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[e2e] Should spread Pods to schedulable cluster zones

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Some Nodes like control plane ones should not be considered
to spread Pods.

Signed-off-by: Zhecheng Li <zhechengli@microsoft.com>
This commit is contained in:
Zhecheng Li 2022-06-08 16:48:51 +08:00
parent 9a6725aa1d
commit b8b18a0a05
1 changed files with 12 additions and 21 deletions
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33
test/e2e/scheduling/ubernetes_lite.go
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@ -28,6 +28,7 @@ import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/uuid"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/kubernetes/test/e2e/framework"
@ -46,17 +47,20 @@ var _ = SIGDescribe("Multi-AZ Clusters", func() {
var zoneCount int
var err error
var cleanUp func()
var zoneNames sets.String
ginkgo.BeforeEach(func() {
cs := f.ClientSet
if zoneCount <= 0 {
zoneCount, err = getZoneCount(f.ClientSet)
zoneNames, err = e2enode.GetSchedulableClusterZones(cs)
framework.ExpectNoError(err)
zoneCount = len(zoneNames)
}
ginkgo.By(fmt.Sprintf("Checking for multi-zone cluster. Zone count = %d", zoneCount))
msg := fmt.Sprintf("Zone count is %d, only run for multi-zone clusters, skipping test", zoneCount)
ginkgo.By(fmt.Sprintf("Checking for multi-zone cluster. Schedulable zone count = %d", zoneCount))
msg := fmt.Sprintf("Schedulable zone count is %d, only run for multi-zone clusters, skipping test", zoneCount)
e2eskipper.SkipUnlessAtLeast(zoneCount, 2, msg)
// TODO: SkipUnlessDefaultScheduler() // Non-default schedulers might not spread
cs := f.ClientSet
e2enode.WaitForTotalHealthy(cs, time.Minute)
nodeList, err := e2enode.GetReadySchedulableNodes(cs)
framework.ExpectNoError(err)
@ -71,17 +75,17 @@ var _ = SIGDescribe("Multi-AZ Clusters", func() {
}
})
ginkgo.It("should spread the pods of a service across zones [Serial]", func() {
SpreadServiceOrFail(f, 5*zoneCount, imageutils.GetPauseImageName())
SpreadServiceOrFail(f, 5*zoneCount, zoneNames, imageutils.GetPauseImageName())
})
ginkgo.It("should spread the pods of a replication controller across zones [Serial]", func() {
SpreadRCOrFail(f, int32(5*zoneCount), framework.ServeHostnameImage, []string{"serve-hostname"})
SpreadRCOrFail(f, int32(5*zoneCount), zoneNames, framework.ServeHostnameImage, []string{"serve-hostname"})
})
})
// SpreadServiceOrFail check that the pods comprising a service
// get spread evenly across available zones
func SpreadServiceOrFail(f *framework.Framework, replicaCount int, image string) {
func SpreadServiceOrFail(f *framework.Framework, replicaCount int, zoneNames sets.String, image string) {
// First create the service
serviceName := "test-service"
serviceSpec := &v1.Service{
@ -130,8 +134,6 @@ func SpreadServiceOrFail(f *framework.Framework, replicaCount int, image string)
framework.ExpectNoError(err)
// Now make sure they're spread across zones
zoneNames, err := e2enode.GetClusterZones(f.ClientSet)
framework.ExpectNoError(err)
checkZoneSpreading(f.ClientSet, pods, zoneNames.List())
}
@ -146,15 +148,6 @@ func getZoneNameForNode(node v1.Node) (string, error) {
node.Name, v1.LabelFailureDomainBetaZone, v1.LabelTopologyZone)
}
// Return the number of zones in which we have nodes in this cluster.
func getZoneCount(c clientset.Interface) (int, error) {
zoneNames, err := e2enode.GetClusterZones(c)
if err != nil {
return -1, err
}
return len(zoneNames), nil
}
// Find the name of the zone in which the pod is scheduled
func getZoneNameForPod(c clientset.Interface, pod v1.Pod) (string, error) {
ginkgo.By(fmt.Sprintf("Getting zone name for pod %s, on node %s", pod.Name, pod.Spec.NodeName))
@ -195,7 +188,7 @@ func checkZoneSpreading(c clientset.Interface, pods *v1.PodList, zoneNames []str
// SpreadRCOrFail Check that the pods comprising a replication
// controller get spread evenly across available zones
func SpreadRCOrFail(f *framework.Framework, replicaCount int32, image string, args []string) {
func SpreadRCOrFail(f *framework.Framework, replicaCount int32, zoneNames sets.String, image string, args []string) {
name := "ubelite-spread-rc-" + string(uuid.NewUUID())
ginkgo.By(fmt.Sprintf("Creating replication controller %s", name))
controller, err := f.ClientSet.CoreV1().ReplicationControllers(f.Namespace.Name).Create(context.TODO(), &v1.ReplicationController{
@ -244,7 +237,5 @@ func SpreadRCOrFail(f *framework.Framework, replicaCount int32, image string, ar
framework.ExpectNoError(err)
// Now make sure they're spread across zones
zoneNames, err := e2enode.GetClusterZones(f.ClientSet)
framework.ExpectNoError(err)
checkZoneSpreading(f.ClientSet, pods, zoneNames.List())
}