619 lines
19 KiB
Go
619 lines
19 KiB
Go
/*
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Copyright 2014 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 factory
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import (
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"errors"
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"fmt"
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"reflect"
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"testing"
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"time"
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"k8s.io/api/core/v1"
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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/util/clock"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/client-go/informers"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/kubernetes/fake"
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fakeV1 "k8s.io/client-go/kubernetes/typed/core/v1/fake"
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clienttesting "k8s.io/client-go/testing"
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"k8s.io/client-go/tools/cache"
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apitesting "k8s.io/kubernetes/pkg/api/testing"
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"k8s.io/kubernetes/pkg/scheduler/algorithm"
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"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
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schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
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latestschedulerapi "k8s.io/kubernetes/pkg/scheduler/api/latest"
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"k8s.io/kubernetes/pkg/scheduler/apis/config"
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framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
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internalcache "k8s.io/kubernetes/pkg/scheduler/internal/cache"
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internalqueue "k8s.io/kubernetes/pkg/scheduler/internal/queue"
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schedulernodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
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)
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const (
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disablePodPreemption = false
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bindTimeoutSeconds = 600
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)
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func TestCreate(t *testing.T) {
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client := fake.NewSimpleClientset()
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stopCh := make(chan struct{})
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defer close(stopCh)
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factory := newConfigFactory(client, v1.DefaultHardPodAffinitySymmetricWeight, stopCh)
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factory.Create()
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}
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// Test configures a scheduler from a policies defined in a file
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// It combines some configurable predicate/priorities with some pre-defined ones
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func TestCreateFromConfig(t *testing.T) {
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var configData []byte
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var policy schedulerapi.Policy
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client := fake.NewSimpleClientset()
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stopCh := make(chan struct{})
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defer close(stopCh)
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factory := newConfigFactory(client, v1.DefaultHardPodAffinitySymmetricWeight, stopCh)
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// Pre-register some predicate and priority functions
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RegisterFitPredicate("PredicateOne", PredicateOne)
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RegisterFitPredicate("PredicateTwo", PredicateTwo)
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RegisterPriorityFunction("PriorityOne", PriorityOne, 1)
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RegisterPriorityFunction("PriorityTwo", PriorityTwo, 1)
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configData = []byte(`{
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"kind" : "Policy",
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"apiVersion" : "v1",
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"predicates" : [
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{"name" : "TestZoneAffinity", "argument" : {"serviceAffinity" : {"labels" : ["zone"]}}},
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{"name" : "TestRequireZone", "argument" : {"labelsPresence" : {"labels" : ["zone"], "presence" : true}}},
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{"name" : "PredicateOne"},
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{"name" : "PredicateTwo"}
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],
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"priorities" : [
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{"name" : "RackSpread", "weight" : 3, "argument" : {"serviceAntiAffinity" : {"label" : "rack"}}},
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{"name" : "PriorityOne", "weight" : 2},
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{"name" : "PriorityTwo", "weight" : 1} ]
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}`)
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if err := runtime.DecodeInto(latestschedulerapi.Codec, configData, &policy); err != nil {
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t.Errorf("Invalid configuration: %v", err)
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}
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factory.CreateFromConfig(policy)
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hpa := factory.GetHardPodAffinitySymmetricWeight()
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if hpa != v1.DefaultHardPodAffinitySymmetricWeight {
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t.Errorf("Wrong hardPodAffinitySymmetricWeight, ecpected: %d, got: %d", v1.DefaultHardPodAffinitySymmetricWeight, hpa)
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}
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}
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func TestCreateFromConfigWithHardPodAffinitySymmetricWeight(t *testing.T) {
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var configData []byte
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var policy schedulerapi.Policy
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client := fake.NewSimpleClientset()
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stopCh := make(chan struct{})
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defer close(stopCh)
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factory := newConfigFactory(client, v1.DefaultHardPodAffinitySymmetricWeight, stopCh)
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// Pre-register some predicate and priority functions
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RegisterFitPredicate("PredicateOne", PredicateOne)
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RegisterFitPredicate("PredicateTwo", PredicateTwo)
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RegisterPriorityFunction("PriorityOne", PriorityOne, 1)
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RegisterPriorityFunction("PriorityTwo", PriorityTwo, 1)
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configData = []byte(`{
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"kind" : "Policy",
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"apiVersion" : "v1",
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"predicates" : [
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{"name" : "TestZoneAffinity", "argument" : {"serviceAffinity" : {"labels" : ["zone"]}}},
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{"name" : "TestRequireZone", "argument" : {"labelsPresence" : {"labels" : ["zone"], "presence" : true}}},
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{"name" : "PredicateOne"},
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{"name" : "PredicateTwo"}
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],
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"priorities" : [
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{"name" : "RackSpread", "weight" : 3, "argument" : {"serviceAntiAffinity" : {"label" : "rack"}}},
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{"name" : "PriorityOne", "weight" : 2},
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{"name" : "PriorityTwo", "weight" : 1}
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],
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"hardPodAffinitySymmetricWeight" : 10
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}`)
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if err := runtime.DecodeInto(latestschedulerapi.Codec, configData, &policy); err != nil {
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t.Errorf("Invalid configuration: %v", err)
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}
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factory.CreateFromConfig(policy)
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hpa := factory.GetHardPodAffinitySymmetricWeight()
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if hpa != 10 {
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t.Errorf("Wrong hardPodAffinitySymmetricWeight, ecpected: %d, got: %d", 10, hpa)
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}
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}
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func TestCreateFromEmptyConfig(t *testing.T) {
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var configData []byte
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var policy schedulerapi.Policy
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client := fake.NewSimpleClientset()
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stopCh := make(chan struct{})
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defer close(stopCh)
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factory := newConfigFactory(client, v1.DefaultHardPodAffinitySymmetricWeight, stopCh)
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configData = []byte(`{}`)
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if err := runtime.DecodeInto(latestschedulerapi.Codec, configData, &policy); err != nil {
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t.Errorf("Invalid configuration: %v", err)
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}
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factory.CreateFromConfig(policy)
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}
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// Test configures a scheduler from a policy that does not specify any
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// predicate/priority.
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// The predicate/priority from DefaultProvider will be used.
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func TestCreateFromConfigWithUnspecifiedPredicatesOrPriorities(t *testing.T) {
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client := fake.NewSimpleClientset()
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stopCh := make(chan struct{})
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defer close(stopCh)
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factory := newConfigFactory(client, v1.DefaultHardPodAffinitySymmetricWeight, stopCh)
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RegisterFitPredicate("PredicateOne", PredicateOne)
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RegisterPriorityFunction("PriorityOne", PriorityOne, 1)
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RegisterAlgorithmProvider(DefaultProvider, sets.NewString("PredicateOne"), sets.NewString("PriorityOne"))
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configData := []byte(`{
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"kind" : "Policy",
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"apiVersion" : "v1"
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}`)
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var policy schedulerapi.Policy
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if err := runtime.DecodeInto(latestschedulerapi.Codec, configData, &policy); err != nil {
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t.Fatalf("Invalid configuration: %v", err)
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}
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config, err := factory.CreateFromConfig(policy)
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if err != nil {
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t.Fatalf("Failed to create scheduler from configuration: %v", err)
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}
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if _, found := config.Algorithm.Predicates()["PredicateOne"]; !found {
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t.Errorf("Expected predicate PredicateOne from %q", DefaultProvider)
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}
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if len(config.Algorithm.Prioritizers()) != 1 || config.Algorithm.Prioritizers()[0].Name != "PriorityOne" {
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t.Errorf("Expected priority PriorityOne from %q", DefaultProvider)
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}
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}
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// Test configures a scheduler from a policy that contains empty
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// predicate/priority.
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// Empty predicate/priority sets will be used.
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func TestCreateFromConfigWithEmptyPredicatesOrPriorities(t *testing.T) {
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client := fake.NewSimpleClientset()
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stopCh := make(chan struct{})
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defer close(stopCh)
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factory := newConfigFactory(client, v1.DefaultHardPodAffinitySymmetricWeight, stopCh)
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RegisterFitPredicate("PredicateOne", PredicateOne)
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RegisterPriorityFunction("PriorityOne", PriorityOne, 1)
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RegisterAlgorithmProvider(DefaultProvider, sets.NewString("PredicateOne"), sets.NewString("PriorityOne"))
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configData := []byte(`{
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"kind" : "Policy",
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"apiVersion" : "v1",
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"predicates" : [],
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"priorities" : []
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}`)
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var policy schedulerapi.Policy
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if err := runtime.DecodeInto(latestschedulerapi.Codec, configData, &policy); err != nil {
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t.Fatalf("Invalid configuration: %v", err)
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}
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config, err := factory.CreateFromConfig(policy)
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if err != nil {
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t.Fatalf("Failed to create scheduler from configuration: %v", err)
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}
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if len(config.Algorithm.Predicates()) != 0 {
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t.Error("Expected empty predicate sets")
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}
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if len(config.Algorithm.Prioritizers()) != 0 {
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t.Error("Expected empty priority sets")
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}
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}
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func PredicateOne(pod *v1.Pod, meta predicates.PredicateMetadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []predicates.PredicateFailureReason, error) {
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return true, nil, nil
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}
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func PredicateTwo(pod *v1.Pod, meta predicates.PredicateMetadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []predicates.PredicateFailureReason, error) {
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return true, nil, nil
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}
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func PriorityOne(pod *v1.Pod, nodeNameToInfo map[string]*schedulernodeinfo.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error) {
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return []schedulerapi.HostPriority{}, nil
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}
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func PriorityTwo(pod *v1.Pod, nodeNameToInfo map[string]*schedulernodeinfo.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error) {
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return []schedulerapi.HostPriority{}, nil
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}
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func TestDefaultErrorFunc(t *testing.T) {
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testPod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "bar"},
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Spec: apitesting.V1DeepEqualSafePodSpec(),
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}
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client := fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testPod}})
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stopCh := make(chan struct{})
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defer close(stopCh)
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timestamp := time.Now()
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queue := internalqueue.NewPriorityQueueWithClock(nil, clock.NewFakeClock(timestamp), nil)
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schedulerCache := internalcache.New(30*time.Second, stopCh)
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errFunc := MakeDefaultErrorFunc(client, queue, schedulerCache, stopCh)
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// Trigger error handling again to put the pod in unschedulable queue
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errFunc(testPod, nil)
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// Try up to a minute to retrieve the error pod from priority queue
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foundPodFlag := false
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maxIterations := 10 * 60
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for i := 0; i < maxIterations; i++ {
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time.Sleep(100 * time.Millisecond)
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got := getPodfromPriorityQueue(queue, testPod)
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if got == nil {
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continue
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}
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testClientGetPodRequest(client, t, testPod.Namespace, testPod.Name)
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if e, a := testPod, got; !reflect.DeepEqual(e, a) {
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t.Errorf("Expected %v, got %v", e, a)
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}
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foundPodFlag = true
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break
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}
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if !foundPodFlag {
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t.Errorf("Failed to get pod from the unschedulable queue after waiting for a minute: %v", testPod)
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}
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// Remove the pod from priority queue to test putting error
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// pod in backoff queue.
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queue.Delete(testPod)
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// Trigger a move request
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queue.MoveAllToActiveQueue()
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// Trigger error handling again to put the pod in backoff queue
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errFunc(testPod, nil)
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foundPodFlag = false
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for i := 0; i < maxIterations; i++ {
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time.Sleep(100 * time.Millisecond)
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// The pod should be found from backoff queue at this time
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got := getPodfromPriorityQueue(queue, testPod)
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if got == nil {
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continue
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}
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testClientGetPodRequest(client, t, testPod.Namespace, testPod.Name)
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if e, a := testPod, got; !reflect.DeepEqual(e, a) {
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t.Errorf("Expected %v, got %v", e, a)
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}
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foundPodFlag = true
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break
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}
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if !foundPodFlag {
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t.Errorf("Failed to get pod from the backoff queue after waiting for a minute: %v", testPod)
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}
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}
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// getPodfromPriorityQueue is the function used in the TestDefaultErrorFunc test to get
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// the specific pod from the given priority queue. It returns the found pod in the priority queue.
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func getPodfromPriorityQueue(queue *internalqueue.PriorityQueue, pod *v1.Pod) *v1.Pod {
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podList := queue.PendingPods()
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if len(podList) == 0 {
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return nil
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}
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queryPodKey, err := cache.MetaNamespaceKeyFunc(pod)
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if err != nil {
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return nil
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}
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for _, foundPod := range podList {
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foundPodKey, err := cache.MetaNamespaceKeyFunc(foundPod)
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if err != nil {
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return nil
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}
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if foundPodKey == queryPodKey {
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return foundPod
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}
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}
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return nil
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}
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// testClientGetPodRequest function provides a routine used by TestDefaultErrorFunc test.
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// It tests whether the fake client can receive request and correctly "get" the namespace
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// and name of the error pod.
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func testClientGetPodRequest(client *fake.Clientset, t *testing.T, podNs string, podName string) {
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requestReceived := false
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actions := client.Actions()
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for _, a := range actions {
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if a.GetVerb() == "get" {
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getAction, ok := a.(clienttesting.GetAction)
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if !ok {
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t.Errorf("Can't cast action object to GetAction interface")
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break
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}
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name := getAction.GetName()
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ns := a.GetNamespace()
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if name != podName || ns != podNs {
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t.Errorf("Expected name %s namespace %s, got %s %s",
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podName, podNs, name, ns)
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}
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requestReceived = true
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}
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}
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if !requestReceived {
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t.Errorf("Get pod request not received")
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}
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}
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func TestBind(t *testing.T) {
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table := []struct {
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name string
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binding *v1.Binding
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}{
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{
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name: "binding can bind and validate request",
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binding: &v1.Binding{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: metav1.NamespaceDefault,
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Name: "foo",
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},
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Target: v1.ObjectReference{
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Name: "foohost.kubernetes.mydomain.com",
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},
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},
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},
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}
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for _, test := range table {
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t.Run(test.name, func(t *testing.T) {
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testBind(test.binding, t)
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})
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}
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}
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func testBind(binding *v1.Binding, t *testing.T) {
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testPod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{Name: binding.GetName(), Namespace: metav1.NamespaceDefault},
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Spec: apitesting.V1DeepEqualSafePodSpec(),
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}
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client := fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testPod}})
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b := binder{client}
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if err := b.Bind(binding); err != nil {
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t.Errorf("Unexpected error: %v", err)
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return
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}
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pod := client.CoreV1().Pods(metav1.NamespaceDefault).(*fakeV1.FakePods)
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actualBinding, err := pod.GetBinding(binding.GetName())
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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return
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}
|
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if !reflect.DeepEqual(binding, actualBinding) {
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t.Errorf("Binding did not match expectation")
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t.Logf("Expected: %v", binding)
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t.Logf("Actual: %v", actualBinding)
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}
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}
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|
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func TestInvalidHardPodAffinitySymmetricWeight(t *testing.T) {
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client := fake.NewSimpleClientset()
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// factory of "default-scheduler"
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stopCh := make(chan struct{})
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factory := newConfigFactory(client, -1, stopCh)
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defer close(stopCh)
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_, err := factory.Create()
|
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if err == nil {
|
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t.Errorf("expected err: invalid hardPodAffinitySymmetricWeight, got nothing")
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}
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}
|
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|
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func TestInvalidFactoryArgs(t *testing.T) {
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client := fake.NewSimpleClientset()
|
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|
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testCases := []struct {
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name string
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hardPodAffinitySymmetricWeight int32
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expectErr string
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}{
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{
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name: "symmetric weight below range",
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hardPodAffinitySymmetricWeight: -1,
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expectErr: "invalid hardPodAffinitySymmetricWeight: -1, must be in the range 0-100",
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},
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{
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name: "symmetric weight above range",
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hardPodAffinitySymmetricWeight: 101,
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expectErr: "invalid hardPodAffinitySymmetricWeight: 101, must be in the range 0-100",
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},
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}
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|
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for _, test := range testCases {
|
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t.Run(test.name, func(t *testing.T) {
|
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stopCh := make(chan struct{})
|
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factory := newConfigFactory(client, test.hardPodAffinitySymmetricWeight, stopCh)
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defer close(stopCh)
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_, err := factory.Create()
|
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if err == nil {
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t.Errorf("expected err: %s, got nothing", test.expectErr)
|
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}
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})
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}
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}
|
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|
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func newConfigFactory(client clientset.Interface, hardPodAffinitySymmetricWeight int32, stopCh <-chan struct{}) Configurator {
|
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informerFactory := informers.NewSharedInformerFactory(client, 0)
|
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return NewConfigFactory(&ConfigFactoryArgs{
|
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v1.DefaultSchedulerName,
|
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client,
|
|
informerFactory.Core().V1().Nodes(),
|
|
informerFactory.Core().V1().Pods(),
|
|
informerFactory.Core().V1().PersistentVolumes(),
|
|
informerFactory.Core().V1().PersistentVolumeClaims(),
|
|
informerFactory.Core().V1().ReplicationControllers(),
|
|
informerFactory.Apps().V1().ReplicaSets(),
|
|
informerFactory.Apps().V1().StatefulSets(),
|
|
informerFactory.Core().V1().Services(),
|
|
informerFactory.Policy().V1beta1().PodDisruptionBudgets(),
|
|
informerFactory.Storage().V1().StorageClasses(),
|
|
hardPodAffinitySymmetricWeight,
|
|
disablePodPreemption,
|
|
schedulerapi.DefaultPercentageOfNodesToScore,
|
|
bindTimeoutSeconds,
|
|
stopCh,
|
|
framework.NewRegistry(),
|
|
nil,
|
|
[]config.PluginConfig{},
|
|
})
|
|
}
|
|
|
|
type fakeExtender struct {
|
|
isBinder bool
|
|
interestedPodName string
|
|
ignorable bool
|
|
}
|
|
|
|
func (f *fakeExtender) Name() string {
|
|
return "fakeExtender"
|
|
}
|
|
|
|
func (f *fakeExtender) IsIgnorable() bool {
|
|
return f.ignorable
|
|
}
|
|
|
|
func (f *fakeExtender) ProcessPreemption(
|
|
pod *v1.Pod,
|
|
nodeToVictims map[*v1.Node]*schedulerapi.Victims,
|
|
nodeNameToInfo map[string]*schedulernodeinfo.NodeInfo,
|
|
) (map[*v1.Node]*schedulerapi.Victims, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (f *fakeExtender) SupportsPreemption() bool {
|
|
return false
|
|
}
|
|
|
|
func (f *fakeExtender) Filter(
|
|
pod *v1.Pod,
|
|
nodes []*v1.Node,
|
|
nodeNameToInfo map[string]*schedulernodeinfo.NodeInfo,
|
|
) (filteredNodes []*v1.Node, failedNodesMap schedulerapi.FailedNodesMap, err error) {
|
|
return nil, nil, nil
|
|
}
|
|
|
|
func (f *fakeExtender) Prioritize(
|
|
pod *v1.Pod,
|
|
nodes []*v1.Node,
|
|
) (hostPriorities *schedulerapi.HostPriorityList, weight int, err error) {
|
|
return nil, 0, nil
|
|
}
|
|
|
|
func (f *fakeExtender) Bind(binding *v1.Binding) error {
|
|
if f.isBinder {
|
|
return nil
|
|
}
|
|
return errors.New("not a binder")
|
|
}
|
|
|
|
func (f *fakeExtender) IsBinder() bool {
|
|
return f.isBinder
|
|
}
|
|
|
|
func (f *fakeExtender) IsInterested(pod *v1.Pod) bool {
|
|
return pod != nil && pod.Name == f.interestedPodName
|
|
}
|
|
|
|
func TestGetBinderFunc(t *testing.T) {
|
|
table := []struct {
|
|
podName string
|
|
extenders []algorithm.SchedulerExtender
|
|
expectedBinderType string
|
|
name string
|
|
}{
|
|
{
|
|
name: "the extender is not a binder",
|
|
podName: "pod0",
|
|
extenders: []algorithm.SchedulerExtender{
|
|
&fakeExtender{isBinder: false, interestedPodName: "pod0"},
|
|
},
|
|
expectedBinderType: "*factory.binder",
|
|
},
|
|
{
|
|
name: "one of the extenders is a binder and interested in pod",
|
|
podName: "pod0",
|
|
extenders: []algorithm.SchedulerExtender{
|
|
&fakeExtender{isBinder: false, interestedPodName: "pod0"},
|
|
&fakeExtender{isBinder: true, interestedPodName: "pod0"},
|
|
},
|
|
expectedBinderType: "*factory.fakeExtender",
|
|
},
|
|
{
|
|
name: "one of the extenders is a binder, but not interested in pod",
|
|
podName: "pod1",
|
|
extenders: []algorithm.SchedulerExtender{
|
|
&fakeExtender{isBinder: false, interestedPodName: "pod1"},
|
|
&fakeExtender{isBinder: true, interestedPodName: "pod0"},
|
|
},
|
|
expectedBinderType: "*factory.binder",
|
|
},
|
|
}
|
|
|
|
for _, test := range table {
|
|
t.Run(test.name, func(t *testing.T) {
|
|
testGetBinderFunc(test.expectedBinderType, test.podName, test.extenders, t)
|
|
})
|
|
}
|
|
}
|
|
|
|
func testGetBinderFunc(expectedBinderType, podName string, extenders []algorithm.SchedulerExtender, t *testing.T) {
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: podName,
|
|
},
|
|
}
|
|
|
|
f := &configFactory{}
|
|
binderFunc := getBinderFunc(f.client, extenders)
|
|
binder := binderFunc(pod)
|
|
|
|
binderType := fmt.Sprintf("%s", reflect.TypeOf(binder))
|
|
if binderType != expectedBinderType {
|
|
t.Errorf("Expected binder %q but got %q", expectedBinderType, binderType)
|
|
}
|
|
}
|