mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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7f179bf936
- only one extender can support the bind method - if an extender supports bind, scheduler delegates the pod binding to the extender
335 lines
9.7 KiB
Go
335 lines
9.7 KiB
Go
/*
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Copyright 2015 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 core
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import (
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"fmt"
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"testing"
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"time"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm"
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schedulerapi "k8s.io/kubernetes/plugin/pkg/scheduler/api"
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"k8s.io/kubernetes/plugin/pkg/scheduler/schedulercache"
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schedulertesting "k8s.io/kubernetes/plugin/pkg/scheduler/testing"
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)
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type fitPredicate func(pod *v1.Pod, node *v1.Node) (bool, error)
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type priorityFunc func(pod *v1.Pod, nodes []*v1.Node) (*schedulerapi.HostPriorityList, error)
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type priorityConfig struct {
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function priorityFunc
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weight int
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}
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func errorPredicateExtender(pod *v1.Pod, node *v1.Node) (bool, error) {
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return false, fmt.Errorf("Some error")
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}
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func falsePredicateExtender(pod *v1.Pod, node *v1.Node) (bool, error) {
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return false, nil
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}
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func truePredicateExtender(pod *v1.Pod, node *v1.Node) (bool, error) {
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return true, nil
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}
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func machine1PredicateExtender(pod *v1.Pod, node *v1.Node) (bool, error) {
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if node.Name == "machine1" {
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return true, nil
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}
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return false, nil
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}
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func machine2PredicateExtender(pod *v1.Pod, node *v1.Node) (bool, error) {
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if node.Name == "machine2" {
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return true, nil
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}
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return false, nil
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}
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func errorPrioritizerExtender(pod *v1.Pod, nodes []*v1.Node) (*schedulerapi.HostPriorityList, error) {
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return &schedulerapi.HostPriorityList{}, fmt.Errorf("Some error")
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}
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func machine1PrioritizerExtender(pod *v1.Pod, nodes []*v1.Node) (*schedulerapi.HostPriorityList, error) {
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result := schedulerapi.HostPriorityList{}
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for _, node := range nodes {
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score := 1
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if node.Name == "machine1" {
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score = 10
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}
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result = append(result, schedulerapi.HostPriority{Host: node.Name, Score: score})
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}
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return &result, nil
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}
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func machine2PrioritizerExtender(pod *v1.Pod, nodes []*v1.Node) (*schedulerapi.HostPriorityList, error) {
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result := schedulerapi.HostPriorityList{}
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for _, node := range nodes {
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score := 1
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if node.Name == "machine2" {
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score = 10
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}
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result = append(result, schedulerapi.HostPriority{Host: node.Name, Score: score})
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}
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return &result, nil
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}
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func machine2Prioritizer(_ *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error) {
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result := []schedulerapi.HostPriority{}
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for _, node := range nodes {
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score := 1
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if node.Name == "machine2" {
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score = 10
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}
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result = append(result, schedulerapi.HostPriority{Host: node.Name, Score: score})
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}
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return result, nil
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}
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type FakeExtender struct {
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predicates []fitPredicate
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prioritizers []priorityConfig
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weight int
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nodeCacheCapable bool
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filteredNodes []*v1.Node
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}
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func (f *FakeExtender) Filter(pod *v1.Pod, nodes []*v1.Node, nodeNameToInfo map[string]*schedulercache.NodeInfo) ([]*v1.Node, schedulerapi.FailedNodesMap, error) {
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filtered := []*v1.Node{}
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failedNodesMap := schedulerapi.FailedNodesMap{}
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for _, node := range nodes {
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fits := true
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for _, predicate := range f.predicates {
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fit, err := predicate(pod, node)
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if err != nil {
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return []*v1.Node{}, schedulerapi.FailedNodesMap{}, err
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}
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if !fit {
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fits = false
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break
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}
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}
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if fits {
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filtered = append(filtered, node)
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} else {
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failedNodesMap[node.Name] = "FakeExtender failed"
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}
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}
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f.filteredNodes = filtered
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if f.nodeCacheCapable {
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return filtered, failedNodesMap, nil
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}
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return filtered, failedNodesMap, nil
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}
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func (f *FakeExtender) Prioritize(pod *v1.Pod, nodes []*v1.Node) (*schedulerapi.HostPriorityList, int, error) {
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result := schedulerapi.HostPriorityList{}
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combinedScores := map[string]int{}
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for _, prioritizer := range f.prioritizers {
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weight := prioritizer.weight
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if weight == 0 {
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continue
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}
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priorityFunc := prioritizer.function
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prioritizedList, err := priorityFunc(pod, nodes)
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if err != nil {
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return &schedulerapi.HostPriorityList{}, 0, err
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}
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for _, hostEntry := range *prioritizedList {
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combinedScores[hostEntry.Host] += hostEntry.Score * weight
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}
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}
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for host, score := range combinedScores {
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result = append(result, schedulerapi.HostPriority{Host: host, Score: score})
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}
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return &result, f.weight, nil
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}
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func (f *FakeExtender) Bind(binding *v1.Binding) error {
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if len(f.filteredNodes) != 0 {
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for _, node := range f.filteredNodes {
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if node.Name == binding.Target.Name {
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f.filteredNodes = nil
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return nil
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}
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}
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err := fmt.Errorf("Node %v not in filtered nodes %v", binding.Target.Name, f.filteredNodes)
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f.filteredNodes = nil
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return err
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}
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return nil
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}
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func (f *FakeExtender) IsBinder() bool {
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return true
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}
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func TestGenericSchedulerWithExtenders(t *testing.T) {
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tests := []struct {
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name string
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predicates map[string]algorithm.FitPredicate
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prioritizers []algorithm.PriorityConfig
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extenders []FakeExtender
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extenderPredicates []fitPredicate
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extenderPrioritizers []priorityConfig
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nodes []string
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expectedHost string
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expectsErr bool
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}{
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{
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predicates: map[string]algorithm.FitPredicate{"true": truePredicate},
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prioritizers: []algorithm.PriorityConfig{{Map: EqualPriorityMap, Weight: 1}},
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extenders: []FakeExtender{
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{
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predicates: []fitPredicate{truePredicateExtender},
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},
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{
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predicates: []fitPredicate{errorPredicateExtender},
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},
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},
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nodes: []string{"machine1", "machine2"},
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expectsErr: true,
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name: "test 1",
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},
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{
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predicates: map[string]algorithm.FitPredicate{"true": truePredicate},
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prioritizers: []algorithm.PriorityConfig{{Map: EqualPriorityMap, Weight: 1}},
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extenders: []FakeExtender{
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{
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predicates: []fitPredicate{truePredicateExtender},
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},
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{
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predicates: []fitPredicate{falsePredicateExtender},
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},
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},
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nodes: []string{"machine1", "machine2"},
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expectsErr: true,
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name: "test 2",
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},
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{
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predicates: map[string]algorithm.FitPredicate{"true": truePredicate},
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prioritizers: []algorithm.PriorityConfig{{Map: EqualPriorityMap, Weight: 1}},
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extenders: []FakeExtender{
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{
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predicates: []fitPredicate{truePredicateExtender},
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},
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{
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predicates: []fitPredicate{machine1PredicateExtender},
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},
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},
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nodes: []string{"machine1", "machine2"},
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expectedHost: "machine1",
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name: "test 3",
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},
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{
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predicates: map[string]algorithm.FitPredicate{"true": truePredicate},
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prioritizers: []algorithm.PriorityConfig{{Map: EqualPriorityMap, Weight: 1}},
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extenders: []FakeExtender{
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{
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predicates: []fitPredicate{machine2PredicateExtender},
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},
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{
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predicates: []fitPredicate{machine1PredicateExtender},
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},
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},
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nodes: []string{"machine1", "machine2"},
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expectsErr: true,
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name: "test 4",
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},
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{
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predicates: map[string]algorithm.FitPredicate{"true": truePredicate},
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prioritizers: []algorithm.PriorityConfig{{Map: EqualPriorityMap, Weight: 1}},
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extenders: []FakeExtender{
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{
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predicates: []fitPredicate{truePredicateExtender},
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prioritizers: []priorityConfig{{errorPrioritizerExtender, 10}},
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weight: 1,
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},
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},
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nodes: []string{"machine1"},
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expectedHost: "machine1",
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name: "test 5",
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},
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{
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predicates: map[string]algorithm.FitPredicate{"true": truePredicate},
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prioritizers: []algorithm.PriorityConfig{{Map: EqualPriorityMap, Weight: 1}},
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extenders: []FakeExtender{
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{
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predicates: []fitPredicate{truePredicateExtender},
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prioritizers: []priorityConfig{{machine1PrioritizerExtender, 10}},
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weight: 1,
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},
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{
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predicates: []fitPredicate{truePredicateExtender},
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prioritizers: []priorityConfig{{machine2PrioritizerExtender, 10}},
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weight: 5,
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},
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},
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nodes: []string{"machine1", "machine2"},
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expectedHost: "machine2",
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name: "test 6",
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},
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{
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predicates: map[string]algorithm.FitPredicate{"true": truePredicate},
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prioritizers: []algorithm.PriorityConfig{{Function: machine2Prioritizer, Weight: 20}},
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extenders: []FakeExtender{
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{
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predicates: []fitPredicate{truePredicateExtender},
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prioritizers: []priorityConfig{{machine1PrioritizerExtender, 10}},
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weight: 1,
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},
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},
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nodes: []string{"machine1", "machine2"},
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expectedHost: "machine2", // machine2 has higher score
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name: "test 7",
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},
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}
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for _, test := range tests {
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extenders := []algorithm.SchedulerExtender{}
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for ii := range test.extenders {
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extenders = append(extenders, &test.extenders[ii])
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}
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cache := schedulercache.New(time.Duration(0), wait.NeverStop)
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for _, name := range test.nodes {
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cache.AddNode(&v1.Node{ObjectMeta: metav1.ObjectMeta{Name: name}})
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}
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scheduler := NewGenericScheduler(
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cache, nil, test.predicates, algorithm.EmptyMetadataProducer, test.prioritizers, algorithm.EmptyMetadataProducer, extenders)
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podIgnored := &v1.Pod{}
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machine, err := scheduler.Schedule(podIgnored, schedulertesting.FakeNodeLister(makeNodeList(test.nodes)))
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if test.expectsErr {
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if err == nil {
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t.Errorf("Unexpected non-error for %s, machine %s", test.name, machine)
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}
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} else {
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if err != nil {
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t.Errorf("Unexpected error: %v", err)
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continue
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}
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if test.expectedHost != machine {
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t.Errorf("Failed : %s, Expected: %s, Saw: %s", test.name, test.expectedHost, machine)
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}
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}
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}
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}
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