mirror of
https://github.com/k3s-io/kubernetes.git
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Add scheduler and pv controller integration test
This commit is contained in:
Michelle Au
parent
2231246fa5
commit
f5ec326e7a
494
test/integration/scheduler/volume_binding_test.go
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494
test/integration/scheduler/volume_binding_test.go
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@ -0,0 +1,494 @@
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/*
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Copyright 2017 The Kubernetes Authors.
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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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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 scheduler
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// This file tests the VolumeScheduling feature.
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import (
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"fmt"
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"net/http"
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"net/http/httptest"
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"testing"
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"time"
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"github.com/golang/glog"
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"k8s.io/api/core/v1"
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storagev1 "k8s.io/api/storage/v1"
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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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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/client-go/informers"
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clientset "k8s.io/client-go/kubernetes"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/tools/record"
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"k8s.io/kubernetes/pkg/api/testapi"
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"k8s.io/kubernetes/pkg/apis/core/v1/helper"
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"k8s.io/kubernetes/pkg/controller/volume/persistentvolume"
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"k8s.io/kubernetes/plugin/pkg/scheduler"
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"k8s.io/kubernetes/plugin/pkg/scheduler/factory"
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"k8s.io/kubernetes/test/integration/framework"
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)
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type testConfig struct {
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client clientset.Interface
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ns string
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stop <-chan struct{}
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teardown func()
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}
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var (
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// Delete API objects immediately
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deletePeriod = int64(0)
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deleteOption = &metav1.DeleteOptions{GracePeriodSeconds: &deletePeriod}
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modeWait = storagev1.VolumeBindingWaitForFirstConsumer
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modeImmediate = storagev1.VolumeBindingImmediate
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classWait = "wait"
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classImmediate = "immediate"
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)
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const (
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labelKey = "test-label"
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labelValue = "test-value"
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nodeName = "node1"
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podLimit = 100
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volsPerPod = 5
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)
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func TestVolumeBinding(t *testing.T) {
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config := setup(t, "volume-scheduling")
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defer config.teardown()
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cases := map[string]struct {
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pod *v1.Pod
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pvs []*v1.PersistentVolume
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pvcs []*v1.PersistentVolumeClaim
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}{
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"immediate can bind": {
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pod: makePod("pod-i-canbind", config.ns, []string{"pvc-i-canbind"}),
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pvs: []*v1.PersistentVolume{makePV(t, "pv-i-canbind", classImmediate, "", "")},
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pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-i-canbind", config.ns, &classImmediate, "")},
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},
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"immediate pvc prebound": {
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pod: makePod("pod-i-pvc-prebound", config.ns, []string{"pvc-i-prebound"}),
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pvs: []*v1.PersistentVolume{makePV(t, "pv-i-pvc-prebound", classImmediate, "", "")},
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pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-i-prebound", config.ns, &classImmediate, "pv-i-pvc-prebound")},
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},
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"immediate pv prebound": {
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pod: makePod("pod-i-pv-prebound", config.ns, []string{"pvc-i-pv-prebound"}),
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pvs: []*v1.PersistentVolume{makePV(t, "pv-i-prebound", classImmediate, "pvc-i-pv-prebound", config.ns)},
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pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-i-pv-prebound", config.ns, &classImmediate, "")},
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},
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"wait can bind": {
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pod: makePod("pod-w-canbind", config.ns, []string{"pvc-w-canbind"}),
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pvs: []*v1.PersistentVolume{makePV(t, "pv-w-canbind", classWait, "", "")},
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pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-w-canbind", config.ns, &classWait, "")},
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},
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"wait pvc prebound": {
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pod: makePod("pod-w-pvc-prebound", config.ns, []string{"pvc-w-prebound"}),
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pvs: []*v1.PersistentVolume{makePV(t, "pv-w-pvc-prebound", classWait, "", "")},
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pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-w-prebound", config.ns, &classWait, "pv-w-pvc-prebound")},
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},
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"wait pv prebound": {
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pod: makePod("pod-w-pv-prebound", config.ns, []string{"pvc-w-pv-prebound"}),
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pvs: []*v1.PersistentVolume{makePV(t, "pv-w-prebound", classWait, "pvc-w-pv-prebound", config.ns)},
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pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-w-pv-prebound", config.ns, &classWait, "")},
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},
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"wait can bind two": {
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pod: makePod("pod-w-canbind-2", config.ns, []string{"pvc-w-canbind-2", "pvc-w-canbind-3"}),
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pvs: []*v1.PersistentVolume{
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makePV(t, "pv-w-canbind-2", classWait, "", ""),
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makePV(t, "pv-w-canbind-3", classWait, "", ""),
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},
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pvcs: []*v1.PersistentVolumeClaim{
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makePVC("pvc-w-canbind-2", config.ns, &classWait, ""),
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makePVC("pvc-w-canbind-3", config.ns, &classWait, ""),
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},
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},
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"mix immediate and wait": {
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pod: makePod("pod-mix-bound", config.ns, []string{"pvc-w-canbind-4", "pvc-i-canbind-2"}),
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pvs: []*v1.PersistentVolume{
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makePV(t, "pv-w-canbind-4", classWait, "", ""),
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makePV(t, "pv-i-canbind-2", classImmediate, "", ""),
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},
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pvcs: []*v1.PersistentVolumeClaim{
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makePVC("pvc-w-canbind-4", config.ns, &classWait, ""),
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makePVC("pvc-i-canbind-2", config.ns, &classImmediate, ""),
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},
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},
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// TODO:
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// immediate mode - PVC cannot bound
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// wait mode - PVC cannot bind
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// wait mode - 2 PVCs, 1 cannot bind
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}
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for name, test := range cases {
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glog.Infof("Running test %v", name)
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// Create PVs
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for _, pv := range test.pvs {
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if _, err := config.client.CoreV1().PersistentVolumes().Create(pv); err != nil {
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t.Fatalf("Failed to create PersistentVolume %q: %v", pv.Name, err)
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}
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}
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// Create PVCs
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for _, pvc := range test.pvcs {
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if _, err := config.client.CoreV1().PersistentVolumeClaims(config.ns).Create(pvc); err != nil {
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t.Fatalf("Failed to create PersistentVolumeClaim %q: %v", pvc.Name, err)
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}
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}
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// Create Pod
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if _, err := config.client.CoreV1().Pods(config.ns).Create(test.pod); err != nil {
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t.Fatalf("Failed to create Pod %q: %v", test.pod.Name, err)
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}
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if err := waitForPodToSchedule(config.client, test.pod); err != nil {
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t.Errorf("Failed to schedule Pod %q: %v", test.pod.Name, err)
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}
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// Validate PVC/PV binding
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for _, pvc := range test.pvcs {
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validatePVCPhase(t, config.client, pvc, v1.ClaimBound)
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}
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for _, pv := range test.pvs {
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validatePVPhase(t, config.client, pv, v1.VolumeBound)
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}
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// TODO: validate events on Pods and PVCs
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config.client.CoreV1().Pods(config.ns).DeleteCollection(deleteOption, metav1.ListOptions{})
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config.client.CoreV1().PersistentVolumeClaims(config.ns).DeleteCollection(deleteOption, metav1.ListOptions{})
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config.client.CoreV1().PersistentVolumes().DeleteCollection(deleteOption, metav1.ListOptions{})
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}
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}
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// TestVolumeBindingStress creates <podLimit> pods, each with <volsPerPod> unbound PVCs.
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func TestVolumeBindingStress(t *testing.T) {
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config := setup(t, "volume-binding-stress")
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defer config.teardown()
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// Create enough PVs and PVCs for all the pods
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pvs := []*v1.PersistentVolume{}
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pvcs := []*v1.PersistentVolumeClaim{}
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for i := 0; i < podLimit*volsPerPod; i++ {
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pv := makePV(t, fmt.Sprintf("pv-stress-%v", i), classWait, "", "")
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pvc := makePVC(fmt.Sprintf("pvc-stress-%v", i), config.ns, &classWait, "")
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if pv, err := config.client.CoreV1().PersistentVolumes().Create(pv); err != nil {
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t.Fatalf("Failed to create PersistentVolume %q: %v", pv.Name, err)
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}
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if pvc, err := config.client.CoreV1().PersistentVolumeClaims(config.ns).Create(pvc); err != nil {
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t.Fatalf("Failed to create PersistentVolumeClaim %q: %v", pvc.Name, err)
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}
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pvs = append(pvs, pv)
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pvcs = append(pvcs, pvc)
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}
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pods := []*v1.Pod{}
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for i := 0; i < podLimit; i++ {
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// Generate string of all the PVCs for the pod
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podPvcs := []string{}
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for j := i * volsPerPod; j < (i+1)*volsPerPod; j++ {
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podPvcs = append(podPvcs, pvcs[j].Name)
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}
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pod := makePod(fmt.Sprintf("pod%v", i), config.ns, podPvcs)
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if pod, err := config.client.CoreV1().Pods(config.ns).Create(pod); err != nil {
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t.Fatalf("Failed to create Pod %q: %v", pod.Name, err)
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}
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pods = append(pods, pod)
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}
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// Validate Pods scheduled
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for _, pod := range pods {
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if err := waitForPodToSchedule(config.client, pod); err != nil {
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t.Errorf("Failed to schedule Pod %q: %v", pod.Name, err)
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}
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}
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// Validate PVC/PV binding
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for _, pvc := range pvcs {
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validatePVCPhase(t, config.client, pvc, v1.ClaimBound)
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}
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for _, pv := range pvs {
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validatePVPhase(t, config.client, pv, v1.VolumeBound)
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}
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// TODO: validate events on Pods and PVCs
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}
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func setup(t *testing.T, nsName string) *testConfig {
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h := &framework.MasterHolder{Initialized: make(chan struct{})}
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s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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<-h.Initialized
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h.M.GenericAPIServer.Handler.ServeHTTP(w, req)
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}))
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// Enable feature gates
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utilfeature.DefaultFeatureGate.Set("VolumeScheduling=true,PersistentLocalVolumes=true")
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// Build clientset and informers for controllers.
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clientset := clientset.NewForConfigOrDie(&restclient.Config{QPS: -1, Host: s.URL, ContentConfig: restclient.ContentConfig{GroupVersion: testapi.Groups[v1.GroupName].GroupVersion()}})
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informers := informers.NewSharedInformerFactory(clientset, time.Second)
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// Start master
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masterConfig := framework.NewIntegrationTestMasterConfig()
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_, _, closeFn := framework.RunAMasterUsingServer(masterConfig, s, h)
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ns := framework.CreateTestingNamespace(nsName, s, t).Name
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controllerCh := make(chan struct{})
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// Start PV controller for volume binding.
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params := persistentvolume.ControllerParameters{
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KubeClient: clientset,
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SyncPeriod: time.Hour, // test shouldn't need to resync
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VolumePlugins: nil, // TODO; need later for dynamic provisioning
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Cloud: nil,
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ClusterName: "volume-test-cluster",
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VolumeInformer: informers.Core().V1().PersistentVolumes(),
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ClaimInformer: informers.Core().V1().PersistentVolumeClaims(),
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ClassInformer: informers.Storage().V1().StorageClasses(),
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EventRecorder: nil, // TODO: add one so we can test PV events
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EnableDynamicProvisioning: true,
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}
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ctrl, err := persistentvolume.NewController(params)
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if err != nil {
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t.Fatalf("Failed to create PV controller: %v", err)
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}
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go ctrl.Run(controllerCh)
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// Start scheduler
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configurator := factory.NewConfigFactory(
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v1.DefaultSchedulerName,
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clientset,
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informers.Core().V1().Nodes(),
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informers.Core().V1().Pods(),
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informers.Core().V1().PersistentVolumes(),
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informers.Core().V1().PersistentVolumeClaims(),
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informers.Core().V1().ReplicationControllers(),
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informers.Extensions().V1beta1().ReplicaSets(),
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informers.Apps().V1beta1().StatefulSets(),
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informers.Core().V1().Services(),
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informers.Policy().V1beta1().PodDisruptionBudgets(),
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informers.Storage().V1().StorageClasses(),
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v1.DefaultHardPodAffinitySymmetricWeight,
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true, // Enable EqualCache by default.
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)
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sched, err := scheduler.NewFromConfigurator(configurator, func(cfg *scheduler.Config) {
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cfg.StopEverything = controllerCh
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cfg.Recorder = &record.FakeRecorder{}
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})
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if err != nil {
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t.Fatalf("Failed to create scheduler: %v.", err)
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}
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go sched.Run()
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// Waiting for all controller sync.
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informers.Start(controllerCh)
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informers.WaitForCacheSync(controllerCh)
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// Create shared objects
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// Create node
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testNode := &v1.Node{
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ObjectMeta: metav1.ObjectMeta{
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Name: nodeName,
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Labels: map[string]string{labelKey: labelValue},
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},
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Spec: v1.NodeSpec{Unschedulable: false},
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Status: v1.NodeStatus{
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Capacity: v1.ResourceList{
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v1.ResourcePods: *resource.NewQuantity(podLimit, resource.DecimalSI),
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},
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Conditions: []v1.NodeCondition{
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{
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Type: v1.NodeReady,
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Status: v1.ConditionTrue,
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Reason: fmt.Sprintf("schedulable condition"),
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LastHeartbeatTime: metav1.Time{Time: time.Now()},
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},
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},
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},
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}
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if _, err := clientset.CoreV1().Nodes().Create(testNode); err != nil {
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t.Fatalf("Failed to create Node %q: %v", testNode.Name, err)
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}
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// Create SCs
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scs := []*storagev1.StorageClass{
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makeStorageClass(classWait, &modeWait),
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makeStorageClass(classImmediate, &modeImmediate),
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}
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for _, sc := range scs {
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if _, err := clientset.StorageV1().StorageClasses().Create(sc); err != nil {
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t.Fatalf("Failed to create StorageClass %q: %v", sc.Name, err)
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}
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}
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return &testConfig{
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client: clientset,
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ns: ns,
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stop: controllerCh,
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teardown: func() {
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clientset.CoreV1().Pods(ns).DeleteCollection(nil, metav1.ListOptions{})
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clientset.CoreV1().PersistentVolumeClaims(ns).DeleteCollection(nil, metav1.ListOptions{})
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clientset.CoreV1().PersistentVolumes().DeleteCollection(nil, metav1.ListOptions{})
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clientset.StorageV1().StorageClasses().DeleteCollection(nil, metav1.ListOptions{})
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clientset.CoreV1().Nodes().DeleteCollection(nil, metav1.ListOptions{})
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close(controllerCh)
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closeFn()
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utilfeature.DefaultFeatureGate.Set("VolumeScheduling=false,LocalPersistentVolumes=false")
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},
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}
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}
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func makeStorageClass(name string, mode *storagev1.VolumeBindingMode) *storagev1.StorageClass {
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return &storagev1.StorageClass{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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},
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Provisioner: "kubernetes.io/no-provisioner",
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VolumeBindingMode: mode,
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}
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}
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func makePV(t *testing.T, name, scName, pvcName, ns string) *v1.PersistentVolume {
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pv := &v1.PersistentVolume{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Annotations: map[string]string{},
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},
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Spec: v1.PersistentVolumeSpec{
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Capacity: v1.ResourceList{
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v1.ResourceName(v1.ResourceStorage): resource.MustParse("5Gi"),
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},
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AccessModes: []v1.PersistentVolumeAccessMode{
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v1.ReadWriteOnce,
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},
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StorageClassName: scName,
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PersistentVolumeSource: v1.PersistentVolumeSource{
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Local: &v1.LocalVolumeSource{
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Path: "/test-path",
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},
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},
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},
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}
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if pvcName != "" {
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pv.Spec.ClaimRef = &v1.ObjectReference{Name: pvcName, Namespace: ns}
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}
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testNodeAffinity := &v1.NodeAffinity{
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RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
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NodeSelectorTerms: []v1.NodeSelectorTerm{
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{
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MatchExpressions: []v1.NodeSelectorRequirement{
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{
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Key: labelKey,
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Operator: v1.NodeSelectorOpIn,
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Values: []string{labelValue},
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},
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},
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},
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},
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},
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}
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err := helper.StorageNodeAffinityToAlphaAnnotation(pv.Annotations, testNodeAffinity)
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if err != nil {
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t.Fatalf("Setting storage node affinity failed: %v", err)
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}
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return pv
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}
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func makePVC(name, ns string, scName *string, volumeName string) *v1.PersistentVolumeClaim {
|
||||
return &v1.PersistentVolumeClaim{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: name,
|
||||
Namespace: ns,
|
||||
},
|
||||
Spec: v1.PersistentVolumeClaimSpec{
|
||||
AccessModes: []v1.PersistentVolumeAccessMode{
|
||||
v1.ReadWriteOnce,
|
||||
},
|
||||
Resources: v1.ResourceRequirements{
|
||||
Requests: v1.ResourceList{
|
||||
v1.ResourceName(v1.ResourceStorage): resource.MustParse("5Gi"),
|
||||
},
|
||||
},
|
||||
StorageClassName: scName,
|
||||
VolumeName: volumeName,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func makePod(name, ns string, pvcs []string) *v1.Pod {
|
||||
volumes := []v1.Volume{}
|
||||
for i, pvc := range pvcs {
|
||||
volumes = append(volumes, v1.Volume{
|
||||
Name: fmt.Sprintf("vol%v", i),
|
||||
VolumeSource: v1.VolumeSource{
|
||||
PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
|
||||
ClaimName: pvc,
|
||||
},
|
||||
},
|
||||
})
|
||||
}
|
||||
|
||||
return &v1.Pod{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: name,
|
||||
Namespace: ns,
|
||||
},
|
||||
Spec: v1.PodSpec{
|
||||
Containers: []v1.Container{
|
||||
{
|
||||
Name: "write-pod",
|
||||
Image: "gcr.io/google_containers/busybox:1.24",
|
||||
Command: []string{"/bin/sh"},
|
||||
Args: []string{"-c", "while true; do sleep 1; done"},
|
||||
},
|
||||
},
|
||||
Volumes: volumes,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func validatePVCPhase(t *testing.T, client clientset.Interface, pvc *v1.PersistentVolumeClaim, phase v1.PersistentVolumeClaimPhase) {
|
||||
claim, err := client.CoreV1().PersistentVolumeClaims(pvc.Namespace).Get(pvc.Name, metav1.GetOptions{})
|
||||
if err != nil {
|
||||
t.Errorf("Failed to get PVC %v/%v: %v", pvc.Namespace, pvc.Name, err)
|
||||
}
|
||||
|
||||
if claim.Status.Phase != phase {
|
||||
t.Errorf("PVC %v/%v phase not %v, got %v", pvc.Namespace, pvc.Name, phase, claim.Status.Phase)
|
||||
}
|
||||
}
|
||||
|
||||
func validatePVPhase(t *testing.T, client clientset.Interface, pv *v1.PersistentVolume, phase v1.PersistentVolumePhase) {
|
||||
pv, err := client.CoreV1().PersistentVolumes().Get(pv.Name, metav1.GetOptions{})
|
||||
if err != nil {
|
||||
t.Errorf("Failed to get PV %v: %v", pv.Name, err)
|
||||
}
|
||||
|
||||
if pv.Status.Phase != phase {
|
||||
t.Errorf("PV %v phase not %v, got %v", pv.Name, phase, pv.Status.Phase)
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user