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validates basic preemption works|validates lower priority pod preemption by critical pod: allocate 4/5 instead of 2/3

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To run the tests in a single node cluster, create two pods consuming 2/5 of the extended resource instead of one consuming 2/3.
The low priority pod will be consuming 2/5 of the extended resource instead so in case there's only a single node,
a high priority pod consuming 2/5 of the extended resource can be still scheduled. Thus, making sure only the low priority pod
gets preempted once the preemptor pod consuming 2/5 of the extended resource gets scheduled while keeping the high priority pod untouched.
This commit is contained in:
Jan Chaloupka 2021-03-11 12:39:59 +01:00
parent 34c2672115
commit bf2fc250a4
1 changed files with 64 additions and 57 deletions
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37
test/e2e/scheduling/preemption.go
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@ -121,17 +121,19 @@ var _ = SIGDescribe("SchedulerPreemption [Serial]", func() {
framework.ConformanceIt("validates basic preemption works", func() { framework.ConformanceIt("validates basic preemption works", func() {
var podRes v1.ResourceList var podRes v1.ResourceList
// Create one pod per node that uses a lot of the node's resources. // Create two pods per node that uses a lot of the node's resources.
ginkgo.By("Create pods that use 2/3 of node resources.") ginkgo.By("Create pods that use 4/5 of node resources.")
pods := make([]*v1.Pod, 0, len(nodeList.Items)) pods := make([]*v1.Pod, 0, 2*len(nodeList.Items))
// Now create victim pods on each of the node with lower priority // Create pods in the cluster.
// One of them has low priority, making it the victim for preemption.
for i, node := range nodeList.Items { for i, node := range nodeList.Items {
// Update each node to advertise 3 available extended resources // Update each node to advertise 3 available extended resources
nodeCopy := node.DeepCopy() nodeCopy := node.DeepCopy()
nodeCopy.Status.Capacity[testExtendedResource] = resource.MustParse("3") nodeCopy.Status.Capacity[testExtendedResource] = resource.MustParse("5")
err := patchNode(cs, &node, nodeCopy) err := patchNode(cs, &node, nodeCopy)
framework.ExpectNoError(err) framework.ExpectNoError(err)
for j := 0; j < 2; j++ {
// Request 2 of the available resources for the victim pods // Request 2 of the available resources for the victim pods
podRes = v1.ResourceList{} podRes = v1.ResourceList{}
podRes[testExtendedResource] = resource.MustParse("2") podRes[testExtendedResource] = resource.MustParse("2")
@ -141,8 +143,8 @@ var _ = SIGDescribe("SchedulerPreemption [Serial]", func() {
if len(pods) == 0 { if len(pods) == 0 {
priorityName = lowPriorityClassName priorityName = lowPriorityClassName
} }
pods = append(pods, createPausePod(f, pausePodConfig{ pausePod := createPausePod(f, pausePodConfig{
Name: fmt.Sprintf("pod%d-%v", i, priorityName), Name: fmt.Sprintf("pod%d-%d-%v", i, j, priorityName),
PriorityClassName: priorityName, PriorityClassName: priorityName,
Resources: &v1.ResourceRequirements{ Resources: &v1.ResourceRequirements{
Requests: podRes, Requests: podRes,
@ -161,8 +163,10 @@ var _ = SIGDescribe("SchedulerPreemption [Serial]", func() {
}, },
}, },
}, },
})) })
framework.Logf("Created pod: %v", pods[i].Name) pods = append(pods, pausePod)
framework.Logf("Created pod: %v", pausePod.Name)
}
} }
if len(pods) < 2 { if len(pods) < 2 {
framework.Failf("We need at least two pods to be created but " + framework.Failf("We need at least two pods to be created but " +
@ -209,15 +213,16 @@ var _ = SIGDescribe("SchedulerPreemption [Serial]", func() {
framework.ConformanceIt("validates lower priority pod preemption by critical pod", func() { framework.ConformanceIt("validates lower priority pod preemption by critical pod", func() {
var podRes v1.ResourceList var podRes v1.ResourceList
ginkgo.By("Create pods that use 2/3 of node resources.") ginkgo.By("Create pods that use 4/5 of node resources.")
pods := make([]*v1.Pod, 0, len(nodeList.Items)) pods := make([]*v1.Pod, 0, len(nodeList.Items))
for i, node := range nodeList.Items { for i, node := range nodeList.Items {
// Update each node to advertise 3 available extended resources // Update each node to advertise 3 available extended resources
nodeCopy := node.DeepCopy() nodeCopy := node.DeepCopy()
nodeCopy.Status.Capacity[testExtendedResource] = resource.MustParse("3") nodeCopy.Status.Capacity[testExtendedResource] = resource.MustParse("5")
err := patchNode(cs, &node, nodeCopy) err := patchNode(cs, &node, nodeCopy)
framework.ExpectNoError(err) framework.ExpectNoError(err)
for j := 0; j < 2; j++ {
// Request 2 of the available resources for the victim pods // Request 2 of the available resources for the victim pods
podRes = v1.ResourceList{} podRes = v1.ResourceList{}
podRes[testExtendedResource] = resource.MustParse("2") podRes[testExtendedResource] = resource.MustParse("2")
@ -227,8 +232,8 @@ var _ = SIGDescribe("SchedulerPreemption [Serial]", func() {
if len(pods) == 0 { if len(pods) == 0 {
priorityName = lowPriorityClassName priorityName = lowPriorityClassName
} }
pods = append(pods, createPausePod(f, pausePodConfig{ pausePod := createPausePod(f, pausePodConfig{
Name: fmt.Sprintf("pod%d-%v", i, priorityName), Name: fmt.Sprintf("pod%d-%d-%v", i, j, priorityName),
PriorityClassName: priorityName, PriorityClassName: priorityName,
Resources: &v1.ResourceRequirements{ Resources: &v1.ResourceRequirements{
Requests: podRes, Requests: podRes,
@ -247,8 +252,10 @@ var _ = SIGDescribe("SchedulerPreemption [Serial]", func() {
}, },
}, },
}, },
})) })
framework.Logf("Created pod: %v", pods[i].Name) pods = append(pods, pausePod)
framework.Logf("Created pod: %v", pausePod.Name)
}
} }
if len(pods) < 2 { if len(pods) < 2 {
framework.Failf("We need at least two pods to be created but " + framework.Failf("We need at least two pods to be created but " +