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application_test.go
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application_test.go
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/*
* This file is part of the KubeVirt project
*
* 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.
*
* Copyright 2017 Red Hat, Inc.
*
*/
package watch
import (
"context"
"encoding/json"
"net/http"
"net/http/httptest"
"net/url"
"time"
migrationsv1 "kubevirt.io/api/migrations/v1alpha1"
restful "github.com/emicklei/go-restful"
"github.com/golang/mock/gomock"
. "github.com/onsi/ginkgo"
"github.com/onsi/ginkgo/extensions/table"
. "github.com/onsi/gomega"
"k8s.io/client-go/tools/cache"
"kubevirt.io/kubevirt/pkg/virt-controller/watch/topology"
appsv1 "k8s.io/api/apps/v1"
k8sv1 "k8s.io/api/core/v1"
kubev1 "k8s.io/api/core/v1"
policyv1 "k8s.io/api/policy/v1"
"k8s.io/client-go/tools/record"
io_prometheus_client "github.com/prometheus/client_model/go"
v1 "kubevirt.io/api/core/v1"
snapshotv1 "kubevirt.io/api/snapshot/v1alpha1"
"kubevirt.io/client-go/kubecli"
cdiv1 "kubevirt.io/containerized-data-importer-api/pkg/apis/core/v1beta1"
"kubevirt.io/kubevirt/pkg/controller"
"kubevirt.io/kubevirt/pkg/rest"
testutils "kubevirt.io/kubevirt/pkg/testutils"
"kubevirt.io/kubevirt/pkg/virt-controller/services"
"kubevirt.io/kubevirt/pkg/virt-controller/watch/drain/disruptionbudget"
"kubevirt.io/kubevirt/pkg/virt-controller/watch/drain/evacuation"
"kubevirt.io/kubevirt/pkg/virt-controller/watch/snapshot"
storagev1 "k8s.io/api/storage/v1"
extv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
)
func newValidGetRequest() *http.Request {
request, _ := http.NewRequest("GET", "/leader", nil)
return request
}
var _ = Describe("Application", func() {
var app = VirtControllerApp{}
It("Reports leader prometheus metric when onStartedLeading is called ", func() {
ctrl := gomock.NewController(GinkgoT())
virtClient := kubecli.NewMockKubevirtClient(ctrl)
topologyUpdater := topology.NewMockNodeTopologyUpdater(ctrl)
topologyUpdater.EXPECT().Run(gomock.Any(), gomock.Any())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
vmInformer, _ := testutils.NewFakeInformerFor(&v1.VirtualMachine{})
vmiInformer, _ := testutils.NewFakeInformerFor(&v1.VirtualMachineInstance{})
vmSnapshotInformer, _ := testutils.NewFakeInformerFor(&snapshotv1.VirtualMachineSnapshot{})
vmSnapshotContentInformer, _ := testutils.NewFakeInformerFor(&snapshotv1.VirtualMachineSnapshotContent{})
migrationInformer, _ := testutils.NewFakeInformerFor(&v1.VirtualMachineInstanceMigration{})
nodeInformer, _ := testutils.NewFakeInformerFor(&kubev1.Node{})
recorder := record.NewFakeRecorder(100)
recorder.IncludeObject = true
config, _, _ := testutils.NewFakeClusterConfigUsingKVConfig(&v1.KubeVirtConfiguration{})
pdbInformer, _ := testutils.NewFakeInformerFor(&policyv1.PodDisruptionBudget{})
migrationPolicyInformer, _ := testutils.NewFakeInformerFor(&migrationsv1.MigrationPolicy{})
podInformer, _ := testutils.NewFakeInformerFor(&k8sv1.Pod{})
pvcInformer, _ := testutils.NewFakeInformerFor(&k8sv1.PersistentVolumeClaim{})
crInformer, _ := testutils.NewFakeInformerFor(&appsv1.ControllerRevision{})
dataVolumeInformer, _ := testutils.NewFakeInformerFor(&cdiv1.DataVolume{})
cdiInformer, _ := testutils.NewFakeInformerFor(&cdiv1.DataVolume{})
cdiConfigInformer, _ := testutils.NewFakeInformerFor(&cdiv1.DataVolume{})
rsInformer, _ := testutils.NewFakeInformerFor(&v1.VirtualMachineInstanceReplicaSet{})
storageClassInformer, _ := testutils.NewFakeInformerFor(&storagev1.StorageClass{})
crdInformer, _ := testutils.NewFakeInformerFor(&extv1.CustomResourceDefinition{})
vmRestoreInformer, _ := testutils.NewFakeInformerFor(&snapshotv1.VirtualMachineRestore{})
dvInformer, _ := testutils.NewFakeInformerFor(&cdiv1.DataVolume{})
flavorMethods := testutils.NewMockFlavorMethods()
var qemuGid int64 = 107
app.vmiInformer = vmiInformer
app.nodeTopologyUpdater = topologyUpdater
app.informerFactory = controller.NewKubeInformerFactory(nil, nil, nil, "test")
app.evacuationController = evacuation.NewEvacuationController(vmiInformer, migrationInformer, nodeInformer, podInformer, recorder, virtClient, config)
app.disruptionBudgetController = disruptionbudget.NewDisruptionBudgetController(vmiInformer, pdbInformer, podInformer, migrationInformer, recorder, virtClient)
app.nodeController = NewNodeController(virtClient, nodeInformer, vmiInformer, recorder)
app.vmiController = NewVMIController(services.NewTemplateService("a", 240, "b", "c", "d", "e", "f", "g", pvcInformer.GetStore(), virtClient, config, qemuGid),
vmiInformer,
vmInformer,
podInformer,
pvcInformer,
recorder,
virtClient,
dataVolumeInformer,
cdiInformer,
cdiConfigInformer,
config,
topology.NewTopologyHinter(&cache.FakeCustomStore{}, &cache.FakeCustomStore{}, "amd64", nil),
nil,
false,
)
app.rsController = NewVMIReplicaSet(vmiInformer, rsInformer, recorder, virtClient, uint(10))
app.vmController = NewVMController(vmiInformer,
vmInformer,
dataVolumeInformer,
pvcInformer,
crInformer,
flavorMethods,
recorder,
virtClient)
app.migrationController = NewMigrationController(services.NewTemplateService("a", 240, "b", "c", "d", "e", "f", "g", pvcInformer.GetStore(), virtClient, config, qemuGid),
vmiInformer,
podInformer,
migrationInformer,
nodeInformer,
pvcInformer,
pdbInformer,
migrationPolicyInformer,
recorder,
virtClient,
config,
nil,
false,
)
app.snapshotController = &snapshot.VMSnapshotController{
Client: virtClient,
VMSnapshotInformer: vmSnapshotInformer,
VMSnapshotContentInformer: vmSnapshotContentInformer,
VMInformer: vmInformer,
VMIInformer: vmiInformer,
PodInformer: podInformer,
StorageClassInformer: storageClassInformer,
PVCInformer: pvcInformer,
CRDInformer: crdInformer,
DVInformer: dvInformer,
Recorder: recorder,
ResyncPeriod: 60 * time.Second,
}
app.snapshotController.Init()
app.restoreController = &snapshot.VMRestoreController{
Client: virtClient,
VMRestoreInformer: vmRestoreInformer,
VMSnapshotInformer: vmSnapshotInformer,
VMSnapshotContentInformer: vmSnapshotContentInformer,
VMInformer: vmInformer,
VMIInformer: vmiInformer,
PVCInformer: pvcInformer,
StorageClassInformer: storageClassInformer,
DataVolumeInformer: dataVolumeInformer,
Recorder: recorder,
}
app.restoreController.Init()
app.persistentVolumeClaimInformer = pvcInformer
app.nodeInformer = nodeInformer
app.readyChan = make(chan bool)
By("Invoking callback")
go app.onStartedLeading()(ctx)
By("Checking prometheus metric before sync")
dto := &io_prometheus_client.Metric{}
leaderGauge.Write(dto)
zero := 0.0
Expect(dto.GetGauge().Value).To(Equal(&zero), "Leader should be reported after virt-controller is fully operational")
// for sync
go pvcInformer.Run(ctx.Done())
go nodeInformer.Run(ctx.Done())
time.Sleep(time.Second)
By("Checking prometheus metric")
dto = &io_prometheus_client.Metric{}
leaderGauge.Write(dto)
one := 1.0
Expect(dto.GetGauge().Value).To(Equal(&one))
})
Describe("Reinitialization conditions", func() {
table.DescribeTable("Re-trigger initialization", func(hasCDIAtInit bool, addCrd bool, removeCrd bool, expectReInit bool) {
var reInitTriggered bool
app := VirtControllerApp{}
clusterConfig, crdInformer, _ := testutils.NewFakeClusterConfigUsingKVConfig(&v1.KubeVirtConfiguration{})
app.clusterConfig = clusterConfig
app.reInitChan = make(chan string, 10)
app.hasCDI = hasCDIAtInit
app.clusterConfig.SetConfigModifiedCallback(app.configModificationCallback)
if addCrd {
testutils.AddDataVolumeAPI(crdInformer)
} else if removeCrd {
testutils.RemoveDataVolumeAPI(crdInformer)
}
select {
case <-app.reInitChan:
reInitTriggered = true
case <-time.After(1 * time.Second):
reInitTriggered = false
}
Expect(reInitTriggered).To(Equal(expectReInit))
},
table.Entry("when CDI is introduced", false, true, false, true),
table.Entry("when CDI is removed", true, false, true, true),
table.Entry("not when nothing changed and cdi exists", true, true, false, false),
table.Entry("not when nothing changed and does not exist", false, false, true, false),
)
})
Describe("Readiness probe", func() {
var recorder *httptest.ResponseRecorder
var request *http.Request
var handler http.Handler
BeforeEach(func() {
app.readyChan = make(chan bool, 1)
ws := new(restful.WebService)
ws.Produces(restful.MIME_JSON)
handler = http.Handler(restful.NewContainer().Add(ws))
ws.Route(ws.GET("/leader").Produces(rest.MIME_JSON).To(app.leaderProbe))
request = newValidGetRequest()
recorder = httptest.NewRecorder()
})
Context("with closed channel", func() {
It("should return 200 and that it is the leader", func() {
close(app.readyChan)
request.URL, _ = url.Parse("/leader")
handler.ServeHTTP(recorder, request)
var x map[string]interface{}
Expect(json.Unmarshal(recorder.Body.Bytes(), &x)).To(Succeed())
Expect(recorder.Code).To(Equal(http.StatusOK))
Expect(x["apiserver"].(map[string]interface{})["leader"]).To(Equal("true"))
})
})
Context("with opened channel", func() {
It("should return 200 and that it is not the leader", func() {
request.URL, _ = url.Parse("/leader")
handler.ServeHTTP(recorder, request)
var x map[string]interface{}
Expect(json.Unmarshal(recorder.Body.Bytes(), &x)).To(Succeed())
Expect(recorder.Code).To(Equal(http.StatusOK))
Expect(x["apiserver"].(map[string]interface{})["leader"]).To(Equal("false"))
})
})
})
})