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520 lines
18 KiB
Go
520 lines
18 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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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 scheduler
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import (
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"context"
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"reflect"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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appsv1 "k8s.io/api/apps/v1"
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batchv1 "k8s.io/api/batch/v1"
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v1 "k8s.io/api/core/v1"
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storagev1 "k8s.io/api/storage/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/client-go/dynamic/dynamicinformer"
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dyfake "k8s.io/client-go/dynamic/fake"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes/fake"
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"k8s.io/kubernetes/pkg/scheduler/framework"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodeaffinity"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodename"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodeports"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/noderesources"
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"k8s.io/kubernetes/pkg/scheduler/internal/cache"
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"k8s.io/kubernetes/pkg/scheduler/internal/queue"
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st "k8s.io/kubernetes/pkg/scheduler/testing"
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)
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func TestNodeAllocatableChanged(t *testing.T) {
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newQuantity := func(value int64) resource.Quantity {
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return *resource.NewQuantity(value, resource.BinarySI)
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}
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for _, test := range []struct {
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Name string
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Changed bool
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OldAllocatable v1.ResourceList
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NewAllocatable v1.ResourceList
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}{
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{
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Name: "no allocatable resources changed",
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Changed: false,
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OldAllocatable: v1.ResourceList{v1.ResourceMemory: newQuantity(1024)},
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NewAllocatable: v1.ResourceList{v1.ResourceMemory: newQuantity(1024)},
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},
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{
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Name: "new node has more allocatable resources",
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Changed: true,
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OldAllocatable: v1.ResourceList{v1.ResourceMemory: newQuantity(1024)},
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NewAllocatable: v1.ResourceList{v1.ResourceMemory: newQuantity(1024), v1.ResourceStorage: newQuantity(1024)},
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},
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} {
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t.Run(test.Name, func(t *testing.T) {
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oldNode := &v1.Node{Status: v1.NodeStatus{Allocatable: test.OldAllocatable}}
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newNode := &v1.Node{Status: v1.NodeStatus{Allocatable: test.NewAllocatable}}
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changed := nodeAllocatableChanged(newNode, oldNode)
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if changed != test.Changed {
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t.Errorf("nodeAllocatableChanged should be %t, got %t", test.Changed, changed)
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}
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})
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}
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}
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func TestNodeLabelsChanged(t *testing.T) {
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for _, test := range []struct {
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Name string
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Changed bool
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OldLabels map[string]string
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NewLabels map[string]string
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}{
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{
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Name: "no labels changed",
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Changed: false,
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OldLabels: map[string]string{"foo": "bar"},
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NewLabels: map[string]string{"foo": "bar"},
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},
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// Labels changed.
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{
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Name: "new node has more labels",
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Changed: true,
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OldLabels: map[string]string{"foo": "bar"},
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NewLabels: map[string]string{"foo": "bar", "test": "value"},
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},
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} {
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t.Run(test.Name, func(t *testing.T) {
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oldNode := &v1.Node{ObjectMeta: metav1.ObjectMeta{Labels: test.OldLabels}}
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newNode := &v1.Node{ObjectMeta: metav1.ObjectMeta{Labels: test.NewLabels}}
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changed := nodeLabelsChanged(newNode, oldNode)
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if changed != test.Changed {
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t.Errorf("Test case %q failed: should be %t, got %t", test.Name, test.Changed, changed)
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}
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})
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}
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}
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func TestNodeTaintsChanged(t *testing.T) {
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for _, test := range []struct {
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Name string
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Changed bool
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OldTaints []v1.Taint
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NewTaints []v1.Taint
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}{
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{
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Name: "no taint changed",
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Changed: false,
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OldTaints: []v1.Taint{{Key: "key", Value: "value"}},
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NewTaints: []v1.Taint{{Key: "key", Value: "value"}},
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},
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{
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Name: "taint value changed",
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Changed: true,
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OldTaints: []v1.Taint{{Key: "key", Value: "value1"}},
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NewTaints: []v1.Taint{{Key: "key", Value: "value2"}},
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},
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} {
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t.Run(test.Name, func(t *testing.T) {
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oldNode := &v1.Node{Spec: v1.NodeSpec{Taints: test.OldTaints}}
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newNode := &v1.Node{Spec: v1.NodeSpec{Taints: test.NewTaints}}
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changed := nodeTaintsChanged(newNode, oldNode)
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if changed != test.Changed {
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t.Errorf("Test case %q failed: should be %t, not %t", test.Name, test.Changed, changed)
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}
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})
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}
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}
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func TestNodeConditionsChanged(t *testing.T) {
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nodeConditionType := reflect.TypeOf(v1.NodeCondition{})
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if nodeConditionType.NumField() != 6 {
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t.Errorf("NodeCondition type has changed. The nodeConditionsChanged() function must be reevaluated.")
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}
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for _, test := range []struct {
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Name string
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Changed bool
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OldConditions []v1.NodeCondition
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NewConditions []v1.NodeCondition
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}{
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{
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Name: "no condition changed",
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Changed: false,
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OldConditions: []v1.NodeCondition{{Type: v1.NodeDiskPressure, Status: v1.ConditionTrue}},
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NewConditions: []v1.NodeCondition{{Type: v1.NodeDiskPressure, Status: v1.ConditionTrue}},
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},
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{
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Name: "only LastHeartbeatTime changed",
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Changed: false,
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OldConditions: []v1.NodeCondition{{Type: v1.NodeDiskPressure, Status: v1.ConditionTrue, LastHeartbeatTime: metav1.Unix(1, 0)}},
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NewConditions: []v1.NodeCondition{{Type: v1.NodeDiskPressure, Status: v1.ConditionTrue, LastHeartbeatTime: metav1.Unix(2, 0)}},
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},
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{
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Name: "new node has more healthy conditions",
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Changed: true,
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OldConditions: []v1.NodeCondition{},
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NewConditions: []v1.NodeCondition{{Type: v1.NodeReady, Status: v1.ConditionTrue}},
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},
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{
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Name: "new node has less unhealthy conditions",
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Changed: true,
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OldConditions: []v1.NodeCondition{{Type: v1.NodeDiskPressure, Status: v1.ConditionTrue}},
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NewConditions: []v1.NodeCondition{},
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},
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{
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Name: "condition status changed",
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Changed: true,
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OldConditions: []v1.NodeCondition{{Type: v1.NodeReady, Status: v1.ConditionFalse}},
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NewConditions: []v1.NodeCondition{{Type: v1.NodeReady, Status: v1.ConditionTrue}},
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},
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} {
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t.Run(test.Name, func(t *testing.T) {
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oldNode := &v1.Node{Status: v1.NodeStatus{Conditions: test.OldConditions}}
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newNode := &v1.Node{Status: v1.NodeStatus{Conditions: test.NewConditions}}
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changed := nodeConditionsChanged(newNode, oldNode)
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if changed != test.Changed {
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t.Errorf("Test case %q failed: should be %t, got %t", test.Name, test.Changed, changed)
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}
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})
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}
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}
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func TestUpdatePodInCache(t *testing.T) {
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ttl := 10 * time.Second
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nodeName := "node"
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tests := []struct {
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name string
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oldObj interface{}
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newObj interface{}
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}{
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{
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name: "pod updated with the same UID",
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oldObj: withPodName(podWithPort("oldUID", nodeName, 80), "pod"),
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newObj: withPodName(podWithPort("oldUID", nodeName, 8080), "pod"),
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},
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{
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name: "pod updated with different UIDs",
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oldObj: withPodName(podWithPort("oldUID", nodeName, 80), "pod"),
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newObj: withPodName(podWithPort("newUID", nodeName, 8080), "pod"),
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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sched := &Scheduler{
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Cache: cache.New(ttl, ctx.Done()),
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SchedulingQueue: queue.NewTestQueue(ctx, nil),
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}
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sched.addPodToCache(tt.oldObj)
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sched.updatePodInCache(tt.oldObj, tt.newObj)
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if tt.oldObj.(*v1.Pod).UID != tt.newObj.(*v1.Pod).UID {
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if pod, err := sched.Cache.GetPod(tt.oldObj.(*v1.Pod)); err == nil {
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t.Errorf("Get pod UID %v from cache but it should not happen", pod.UID)
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}
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}
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pod, err := sched.Cache.GetPod(tt.newObj.(*v1.Pod))
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if err != nil {
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t.Errorf("Failed to get pod from scheduler: %v", err)
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}
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if pod.UID != tt.newObj.(*v1.Pod).UID {
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t.Errorf("Want pod UID %v, got %v", tt.newObj.(*v1.Pod).UID, pod.UID)
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}
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})
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}
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}
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func withPodName(pod *v1.Pod, name string) *v1.Pod {
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pod.Name = name
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return pod
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}
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func TestPreCheckForNode(t *testing.T) {
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cpu4 := map[v1.ResourceName]string{v1.ResourceCPU: "4"}
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cpu8 := map[v1.ResourceName]string{v1.ResourceCPU: "8"}
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cpu16 := map[v1.ResourceName]string{v1.ResourceCPU: "16"}
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tests := []struct {
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name string
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nodeFn func() *v1.Node
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existingPods, pods []*v1.Pod
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want []bool
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}{
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{
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name: "regular node, pods with a single constraint",
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nodeFn: func() *v1.Node {
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return st.MakeNode().Name("fake-node").Label("hostname", "fake-node").Capacity(cpu8).Obj()
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},
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existingPods: []*v1.Pod{
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st.MakePod().Name("p").HostPort(80).Obj(),
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},
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pods: []*v1.Pod{
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st.MakePod().Name("p1").Req(cpu4).Obj(),
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st.MakePod().Name("p2").Req(cpu16).Obj(),
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st.MakePod().Name("p3").Req(cpu4).Req(cpu8).Obj(),
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st.MakePod().Name("p4").NodeAffinityIn("hostname", []string{"fake-node"}).Obj(),
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st.MakePod().Name("p5").NodeAffinityNotIn("hostname", []string{"fake-node"}).Obj(),
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st.MakePod().Name("p6").Obj(),
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st.MakePod().Name("p7").Node("invalid-node").Obj(),
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st.MakePod().Name("p8").HostPort(8080).Obj(),
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st.MakePod().Name("p9").HostPort(80).Obj(),
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},
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want: []bool{true, false, false, true, false, true, false, true, false},
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},
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{
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name: "tainted node, pods with a single constraint",
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nodeFn: func() *v1.Node {
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node := st.MakeNode().Name("fake-node").Obj()
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node.Spec.Taints = []v1.Taint{
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{Key: "foo", Effect: v1.TaintEffectNoSchedule},
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{Key: "bar", Effect: v1.TaintEffectPreferNoSchedule},
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}
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return node
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},
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pods: []*v1.Pod{
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st.MakePod().Name("p1").Obj(),
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st.MakePod().Name("p2").Toleration("foo").Obj(),
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st.MakePod().Name("p3").Toleration("bar").Obj(),
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st.MakePod().Name("p4").Toleration("bar").Toleration("foo").Obj(),
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},
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want: []bool{false, true, false, true},
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},
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{
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name: "regular node, pods with multiple constraints",
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nodeFn: func() *v1.Node {
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return st.MakeNode().Name("fake-node").Label("hostname", "fake-node").Capacity(cpu8).Obj()
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},
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existingPods: []*v1.Pod{
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st.MakePod().Name("p").HostPort(80).Obj(),
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},
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pods: []*v1.Pod{
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st.MakePod().Name("p1").Req(cpu4).NodeAffinityNotIn("hostname", []string{"fake-node"}).Obj(),
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st.MakePod().Name("p2").Req(cpu16).NodeAffinityIn("hostname", []string{"fake-node"}).Obj(),
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st.MakePod().Name("p3").Req(cpu8).NodeAffinityIn("hostname", []string{"fake-node"}).Obj(),
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st.MakePod().Name("p4").HostPort(8080).Node("invalid-node").Obj(),
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st.MakePod().Name("p5").Req(cpu4).NodeAffinityIn("hostname", []string{"fake-node"}).HostPort(80).Obj(),
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},
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want: []bool{false, false, true, false, false},
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},
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{
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name: "tainted node, pods with multiple constraints",
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nodeFn: func() *v1.Node {
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node := st.MakeNode().Name("fake-node").Label("hostname", "fake-node").Capacity(cpu8).Obj()
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node.Spec.Taints = []v1.Taint{
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{Key: "foo", Effect: v1.TaintEffectNoSchedule},
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{Key: "bar", Effect: v1.TaintEffectPreferNoSchedule},
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}
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return node
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},
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pods: []*v1.Pod{
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st.MakePod().Name("p1").Req(cpu4).Toleration("bar").Obj(),
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st.MakePod().Name("p2").Req(cpu4).Toleration("bar").Toleration("foo").Obj(),
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st.MakePod().Name("p3").Req(cpu16).Toleration("foo").Obj(),
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st.MakePod().Name("p3").Req(cpu16).Toleration("bar").Obj(),
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},
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want: []bool{false, true, false, false},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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nodeInfo := framework.NewNodeInfo(tt.existingPods...)
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nodeInfo.SetNode(tt.nodeFn())
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preCheckFn := preCheckForNode(nodeInfo)
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var got []bool
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for _, pod := range tt.pods {
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got = append(got, preCheckFn(pod))
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}
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if diff := cmp.Diff(tt.want, got); diff != "" {
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t.Errorf("Unexpected diff (-want, +got):\n%s", diff)
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}
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})
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}
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}
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// test for informers of resources we care about is registered
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func TestAddAllEventHandlers(t *testing.T) {
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tests := []struct {
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name string
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gvkMap map[framework.GVK]framework.ActionType
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expectStaticInformers map[reflect.Type]bool
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expectDynamicInformers map[schema.GroupVersionResource]bool
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}{
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{
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name: "default handlers in framework",
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gvkMap: map[framework.GVK]framework.ActionType{},
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expectStaticInformers: map[reflect.Type]bool{
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reflect.TypeOf(&v1.Pod{}): true,
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reflect.TypeOf(&v1.Node{}): true,
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reflect.TypeOf(&v1.Namespace{}): true,
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},
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expectDynamicInformers: map[schema.GroupVersionResource]bool{},
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},
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{
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name: "add GVKs handlers defined in framework dynamically",
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gvkMap: map[framework.GVK]framework.ActionType{
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"Pod": framework.Add | framework.Delete,
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"PersistentVolume": framework.Delete,
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"storage.k8s.io/CSIStorageCapacity": framework.Update,
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},
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expectStaticInformers: map[reflect.Type]bool{
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reflect.TypeOf(&v1.Pod{}): true,
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reflect.TypeOf(&v1.Node{}): true,
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reflect.TypeOf(&v1.Namespace{}): true,
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reflect.TypeOf(&v1.PersistentVolume{}): true,
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reflect.TypeOf(&storagev1.CSIStorageCapacity{}): true,
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},
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expectDynamicInformers: map[schema.GroupVersionResource]bool{},
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},
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{
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name: "add GVKs handlers defined in plugins dynamically",
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gvkMap: map[framework.GVK]framework.ActionType{
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"daemonsets.v1.apps": framework.Add | framework.Delete,
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"cronjobs.v1.batch": framework.Delete,
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},
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expectStaticInformers: map[reflect.Type]bool{
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reflect.TypeOf(&v1.Pod{}): true,
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reflect.TypeOf(&v1.Node{}): true,
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reflect.TypeOf(&v1.Namespace{}): true,
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},
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expectDynamicInformers: map[schema.GroupVersionResource]bool{
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{Group: "apps", Version: "v1", Resource: "daemonsets"}: true,
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{Group: "batch", Version: "v1", Resource: "cronjobs"}: true,
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},
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},
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{
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name: "add GVKs handlers defined in plugins dynamically, with one illegal GVK form",
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gvkMap: map[framework.GVK]framework.ActionType{
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"daemonsets.v1.apps": framework.Add | framework.Delete,
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"custommetrics.v1beta1": framework.Update,
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},
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expectStaticInformers: map[reflect.Type]bool{
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reflect.TypeOf(&v1.Pod{}): true,
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reflect.TypeOf(&v1.Node{}): true,
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reflect.TypeOf(&v1.Namespace{}): true,
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},
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expectDynamicInformers: map[schema.GroupVersionResource]bool{
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{Group: "apps", Version: "v1", Resource: "daemonsets"}: true,
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},
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},
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}
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scheme := runtime.NewScheme()
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var localSchemeBuilder = runtime.SchemeBuilder{
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appsv1.AddToScheme,
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batchv1.AddToScheme,
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}
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localSchemeBuilder.AddToScheme(scheme)
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|
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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informerFactory := informers.NewSharedInformerFactory(fake.NewSimpleClientset(), 0)
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schedulingQueue := queue.NewTestQueueWithInformerFactory(ctx, nil, informerFactory)
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testSched := Scheduler{
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StopEverything: ctx.Done(),
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SchedulingQueue: schedulingQueue,
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}
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dynclient := dyfake.NewSimpleDynamicClient(scheme)
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dynInformerFactory := dynamicinformer.NewDynamicSharedInformerFactory(dynclient, 0)
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addAllEventHandlers(&testSched, informerFactory, dynInformerFactory, tt.gvkMap)
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informerFactory.Start(testSched.StopEverything)
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dynInformerFactory.Start(testSched.StopEverything)
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staticInformers := informerFactory.WaitForCacheSync(testSched.StopEverything)
|
|
dynamicInformers := dynInformerFactory.WaitForCacheSync(testSched.StopEverything)
|
|
|
|
if diff := cmp.Diff(tt.expectStaticInformers, staticInformers); diff != "" {
|
|
t.Errorf("Unexpected diff (-want, +got):\n%s", diff)
|
|
}
|
|
if diff := cmp.Diff(tt.expectDynamicInformers, dynamicInformers); diff != "" {
|
|
t.Errorf("Unexpected diff (-want, +got):\n%s", diff)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestAdmissionCheck(t *testing.T) {
|
|
nodeaffinityError := AdmissionResult{Name: nodeaffinity.Name, Reason: nodeaffinity.ErrReasonPod}
|
|
nodenameError := AdmissionResult{Name: nodename.Name, Reason: nodename.ErrReason}
|
|
nodeportsError := AdmissionResult{Name: nodeports.Name, Reason: nodeports.ErrReason}
|
|
podOverheadError := AdmissionResult{InsufficientResource: &noderesources.InsufficientResource{ResourceName: v1.ResourceCPU, Reason: "Insufficient cpu", Requested: 2000, Used: 7000, Capacity: 8000}}
|
|
cpu := map[v1.ResourceName]string{v1.ResourceCPU: "8"}
|
|
tests := []struct {
|
|
name string
|
|
node *v1.Node
|
|
existingPods []*v1.Pod
|
|
pod *v1.Pod
|
|
wantAdmissionResults [][]AdmissionResult
|
|
}{
|
|
{
|
|
name: "check nodeAffinity and nodeports, nodeAffinity need fail quickly if includeAllFailures is false",
|
|
node: st.MakeNode().Name("fake-node").Label("foo", "bar").Obj(),
|
|
pod: st.MakePod().Name("pod2").HostPort(80).NodeSelector(map[string]string{"foo": "bar1"}).Obj(),
|
|
existingPods: []*v1.Pod{
|
|
st.MakePod().Name("pod1").HostPort(80).Obj(),
|
|
},
|
|
wantAdmissionResults: [][]AdmissionResult{{nodeaffinityError, nodeportsError}, {nodeaffinityError}},
|
|
},
|
|
{
|
|
name: "check PodOverhead and nodeAffinity, PodOverhead need fail quickly if includeAllFailures is false",
|
|
node: st.MakeNode().Name("fake-node").Label("foo", "bar").Capacity(cpu).Obj(),
|
|
pod: st.MakePod().Name("pod2").Container("c").Overhead(v1.ResourceList{v1.ResourceCPU: resource.MustParse("1")}).Req(map[v1.ResourceName]string{v1.ResourceCPU: "1"}).NodeSelector(map[string]string{"foo": "bar1"}).Obj(),
|
|
existingPods: []*v1.Pod{
|
|
st.MakePod().Name("pod1").Req(map[v1.ResourceName]string{v1.ResourceCPU: "7"}).Node("fake-node").Obj(),
|
|
},
|
|
wantAdmissionResults: [][]AdmissionResult{{podOverheadError, nodeaffinityError}, {podOverheadError}},
|
|
},
|
|
{
|
|
name: "check nodename and nodeports, nodename need fail quickly if includeAllFailures is false",
|
|
node: st.MakeNode().Name("fake-node").Obj(),
|
|
pod: st.MakePod().Name("pod2").HostPort(80).Node("fake-node1").Obj(),
|
|
existingPods: []*v1.Pod{
|
|
st.MakePod().Name("pod1").HostPort(80).Node("fake-node").Obj(),
|
|
},
|
|
wantAdmissionResults: [][]AdmissionResult{{nodenameError, nodeportsError}, {nodenameError}},
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
nodeInfo := framework.NewNodeInfo(tt.existingPods...)
|
|
nodeInfo.SetNode(tt.node)
|
|
|
|
flags := []bool{true, false}
|
|
for i := range flags {
|
|
admissionResults := AdmissionCheck(tt.pod, nodeInfo, flags[i])
|
|
|
|
if diff := cmp.Diff(tt.wantAdmissionResults[i], admissionResults); diff != "" {
|
|
t.Errorf("Unexpected admissionResults (-want, +got):\n%s", diff)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}
|