mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-10-30 17:58:14 +00:00
406 lines
12 KiB
Go
406 lines
12 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package scheduler
|
|
|
|
// This file tests scheduler extender.
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"net/http"
|
|
"net/http/httptest"
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
|
|
"k8s.io/apimachinery/pkg/api/resource"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
|
|
clientv1 "k8s.io/client-go/pkg/api/v1"
|
|
restclient "k8s.io/client-go/rest"
|
|
"k8s.io/client-go/tools/record"
|
|
"k8s.io/kubernetes/pkg/api"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
|
|
informers "k8s.io/kubernetes/pkg/client/informers/informers_generated/externalversions"
|
|
"k8s.io/kubernetes/plugin/pkg/scheduler"
|
|
_ "k8s.io/kubernetes/plugin/pkg/scheduler/algorithmprovider"
|
|
schedulerapi "k8s.io/kubernetes/plugin/pkg/scheduler/api"
|
|
"k8s.io/kubernetes/plugin/pkg/scheduler/factory"
|
|
e2e "k8s.io/kubernetes/test/e2e/framework"
|
|
"k8s.io/kubernetes/test/integration/framework"
|
|
)
|
|
|
|
const (
|
|
filter = "filter"
|
|
prioritize = "prioritize"
|
|
)
|
|
|
|
type fitPredicate func(pod *v1.Pod, node *v1.Node) (bool, error)
|
|
type priorityFunc func(pod *v1.Pod, nodes *v1.NodeList) (*schedulerapi.HostPriorityList, error)
|
|
|
|
type priorityConfig struct {
|
|
function priorityFunc
|
|
weight int
|
|
}
|
|
|
|
type Extender struct {
|
|
name string
|
|
predicates []fitPredicate
|
|
prioritizers []priorityConfig
|
|
nodeCacheCapable bool
|
|
}
|
|
|
|
func (e *Extender) serveHTTP(t *testing.T, w http.ResponseWriter, req *http.Request) {
|
|
var args schedulerapi.ExtenderArgs
|
|
|
|
decoder := json.NewDecoder(req.Body)
|
|
defer req.Body.Close()
|
|
|
|
if err := decoder.Decode(&args); err != nil {
|
|
http.Error(w, "Decode error", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
encoder := json.NewEncoder(w)
|
|
|
|
if strings.Contains(req.URL.Path, filter) {
|
|
resp := &schedulerapi.ExtenderFilterResult{}
|
|
resp, err := e.Filter(&args)
|
|
if err != nil {
|
|
resp.Error = err.Error()
|
|
}
|
|
|
|
if err := encoder.Encode(resp); err != nil {
|
|
t.Fatalf("Failed to encode %+v", resp)
|
|
}
|
|
} else if strings.Contains(req.URL.Path, prioritize) {
|
|
// Prioritize errors are ignored. Default k8s priorities or another extender's
|
|
// priorities may be applied.
|
|
priorities, _ := e.Prioritize(&args)
|
|
|
|
if err := encoder.Encode(priorities); err != nil {
|
|
t.Fatalf("Failed to encode %+v", priorities)
|
|
}
|
|
} else {
|
|
http.Error(w, "Unknown method", http.StatusNotFound)
|
|
}
|
|
}
|
|
|
|
func (e *Extender) filterUsingNodeCache(args *schedulerapi.ExtenderArgs) (*schedulerapi.ExtenderFilterResult, error) {
|
|
nodeSlice := make([]string, 0)
|
|
failedNodesMap := schedulerapi.FailedNodesMap{}
|
|
for _, nodeName := range *args.NodeNames {
|
|
fits := true
|
|
for _, predicate := range e.predicates {
|
|
fit, err := predicate(&args.Pod,
|
|
&v1.Node{ObjectMeta: metav1.ObjectMeta{Name: nodeName}})
|
|
if err != nil {
|
|
return &schedulerapi.ExtenderFilterResult{
|
|
Nodes: nil,
|
|
NodeNames: nil,
|
|
FailedNodes: schedulerapi.FailedNodesMap{},
|
|
Error: err.Error(),
|
|
}, err
|
|
}
|
|
if !fit {
|
|
fits = false
|
|
break
|
|
}
|
|
}
|
|
if fits {
|
|
nodeSlice = append(nodeSlice, nodeName)
|
|
} else {
|
|
failedNodesMap[nodeName] = fmt.Sprintf("extender failed: %s", e.name)
|
|
}
|
|
}
|
|
|
|
return &schedulerapi.ExtenderFilterResult{
|
|
Nodes: nil,
|
|
NodeNames: &nodeSlice,
|
|
FailedNodes: failedNodesMap,
|
|
}, nil
|
|
}
|
|
|
|
func (e *Extender) Filter(args *schedulerapi.ExtenderArgs) (*schedulerapi.ExtenderFilterResult, error) {
|
|
filtered := []v1.Node{}
|
|
failedNodesMap := schedulerapi.FailedNodesMap{}
|
|
|
|
if e.nodeCacheCapable {
|
|
return e.filterUsingNodeCache(args)
|
|
} else {
|
|
for _, node := range args.Nodes.Items {
|
|
fits := true
|
|
for _, predicate := range e.predicates {
|
|
fit, err := predicate(&args.Pod, &node)
|
|
if err != nil {
|
|
return &schedulerapi.ExtenderFilterResult{
|
|
Nodes: &v1.NodeList{},
|
|
NodeNames: nil,
|
|
FailedNodes: schedulerapi.FailedNodesMap{},
|
|
Error: err.Error(),
|
|
}, err
|
|
}
|
|
if !fit {
|
|
fits = false
|
|
break
|
|
}
|
|
}
|
|
if fits {
|
|
filtered = append(filtered, node)
|
|
} else {
|
|
failedNodesMap[node.Name] = fmt.Sprintf("extender failed: %s", e.name)
|
|
}
|
|
}
|
|
|
|
return &schedulerapi.ExtenderFilterResult{
|
|
Nodes: &v1.NodeList{Items: filtered},
|
|
NodeNames: nil,
|
|
FailedNodes: failedNodesMap,
|
|
}, nil
|
|
}
|
|
}
|
|
|
|
func (e *Extender) Prioritize(args *schedulerapi.ExtenderArgs) (*schedulerapi.HostPriorityList, error) {
|
|
result := schedulerapi.HostPriorityList{}
|
|
combinedScores := map[string]int{}
|
|
var nodes = &v1.NodeList{Items: []v1.Node{}}
|
|
|
|
if e.nodeCacheCapable {
|
|
for _, nodeName := range *args.NodeNames {
|
|
nodes.Items = append(nodes.Items, v1.Node{ObjectMeta: metav1.ObjectMeta{Name: nodeName}})
|
|
}
|
|
} else {
|
|
nodes = args.Nodes
|
|
}
|
|
|
|
for _, prioritizer := range e.prioritizers {
|
|
weight := prioritizer.weight
|
|
if weight == 0 {
|
|
continue
|
|
}
|
|
priorityFunc := prioritizer.function
|
|
prioritizedList, err := priorityFunc(&args.Pod, nodes)
|
|
if err != nil {
|
|
return &schedulerapi.HostPriorityList{}, err
|
|
}
|
|
for _, hostEntry := range *prioritizedList {
|
|
combinedScores[hostEntry.Host] += hostEntry.Score * weight
|
|
}
|
|
}
|
|
for host, score := range combinedScores {
|
|
result = append(result, schedulerapi.HostPriority{Host: host, Score: score})
|
|
}
|
|
return &result, nil
|
|
}
|
|
|
|
func machine_1_2_3_Predicate(pod *v1.Pod, node *v1.Node) (bool, error) {
|
|
if node.Name == "machine1" || node.Name == "machine2" || node.Name == "machine3" {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
func machine_2_3_5_Predicate(pod *v1.Pod, node *v1.Node) (bool, error) {
|
|
if node.Name == "machine2" || node.Name == "machine3" || node.Name == "machine5" {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
func machine_2_Prioritizer(pod *v1.Pod, nodes *v1.NodeList) (*schedulerapi.HostPriorityList, error) {
|
|
result := schedulerapi.HostPriorityList{}
|
|
for _, node := range nodes.Items {
|
|
score := 1
|
|
if node.Name == "machine2" {
|
|
score = 10
|
|
}
|
|
result = append(result, schedulerapi.HostPriority{
|
|
Host: node.Name,
|
|
Score: score,
|
|
})
|
|
}
|
|
return &result, nil
|
|
}
|
|
|
|
func machine_3_Prioritizer(pod *v1.Pod, nodes *v1.NodeList) (*schedulerapi.HostPriorityList, error) {
|
|
result := schedulerapi.HostPriorityList{}
|
|
for _, node := range nodes.Items {
|
|
score := 1
|
|
if node.Name == "machine3" {
|
|
score = 10
|
|
}
|
|
result = append(result, schedulerapi.HostPriority{
|
|
Host: node.Name,
|
|
Score: score,
|
|
})
|
|
}
|
|
return &result, nil
|
|
}
|
|
|
|
func TestSchedulerExtender(t *testing.T) {
|
|
_, s := framework.RunAMaster(nil)
|
|
defer s.Close()
|
|
|
|
ns := framework.CreateTestingNamespace("scheduler-extender", s, t)
|
|
defer framework.DeleteTestingNamespace(ns, s, t)
|
|
|
|
clientSet := clientset.NewForConfigOrDie(&restclient.Config{Host: s.URL, ContentConfig: restclient.ContentConfig{GroupVersion: &api.Registry.GroupOrDie(v1.GroupName).GroupVersion}})
|
|
|
|
extender1 := &Extender{
|
|
name: "extender1",
|
|
predicates: []fitPredicate{machine_1_2_3_Predicate},
|
|
prioritizers: []priorityConfig{{machine_2_Prioritizer, 1}},
|
|
}
|
|
es1 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
|
|
extender1.serveHTTP(t, w, req)
|
|
}))
|
|
defer es1.Close()
|
|
|
|
extender2 := &Extender{
|
|
name: "extender2",
|
|
predicates: []fitPredicate{machine_2_3_5_Predicate},
|
|
prioritizers: []priorityConfig{{machine_3_Prioritizer, 1}},
|
|
}
|
|
es2 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
|
|
extender2.serveHTTP(t, w, req)
|
|
}))
|
|
defer es2.Close()
|
|
|
|
extender3 := &Extender{
|
|
name: "extender3",
|
|
predicates: []fitPredicate{machine_1_2_3_Predicate},
|
|
prioritizers: []priorityConfig{{machine_2_Prioritizer, 5}},
|
|
nodeCacheCapable: true,
|
|
}
|
|
es3 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
|
|
extender3.serveHTTP(t, w, req)
|
|
}))
|
|
defer es3.Close()
|
|
|
|
policy := schedulerapi.Policy{
|
|
ExtenderConfigs: []schedulerapi.ExtenderConfig{
|
|
{
|
|
URLPrefix: es1.URL,
|
|
FilterVerb: filter,
|
|
PrioritizeVerb: prioritize,
|
|
Weight: 3,
|
|
EnableHttps: false,
|
|
},
|
|
{
|
|
URLPrefix: es2.URL,
|
|
FilterVerb: filter,
|
|
PrioritizeVerb: prioritize,
|
|
Weight: 4,
|
|
EnableHttps: false,
|
|
},
|
|
{
|
|
URLPrefix: es3.URL,
|
|
FilterVerb: filter,
|
|
PrioritizeVerb: prioritize,
|
|
Weight: 10,
|
|
EnableHttps: false,
|
|
NodeCacheCapable: true,
|
|
},
|
|
},
|
|
}
|
|
policy.APIVersion = api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String()
|
|
|
|
informerFactory := informers.NewSharedInformerFactory(clientSet, 0)
|
|
schedulerConfigFactory := factory.NewConfigFactory(
|
|
v1.DefaultSchedulerName,
|
|
clientSet,
|
|
informerFactory.Core().V1().Nodes(),
|
|
informerFactory.Core().V1().PersistentVolumes(),
|
|
informerFactory.Core().V1().PersistentVolumeClaims(),
|
|
informerFactory.Core().V1().ReplicationControllers(),
|
|
informerFactory.Extensions().V1beta1().ReplicaSets(),
|
|
informerFactory.Apps().V1beta1().StatefulSets(),
|
|
informerFactory.Core().V1().Services(),
|
|
v1.DefaultHardPodAffinitySymmetricWeight,
|
|
)
|
|
schedulerConfig, err := schedulerConfigFactory.CreateFromConfig(policy)
|
|
if err != nil {
|
|
t.Fatalf("Couldn't create scheduler config: %v", err)
|
|
}
|
|
eventBroadcaster := record.NewBroadcaster()
|
|
schedulerConfig.Recorder = eventBroadcaster.NewRecorder(api.Scheme, clientv1.EventSource{Component: v1.DefaultSchedulerName})
|
|
eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: v1core.New(clientSet.Core().RESTClient()).Events("")})
|
|
scheduler, _ := scheduler.NewFromConfigurator(&scheduler.FakeConfigurator{Config: schedulerConfig}, nil...)
|
|
informerFactory.Start(schedulerConfig.StopEverything)
|
|
scheduler.Run()
|
|
|
|
defer close(schedulerConfig.StopEverything)
|
|
|
|
DoTestPodScheduling(ns, t, clientSet)
|
|
}
|
|
|
|
func DoTestPodScheduling(ns *v1.Namespace, t *testing.T, cs clientset.Interface) {
|
|
// NOTE: This test cannot run in parallel, because it is creating and deleting
|
|
// non-namespaced objects (Nodes).
|
|
defer cs.Core().Nodes().DeleteCollection(nil, metav1.ListOptions{})
|
|
|
|
goodCondition := v1.NodeCondition{
|
|
Type: v1.NodeReady,
|
|
Status: v1.ConditionTrue,
|
|
Reason: fmt.Sprintf("schedulable condition"),
|
|
LastHeartbeatTime: metav1.Time{Time: time.Now()},
|
|
}
|
|
node := &v1.Node{
|
|
Spec: v1.NodeSpec{Unschedulable: false},
|
|
Status: v1.NodeStatus{
|
|
Capacity: v1.ResourceList{
|
|
v1.ResourcePods: *resource.NewQuantity(32, resource.DecimalSI),
|
|
},
|
|
Conditions: []v1.NodeCondition{goodCondition},
|
|
},
|
|
}
|
|
|
|
for ii := 0; ii < 5; ii++ {
|
|
node.Name = fmt.Sprintf("machine%d", ii+1)
|
|
if _, err := cs.Core().Nodes().Create(node); err != nil {
|
|
t.Fatalf("Failed to create nodes: %v", err)
|
|
}
|
|
}
|
|
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "extender-test-pod"},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{{Name: "container", Image: e2e.GetPauseImageName(cs)}},
|
|
},
|
|
}
|
|
|
|
myPod, err := cs.Core().Pods(ns.Name).Create(pod)
|
|
if err != nil {
|
|
t.Fatalf("Failed to create pod: %v", err)
|
|
}
|
|
|
|
err = wait.Poll(time.Second, wait.ForeverTestTimeout, podScheduled(cs, myPod.Namespace, myPod.Name))
|
|
if err != nil {
|
|
t.Fatalf("Failed to schedule pod: %v", err)
|
|
}
|
|
|
|
myPod, err = cs.Core().Pods(ns.Name).Get(myPod.Name, metav1.GetOptions{})
|
|
if err != nil {
|
|
t.Fatalf("Failed to get pod: %v", err)
|
|
} else if myPod.Spec.NodeName != "machine2" {
|
|
t.Fatalf("Failed to schedule using extender, expected machine2, got %v", myPod.Spec.NodeName)
|
|
}
|
|
t.Logf("Scheduled pod using extenders")
|
|
}
|