242 lines
6.7 KiB
Go
242 lines
6.7 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 priorities
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import (
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"reflect"
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"testing"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
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nodeinfosnapshot "k8s.io/kubernetes/pkg/scheduler/nodeinfo/snapshot"
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)
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func nodeWithTaints(nodeName string, taints []v1.Taint) *v1.Node {
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return &v1.Node{
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ObjectMeta: metav1.ObjectMeta{
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Name: nodeName,
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},
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Spec: v1.NodeSpec{
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Taints: taints,
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},
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}
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}
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func podWithTolerations(tolerations []v1.Toleration) *v1.Pod {
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return &v1.Pod{
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Spec: v1.PodSpec{
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Tolerations: tolerations,
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},
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}
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}
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// This function will create a set of nodes and pods and test the priority
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// Nodes with zero,one,two,three,four and hundred taints are created
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// Pods with zero,one,two,three,four and hundred tolerations are created
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func TestTaintAndToleration(t *testing.T) {
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tests := []struct {
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pod *v1.Pod
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nodes []*v1.Node
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expectedList framework.NodeScoreList
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name string
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}{
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// basic test case
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{
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name: "node with taints tolerated by the pod, gets a higher score than those node with intolerable taints",
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pod: podWithTolerations([]v1.Toleration{{
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Key: "foo",
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Operator: v1.TolerationOpEqual,
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Value: "bar",
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Effect: v1.TaintEffectPreferNoSchedule,
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}}),
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nodes: []*v1.Node{
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nodeWithTaints("nodeA", []v1.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: v1.TaintEffectPreferNoSchedule,
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}}),
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nodeWithTaints("nodeB", []v1.Taint{{
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Key: "foo",
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Value: "blah",
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Effect: v1.TaintEffectPreferNoSchedule,
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}}),
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},
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expectedList: []framework.NodeScore{
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{Name: "nodeA", Score: framework.MaxNodeScore},
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{Name: "nodeB", Score: 0},
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},
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},
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// the count of taints that are tolerated by pod, does not matter.
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{
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name: "the nodes that all of their taints are tolerated by the pod, get the same score, no matter how many tolerable taints a node has",
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pod: podWithTolerations([]v1.Toleration{
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{
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Key: "cpu-type",
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Operator: v1.TolerationOpEqual,
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Value: "arm64",
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Effect: v1.TaintEffectPreferNoSchedule,
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}, {
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Key: "disk-type",
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Operator: v1.TolerationOpEqual,
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Value: "ssd",
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Effect: v1.TaintEffectPreferNoSchedule,
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},
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}),
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nodes: []*v1.Node{
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nodeWithTaints("nodeA", []v1.Taint{}),
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nodeWithTaints("nodeB", []v1.Taint{
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{
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Key: "cpu-type",
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Value: "arm64",
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Effect: v1.TaintEffectPreferNoSchedule,
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},
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}),
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nodeWithTaints("nodeC", []v1.Taint{
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{
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Key: "cpu-type",
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Value: "arm64",
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Effect: v1.TaintEffectPreferNoSchedule,
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}, {
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Key: "disk-type",
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Value: "ssd",
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Effect: v1.TaintEffectPreferNoSchedule,
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},
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}),
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},
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expectedList: []framework.NodeScore{
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{Name: "nodeA", Score: framework.MaxNodeScore},
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{Name: "nodeB", Score: framework.MaxNodeScore},
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{Name: "nodeC", Score: framework.MaxNodeScore},
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},
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},
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// the count of taints on a node that are not tolerated by pod, matters.
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{
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name: "the more intolerable taints a node has, the lower score it gets.",
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pod: podWithTolerations([]v1.Toleration{{
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Key: "foo",
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Operator: v1.TolerationOpEqual,
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Value: "bar",
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Effect: v1.TaintEffectPreferNoSchedule,
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}}),
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nodes: []*v1.Node{
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nodeWithTaints("nodeA", []v1.Taint{}),
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nodeWithTaints("nodeB", []v1.Taint{
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{
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Key: "cpu-type",
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Value: "arm64",
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Effect: v1.TaintEffectPreferNoSchedule,
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},
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}),
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nodeWithTaints("nodeC", []v1.Taint{
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{
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Key: "cpu-type",
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Value: "arm64",
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Effect: v1.TaintEffectPreferNoSchedule,
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}, {
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Key: "disk-type",
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Value: "ssd",
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Effect: v1.TaintEffectPreferNoSchedule,
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},
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}),
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},
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expectedList: []framework.NodeScore{
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{Name: "nodeA", Score: framework.MaxNodeScore},
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{Name: "nodeB", Score: 50},
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{Name: "nodeC", Score: 0},
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},
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},
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// taints-tolerations priority only takes care about the taints and tolerations that have effect PreferNoSchedule
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{
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name: "only taints and tolerations that have effect PreferNoSchedule are checked by taints-tolerations priority function",
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pod: podWithTolerations([]v1.Toleration{
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{
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Key: "cpu-type",
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Operator: v1.TolerationOpEqual,
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Value: "arm64",
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Effect: v1.TaintEffectNoSchedule,
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}, {
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Key: "disk-type",
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Operator: v1.TolerationOpEqual,
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Value: "ssd",
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Effect: v1.TaintEffectNoSchedule,
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},
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}),
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nodes: []*v1.Node{
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nodeWithTaints("nodeA", []v1.Taint{}),
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nodeWithTaints("nodeB", []v1.Taint{
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{
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Key: "cpu-type",
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Value: "arm64",
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Effect: v1.TaintEffectNoSchedule,
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},
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}),
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nodeWithTaints("nodeC", []v1.Taint{
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{
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Key: "cpu-type",
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Value: "arm64",
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Effect: v1.TaintEffectPreferNoSchedule,
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}, {
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Key: "disk-type",
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Value: "ssd",
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Effect: v1.TaintEffectPreferNoSchedule,
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},
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}),
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},
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expectedList: []framework.NodeScore{
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{Name: "nodeA", Score: framework.MaxNodeScore},
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{Name: "nodeB", Score: framework.MaxNodeScore},
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{Name: "nodeC", Score: 0},
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},
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},
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{
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name: "Default behaviour No taints and tolerations, lands on node with no taints",
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//pod without tolerations
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pod: podWithTolerations([]v1.Toleration{}),
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nodes: []*v1.Node{
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//Node without taints
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nodeWithTaints("nodeA", []v1.Taint{}),
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nodeWithTaints("nodeB", []v1.Taint{
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{
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Key: "cpu-type",
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Value: "arm64",
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Effect: v1.TaintEffectPreferNoSchedule,
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},
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}),
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},
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expectedList: []framework.NodeScore{
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{Name: "nodeA", Score: framework.MaxNodeScore},
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{Name: "nodeB", Score: 0},
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},
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},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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snapshot := nodeinfosnapshot.NewSnapshot(nodeinfosnapshot.CreateNodeInfoMap(nil, test.nodes))
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list, err := runMapReducePriority(ComputeTaintTolerationPriorityMap, ComputeTaintTolerationPriorityReduce, nil, test.pod, snapshot, test.nodes)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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if !reflect.DeepEqual(test.expectedList, list) {
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t.Errorf("expected:\n\t%+v,\ngot:\n\t%+v", test.expectedList, list)
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}
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})
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}
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}
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