func() metav1.Time { return metav1.Time{Time: fakeNow.Add(item.timeToPass)} }
item.fakeNodeHandler.Existing[0].Status = item.newNodeStatus
item.fakeNodeHandler.Existing[1].Status = item.secondNodeNewStatus
}
if err := syncNodeStore(nodeController, item.fakeNodeHandler); err != nil {
t.Errorf("unexpected error: %v", err)
}
if err := nodeController.monitorNodeStatus(); err != nil {
t.Errorf("unexpected error: %v", err)
}
zones := testutil.GetZones(item.fakeNodeHandler)
for _, zone := range zones {
nodeController.zonePodEvictor[zone].Try(func(value scheduler.TimedValue) (bool, time.Duration) {
nodeUID, _ := value.UID.(string)
util.DeletePods(item.fakeNodeHandler, nodeController.recorder, value.Value, nodeUID, nodeController.daemonSetStore)
return true, 0
})
}
podReasonUpdate := false
for _, action := range item.fakeNodeHandler.Actions() {
if action.GetVerb() == "update" && action.GetResource().Resource == "pods" {
updateReason := action.(testcore.UpdateActionImpl).GetObject().(*v1.Pod).Status.Reason
podReasonUpdate = true
if updateReason != item.expectedReason {
t.Errorf("expected pod status reason: %+v, got %+v for %+v", item.expectedReason, updateReason, item.description)
}
}
}
if podReasonUpdate != item.expectedPodUpdate {
t.Errorf("expected pod update: %+v, got %+v for %+v", podReasonUpdate, item.expectedPodUpdate, item.description)
}
}
}
func TestMonitorNodeStatusEvictPodsWithDisruption(t *testing.T) {
fakeNow := metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC)
evictionTimeout := 10 * time.Minute
timeToPass := 60 * time.Minute
// Because of the logic that prevents NC from evicting anything when all Nodes are NotReady
// we need second healthy node in tests. Because of how the tests are written we need to update
// the status of this Node.
healthyNodeNewStatus := v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionTrue,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 13, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
}
unhealthyNodeNewStatus := v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
// Node status was updated by nodecontroller 1hr ago
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
}
table := []struct {
nodeList []*v1.Node
podList []v1.Pod
updatedNodeStatuses []v1.NodeStatus
expectedInitialStates map[string]ZoneState
expectedFollowingStates map[string]ZoneState
expectedEvictPods bool
description string
}{
// NetworkDisruption: Node created long time ago, node controller posted Unknown for a long period of time on both Nodes.
// Only zone is down - eviction shouldn't take place
{
nodeList: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
podList: []v1.Pod{*testutil.NewPod("pod0", "node0")},
updatedNodeStatuses: []v1.NodeStatus{
unhealthyNodeNewStatus,
unhealthyNodeNewStatus,
},
expectedInitialStates: map[string]ZoneState{testutil.CreateZoneID("region1", "zone1"): stateFullDisruption},
expectedFollowingStates: map[string]ZoneState{testutil.CreateZoneID("region1", "zone1"): stateFullDisruption},
expectedEvictPods: false,
description: "Network Disruption: Only zone is down - eviction shouldn't take place.",
},
// NetworkDisruption: Node created long time ago, node controller posted Unknown for a long period of time on both Nodes.
// Both zones down - eviction shouldn't take place
{
nodeList: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region2",
kubeletapis.LabelZoneFailureDomain: "zone2",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
},
podList: []v1.Pod{*testutil.NewPod("pod0", "node0")},
updatedNodeStatuses: []v1.NodeStatus{
unhealthyNodeNewStatus,
unhealthyNodeNewStatus,
},
expectedInitialStates: map[string]ZoneState{
testutil.CreateZoneID("region1", "zone1"): stateFullDisruption,
testutil.CreateZoneID("region2", "zone2"): stateFullDisruption,
},
expectedFollowingStates: map[string]ZoneState{
testutil.CreateZoneID("region1", "zone1"): stateFullDisruption,
testutil.CreateZoneID("region2", "zone2"): stateFullDisruption,
},
expectedEvictPods: false,
description: "Network Disruption: Both zones down - eviction shouldn't take place.",
},
// NetworkDisruption: Node created long time ago, node controller posted Unknown for a long period of time on both Nodes.
// One zone is down - eviction should take place
{
nodeList: []*v1.Node{
{
ObjectMeta: metav1.ObjectMeta{
Name: "node0",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",
kubeletapis.LabelZoneFailureDomain: "zone1",
},
},
Status: v1.NodeStatus{
Conditions: []v1.NodeCondition{
{
Type: v1.NodeReady,
Status: v1.ConditionUnknown,
LastHeartbeatTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
LastTransitionTime: metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
},
},
},
},
{
ObjectMeta: metav1.ObjectMeta{
Name: "node1",
CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
Labels: map[string]string{
kubeletapis.LabelZoneRegion: "region1",