kubelet evictions take priority into account
This commit is contained in:
David Ashpole
@@ -26,7 +26,9 @@ import (
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/features"
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statsapi "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
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"k8s.io/kubernetes/pkg/kubelet/cm"
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evictionapi "k8s.io/kubernetes/pkg/kubelet/eviction/api"
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@@ -435,22 +437,48 @@ func thresholdEqual(a evictionapi.Threshold, b evictionapi.Threshold) bool {
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compareThresholdValue(a.Value, b.Value)
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}
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// TestOrderedByQoS ensures we order BestEffort < Burstable < Guaranteed
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func TestOrderedByQoS(t *testing.T) {
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bestEffort := newPod("best-effort", []v1.Container{
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newContainer("best-effort", newResourceList("", ""), newResourceList("", "")),
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// TestOrderedByPriority ensures we order BestEffort < Burstable < Guaranteed
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func TestOrderedByPriority(t *testing.T) {
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enablePodPriority(true)
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low := newPod("low-priority", -134, []v1.Container{
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newContainer("low-priority", newResourceList("", ""), newResourceList("", "")),
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}, nil)
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burstable := newPod("burstable", []v1.Container{
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newContainer("burstable", newResourceList("100m", "100Mi"), newResourceList("200m", "200Mi")),
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medium := newPod("medium-priority", 1, []v1.Container{
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newContainer("medium-priority", newResourceList("100m", "100Mi"), newResourceList("200m", "200Mi")),
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}, nil)
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guaranteed := newPod("guaranteed", []v1.Container{
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newContainer("guaranteed", newResourceList("200m", "200Mi"), newResourceList("200m", "200Mi")),
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high := newPod("high-priority", 12534, []v1.Container{
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newContainer("high-priority", newResourceList("200m", "200Mi"), newResourceList("200m", "200Mi")),
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}, nil)
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pods := []*v1.Pod{guaranteed, burstable, bestEffort}
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orderedBy(qosComparator).Sort(pods)
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pods := []*v1.Pod{high, medium, low}
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orderedBy(priority).Sort(pods)
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expected := []*v1.Pod{bestEffort, burstable, guaranteed}
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expected := []*v1.Pod{low, medium, high}
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for i := range expected {
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if pods[i] != expected[i] {
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t.Errorf("Expected pod: %s, but got: %s", expected[i].Name, pods[i].Name)
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}
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}
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}
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// TestOrderedByPriority ensures we order BestEffort < Burstable < Guaranteed
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func TestOrderedByPriorityDisabled(t *testing.T) {
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enablePodPriority(false)
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low := newPod("low-priority", lowPriority, []v1.Container{
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newContainer("low-priority", newResourceList("", ""), newResourceList("", "")),
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}, nil)
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medium := newPod("medium-priority", defaultPriority, []v1.Container{
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newContainer("medium-priority", newResourceList("100m", "100Mi"), newResourceList("200m", "200Mi")),
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}, nil)
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high := newPod("high-priority", highPriority, []v1.Container{
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newContainer("high-priority", newResourceList("200m", "200Mi"), newResourceList("200m", "200Mi")),
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}, nil)
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pods := []*v1.Pod{high, medium, low}
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orderedBy(priority).Sort(pods)
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// orderedBy(priority) should not change the input ordering, since we did not enable the PodPriority feature gate
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expected := []*v1.Pod{high, medium, low}
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for i := range expected {
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if pods[i] != expected[i] {
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t.Errorf("Expected pod: %s, but got: %s", expected[i].Name, pods[i].Name)
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@@ -469,42 +497,43 @@ func TestOrderedbyInodes(t *testing.T) {
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// testOrderedByDisk ensures we order pods by greediest resource consumer
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func testOrderedByResource(t *testing.T, orderedByResource v1.ResourceName,
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newPodStatsFunc func(pod *v1.Pod, rootFsUsed, logsUsed, perLocalVolumeUsed resource.Quantity) statsapi.PodStats) {
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pod1 := newPod("best-effort-high", []v1.Container{
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enablePodPriority(true)
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pod1 := newPod("best-effort-high", defaultPriority, []v1.Container{
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newContainer("best-effort-high", newResourceList("", ""), newResourceList("", "")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod2 := newPod("best-effort-low", []v1.Container{
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pod2 := newPod("best-effort-low", defaultPriority, []v1.Container{
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newContainer("best-effort-low", newResourceList("", ""), newResourceList("", "")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod3 := newPod("burstable-high", []v1.Container{
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pod3 := newPod("burstable-high", defaultPriority, []v1.Container{
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newContainer("burstable-high", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod4 := newPod("burstable-low", []v1.Container{
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pod4 := newPod("burstable-low", defaultPriority, []v1.Container{
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newContainer("burstable-low", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod5 := newPod("guaranteed-high", []v1.Container{
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pod5 := newPod("guaranteed-high", defaultPriority, []v1.Container{
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newContainer("guaranteed-high", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod6 := newPod("guaranteed-low", []v1.Container{
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pod6 := newPod("guaranteed-low", defaultPriority, []v1.Container{
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newContainer("guaranteed-low", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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@@ -533,74 +562,59 @@ func testOrderedByResource(t *testing.T, orderedByResource v1.ResourceName,
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}
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}
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func TestOrderedbyQoSDisk(t *testing.T) {
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testOrderedByQoSResource(t, resourceDisk, newPodDiskStats)
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func TestOrderedbyPriorityDisk(t *testing.T) {
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testOrderedByPriorityResource(t, resourceDisk, newPodDiskStats)
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}
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func TestOrderedbyQoSInodes(t *testing.T) {
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testOrderedByQoSResource(t, resourceInodes, newPodInodeStats)
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func TestOrderedbyPriorityInodes(t *testing.T) {
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testOrderedByPriorityResource(t, resourceInodes, newPodInodeStats)
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}
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// testOrderedByQoSDisk ensures we order pods by qos and then greediest resource consumer
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func testOrderedByQoSResource(t *testing.T, orderedByResource v1.ResourceName,
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// testOrderedByPriorityDisk ensures we order pods by qos and then greediest resource consumer
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func testOrderedByPriorityResource(t *testing.T, orderedByResource v1.ResourceName,
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newPodStatsFunc func(pod *v1.Pod, rootFsUsed, logsUsed, perLocalVolumeUsed resource.Quantity) statsapi.PodStats) {
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pod1 := newPod("best-effort-high", []v1.Container{
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newContainer("best-effort-high", newResourceList("", ""), newResourceList("", "")),
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enablePodPriority(true)
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pod1 := newPod("low-priority-high-usage", lowPriority, []v1.Container{
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newContainer("low-priority-high-usage", newResourceList("", ""), newResourceList("", "")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod2 := newPod("best-effort-low", []v1.Container{
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newContainer("best-effort-low", newResourceList("", ""), newResourceList("", "")),
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pod2 := newPod("low-priority-low-usage", lowPriority, []v1.Container{
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newContainer("low-priority-low-usage", newResourceList("", ""), newResourceList("", "")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod3 := newPod("burstable-high", []v1.Container{
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newContainer("burstable-high", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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pod3 := newPod("high-priority-high-usage", highPriority, []v1.Container{
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newContainer("high-priority-high-usage", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod4 := newPod("burstable-low", []v1.Container{
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newContainer("burstable-low", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod5 := newPod("guaranteed-high", []v1.Container{
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newContainer("guaranteed-high", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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pod6 := newPod("guaranteed-low", []v1.Container{
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newContainer("guaranteed-low", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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pod4 := newPod("high-priority-low-usage", highPriority, []v1.Container{
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newContainer("high-priority-low-usage", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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}, []v1.Volume{
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newVolume("local-volume", v1.VolumeSource{
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EmptyDir: &v1.EmptyDirVolumeSource{},
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}),
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})
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stats := map[*v1.Pod]statsapi.PodStats{
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pod1: newPodStatsFunc(pod1, resource.MustParse("50Mi"), resource.MustParse("100Mi"), resource.MustParse("50Mi")), // 200Mi
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pod2: newPodStatsFunc(pod2, resource.MustParse("100Mi"), resource.MustParse("150Mi"), resource.MustParse("50Mi")), // 300Mi
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pod3: newPodStatsFunc(pod3, resource.MustParse("200Mi"), resource.MustParse("150Mi"), resource.MustParse("50Mi")), // 400Mi
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pod4: newPodStatsFunc(pod4, resource.MustParse("300Mi"), resource.MustParse("100Mi"), resource.MustParse("50Mi")), // 450Mi
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pod5: newPodStatsFunc(pod5, resource.MustParse("400Mi"), resource.MustParse("100Mi"), resource.MustParse("50Mi")), // 550Mi
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pod6: newPodStatsFunc(pod6, resource.MustParse("500Mi"), resource.MustParse("100Mi"), resource.MustParse("50Mi")), // 650Mi
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pod1: newPodStatsFunc(pod1, resource.MustParse("50Mi"), resource.MustParse("100Mi"), resource.MustParse("250Mi")), // 400Mi
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pod2: newPodStatsFunc(pod2, resource.MustParse("60Mi"), resource.MustParse("30Mi"), resource.MustParse("10Mi")), // 100Mi
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pod3: newPodStatsFunc(pod3, resource.MustParse("150Mi"), resource.MustParse("150Mi"), resource.MustParse("50Mi")), // 350Mi
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pod4: newPodStatsFunc(pod4, resource.MustParse("10Mi"), resource.MustParse("40Mi"), resource.MustParse("100Mi")), // 150Mi
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}
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statsFn := func(pod *v1.Pod) (statsapi.PodStats, bool) {
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result, found := stats[pod]
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return result, found
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}
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pods := []*v1.Pod{pod1, pod2, pod3, pod4, pod5, pod6}
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orderedBy(qosComparator, disk(statsFn, []fsStatsType{fsStatsRoot, fsStatsLogs, fsStatsLocalVolumeSource}, orderedByResource)).Sort(pods)
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expected := []*v1.Pod{pod2, pod1, pod4, pod3, pod6, pod5}
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pods := []*v1.Pod{pod4, pod3, pod2, pod1}
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orderedBy(priority, disk(statsFn, []fsStatsType{fsStatsRoot, fsStatsLogs, fsStatsLocalVolumeSource}, orderedByResource)).Sort(pods)
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expected := []*v1.Pod{pod1, pod2, pod3, pod4}
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for i := range expected {
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if pods[i] != expected[i] {
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t.Errorf("Expected pod[%d]: %s, but got: %s", i, expected[i].Name, pods[i].Name)
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@@ -610,22 +624,22 @@ func testOrderedByQoSResource(t *testing.T, orderedByResource v1.ResourceName,
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// TestOrderedByMemory ensures we order pods by greediest memory consumer relative to request.
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func TestOrderedByMemory(t *testing.T) {
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pod1 := newPod("best-effort-high", []v1.Container{
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pod1 := newPod("best-effort-high", defaultPriority, []v1.Container{
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newContainer("best-effort-high", newResourceList("", ""), newResourceList("", "")),
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}, nil)
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pod2 := newPod("best-effort-low", []v1.Container{
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pod2 := newPod("best-effort-low", defaultPriority, []v1.Container{
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newContainer("best-effort-low", newResourceList("", ""), newResourceList("", "")),
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}, nil)
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pod3 := newPod("burstable-high", []v1.Container{
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pod3 := newPod("burstable-high", defaultPriority, []v1.Container{
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newContainer("burstable-high", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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}, nil)
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pod4 := newPod("burstable-low", []v1.Container{
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pod4 := newPod("burstable-low", defaultPriority, []v1.Container{
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newContainer("burstable-low", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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}, nil)
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pod5 := newPod("guaranteed-high", []v1.Container{
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pod5 := newPod("guaranteed-high", defaultPriority, []v1.Container{
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newContainer("guaranteed-high", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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}, nil)
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pod6 := newPod("guaranteed-low", []v1.Container{
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pod6 := newPod("guaranteed-low", defaultPriority, []v1.Container{
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newContainer("guaranteed-low", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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}, nil)
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stats := map[*v1.Pod]statsapi.PodStats{
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@@ -650,41 +664,51 @@ func TestOrderedByMemory(t *testing.T) {
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}
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}
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// TestOrderedByQoSMemory ensures we order by qosComparator and then memory consumption relative to request.
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func TestOrderedByQoSMemory(t *testing.T) {
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pod1 := newPod("best-effort-high", []v1.Container{
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newContainer("best-effort-high", newResourceList("", ""), newResourceList("", "")),
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// TestOrderedByPriorityMemory ensures we order by priority and then memory consumption relative to request.
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func TestOrderedByPriorityMemory(t *testing.T) {
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enablePodPriority(true)
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pod1 := newPod("above-requests-low-priority-high-usage", lowPriority, []v1.Container{
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newContainer("above-requests-low-priority-high-usage", newResourceList("", ""), newResourceList("", "")),
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}, nil)
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pod2 := newPod("best-effort-low", []v1.Container{
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newContainer("best-effort-low", newResourceList("", ""), newResourceList("", "")),
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pod2 := newPod("above-requests-low-priority-low-usage", lowPriority, []v1.Container{
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newContainer("above-requests-low-priority-low-usage", newResourceList("", ""), newResourceList("", "")),
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}, nil)
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pod3 := newPod("burstable-high", []v1.Container{
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newContainer("burstable-high", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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pod3 := newPod("above-requests-high-priority-high-usage", highPriority, []v1.Container{
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newContainer("above-requests-high-priority-high-usage", newResourceList("", "100Mi"), newResourceList("", "")),
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}, nil)
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pod4 := newPod("burstable-low", []v1.Container{
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newContainer("burstable-low", newResourceList("100m", "100Mi"), newResourceList("200m", "1Gi")),
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pod4 := newPod("above-requests-high-priority-low-usage", highPriority, []v1.Container{
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newContainer("above-requests-high-priority-low-usage", newResourceList("", "100Mi"), newResourceList("", "")),
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}, nil)
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pod5 := newPod("guaranteed-high", []v1.Container{
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newContainer("guaranteed-high", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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pod5 := newPod("below-requests-low-priority-high-usage", lowPriority, []v1.Container{
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newContainer("below-requests-low-priority-high-usage", newResourceList("", "1Gi"), newResourceList("", "")),
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}, nil)
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pod6 := newPod("guaranteed-low", []v1.Container{
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newContainer("guaranteed-low", newResourceList("100m", "1Gi"), newResourceList("100m", "1Gi")),
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pod6 := newPod("below-requests-low-priority-low-usage", lowPriority, []v1.Container{
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newContainer("below-requests-low-priority-low-usage", newResourceList("", "1Gi"), newResourceList("", "")),
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}, nil)
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pod7 := newPod("below-requests-high-priority-high-usage", highPriority, []v1.Container{
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newContainer("below-requests-high-priority-high-usage", newResourceList("", "1Gi"), newResourceList("", "")),
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}, nil)
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pod8 := newPod("below-requests-high-priority-low-usage", highPriority, []v1.Container{
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newContainer("below-requests-high-priority-low-usage", newResourceList("", "1Gi"), newResourceList("", "")),
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}, nil)
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stats := map[*v1.Pod]statsapi.PodStats{
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pod1: newPodMemoryStats(pod1, resource.MustParse("500Mi")), // 500 relative to request
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pod2: newPodMemoryStats(pod2, resource.MustParse("50Mi")), // 50 relative to request
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pod3: newPodMemoryStats(pod3, resource.MustParse("50Mi")), // -50 relative to request
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pod4: newPodMemoryStats(pod4, resource.MustParse("300Mi")), // 200 relative to request
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pod3: newPodMemoryStats(pod3, resource.MustParse("600Mi")), // 500 relative to request
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pod4: newPodMemoryStats(pod4, resource.MustParse("150Mi")), // 50 relative to request
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pod5: newPodMemoryStats(pod5, resource.MustParse("800Mi")), // -200 relative to request
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pod6: newPodMemoryStats(pod6, resource.MustParse("200Mi")), // -800 relative to request
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pod7: newPodMemoryStats(pod7, resource.MustParse("800Mi")), // -200 relative to request
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pod8: newPodMemoryStats(pod8, resource.MustParse("200Mi")), // -800 relative to request
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}
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statsFn := func(pod *v1.Pod) (statsapi.PodStats, bool) {
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result, found := stats[pod]
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return result, found
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}
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pods := []*v1.Pod{pod1, pod2, pod3, pod4, pod5, pod6}
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expected := []*v1.Pod{pod1, pod2, pod4, pod3, pod5, pod6}
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orderedBy(qosComparator, memory(statsFn)).Sort(pods)
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pods := []*v1.Pod{pod8, pod7, pod6, pod5, pod4, pod3, pod2, pod1}
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// pods := []*v1.Pod{pod1, pod2, pod3, pod4, pod5, pod6, pod7, pod8}
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expected := []*v1.Pod{pod1, pod2, pod3, pod4, pod5, pod6, pod7, pod8}
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orderedBy(exceedMemoryRequests(statsFn), priority, memory(statsFn)).Sort(pods)
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for i := range expected {
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if pods[i] != expected[i] {
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t.Errorf("Expected pod[%d]: %s, but got: %s", i, expected[i].Name, pods[i].Name)
|
||||
@@ -1640,7 +1664,7 @@ func newVolume(name string, volumeSource v1.VolumeSource) v1.Volume {
|
||||
}
|
||||
|
||||
// newPod uses the name as the uid. Make names unique for testing.
|
||||
func newPod(name string, containers []v1.Container, volumes []v1.Volume) *v1.Pod {
|
||||
func newPod(name string, priority int32, containers []v1.Container, volumes []v1.Volume) *v1.Pod {
|
||||
return &v1.Pod{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: name,
|
||||
@@ -1649,6 +1673,7 @@ func newPod(name string, containers []v1.Container, volumes []v1.Volume) *v1.Pod
|
||||
Spec: v1.PodSpec{
|
||||
Containers: containers,
|
||||
Volumes: volumes,
|
||||
Priority: &priority,
|
||||
},
|
||||
}
|
||||
}
|
||||
@@ -1684,3 +1709,7 @@ func (s1 thresholdList) Equal(s2 thresholdList) bool {
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
func enablePodPriority(enabled bool) {
|
||||
utilfeature.DefaultFeatureGate.Set(fmt.Sprintf("%s=%t", features.PodPriority, enabled))
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user