Add DataSource controller to update the Ready condition (#2085)

even when there is no DataImportCron associated

Signed-off-by: Arnon Gilboa <agilboa@redhat.com>

cmd/cdi-controller/controller.go

@@ -209,6 +209,10 @@ func start(ctx context.Context, cfg *rest.Config) {
 		klog.Errorf("Unable to setup dataimportcron controller: %v", err)
 		os.Exit(1)
 	}
+	if _, err := controller.NewDataSourceController(mgr, log, installerLabels); err != nil {
+		klog.Errorf("Unable to setup datasource controller: %v", err)
+		os.Exit(1)
+	}
 
 	klog.V(1).Infoln("created cdi controllers")
 

pkg/controller/BUILD.bazel

@@ -7,6 +7,7 @@ go_library(
         "config-controller.go",
         "dataimportcron-conditions.go",
         "dataimportcron-controller.go",
+        "datasource-controller.go",
         "datavolume-conditions.go",
         "datavolume-controller.go",
         "import-controller.go",

pkg/controller/dataimportcron-conditions.go

@@ -29,9 +29,7 @@ const (
 	outdated   = "Outdated"
 	scheduled  = "ImportScheduled"
 	inProgress = "ImportProgressing"
-	failed     = "ImportFailed"
 	upToDate   = "UpToDate"
-	ready      = "Ready"
 )
 
 func updateDataImportCronCondition(cron *cdiv1.DataImportCron, conditionType cdiv1.DataImportCronConditionType, status corev1.ConditionStatus, message, reason string) {
@@ -61,26 +59,6 @@ func FindDataImportCronConditionByType(cron *cdiv1.DataImportCron, conditionType
 	return nil
 }
 
-func updateDataSourceCondition(ds *cdiv1.DataSource, conditionType cdiv1.DataSourceConditionType, status corev1.ConditionStatus, message, reason string) {
-	if condition := FindDataSourceConditionByType(ds, conditionType); condition != nil {
-		updateConditionState(&condition.ConditionState, status, message, reason)
-	} else {
-		condition = &cdiv1.DataSourceCondition{Type: conditionType}
-		updateConditionState(&condition.ConditionState, status, message, reason)
-		ds.Status.Conditions = append(ds.Status.Conditions, *condition)
-	}
-}
-
-// FindDataSourceConditionByType finds DataSourceCondition by condition type
-func FindDataSourceConditionByType(ds *cdiv1.DataSource, conditionType cdiv1.DataSourceConditionType) *cdiv1.DataSourceCondition {
-	for i, condition := range ds.Status.Conditions {
-		if condition.Type == conditionType {
-			return &ds.Status.Conditions[i]
-		}
-	}
-	return nil
-}
-
 func updateConditionState(condition *cdiv1.ConditionState, status corev1.ConditionStatus, message, reason string) {
 	conditionStatusUpdated := condition.Status != status
 	conditionUpdated := conditionStatusUpdated || condition.Message != message || condition.Reason != reason

pkg/controller/dataimportcron-controller.go

@@ -338,22 +338,7 @@ func (r *DataImportCronReconciler) updateDataSource(ctx context.Context, dataImp
 
 	sourcePVC := dataImportCron.Status.LastImportedPVC
 	if sourcePVC != nil {
-		dv := &cdiv1.DataVolume{}
-		if err := r.client.Get(ctx, types.NamespacedName{Namespace: sourcePVC.Namespace, Name: sourcePVC.Name}, dv); err != nil {
-			if k8serrors.IsNotFound(err) {
-				log.Info("DataVolume not found", "name", sourcePVC.Name)
-				updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionFalse, "DataVolume not found", notFound)
-			} else {
-				return err
-			}
-		} else if dv.Status.Phase == cdiv1.Succeeded {
-			updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionTrue, "DataSource is ready to be consumed", ready)
-		} else {
-			updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionFalse, fmt.Sprintf("Import DataVolume phase %s", dv.Status.Phase), string(dv.Status.Phase))
-		}
 		dataSource.Spec.Source.PVC = sourcePVC
-	} else {
-		updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionFalse, "No imports yet", noImport)
 	}
 	if !reflect.DeepEqual(dataSource, dataSourceCopy) {
 		if err := r.client.Update(ctx, dataSource); err != nil {

pkg/controller/dataimportcron-controller_test.go

@@ -58,6 +58,7 @@ var _ = Describe("All DataImportCron Tests", func() {
 	var _ = Describe("DataImportCron controller reconcile loop", func() {
 		var (
 			reconciler   *DataImportCronReconciler
+			dsReconciler *DataSourceReconciler
 			cron         *cdiv1.DataImportCron
 			dataSource   *cdiv1.DataSource
 			cronKey      = types.NamespacedName{Name: cronName, Namespace: metav1.NamespaceDefault}
@@ -87,8 +88,24 @@ var _ = Describe("All DataImportCron Tests", func() {
 			Expect(cronCond).ToNot(BeNil())
 			verifyConditionState(string(cdiv1.DataImportCronUpToDate), cronCond.ConditionState, isUpToDate, reasonUpToDate)
 			if dataSource != nil {
+				imports := cron.Status.CurrentImports
+				Expect(imports).ToNot(BeNil())
+				Expect(len(imports)).ToNot(BeZero())
+				dvName := imports[0].DataVolumeName
+				Expect(dvName).ToNot(BeEmpty())
+
+				dv := &cdiv1.DataVolume{}
+				err = reconciler.client.Get(context.TODO(), dvKey(dvName), dv)
+				Expect(err).ToNot(HaveOccurred())
 				err = reconciler.client.Get(context.TODO(), dataSourceKey(cron), dataSource)
 				Expect(err).ToNot(HaveOccurred())
+				dsReconciler = createDataSourceReconciler(dataSource, dv)
+				dsReq := reconcile.Request{NamespacedName: dataSourceKey(cron)}
+				_, err = dsReconciler.Reconcile(context.TODO(), dsReq)
+				Expect(err).ToNot(HaveOccurred())
+
+				err = dsReconciler.client.Get(context.TODO(), dataSourceKey(cron), dataSource)
+				Expect(err).ToNot(HaveOccurred())
 				dsCond := FindDataSourceConditionByType(dataSource, cdiv1.DataSourceReady)
 				Expect(dsCond).ToNot(BeNil())
 				verifyConditionState(string(cdiv1.DataSourceReady), dsCond.ConditionState, isReady, reasonReady)
@@ -147,7 +164,7 @@ var _ = Describe("All DataImportCron Tests", func() {
 			err := reconciler.client.Update(context.TODO(), cron)
 			Expect(err).ToNot(HaveOccurred())
 			dataSource = &cdiv1.DataSource{}
-			verifyConditions("After DesiredDigest is set", false, false, false, noImport, outdated, noImport)
+			verifyConditions("After DesiredDigest is set", false, false, false, noImport, outdated, noPvc)
 
 			imports := cron.Status.CurrentImports
 			Expect(imports).ToNot(BeNil())
@@ -165,12 +182,12 @@ var _ = Describe("All DataImportCron Tests", func() {
 			dv.Status.Phase = cdiv1.ImportScheduled
 			err = reconciler.client.Update(context.TODO(), dv)
 			Expect(err).ToNot(HaveOccurred())
-			verifyConditions("Import scheduled", false, false, false, scheduled, inProgress, noImport)
+			verifyConditions("Import scheduled", false, false, false, scheduled, inProgress, noPvc)
 
 			dv.Status.Phase = cdiv1.ImportInProgress
 			err = reconciler.client.Update(context.TODO(), dv)
 			Expect(err).ToNot(HaveOccurred())
-			verifyConditions("Import in progress", true, false, false, inProgress, inProgress, noImport)
+			verifyConditions("Import in progress", true, false, false, inProgress, inProgress, noPvc)
 			Expect(cron.Status.LastExecutionTimestamp).ToNot(BeNil())
 
 			dv.Status.Phase = cdiv1.Succeeded

pkg/controller/datasource-controller.go

@@ -0,0 +1,144 @@
+/*
+Copyright 2022 The CDI 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.
+limitations under the License.
+See the License for the specific language governing permissions and
+*/
+
+package controller
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+
+	"github.com/go-logr/logr"
+	corev1 "k8s.io/api/core/v1"
+	k8serrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/tools/record"
+	cdiv1 "kubevirt.io/containerized-data-importer-api/pkg/apis/core/v1beta1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/controller"
+	"sigs.k8s.io/controller-runtime/pkg/handler"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+	"sigs.k8s.io/controller-runtime/pkg/source"
+)
+
+// DataSourceReconciler members
+type DataSourceReconciler struct {
+	client          client.Client
+	recorder        record.EventRecorder
+	scheme          *runtime.Scheme
+	log             logr.Logger
+	installerLabels map[string]string
+}
+
+const (
+	ready = "Ready"
+	noPvc = "NoPvc"
+)
+
+// Reconcile loop for DataSourceReconciler
+func (r *DataSourceReconciler) Reconcile(ctx context.Context, req reconcile.Request) (reconcile.Result, error) {
+	dataSource := &cdiv1.DataSource{}
+	if err := r.client.Get(ctx, req.NamespacedName, dataSource); err != nil {
+		if k8serrors.IsNotFound(err) {
+			return reconcile.Result{}, nil
+		}
+		return reconcile.Result{}, err
+	}
+	if err := r.update(ctx, dataSource); err != nil {
+		return reconcile.Result{}, err
+	}
+	return reconcile.Result{}, nil
+}
+
+func (r *DataSourceReconciler) update(ctx context.Context, dataSource *cdiv1.DataSource) error {
+	dataSourceCopy := dataSource.DeepCopy()
+	sourcePVC := dataSource.Spec.Source.PVC
+	if sourcePVC != nil {
+		dv := &cdiv1.DataVolume{}
+		if err := r.client.Get(ctx, types.NamespacedName{Namespace: sourcePVC.Namespace, Name: sourcePVC.Name}, dv); err != nil {
+			if k8serrors.IsNotFound(err) {
+				r.log.Info("DataVolume not found", "name", sourcePVC.Name)
+				updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionFalse, "DataVolume not found", notFound)
+			} else {
+				return err
+			}
+		} else if dv.Status.Phase == cdiv1.Succeeded {
+			updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionTrue, "DataSource is ready to be consumed", ready)
+		} else {
+			updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionFalse, fmt.Sprintf("Import DataVolume phase %s", dv.Status.Phase), string(dv.Status.Phase))
+		}
+	} else {
+		updateDataSourceCondition(dataSource, cdiv1.DataSourceReady, corev1.ConditionFalse, "No source PVC set", noPvc)
+	}
+	if !reflect.DeepEqual(dataSource, dataSourceCopy) {
+		if err := r.client.Update(ctx, dataSource); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func updateDataSourceCondition(ds *cdiv1.DataSource, conditionType cdiv1.DataSourceConditionType, status corev1.ConditionStatus, message, reason string) {
+	if condition := FindDataSourceConditionByType(ds, conditionType); condition != nil {
+		updateConditionState(&condition.ConditionState, status, message, reason)
+	} else {
+		condition = &cdiv1.DataSourceCondition{Type: conditionType}
+		updateConditionState(&condition.ConditionState, status, message, reason)
+		ds.Status.Conditions = append(ds.Status.Conditions, *condition)
+	}
+}
+
+// FindDataSourceConditionByType finds DataSourceCondition by condition type
+func FindDataSourceConditionByType(ds *cdiv1.DataSource, conditionType cdiv1.DataSourceConditionType) *cdiv1.DataSourceCondition {
+	for i, condition := range ds.Status.Conditions {
+		if condition.Type == conditionType {
+			return &ds.Status.Conditions[i]
+		}
+	}
+	return nil
+}
+
+// NewDataSourceController creates a new instance of the DataSource controller
+func NewDataSourceController(mgr manager.Manager, log logr.Logger, installerLabels map[string]string) (controller.Controller, error) {
+	reconciler := &DataSourceReconciler{
+		client:          mgr.GetClient(),
+		recorder:        mgr.GetEventRecorderFor(dataImportControllerName),
+		scheme:          mgr.GetScheme(),
+		log:             log.WithName(dataImportControllerName),
+		installerLabels: installerLabels,
+	}
+	DataSourceController, err := controller.New(dataImportControllerName, mgr, controller.Options{Reconciler: reconciler})
+	if err != nil {
+		return nil, err
+	}
+	if err := addDataSourceControllerWatches(mgr, DataSourceController, log); err != nil {
+		return nil, err
+	}
+	log.Info("Initialized DataSource controller")
+	return DataSourceController, nil
+}
+
+func addDataSourceControllerWatches(mgr manager.Manager, c controller.Controller, log logr.Logger) error {
+	if err := cdiv1.AddToScheme(mgr.GetScheme()); err != nil {
+		return err
+	}
+	if err := c.Watch(&source.Kind{Type: &cdiv1.DataSource{}}, &handler.EnqueueRequestForObject{}); err != nil {
+		return err
+	}
+	return nil
+}

pkg/controller/datasource-controller_test.go

@@ -0,0 +1,119 @@
+/*
+Copyright 2022 The CDI 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 controller
+
+import (
+	"context"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/kubernetes/scheme"
+	cdiv1 "kubevirt.io/containerized-data-importer-api/pkg/apis/core/v1beta1"
+	"sigs.k8s.io/controller-runtime/pkg/client/fake"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+)
+
+const (
+	dsName  = "test-datasource"
+	pvcName = "test-pvc"
+)
+
+var _ = Describe("All DataSource Tests", func() {
+	var _ = Describe("DataSource controller reconcile loop", func() {
+		var (
+			reconciler *DataSourceReconciler
+			ds         *cdiv1.DataSource
+			dsKey      = types.NamespacedName{Name: dsName, Namespace: metav1.NamespaceDefault}
+			dsReq      = reconcile.Request{NamespacedName: dsKey}
+		)
+
+		// verifyConditions reconciles, gets DataSource, and verifies its status conditions
+		var verifyConditions = func(step string, isReady bool, reasonReady string) {
+			By(step)
+			_, err := reconciler.Reconcile(context.TODO(), dsReq)
+			Expect(err).ToNot(HaveOccurred())
+			err = reconciler.client.Get(context.TODO(), dsKey, ds)
+			Expect(err).ToNot(HaveOccurred())
+			dsCond := FindDataSourceConditionByType(ds, cdiv1.DataSourceReady)
+			Expect(dsCond).ToNot(BeNil())
+			verifyConditionState(string(cdiv1.DataSourceReady), dsCond.ConditionState, isReady, reasonReady)
+		}
+
+		It("Should do nothing and return nil when no DataSource exists", func() {
+			reconciler = createDataSourceReconciler()
+			_, err := reconciler.Reconcile(context.TODO(), dsReq)
+			Expect(err).ToNot(HaveOccurred())
+		})
+
+		It("Should update Ready condition when DataSource has no source pvc", func() {
+			ds = createDataSource()
+			reconciler = createDataSourceReconciler(ds)
+			verifyConditions("No source pvc", false, noPvc)
+		})
+
+		It("Should update Ready condition when DataSource has source pvc", func() {
+			ds = createDataSource()
+			ds.Spec.Source.PVC = &cdiv1.DataVolumeSourcePVC{Namespace: metav1.NamespaceDefault, Name: pvcName}
+			reconciler = createDataSourceReconciler(ds)
+			verifyConditions("Source DV does not exist", false, notFound)
+
+			dv := newImportDataVolume(pvcName)
+			err := reconciler.client.Create(context.TODO(), dv)
+			Expect(err).ToNot(HaveOccurred())
+
+			dv.Status.Phase = cdiv1.ImportInProgress
+			err = reconciler.client.Update(context.TODO(), dv)
+			Expect(err).ToNot(HaveOccurred())
+			verifyConditions("Source DV ImportInProgress", false, string(dv.Status.Phase))
+
+			dv.Status.Phase = cdiv1.Succeeded
+			err = reconciler.client.Update(context.TODO(), dv)
+			Expect(err).ToNot(HaveOccurred())
+			verifyConditions("Source DV Succeeded", true, ready)
+
+			err = reconciler.client.Delete(context.TODO(), dv)
+			Expect(err).ToNot(HaveOccurred())
+			verifyConditions("Source DV Deleted", false, notFound)
+		})
+	})
+})
+
+func createDataSourceReconciler(objects ...runtime.Object) *DataSourceReconciler {
+	s := scheme.Scheme
+	cdiv1.AddToScheme(s)
+	cl := fake.NewFakeClientWithScheme(s, objects...)
+	r := &DataSourceReconciler{
+		client: cl,
+		scheme: s,
+		log:    cronLog,
+	}
+	return r
+}
+
+func createDataSource() *cdiv1.DataSource {
+	return &cdiv1.DataSource{
+		TypeMeta: metav1.TypeMeta{APIVersion: cdiv1.SchemeGroupVersion.String()},
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      dsName,
+			Namespace: metav1.NamespaceDefault,
+		},
+	}
+}