be080584c6
* scheduler(NodeResourcesFit): calculatePodResourceRequest in PreScore phase * scheduler(NodeResourcesFit and NodeResourcesBalancedAllocation): calculatePodResourceRequest in PreScore phase * modify the comments and tests. * revert the tests. * don't need consider nodes. * use list instead of map. * add comment for podRequests. * avoid using negative wording in variable names.
430 lines
19 KiB
Go
430 lines
19 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 noderesources
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import (
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"context"
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"testing"
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"github.com/google/go-cmp/cmp"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/kubernetes/pkg/scheduler/apis/config"
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"k8s.io/kubernetes/pkg/scheduler/framework"
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plfeature "k8s.io/kubernetes/pkg/scheduler/framework/plugins/feature"
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"k8s.io/kubernetes/pkg/scheduler/framework/runtime"
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"k8s.io/kubernetes/pkg/scheduler/internal/cache"
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st "k8s.io/kubernetes/pkg/scheduler/testing"
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)
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func TestLeastAllocatedScoringStrategy(t *testing.T) {
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tests := []struct {
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name string
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requestedPod *v1.Pod
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nodes []*v1.Node
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existingPods []*v1.Pod
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expectedScores framework.NodeScoreList
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resources []config.ResourceSpec
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wantErrs field.ErrorList
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wantStatusCode framework.Code
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}{
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{
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// Node1 scores (remaining resources) on 0-MaxNodeScore scale
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// CPU Score: ((4000 - 0) * MaxNodeScore) / 4000 = MaxNodeScore
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// Memory Score: ((10000 - 0) * MaxNodeScore) / 10000 = MaxNodeScore
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// Node1 Score: (100 + 100) / 2 = 100
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// Node2 scores (remaining resources) on 0-MaxNodeScore scale
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// CPU Score: ((4000 - 0) * MaxNodeScore) / 4000 = MaxNodeScore
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// Memory Score: ((10000 - 0) * MaxNodeScore) / 10000 = MaxNodeScore
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// Node2 Score: (MaxNodeScore + MaxNodeScore) / 2 = MaxNodeScore
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name: "nothing scheduled, nothing requested",
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requestedPod: st.MakePod().Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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},
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existingPods: nil,
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expectedScores: []framework.NodeScore{{Name: "node1", Score: framework.MaxNodeScore}, {Name: "node2", Score: framework.MaxNodeScore}},
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resources: defaultResources,
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},
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{
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// Node1 scores on 0-MaxNodeScore scale
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// CPU Score: ((4000 - 3000) * MaxNodeScore) / 4000 = 25
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// Memory Score: ((10000 - 5000) * MaxNodeScore) / 10000 = 50
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// Node1 Score: (25 + 50) / 2 = 37
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// Node2 scores on 0-MaxNodeScore scale
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// CPU Score: ((6000 - 3000) * MaxNodeScore) / 6000 = 50
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// Memory Score: ((10000 - 5000) * MaxNodeScore) / 10000 = 50
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// Node2 Score: (50 + 50) / 2 = 50
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name: "nothing scheduled, resources requested, differently sized nodes",
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requestedPod: st.MakePod().
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000"}).Obj(),
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},
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existingPods: nil,
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 37}, {Name: "node2", Score: 50}},
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resources: defaultResources,
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},
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{
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name: "Resources not set, pods scheduled with error",
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requestedPod: st.MakePod().
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000"}).Obj(),
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},
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existingPods: nil,
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expectedScores: []framework.NodeScore{{Name: "node1", Score: framework.MinNodeScore}, {Name: "node2", Score: framework.MinNodeScore}},
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resources: nil,
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wantStatusCode: framework.Error,
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},
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{
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// Node1 scores on 0-MaxNodeScore scale
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// CPU Score: ((4000 - 0) * MaxNodeScore) / 4000 = MaxNodeScore
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// Memory Score: ((10000 - 0) * MaxNodeScore) / 10000 = MaxNodeScore
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// Node1 Score: (MaxNodeScore + MaxNodeScore) / 2 = MaxNodeScore
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// Node2 scores on 0-MaxNodeScore scale
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// CPU Score: ((4000 - 0) * MaxNodeScore) / 4000 = MaxNodeScore
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// Memory Score: ((10000 - 0) * MaxNodeScore) / 10000 = MaxNodeScore
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// Node2 Score: (MaxNodeScore + MaxNodeScore) / 2 = MaxNodeScore
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name: "no resources requested, pods scheduled",
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requestedPod: st.MakePod().Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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},
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existingPods: []*v1.Pod{
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st.MakePod().Node("node1").Obj(),
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st.MakePod().Node("node1").Obj(),
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st.MakePod().Node("node2").Obj(),
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st.MakePod().Node("node2").Obj(),
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},
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expectedScores: []framework.NodeScore{{Name: "node1", Score: framework.MaxNodeScore}, {Name: "node2", Score: framework.MaxNodeScore}},
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resources: defaultResources,
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},
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{
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// Node1 scores on 0-MaxNodeScore scale
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// CPU Score: ((10000 - 6000) * MaxNodeScore) / 10000 = 40
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// Memory Score: ((20000 - 0) * MaxNodeScore) / 20000 = MaxNodeScore
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// Node1 Score: (40 + 100) / 2 = 70
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// Node2 scores on 0-MaxNodeScore scale
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// CPU Score: ((10000 - 6000) * MaxNodeScore) / 10000 = 40
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// Memory Score: ((20000 - 5000) * MaxNodeScore) / 20000 = 75
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// Node2 Score: (40 + 75) / 2 = 57
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name: "no resources requested, pods scheduled with resources",
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requestedPod: st.MakePod().Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "10000", "memory": "20000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "10000", "memory": "20000"}).Obj(),
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},
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existingPods: []*v1.Pod{
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st.MakePod().Node("node1").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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st.MakePod().Node("node1").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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st.MakePod().Node("node2").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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st.MakePod().Node("node2").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "5000"}).Obj(),
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},
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 70}, {Name: "node2", Score: 57}},
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resources: defaultResources,
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},
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{
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// Node1 scores on 0-MaxNodeScore scale
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// CPU Score: ((10000 - 6000) * MaxNodeScore) / 10000 = 40
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// Memory Score: ((20000 - 5000) * MaxNodeScore) / 20000 = 75
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// Node1 Score: (40 + 75) / 2 = 57
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// Node2 scores on 0-MaxNodeScore scale
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// CPU Score: ((10000 - 6000) * MaxNodeScore) / 10000 = 40
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// Memory Score: ((20000 - 10000) * MaxNodeScore) / 20000 = 50
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// Node2 Score: (40 + 50) / 2 = 45
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name: "resources requested, pods scheduled with resources",
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requestedPod: st.MakePod().
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "10000", "memory": "20000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "10000", "memory": "20000"}).Obj(),
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},
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existingPods: []*v1.Pod{
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st.MakePod().Node("node1").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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st.MakePod().Node("node2").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "5000"}).Obj(),
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},
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 57}, {Name: "node2", Score: 45}},
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resources: defaultResources,
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},
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{
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// Node1 scores on 0-MaxNodeScore scale
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// CPU Score: ((10000 - 6000) * MaxNodeScore) / 10000 = 40
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// Memory Score: ((20000 - 5000) * MaxNodeScore) / 20000 = 75
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// Node1 Score: (40 + 75) / 2 = 57
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// Node2 scores on 0-MaxNodeScore scale
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// CPU Score: ((10000 - 6000) * MaxNodeScore) / 10000 = 40
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// Memory Score: ((50000 - 10000) * MaxNodeScore) / 50000 = 80
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// Node2 Score: (40 + 80) / 2 = 60
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name: "resources requested, pods scheduled with resources, differently sized nodes",
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requestedPod: st.MakePod().
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "10000", "memory": "20000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "10000", "memory": "50000"}).Obj(),
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},
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existingPods: []*v1.Pod{
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st.MakePod().Node("node1").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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st.MakePod().Node("node2").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "5000"}).Obj(),
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},
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 57}, {Name: "node2", Score: 60}},
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resources: defaultResources,
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},
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{
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// Node1 scores on 0-MaxNodeScore scale
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// CPU Score: ((4000 - 6000) * MaxNodeScore) / 4000 = 0
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// Memory Score: ((10000 - 0) * MaxNodeScore) / 10000 = MaxNodeScore
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// Node1 Score: (0 + MaxNodeScore) / 2 = 50
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// Node2 scores on 0-MaxNodeScore scale
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// CPU Score: ((4000 - 6000) * MaxNodeScore) / 4000 = 0
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// Memory Score: ((10000 - 5000) * MaxNodeScore) / 10000 = 50
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// Node2 Score: (0 + 50) / 2 = 25
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name: "requested resources exceed node capacity",
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requestedPod: st.MakePod().Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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},
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existingPods: []*v1.Pod{
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st.MakePod().Node("node1").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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st.MakePod().Node("node2").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "5000"}).Obj(),
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},
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 50}, {Name: "node2", Score: 25}},
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resources: defaultResources,
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},
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{
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name: "zero node resources, pods scheduled with resources",
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requestedPod: st.MakePod().Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Obj(),
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st.MakeNode().Name("node2").Obj(),
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},
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existingPods: []*v1.Pod{
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st.MakePod().Node("node1").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "0"}).Obj(),
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st.MakePod().Node("node2").Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "5000"}).Obj(),
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},
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expectedScores: []framework.NodeScore{{Name: "node1", Score: framework.MinNodeScore}, {Name: "node2", Score: framework.MinNodeScore}},
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resources: defaultResources,
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},
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{
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// CPU Score: ((4000 - 3000) *100) / 4000 = 25
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// Memory Score: ((10000 - 5000) *100) / 10000 = 50
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// Node1 Score: (25 * 1 + 50 * 2) / (1 + 2) = 41
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// CPU Score: ((6000 - 3000) *100) / 6000 = 50
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// Memory Score: ((10000 - 5000) *100) / 10000 = 50
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// Node2 Score: (50 * 1 + 50 * 2) / (1 + 2) = 50
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name: "nothing scheduled, resources requested with different weight on CPU and memory, differently sized nodes",
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requestedPod: st.MakePod().Node("node1").
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000"}).Obj(),
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},
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existingPods: nil,
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 41}, {Name: "node2", Score: 50}},
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resources: []config.ResourceSpec{
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{Name: "memory", Weight: 2},
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{Name: "cpu", Weight: 1},
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},
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},
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{
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// resource with negative weight is not allowed
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name: "resource with negative weight",
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requestedPod: st.MakePod().Node("node1").
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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},
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resources: []config.ResourceSpec{
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{Name: "memory", Weight: -1},
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{Name: "cpu", Weight: 1},
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},
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wantErrs: field.ErrorList{
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&field.Error{
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Type: field.ErrorTypeInvalid,
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Field: "scoringStrategy.resources[0].weight",
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},
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},
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},
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{
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// resource with zero weight is not allowed
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name: "resource with zero weight",
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requestedPod: st.MakePod().Node("node1").
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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},
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existingPods: nil,
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 41}, {Name: "node2", Score: 50}},
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resources: []config.ResourceSpec{
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{Name: "memory", Weight: 1},
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{Name: "cpu", Weight: 0},
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},
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wantErrs: field.ErrorList{
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&field.Error{
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Type: field.ErrorTypeInvalid,
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Field: "scoringStrategy.resources[1].weight",
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},
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},
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},
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{
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// resource weight should be less than MaxNodeScore
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name: "resource weight larger than MaxNodeScore",
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requestedPod: st.MakePod().Node("node1").
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
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},
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resources: []config.ResourceSpec{
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{Name: "memory", Weight: 1},
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{Name: "cpu", Weight: 101},
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},
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wantErrs: field.ErrorList{
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&field.Error{
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Type: field.ErrorTypeInvalid,
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Field: "scoringStrategy.resources[1].weight",
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},
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},
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},
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{
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// Bypass extended resource if the pod does not request.
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// For both nodes: cpuScore and memScore are 50
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// Given that extended resource score are intentionally bypassed,
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// the final scores are:
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// - node1: (50 + 50) / 2 = 50
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// - node2: (50 + 50) / 2 = 50
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name: "bypass extended resource if the pod does not request",
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requestedPod: st.MakePod().Node("node1").
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Req(map[v1.ResourceName]string{"cpu": "1000", "memory": "2000"}).
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Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "3000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000", v1.ResourceName(extendedRes): "4"}).Obj(),
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},
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 50}, {Name: "node2", Score: 50}},
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resources: extendedResourceSet,
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},
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{
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// Honor extended resource if the pod requests.
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// For both nodes: cpuScore and memScore are 50.
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// In terms of extended resource score:
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// - node1 get: 2 / 4 * 100 = 50
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// - node2 get: (10 - 2) / 10 * 100 = 80
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// So the final scores are:
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// - node1: (50 + 50 + 50) / 3 = 50
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// - node2: (50 + 50 + 80) / 3 = 60
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name: "honor extended resource if the pod requests",
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requestedPod: st.MakePod().Node("node1").
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Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "5000", v1.ResourceName(extendedRes): "2"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000", v1.ResourceName(extendedRes): "4"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000", v1.ResourceName(extendedRes): "10"}).Obj(),
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},
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existingPods: nil,
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expectedScores: []framework.NodeScore{{Name: "node1", Score: 50}, {Name: "node2", Score: 60}},
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resources: extendedResourceSet,
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},
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{
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// If the node doesn't have a resource
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// CPU Score: ((6000 - 3000) * 100) / 6000 = 50
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// Memory Score: ((10000 - 4000) * 100) / 10000 = 60
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// Node1 Score: (50 * 1 + 60 * 1) / (1 + 1) = 55
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// Node2 Score: (50 * 1 + 60 * 1) / (1 + 1) = 55
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name: "if the node doesn't have a resource",
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requestedPod: st.MakePod().Node("node1").
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Req(map[v1.ResourceName]string{"cpu": "3000", "memory": "4000"}).
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Obj(),
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nodes: []*v1.Node{
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st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000"}).Obj(),
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st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000", v1.ResourceName(extendedRes): "4"}).Obj(),
|
|
},
|
|
expectedScores: []framework.NodeScore{{Name: "node1", Score: 55}, {Name: "node2", Score: 55}},
|
|
resources: []config.ResourceSpec{
|
|
{Name: extendedRes, Weight: 2},
|
|
{Name: string(v1.ResourceCPU), Weight: 1},
|
|
{Name: string(v1.ResourceMemory), Weight: 1},
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
t.Run(test.name, func(t *testing.T) {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
state := framework.NewCycleState()
|
|
snapshot := cache.NewSnapshot(test.existingPods, test.nodes)
|
|
fh, _ := runtime.NewFramework(nil, nil, ctx.Done(), runtime.WithSnapshotSharedLister(snapshot))
|
|
|
|
p, err := NewFit(
|
|
&config.NodeResourcesFitArgs{
|
|
ScoringStrategy: &config.ScoringStrategy{
|
|
Type: config.LeastAllocated,
|
|
Resources: test.resources,
|
|
},
|
|
}, fh, plfeature.Features{})
|
|
|
|
if diff := cmp.Diff(test.wantErrs.ToAggregate(), err, ignoreBadValueDetail); diff != "" {
|
|
t.Fatalf("got err (-want,+got):\n%s", diff)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
status := p.(framework.PreScorePlugin).PreScore(ctx, state, test.requestedPod, test.nodes)
|
|
if !status.IsSuccess() {
|
|
t.Errorf("PreScore is expected to return success, but didn't. Got status: %v", status)
|
|
}
|
|
|
|
var gotScores framework.NodeScoreList
|
|
for _, n := range test.nodes {
|
|
score, status := p.(framework.ScorePlugin).Score(ctx, state, test.requestedPod, n.Name)
|
|
if status.Code() != test.wantStatusCode {
|
|
t.Errorf("unexpected status code, want: %v, got: %v", test.wantStatusCode, status.Code())
|
|
}
|
|
gotScores = append(gotScores, framework.NodeScore{Name: n.Name, Score: score})
|
|
}
|
|
|
|
if diff := cmp.Diff(test.expectedScores, gotScores); diff != "" {
|
|
t.Errorf("Unexpected scores (-want,+got):\n%s", diff)
|
|
}
|
|
})
|
|
}
|
|
}
|