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613 lines
19 KiB
Go
613 lines
19 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package nodecontroller
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import (
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"errors"
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"fmt"
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"sort"
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"sync"
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"testing"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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apierrors "github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/resource"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client/testclient"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/watch"
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)
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const (
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testNodeMonitorGracePeriod = 40 * time.Second
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testNodeStartupGracePeriod = 60 * time.Second
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testNodeMonitorPeriod = 5 * time.Second
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)
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// FakeNodeHandler is a fake implementation of NodesInterface and NodeInterface. It
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// allows test cases to have fine-grained control over mock behaviors. We also need
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// PodsInterface and PodInterface to test list & delet pods, which is implemented in
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// the embeded client.Fake field.
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type FakeNodeHandler struct {
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*testclient.Fake
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// Input: Hooks determine if request is valid or not
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CreateHook func(*FakeNodeHandler, *api.Node) bool
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Existing []*api.Node
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// Output
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CreatedNodes []*api.Node
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DeletedNodes []*api.Node
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UpdatedNodes []*api.Node
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UpdatedNodeStatuses []*api.Node
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RequestCount int
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// Synchronization
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createLock sync.Mutex
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}
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func (c *FakeNodeHandler) Nodes() client.NodeInterface {
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return c
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}
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func (m *FakeNodeHandler) Create(node *api.Node) (*api.Node, error) {
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m.createLock.Lock()
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defer func() {
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m.RequestCount++
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m.createLock.Unlock()
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}()
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for _, n := range m.Existing {
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if n.Name == node.Name {
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return nil, apierrors.NewAlreadyExists("Minion", node.Name)
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}
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}
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if m.CreateHook == nil || m.CreateHook(m, node) {
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nodeCopy := *node
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m.CreatedNodes = append(m.CreatedNodes, &nodeCopy)
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return node, nil
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} else {
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return nil, errors.New("Create error.")
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}
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}
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func (m *FakeNodeHandler) Get(name string) (*api.Node, error) {
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return nil, nil
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}
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func (m *FakeNodeHandler) List(label labels.Selector, field fields.Selector) (*api.NodeList, error) {
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defer func() { m.RequestCount++ }()
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var nodes []*api.Node
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for i := 0; i < len(m.UpdatedNodes); i++ {
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if !contains(m.UpdatedNodes[i], m.DeletedNodes) {
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nodes = append(nodes, m.UpdatedNodes[i])
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}
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}
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for i := 0; i < len(m.Existing); i++ {
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if !contains(m.Existing[i], m.DeletedNodes) && !contains(m.Existing[i], nodes) {
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nodes = append(nodes, m.Existing[i])
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}
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}
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for i := 0; i < len(m.CreatedNodes); i++ {
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if !contains(m.Existing[i], m.DeletedNodes) && !contains(m.CreatedNodes[i], nodes) {
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nodes = append(nodes, m.CreatedNodes[i])
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}
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}
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nodeList := &api.NodeList{}
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for _, node := range nodes {
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nodeList.Items = append(nodeList.Items, *node)
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}
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return nodeList, nil
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}
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func (m *FakeNodeHandler) Delete(id string) error {
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m.DeletedNodes = append(m.DeletedNodes, newNode(id))
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m.RequestCount++
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return nil
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}
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func (m *FakeNodeHandler) Update(node *api.Node) (*api.Node, error) {
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nodeCopy := *node
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m.UpdatedNodes = append(m.UpdatedNodes, &nodeCopy)
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m.RequestCount++
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return node, nil
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}
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func (m *FakeNodeHandler) UpdateStatus(node *api.Node) (*api.Node, error) {
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nodeCopy := *node
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m.UpdatedNodeStatuses = append(m.UpdatedNodeStatuses, &nodeCopy)
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m.RequestCount++
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return node, nil
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}
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func (m *FakeNodeHandler) Watch(label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
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return nil, nil
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}
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func TestMonitorNodeStatusEvictPods(t *testing.T) {
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fakeNow := util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC)
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evictionTimeout := 10 * time.Minute
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table := []struct {
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fakeNodeHandler *FakeNodeHandler
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timeToPass time.Duration
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newNodeStatus api.NodeStatus
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expectedEvictPods bool
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description string
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}{
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// Node created recently, with no status (happens only at cluster startup).
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: fakeNow,
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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timeToPass: 0,
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newNodeStatus: api.NodeStatus{},
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expectedEvictPods: false,
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description: "Node created recently, with no status.",
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},
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// Node created long time ago, and kubelet posted NotReady for a short period of time.
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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Status: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionFalse,
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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timeToPass: evictionTimeout,
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newNodeStatus: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionFalse,
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// Node status has just been updated, and is NotReady for 10min.
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 9, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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expectedEvictPods: false,
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description: "Node created long time ago, and kubelet posted NotReady for a short period of time.",
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},
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// Node created long time ago, and kubelet posted NotReady for a long period of time.
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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Status: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionFalse,
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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timeToPass: time.Hour,
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newNodeStatus: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionFalse,
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// Node status has just been updated, and is NotReady for 1hr.
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 59, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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expectedEvictPods: true,
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description: "Node created long time ago, and kubelet posted NotReady for a long period of time.",
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},
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// Node created long time ago, node controller posted Unknown for a short period of time.
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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Status: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionUnknown,
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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timeToPass: evictionTimeout - testNodeMonitorGracePeriod,
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newNodeStatus: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionUnknown,
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// Node status was updated by nodecontroller 10min ago
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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expectedEvictPods: false,
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description: "Node created long time ago, node controller posted Unknown for a short period of time.",
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},
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// Node created long time ago, node controller posted Unknown for a long period of time.
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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Status: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionUnknown,
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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timeToPass: 60 * time.Minute,
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newNodeStatus: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionUnknown,
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// Node status was updated by nodecontroller 1hr ago
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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},
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expectedEvictPods: true,
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description: "Node created long time ago, node controller posted Unknown for a long period of time.",
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},
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}
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for _, item := range table {
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podEvictor := NewPodEvictor(util.NewFakeRateLimiter())
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nodeController := NewNodeController(nil, item.fakeNodeHandler,
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evictionTimeout, podEvictor, testNodeMonitorGracePeriod,
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testNodeStartupGracePeriod, testNodeMonitorPeriod, nil, false)
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nodeController.now = func() util.Time { return fakeNow }
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if err := nodeController.monitorNodeStatus(); err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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if item.timeToPass > 0 {
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nodeController.now = func() util.Time { return util.Time{Time: fakeNow.Add(item.timeToPass)} }
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item.fakeNodeHandler.Existing[0].Status = item.newNodeStatus
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}
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if err := nodeController.monitorNodeStatus(); err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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podEvictor.TryEvict(func(nodeName string) { nodeController.deletePods(nodeName) })
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podEvicted := false
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for _, action := range item.fakeNodeHandler.Actions() {
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if action.GetVerb() == "delete" && action.GetResource() == "pods" {
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podEvicted = true
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}
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}
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if item.expectedEvictPods != podEvicted {
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t.Errorf("expected pod eviction: %+v, got %+v for %+v", item.expectedEvictPods,
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podEvicted, item.description)
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}
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}
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}
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func TestMonitorNodeStatusUpdateStatus(t *testing.T) {
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fakeNow := util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC)
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table := []struct {
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fakeNodeHandler *FakeNodeHandler
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timeToPass time.Duration
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newNodeStatus api.NodeStatus
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expectedEvictPods bool
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expectedRequestCount int
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expectedNodes []*api.Node
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}{
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// Node created long time ago, without status:
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// Expect Unknown status posted from node controller.
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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expectedRequestCount: 2, // List+Update
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expectedNodes: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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Status: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionUnknown,
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Reason: fmt.Sprintf("Kubelet never posted node status."),
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LastHeartbeatTime: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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LastTransitionTime: fakeNow,
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},
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},
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},
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},
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},
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},
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// Node created recently, without status.
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// Expect no action from node controller (within startup grace period).
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: fakeNow,
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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expectedRequestCount: 1, // List
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expectedNodes: nil,
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},
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// Node created long time ago, with status updated by kubelet exceeds grace period.
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// Expect Unknown status posted from node controller.
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{
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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Status: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionTrue,
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// Node status hasn't been updated for 1hr.
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceCPU): resource.MustParse("10"),
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api.ResourceName(api.ResourceMemory): resource.MustParse("10G"),
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},
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},
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Spec: api.NodeSpec{
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ExternalID: "node0",
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},
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},
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},
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Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
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},
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expectedRequestCount: 3, // (List+)List+Update
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timeToPass: time.Hour,
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newNodeStatus: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionTrue,
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// Node status hasn't been updated for 1hr.
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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},
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},
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceCPU): resource.MustParse("10"),
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api.ResourceName(api.ResourceMemory): resource.MustParse("10G"),
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},
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},
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expectedNodes: []*api.Node{
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{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
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},
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Status: api.NodeStatus{
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Conditions: []api.NodeCondition{
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{
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Type: api.NodeReady,
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Status: api.ConditionUnknown,
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Reason: fmt.Sprintf("Kubelet stopped posting node status."),
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LastHeartbeatTime: util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC),
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LastTransitionTime: util.Time{util.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC).Add(time.Hour)},
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},
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},
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Capacity: api.ResourceList{
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api.ResourceName(api.ResourceCPU): resource.MustParse("10"),
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api.ResourceName(api.ResourceMemory): resource.MustParse("10G"),
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},
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},
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Spec: api.NodeSpec{
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ExternalID: "node0",
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},
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},
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},
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},
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// Node created long time ago, with status updated recently.
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|
// Expect no action from node controller (within monitor grace period).
|
|
{
|
|
fakeNodeHandler: &FakeNodeHandler{
|
|
Existing: []*api.Node{
|
|
{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "node0",
|
|
CreationTimestamp: util.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
|
|
},
|
|
Status: api.NodeStatus{
|
|
Conditions: []api.NodeCondition{
|
|
{
|
|
Type: api.NodeReady,
|
|
Status: api.ConditionTrue,
|
|
// Node status has just been updated.
|
|
LastHeartbeatTime: fakeNow,
|
|
LastTransitionTime: fakeNow,
|
|
},
|
|
},
|
|
Capacity: api.ResourceList{
|
|
api.ResourceName(api.ResourceCPU): resource.MustParse("10"),
|
|
api.ResourceName(api.ResourceMemory): resource.MustParse("10G"),
|
|
},
|
|
},
|
|
Spec: api.NodeSpec{
|
|
ExternalID: "node0",
|
|
},
|
|
},
|
|
},
|
|
Fake: testclient.NewSimpleFake(&api.PodList{Items: []api.Pod{*newPod("pod0", "node0")}}),
|
|
},
|
|
expectedRequestCount: 1, // List
|
|
expectedNodes: nil,
|
|
},
|
|
}
|
|
|
|
for _, item := range table {
|
|
nodeController := NewNodeController(nil, item.fakeNodeHandler, 5*time.Minute, NewPodEvictor(util.NewFakeRateLimiter()),
|
|
testNodeMonitorGracePeriod, testNodeStartupGracePeriod, testNodeMonitorPeriod, nil, false)
|
|
nodeController.now = func() util.Time { return fakeNow }
|
|
if err := nodeController.monitorNodeStatus(); err != nil {
|
|
t.Errorf("unexpected error: %v", err)
|
|
}
|
|
if item.timeToPass > 0 {
|
|
nodeController.now = func() util.Time { return util.Time{Time: fakeNow.Add(item.timeToPass)} }
|
|
item.fakeNodeHandler.Existing[0].Status = item.newNodeStatus
|
|
if err := nodeController.monitorNodeStatus(); err != nil {
|
|
t.Errorf("unexpected error: %v", err)
|
|
}
|
|
}
|
|
if item.expectedRequestCount != item.fakeNodeHandler.RequestCount {
|
|
t.Errorf("expected %v call, but got %v.", item.expectedRequestCount, item.fakeNodeHandler.RequestCount)
|
|
}
|
|
if len(item.fakeNodeHandler.UpdatedNodes) > 0 && !api.Semantic.DeepEqual(item.expectedNodes, item.fakeNodeHandler.UpdatedNodes) {
|
|
t.Errorf("expected nodes %+v, got %+v", item.expectedNodes[0],
|
|
item.fakeNodeHandler.UpdatedNodes[0])
|
|
}
|
|
}
|
|
}
|
|
|
|
func newNode(name string) *api.Node {
|
|
return &api.Node{
|
|
ObjectMeta: api.ObjectMeta{Name: name},
|
|
Spec: api.NodeSpec{
|
|
ExternalID: name,
|
|
},
|
|
Status: api.NodeStatus{
|
|
Capacity: api.ResourceList{
|
|
api.ResourceName(api.ResourceCPU): resource.MustParse("10"),
|
|
api.ResourceName(api.ResourceMemory): resource.MustParse("10G"),
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
func newPod(name, host string) *api.Pod {
|
|
return &api.Pod{ObjectMeta: api.ObjectMeta{Name: name}, Spec: api.PodSpec{NodeName: host}}
|
|
}
|
|
|
|
func sortedNodeNames(nodes []*api.Node) []string {
|
|
nodeNames := []string{}
|
|
for _, node := range nodes {
|
|
nodeNames = append(nodeNames, node.Name)
|
|
}
|
|
sort.Strings(nodeNames)
|
|
return nodeNames
|
|
}
|
|
|
|
func sortedNodeAddresses(nodes []*api.Node) []string {
|
|
nodeAddresses := []string{}
|
|
for _, node := range nodes {
|
|
for _, addr := range node.Status.Addresses {
|
|
nodeAddresses = append(nodeAddresses, addr.Address)
|
|
}
|
|
}
|
|
sort.Strings(nodeAddresses)
|
|
return nodeAddresses
|
|
}
|
|
|
|
func sortedNodeExternalIDs(nodes []*api.Node) []string {
|
|
nodeExternalIDs := []string{}
|
|
for _, node := range nodes {
|
|
nodeExternalIDs = append(nodeExternalIDs, node.Spec.ExternalID)
|
|
}
|
|
sort.Strings(nodeExternalIDs)
|
|
return nodeExternalIDs
|
|
}
|
|
|
|
func contains(node *api.Node, nodes []*api.Node) bool {
|
|
for i := 0; i < len(nodes); i++ {
|
|
if node.Name == nodes[i].Name {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|