mirror of https://github.com/k3s-io/k3s
109 lines
3.3 KiB
Go
109 lines
3.3 KiB
Go
/*
|
|
Copyright 2016 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 e2e
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"k8s.io/kubernetes/pkg/api"
|
|
"k8s.io/kubernetes/pkg/labels"
|
|
"k8s.io/kubernetes/test/e2e/framework"
|
|
|
|
. "github.com/onsi/ginkgo"
|
|
. "github.com/onsi/gomega"
|
|
)
|
|
|
|
// This test requires Rescheduler to be enabled.
|
|
var _ = framework.KubeDescribe("Rescheduler [Serial]", func() {
|
|
f := framework.NewDefaultFramework("rescheduler")
|
|
var ns string
|
|
var totalMillicores int
|
|
|
|
BeforeEach(func() {
|
|
framework.SkipUnlessProviderIs("gce", "gke")
|
|
ns = f.Namespace.Name
|
|
nodes := framework.GetReadySchedulableNodesOrDie(f.Client)
|
|
nodeCount := len(nodes.Items)
|
|
Expect(nodeCount).NotTo(BeZero())
|
|
|
|
cpu := nodes.Items[0].Status.Capacity[api.ResourceCPU]
|
|
totalMillicores = int((&cpu).MilliValue()) * nodeCount
|
|
})
|
|
|
|
It("should ensure that critical pod is scheduled in case there is no resources available", func() {
|
|
By("reserving all available cpu")
|
|
err := reserveAllCpu(f, "reserve-all-cpu", totalMillicores)
|
|
defer framework.DeleteRCAndPods(f.Client, ns, "reserve-all-cpu")
|
|
framework.ExpectNoError(err)
|
|
|
|
By("creating a new instance of DNS and waiting for DNS to be scheduled")
|
|
label := labels.SelectorFromSet(labels.Set(map[string]string{"k8s-app": "kube-dns"}))
|
|
listOpts := api.ListOptions{LabelSelector: label}
|
|
rcs, err := f.Client.ReplicationControllers(api.NamespaceSystem).List(listOpts)
|
|
framework.ExpectNoError(err)
|
|
Expect(len(rcs.Items)).Should(Equal(1))
|
|
|
|
rc := rcs.Items[0]
|
|
replicas := uint(rc.Spec.Replicas)
|
|
|
|
err = framework.ScaleRC(f.Client, api.NamespaceSystem, rc.Name, replicas+1, true)
|
|
defer framework.ExpectNoError(framework.ScaleRC(f.Client, api.NamespaceSystem, rc.Name, replicas, true))
|
|
framework.ExpectNoError(err)
|
|
})
|
|
})
|
|
|
|
func reserveAllCpu(f *framework.Framework, id string, millicores int) error {
|
|
timeout := 5 * time.Minute
|
|
replicas := millicores / 100
|
|
|
|
ReserveCpu(f, id, 1, 100)
|
|
framework.ExpectNoError(framework.ScaleRC(f.Client, f.Namespace.Name, id, uint(replicas), false))
|
|
|
|
for start := time.Now(); time.Since(start) < timeout; time.Sleep(10 * time.Second) {
|
|
pods, err := framework.GetPodsInNamespace(f.Client, f.Namespace.Name, framework.ImagePullerLabels)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(pods) != replicas {
|
|
continue
|
|
}
|
|
|
|
allRunningOrUnschedulable := true
|
|
for _, pod := range pods {
|
|
if !podRunningOrUnschedulable(pod) {
|
|
allRunningOrUnschedulable = false
|
|
break
|
|
}
|
|
}
|
|
if allRunningOrUnschedulable {
|
|
return nil
|
|
}
|
|
}
|
|
return fmt.Errorf("Pod name %s: Gave up waiting %v for %d pods to come up", id, timeout, replicas)
|
|
}
|
|
|
|
func podRunningOrUnschedulable(pod *api.Pod) bool {
|
|
_, cond := api.GetPodCondition(&pod.Status, api.PodScheduled)
|
|
if cond != nil && cond.Status == api.ConditionFalse && cond.Reason == "Unschedulable" {
|
|
return true
|
|
}
|
|
running, _ := framework.PodRunningReady(pod)
|
|
return running
|
|
}
|