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Merge pull request #11151 from gmarek/max_pods_e2e
Auto commit by PR queue bot
This commit is contained in:
Alex Mohr
commit
2d81775a2d
@ -105,6 +105,7 @@ GCE_PARALLEL_SKIP_TESTS=(
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"Nodes\sNetwork"
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"Nodes\sNetwork"
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"Nodes\sResize"
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"Nodes\sResize"
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"MaxPods"
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"MaxPods"
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"SchedulerPredicates"
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"Services.*restarting"
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"Services.*restarting"
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"Shell.*services"
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"Shell.*services"
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)
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)
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@ -1,159 +0,0 @@
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/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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|
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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||||||
See the License for the specific language governing permissions and
|
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limitations under the License.
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*/
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package e2e
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import (
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"fmt"
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"strconv"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("MaxPods", func() {
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var c *client.Client
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var nodeCount int
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var totalPodCapacity int64
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var RCName string
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var ns string
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var uuid string
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BeforeEach(func() {
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var err error
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c, err = loadClient()
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expectNoError(err)
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nodes, err := c.Nodes().List(labels.Everything(), fields.Everything())
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expectNoError(err)
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nodeCount = len(nodes.Items)
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Expect(nodeCount).NotTo(BeZero())
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totalPodCapacity = 0
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for _, node := range nodes.Items {
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podCapacity, found := node.Status.Capacity["pods"]
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Expect(found).To(Equal(true))
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totalPodCapacity += podCapacity.Value()
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}
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err = deleteTestingNS(c)
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expectNoError(err)
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nsForTesting, err := createTestingNS("maxp", c)
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ns = nsForTesting.Name
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expectNoError(err)
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uuid = string(util.NewUUID())
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})
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AfterEach(func() {
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rc, err := c.ReplicationControllers(ns).Get(RCName)
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if err == nil && rc.Spec.Replicas != 0 {
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By("Cleaning up the replication controller")
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err := DeleteRC(c, ns, RCName)
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expectNoError(err)
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}
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By(fmt.Sprintf("Destroying namespace for this suite %v", ns))
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if err := c.Namespaces().Delete(ns); err != nil {
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Failf("Couldn't delete ns %s", err)
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}
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})
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// This test verifies that max-pods flag works as advertised. It assumes that cluster add-on pods stay stable
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// and cannot be run in parallel with any other test that touches Nodes or Pods. It is so because to check
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// if max-pods is working we need to fully saturate the cluster and keep it in this state for few seconds.
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It("Validates MaxPods limit number of pods that are allowed to run.", func() {
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pods, err := c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
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expectNoError(err)
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currentlyRunningPods := len(pods.Items)
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podsNeededForSaturation := int(totalPodCapacity) - currentlyRunningPods
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RCName = "max-pods" + strconv.FormatInt(totalPodCapacity, 10) + "-" + uuid
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config := RCConfig{Client: c,
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Image: "gcr.io/google_containers/pause:go",
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Name: RCName,
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Namespace: ns,
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PollInterval: 10 * time.Second,
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Replicas: int(podsNeededForSaturation),
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}
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By(fmt.Sprintf("Starting additional %v Pods to fully saturate the cluster and trying to start a new one", podsNeededForSaturation))
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expectNoError(RunRC(config))
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// Log the amount of pods running in the cluster.
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// TODO: remove when test is fixed.
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pods, err = c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Set{
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"status.phase": "Running",
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}.AsSelector())
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Logf("Observed %v running Pods. Need %v to fully saturate the cluster.", len(pods.Items), totalPodCapacity)
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_, err = c.Pods(ns).Create(&api.Pod{
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TypeMeta: api.TypeMeta{
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Kind: "Pod",
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},
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ObjectMeta: api.ObjectMeta{
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Name: "additional-pod",
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Labels: map[string]string{"name": "additional"},
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Name: "additional-pod",
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Image: "gcr.io/google_containers/pause:go",
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},
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},
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},
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})
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expectNoError(err)
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// Wait a bit to allow scheduler to do its thing
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time.Sleep(10 * time.Second)
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allPods, err := c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
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expectNoError(err)
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runningPods := 0
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notRunningPods := make([]api.Pod, 0)
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for _, pod := range allPods.Items {
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if pod.Status.Phase == api.PodRunning {
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runningPods += 1
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} else {
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notRunningPods = append(notRunningPods, pod)
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}
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}
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schedEvents, err := c.Events(ns).List(
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labels.Everything(),
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fields.Set{
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"involvedObject.kind": "Pod",
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"involvedObject.name": "additional-pod",
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"involvedObject.namespace": ns,
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"source": "scheduler",
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"reason": "failedScheduling",
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}.AsSelector())
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expectNoError(err)
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Expect(runningPods).To(Equal(int(totalPodCapacity)))
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Expect(len(notRunningPods)).To(Equal(1))
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Expect(schedEvents.Items).ToNot(BeEmpty())
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Expect(notRunningPods[0].Name).To(Equal("additional-pod"))
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})
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})
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336
test/e2e/scheduler_predicates.go
Normal file
336
test/e2e/scheduler_predicates.go
Normal file
@ -0,0 +1,336 @@
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/*
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|
Copyright 2015 The Kubernetes Authors All rights reserved.
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||||||
|
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||||||
|
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
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|
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|
import (
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|
"fmt"
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|
"time"
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||||||
|
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|
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/resource"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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|
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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|
)
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|
// Simplified version of RunRC, that does not create RC, but creates plain Pods and
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|
// requires passing whole Pod definition, which is needed to test various Scheduler predicates.
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|
func startPods(c *client.Client, replicas int, ns string, podNamePrefix string, pod api.Pod) {
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pods, err := c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
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|
expectNoError(err)
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|
podsRunningBefore := len(pods.Items)
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|
for i := 0; i < replicas; i++ {
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podName := fmt.Sprintf("%v-%v", podNamePrefix, i)
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|
pod.ObjectMeta.Name = podName
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|
pod.ObjectMeta.Labels["name"] = podName
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|
pod.Spec.Containers[0].Name = podName
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|
_, err = c.Pods(ns).Create(&pod)
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|
expectNoError(err)
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|
}
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|
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|
// Wait for pods to start running.
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|
timeout := 2 * time.Minute
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|
startTime := time.Now()
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|
currentlyRunningPods := 0
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|
for podsRunningBefore+replicas != currentlyRunningPods {
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|
allPods, err := c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
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|
expectNoError(err)
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|
runningPods := 0
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|
for _, pod := range allPods.Items {
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|
if pod.Status.Phase == api.PodRunning {
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|
runningPods += 1
|
||||||
|
}
|
||||||
|
}
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|
currentlyRunningPods = runningPods
|
||||||
|
if startTime.Add(timeout).Before(time.Now()) {
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|
break
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||||||
|
}
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||||||
|
time.Sleep(5 * time.Second)
|
||||||
|
}
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||||||
|
Expect(currentlyRunningPods).To(Equal(podsRunningBefore + replicas))
|
||||||
|
}
|
||||||
|
|
||||||
|
func getRequestedCPU(pod api.Pod) int64 {
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||||||
|
var result int64
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|
for _, container := range pod.Spec.Containers {
|
||||||
|
result += container.Resources.Limits.Cpu().MilliValue()
|
||||||
|
}
|
||||||
|
return result
|
||||||
|
}
|
||||||
|
|
||||||
|
func verifyResult(c *client.Client, podName string, ns string) {
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||||||
|
allPods, err := c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
|
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|
expectNoError(err)
|
||||||
|
runningPods := 0
|
||||||
|
notRunningPods := make([]api.Pod, 0)
|
||||||
|
for _, pod := range allPods.Items {
|
||||||
|
if pod.Status.Phase == api.PodRunning {
|
||||||
|
runningPods += 1
|
||||||
|
} else {
|
||||||
|
notRunningPods = append(notRunningPods, pod)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
schedEvents, err := c.Events(ns).List(
|
||||||
|
labels.Everything(),
|
||||||
|
fields.Set{
|
||||||
|
"involvedObject.kind": "Pod",
|
||||||
|
"involvedObject.name": podName,
|
||||||
|
"involvedObject.namespace": ns,
|
||||||
|
"source": "scheduler",
|
||||||
|
"reason": "failedScheduling",
|
||||||
|
}.AsSelector())
|
||||||
|
expectNoError(err)
|
||||||
|
|
||||||
|
printed := false
|
||||||
|
printOnce := func(msg string) string {
|
||||||
|
if !printed {
|
||||||
|
printed = true
|
||||||
|
return msg
|
||||||
|
} else {
|
||||||
|
return ""
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
Expect(len(notRunningPods)).To(Equal(1), printOnce(fmt.Sprintf("Pods found in the cluster: %#v", allPods)))
|
||||||
|
Expect(schedEvents.Items).ToNot(BeEmpty(), printOnce(fmt.Sprintf("Pods found in the cluster: %#v", allPods)))
|
||||||
|
Expect(notRunningPods[0].Name).To(Equal(podName), printOnce(fmt.Sprintf("Pods found in the cluster: %#v", allPods)))
|
||||||
|
}
|
||||||
|
|
||||||
|
var _ = Describe("SchedulerPredicates", func() {
|
||||||
|
var c *client.Client
|
||||||
|
var nodeList *api.NodeList
|
||||||
|
var nodeCount int
|
||||||
|
var totalPodCapacity int64
|
||||||
|
var RCName string
|
||||||
|
var ns string
|
||||||
|
var uuid string
|
||||||
|
|
||||||
|
BeforeEach(func() {
|
||||||
|
var err error
|
||||||
|
c, err = loadClient()
|
||||||
|
expectNoError(err)
|
||||||
|
nodeList, err = c.Nodes().List(labels.Everything(), fields.Everything())
|
||||||
|
expectNoError(err)
|
||||||
|
nodeCount = len(nodeList.Items)
|
||||||
|
Expect(nodeCount).NotTo(BeZero())
|
||||||
|
|
||||||
|
err = deleteTestingNS(c)
|
||||||
|
expectNoError(err)
|
||||||
|
|
||||||
|
nsForTesting, err := createTestingNS("sched-pred", c)
|
||||||
|
ns = nsForTesting.Name
|
||||||
|
expectNoError(err)
|
||||||
|
uuid = string(util.NewUUID())
|
||||||
|
})
|
||||||
|
|
||||||
|
AfterEach(func() {
|
||||||
|
rc, err := c.ReplicationControllers(ns).Get(RCName)
|
||||||
|
if err == nil && rc.Spec.Replicas != 0 {
|
||||||
|
By("Cleaning up the replication controller")
|
||||||
|
err := DeleteRC(c, ns, RCName)
|
||||||
|
expectNoError(err)
|
||||||
|
}
|
||||||
|
|
||||||
|
By(fmt.Sprintf("Destroying namespace for this suite %v", ns))
|
||||||
|
if err := c.Namespaces().Delete(ns); err != nil {
|
||||||
|
Failf("Couldn't delete ns %s", err)
|
||||||
|
}
|
||||||
|
})
|
||||||
|
|
||||||
|
// This test verifies that max-pods flag works as advertised. It assumes that cluster add-on pods stay stable
|
||||||
|
// and cannot be run in parallel with any other test that touches Nodes or Pods. It is so because to check
|
||||||
|
// if max-pods is working we need to fully saturate the cluster and keep it in this state for few seconds.
|
||||||
|
It("validates MaxPods limit number of pods that are allowed to run.", func() {
|
||||||
|
totalPodCapacity = 0
|
||||||
|
|
||||||
|
for _, node := range nodeList.Items {
|
||||||
|
podCapacity, found := node.Status.Capacity["pods"]
|
||||||
|
Expect(found).To(Equal(true))
|
||||||
|
totalPodCapacity += podCapacity.Value()
|
||||||
|
Logf("Node: %v", node)
|
||||||
|
}
|
||||||
|
|
||||||
|
pods, err := c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
|
||||||
|
expectNoError(err)
|
||||||
|
currentlyRunningPods := len(pods.Items)
|
||||||
|
podsNeededForSaturation := int(totalPodCapacity) - currentlyRunningPods
|
||||||
|
|
||||||
|
By(fmt.Sprintf("Starting additional %v Pods to fully saturate the cluster max pods and trying to start another one", podsNeededForSaturation))
|
||||||
|
|
||||||
|
startPods(c, podsNeededForSaturation, ns, "maxp", api.Pod{
|
||||||
|
TypeMeta: api.TypeMeta{
|
||||||
|
Kind: "Pod",
|
||||||
|
},
|
||||||
|
ObjectMeta: api.ObjectMeta{
|
||||||
|
Name: "",
|
||||||
|
Labels: map[string]string{"name": ""},
|
||||||
|
},
|
||||||
|
Spec: api.PodSpec{
|
||||||
|
Containers: []api.Container{
|
||||||
|
{
|
||||||
|
Name: "",
|
||||||
|
Image: "gcr.io/google_containers/pause:go",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
})
|
||||||
|
|
||||||
|
podName := "additional-pod"
|
||||||
|
_, err = c.Pods(ns).Create(&api.Pod{
|
||||||
|
TypeMeta: api.TypeMeta{
|
||||||
|
Kind: "Pod",
|
||||||
|
},
|
||||||
|
ObjectMeta: api.ObjectMeta{
|
||||||
|
Name: podName,
|
||||||
|
Labels: map[string]string{"name": "additional"},
|
||||||
|
},
|
||||||
|
Spec: api.PodSpec{
|
||||||
|
Containers: []api.Container{
|
||||||
|
{
|
||||||
|
Name: podName,
|
||||||
|
Image: "gcr.io/google_containers/pause:go",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
})
|
||||||
|
expectNoError(err)
|
||||||
|
// Wait a bit to allow scheduler to do its thing
|
||||||
|
time.Sleep(10 * time.Second)
|
||||||
|
|
||||||
|
verifyResult(c, podName, ns)
|
||||||
|
})
|
||||||
|
|
||||||
|
// This test verifies we don't allow scheduling of pods in a way that sum of limits of pods is greater than machines capacit.
|
||||||
|
// It assumes that cluster add-on pods stay stable and cannot be run in parallel with any other test that touches Nodes or Pods.
|
||||||
|
// It is so because we need to have precise control on what's running in the cluster.
|
||||||
|
It("validates resource limits of pods that are allowed to run.", func() {
|
||||||
|
nodeToCapacityMap := make(map[string]int64)
|
||||||
|
for _, node := range nodeList.Items {
|
||||||
|
capacity, found := node.Status.Capacity["cpu"]
|
||||||
|
Expect(found).To(Equal(true))
|
||||||
|
nodeToCapacityMap[node.Name] = capacity.MilliValue()
|
||||||
|
}
|
||||||
|
|
||||||
|
pods, err := c.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
|
||||||
|
expectNoError(err)
|
||||||
|
for _, pod := range pods.Items {
|
||||||
|
_, found := nodeToCapacityMap[pod.Spec.NodeName]
|
||||||
|
Expect(found).To(Equal(true))
|
||||||
|
Logf("Pod %v requesting capacity %v on Node %v", pod.Name, getRequestedCPU(pod), pod.Spec.NodeName)
|
||||||
|
nodeToCapacityMap[pod.Spec.NodeName] -= getRequestedCPU(pod)
|
||||||
|
}
|
||||||
|
|
||||||
|
var podsNeededForSaturation int
|
||||||
|
for name, leftCapacity := range nodeToCapacityMap {
|
||||||
|
Logf("Node: %v has capacity: %v", name, leftCapacity)
|
||||||
|
podsNeededForSaturation += (int)(leftCapacity / 100)
|
||||||
|
}
|
||||||
|
|
||||||
|
By(fmt.Sprintf("Starting additional %v Pods to fully saturate the cluster CPU and trying to start another one", podsNeededForSaturation))
|
||||||
|
|
||||||
|
startPods(c, podsNeededForSaturation, ns, "overcommit", api.Pod{
|
||||||
|
TypeMeta: api.TypeMeta{
|
||||||
|
Kind: "Pod",
|
||||||
|
},
|
||||||
|
ObjectMeta: api.ObjectMeta{
|
||||||
|
Name: "",
|
||||||
|
Labels: map[string]string{"name": ""},
|
||||||
|
},
|
||||||
|
Spec: api.PodSpec{
|
||||||
|
Containers: []api.Container{
|
||||||
|
{
|
||||||
|
Name: "",
|
||||||
|
Image: "gcr.io/google_containers/pause:go",
|
||||||
|
Resources: api.ResourceRequirements{
|
||||||
|
Limits: api.ResourceList{
|
||||||
|
"cpu": *resource.NewMilliQuantity(100, "DecimalSI"),
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
})
|
||||||
|
|
||||||
|
podName := "additional-pod"
|
||||||
|
_, err = c.Pods(ns).Create(&api.Pod{
|
||||||
|
TypeMeta: api.TypeMeta{
|
||||||
|
Kind: "Pod",
|
||||||
|
},
|
||||||
|
ObjectMeta: api.ObjectMeta{
|
||||||
|
Name: podName,
|
||||||
|
Labels: map[string]string{"name": "additional"},
|
||||||
|
},
|
||||||
|
Spec: api.PodSpec{
|
||||||
|
Containers: []api.Container{
|
||||||
|
{
|
||||||
|
Name: podName,
|
||||||
|
Image: "gcr.io/google_containers/pause:go",
|
||||||
|
Resources: api.ResourceRequirements{
|
||||||
|
Limits: api.ResourceList{
|
||||||
|
"cpu": *resource.NewMilliQuantity(100, "DecimalSI"),
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
})
|
||||||
|
expectNoError(err)
|
||||||
|
// Wait a bit to allow scheduler to do its thing
|
||||||
|
time.Sleep(10 * time.Second)
|
||||||
|
|
||||||
|
verifyResult(c, podName, ns)
|
||||||
|
})
|
||||||
|
|
||||||
|
// Test Nodes does not have any label, hence it should be impossible to schedule Pod with
|
||||||
|
// nonempty Selector set.
|
||||||
|
It("validates that NodeSelector is respected.", func() {
|
||||||
|
By("Trying to schedule Pod with nonempty NodeSelector.")
|
||||||
|
podName := "restricted-pod"
|
||||||
|
|
||||||
|
_, err := c.Pods(ns).Create(&api.Pod{
|
||||||
|
TypeMeta: api.TypeMeta{
|
||||||
|
Kind: "Pod",
|
||||||
|
},
|
||||||
|
ObjectMeta: api.ObjectMeta{
|
||||||
|
Name: podName,
|
||||||
|
Labels: map[string]string{"name": "restricted"},
|
||||||
|
},
|
||||||
|
Spec: api.PodSpec{
|
||||||
|
Containers: []api.Container{
|
||||||
|
{
|
||||||
|
Name: podName,
|
||||||
|
Image: "gcr.io/google_containers/pause:go",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
NodeSelector: map[string]string{
|
||||||
|
"label": "nonempty",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
})
|
||||||
|
expectNoError(err)
|
||||||
|
// Wait a bit to allow scheduler to do its thing
|
||||||
|
time.Sleep(10 * time.Second)
|
||||||
|
|
||||||
|
verifyResult(c, podName, ns)
|
||||||
|
})
|
||||||
|
})
|
||||||
Loading…
Reference in New Issue
Block a user