mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-02 11:10:18 +00:00
314 lines
12 KiB
Go
314 lines
12 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package scheduling
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"k8s.io/api/core/v1"
|
|
"k8s.io/api/scheduling/v1alpha1"
|
|
"k8s.io/apimachinery/pkg/api/errors"
|
|
"k8s.io/apimachinery/pkg/api/resource"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
clientset "k8s.io/client-go/kubernetes"
|
|
schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
|
|
"k8s.io/kubernetes/test/e2e/framework"
|
|
|
|
. "github.com/onsi/ginkgo"
|
|
. "github.com/onsi/gomega"
|
|
_ "github.com/stretchr/testify/assert"
|
|
)
|
|
|
|
var _ = SIGDescribe("SchedulerPreemption [Serial] [Feature:PodPreemption]", func() {
|
|
var cs clientset.Interface
|
|
var nodeList *v1.NodeList
|
|
var ns string
|
|
f := framework.NewDefaultFramework("sched-preemption")
|
|
|
|
lowPriority, mediumPriority, highPriority := int32(1), int32(100), int32(1000)
|
|
lowPriorityClassName := f.BaseName + "-low-priority"
|
|
mediumPriorityClassName := f.BaseName + "-medium-priority"
|
|
highPriorityClassName := f.BaseName + "-high-priority"
|
|
AfterEach(func() {
|
|
})
|
|
|
|
BeforeEach(func() {
|
|
cs = f.ClientSet
|
|
ns = f.Namespace.Name
|
|
nodeList = &v1.NodeList{}
|
|
|
|
_, err := f.ClientSet.SchedulingV1alpha1().PriorityClasses().Create(&v1alpha1.PriorityClass{ObjectMeta: metav1.ObjectMeta{Name: highPriorityClassName}, Value: highPriority})
|
|
Expect(err == nil || errors.IsAlreadyExists(err)).To(Equal(true))
|
|
_, err = f.ClientSet.SchedulingV1alpha1().PriorityClasses().Create(&v1alpha1.PriorityClass{ObjectMeta: metav1.ObjectMeta{Name: mediumPriorityClassName}, Value: mediumPriority})
|
|
Expect(err == nil || errors.IsAlreadyExists(err)).To(Equal(true))
|
|
_, err = f.ClientSet.SchedulingV1alpha1().PriorityClasses().Create(&v1alpha1.PriorityClass{ObjectMeta: metav1.ObjectMeta{Name: lowPriorityClassName}, Value: lowPriority})
|
|
Expect(err == nil || errors.IsAlreadyExists(err)).To(Equal(true))
|
|
|
|
framework.WaitForAllNodesHealthy(cs, time.Minute)
|
|
masterNodes, nodeList = framework.GetMasterAndWorkerNodesOrDie(cs)
|
|
|
|
err = framework.CheckTestingNSDeletedExcept(cs, ns)
|
|
framework.ExpectNoError(err)
|
|
})
|
|
|
|
// This test verifies that when a higher priority pod is created and no node with
|
|
// enough resources is found, scheduler preempts a lower priority pod to schedule
|
|
// the high priority pod.
|
|
It("validates basic preemption works", func() {
|
|
var podRes v1.ResourceList
|
|
// Create one pod per node that uses a lot of the node's resources.
|
|
By("Create pods that use 60% of node resources.")
|
|
pods := make([]*v1.Pod, len(nodeList.Items))
|
|
for i, node := range nodeList.Items {
|
|
cpuAllocatable, found := node.Status.Allocatable["cpu"]
|
|
Expect(found).To(Equal(true))
|
|
milliCPU := cpuAllocatable.MilliValue() * 40 / 100
|
|
memAllocatable, found := node.Status.Allocatable["memory"]
|
|
Expect(found).To(Equal(true))
|
|
memory := memAllocatable.Value() * 60 / 100
|
|
podRes = v1.ResourceList{}
|
|
podRes[v1.ResourceCPU] = *resource.NewMilliQuantity(int64(milliCPU), resource.DecimalSI)
|
|
podRes[v1.ResourceMemory] = *resource.NewQuantity(int64(memory), resource.BinarySI)
|
|
|
|
// make the first pod low priority and the rest medium priority.
|
|
priorityName := mediumPriorityClassName
|
|
if i == 0 {
|
|
priorityName = lowPriorityClassName
|
|
}
|
|
pods[i] = createPausePod(f, pausePodConfig{
|
|
Name: fmt.Sprintf("pod%d-%v", i, priorityName),
|
|
PriorityClassName: priorityName,
|
|
Resources: &v1.ResourceRequirements{
|
|
Requests: podRes,
|
|
},
|
|
})
|
|
framework.Logf("Created pod: %v", pods[i].Name)
|
|
}
|
|
By("Wait for pods to be scheduled.")
|
|
for _, pod := range pods {
|
|
framework.ExpectNoError(framework.WaitForPodRunningInNamespace(cs, pod))
|
|
}
|
|
|
|
By("Run a high priority pod that use 60% of a node resources.")
|
|
// Create a high priority pod and make sure it is scheduled.
|
|
runPausePod(f, pausePodConfig{
|
|
Name: "preemptor-pod",
|
|
PriorityClassName: highPriorityClassName,
|
|
Resources: &v1.ResourceRequirements{
|
|
Requests: podRes,
|
|
},
|
|
})
|
|
// Make sure that the lowest priority pod is deleted.
|
|
preemptedPod, err := cs.CoreV1().Pods(pods[0].Namespace).Get(pods[0].Name, metav1.GetOptions{})
|
|
podDeleted := (err != nil && errors.IsNotFound(err)) ||
|
|
(err == nil && preemptedPod.DeletionTimestamp != nil)
|
|
Expect(podDeleted).To(BeTrue())
|
|
// Other pods (mid priority ones) should be present.
|
|
for i := 1; i < len(pods); i++ {
|
|
livePod, err := cs.CoreV1().Pods(pods[i].Namespace).Get(pods[i].Name, metav1.GetOptions{})
|
|
framework.ExpectNoError(err)
|
|
Expect(livePod.DeletionTimestamp).To(BeNil())
|
|
}
|
|
})
|
|
|
|
// This test verifies that when a critical pod is created and no node with
|
|
// enough resources is found, scheduler preempts a lower priority pod to schedule
|
|
// this critical pod.
|
|
It("validates lower priority pod preemption by critical pod", func() {
|
|
var podRes v1.ResourceList
|
|
// Create one pod per node that uses a lot of the node's resources.
|
|
By("Create pods that use 60% of node resources.")
|
|
pods := make([]*v1.Pod, len(nodeList.Items))
|
|
for i, node := range nodeList.Items {
|
|
cpuAllocatable, found := node.Status.Allocatable["cpu"]
|
|
Expect(found).To(Equal(true))
|
|
milliCPU := cpuAllocatable.MilliValue() * 40 / 100
|
|
memAllocatable, found := node.Status.Allocatable["memory"]
|
|
Expect(found).To(Equal(true))
|
|
memory := memAllocatable.Value() * 60 / 100
|
|
podRes = v1.ResourceList{}
|
|
podRes[v1.ResourceCPU] = *resource.NewMilliQuantity(int64(milliCPU), resource.DecimalSI)
|
|
podRes[v1.ResourceMemory] = *resource.NewQuantity(int64(memory), resource.BinarySI)
|
|
|
|
// make the first pod low priority and the rest medium priority.
|
|
priorityName := mediumPriorityClassName
|
|
if i == 0 {
|
|
priorityName = lowPriorityClassName
|
|
}
|
|
pods[i] = createPausePod(f, pausePodConfig{
|
|
Name: fmt.Sprintf("pod%d-%v", i, priorityName),
|
|
PriorityClassName: priorityName,
|
|
Resources: &v1.ResourceRequirements{
|
|
Requests: podRes,
|
|
},
|
|
})
|
|
framework.Logf("Created pod: %v", pods[i].Name)
|
|
}
|
|
By("Wait for pods to be scheduled.")
|
|
for _, pod := range pods {
|
|
framework.ExpectNoError(framework.WaitForPodRunningInNamespace(cs, pod))
|
|
}
|
|
|
|
By("Run a critical pod that use 60% of a node resources.")
|
|
// Create a critical pod and make sure it is scheduled.
|
|
runPausePod(f, pausePodConfig{
|
|
Name: "critical-pod",
|
|
PriorityClassName: schedulerapi.SystemClusterCritical,
|
|
Resources: &v1.ResourceRequirements{
|
|
Requests: podRes,
|
|
},
|
|
})
|
|
// Make sure that the lowest priority pod is deleted.
|
|
preemptedPod, err := cs.CoreV1().Pods(pods[0].Namespace).Get(pods[0].Name, metav1.GetOptions{})
|
|
podDeleted := (err != nil && errors.IsNotFound(err)) ||
|
|
(err == nil && preemptedPod.DeletionTimestamp != nil)
|
|
Expect(podDeleted).To(BeTrue())
|
|
// Other pods (mid priority ones) should be present.
|
|
for i := 1; i < len(pods); i++ {
|
|
livePod, err := cs.CoreV1().Pods(pods[i].Namespace).Get(pods[i].Name, metav1.GetOptions{})
|
|
framework.ExpectNoError(err)
|
|
Expect(livePod.DeletionTimestamp).To(BeNil())
|
|
}
|
|
})
|
|
|
|
// This test verifies that when a high priority pod is pending and its
|
|
// scheduling violates a medium priority pod anti-affinity, the medium priority
|
|
// pod is preempted to allow the higher priority pod schedule.
|
|
// It also verifies that existing low priority pods are not preempted as their
|
|
// preemption wouldn't help.
|
|
It("validates pod anti-affinity works in preemption", func() {
|
|
var podRes v1.ResourceList
|
|
// Create a few pods that uses a small amount of resources.
|
|
By("Create pods that use 10% of node resources.")
|
|
numPods := 4
|
|
if len(nodeList.Items) < numPods {
|
|
numPods = len(nodeList.Items)
|
|
}
|
|
pods := make([]*v1.Pod, numPods)
|
|
for i := 0; i < numPods; i++ {
|
|
node := nodeList.Items[i]
|
|
cpuAllocatable, found := node.Status.Allocatable["cpu"]
|
|
Expect(found).To(BeTrue())
|
|
milliCPU := cpuAllocatable.MilliValue() * 10 / 100
|
|
memAllocatable, found := node.Status.Allocatable["memory"]
|
|
Expect(found).To(BeTrue())
|
|
memory := memAllocatable.Value() * 10 / 100
|
|
podRes = v1.ResourceList{}
|
|
podRes[v1.ResourceCPU] = *resource.NewMilliQuantity(int64(milliCPU), resource.DecimalSI)
|
|
podRes[v1.ResourceMemory] = *resource.NewQuantity(int64(memory), resource.BinarySI)
|
|
|
|
// Apply node label to each node
|
|
framework.AddOrUpdateLabelOnNode(cs, node.Name, "node", node.Name)
|
|
framework.ExpectNodeHasLabel(cs, node.Name, "node", node.Name)
|
|
|
|
// make the first pod medium priority and the rest low priority.
|
|
priorityName := lowPriorityClassName
|
|
if i == 0 {
|
|
priorityName = mediumPriorityClassName
|
|
}
|
|
pods[i] = createPausePod(f, pausePodConfig{
|
|
Name: fmt.Sprintf("pod%d-%v", i, priorityName),
|
|
PriorityClassName: priorityName,
|
|
Resources: &v1.ResourceRequirements{
|
|
Requests: podRes,
|
|
},
|
|
Affinity: &v1.Affinity{
|
|
PodAntiAffinity: &v1.PodAntiAffinity{
|
|
RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
|
|
{
|
|
LabelSelector: &metav1.LabelSelector{
|
|
MatchExpressions: []metav1.LabelSelectorRequirement{
|
|
{
|
|
Key: "service",
|
|
Operator: metav1.LabelSelectorOpIn,
|
|
Values: []string{"blah", "foo"},
|
|
},
|
|
},
|
|
},
|
|
TopologyKey: "node",
|
|
},
|
|
},
|
|
},
|
|
NodeAffinity: &v1.NodeAffinity{
|
|
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
|
|
NodeSelectorTerms: []v1.NodeSelectorTerm{
|
|
{
|
|
MatchExpressions: []v1.NodeSelectorRequirement{
|
|
{
|
|
Key: "node",
|
|
Operator: v1.NodeSelectorOpIn,
|
|
Values: []string{node.Name},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
})
|
|
framework.Logf("Created pod: %v", pods[i].Name)
|
|
}
|
|
defer func() { // Remove added labels
|
|
for i := 0; i < numPods; i++ {
|
|
framework.RemoveLabelOffNode(cs, nodeList.Items[i].Name, "node")
|
|
}
|
|
}()
|
|
|
|
By("Wait for pods to be scheduled.")
|
|
for _, pod := range pods {
|
|
framework.ExpectNoError(framework.WaitForPodRunningInNamespace(cs, pod))
|
|
}
|
|
|
|
By("Run a high priority pod with node affinity to the first node.")
|
|
// Create a high priority pod and make sure it is scheduled.
|
|
runPausePod(f, pausePodConfig{
|
|
Name: "preemptor-pod",
|
|
PriorityClassName: highPriorityClassName,
|
|
Labels: map[string]string{"service": "blah"},
|
|
Affinity: &v1.Affinity{
|
|
NodeAffinity: &v1.NodeAffinity{
|
|
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
|
|
NodeSelectorTerms: []v1.NodeSelectorTerm{
|
|
{
|
|
MatchExpressions: []v1.NodeSelectorRequirement{
|
|
{
|
|
Key: "node",
|
|
Operator: v1.NodeSelectorOpIn,
|
|
Values: []string{nodeList.Items[0].Name},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
})
|
|
// Make sure that the medium priority pod on the first node is preempted.
|
|
preemptedPod, err := cs.CoreV1().Pods(pods[0].Namespace).Get(pods[0].Name, metav1.GetOptions{})
|
|
podDeleted := (err != nil && errors.IsNotFound(err)) ||
|
|
(err == nil && preemptedPod.DeletionTimestamp != nil)
|
|
Expect(podDeleted).To(BeTrue())
|
|
// Other pods (low priority ones) should be present.
|
|
for i := 1; i < len(pods); i++ {
|
|
livePod, err := cs.CoreV1().Pods(pods[i].Namespace).Get(pods[i].Name, metav1.GetOptions{})
|
|
framework.ExpectNoError(err)
|
|
Expect(livePod.DeletionTimestamp).To(BeNil())
|
|
}
|
|
})
|
|
})
|