223 lines
8.5 KiB
Go
223 lines
8.5 KiB
Go
/*
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Copyright the Velero contributors.
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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 controller
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import (
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"context"
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"strings"
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"time"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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ctrl "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/builder"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"github.com/vmware-tanzu/velero/internal/storage"
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velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
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"github.com/vmware-tanzu/velero/pkg/persistence"
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"github.com/vmware-tanzu/velero/pkg/plugin/clientmgmt"
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"github.com/vmware-tanzu/velero/pkg/util/kube"
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)
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const (
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// keep the enqueue period a smaller value to make sure the BSL can be validated as expected.
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// The BSL validation frequency is 1 minute by default, if we set the enqueue period as 1 minute,
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// this will cause the actual validation interval for each BSL to be 2 minutes
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bslValidationEnqueuePeriod = 10 * time.Second
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)
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// BackupStorageLocationReconciler reconciles a BackupStorageLocation object
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type backupStorageLocationReconciler struct {
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ctx context.Context
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client client.Client
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scheme *runtime.Scheme
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defaultBackupLocationInfo storage.DefaultBackupLocationInfo
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// use variables to refer to these functions so they can be
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// replaced with fakes for testing.
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newPluginManager func(logrus.FieldLogger) clientmgmt.Manager
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backupStoreGetter persistence.ObjectBackupStoreGetter
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log logrus.FieldLogger
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}
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// NewBackupStorageLocationReconciler initialize and return a backupStorageLocationReconciler struct
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func NewBackupStorageLocationReconciler(
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ctx context.Context,
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client client.Client,
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scheme *runtime.Scheme,
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defaultBackupLocationInfo storage.DefaultBackupLocationInfo,
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newPluginManager func(logrus.FieldLogger) clientmgmt.Manager,
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backupStoreGetter persistence.ObjectBackupStoreGetter,
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log logrus.FieldLogger) *backupStorageLocationReconciler {
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return &backupStorageLocationReconciler{
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ctx: ctx,
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client: client,
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scheme: scheme,
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defaultBackupLocationInfo: defaultBackupLocationInfo,
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newPluginManager: newPluginManager,
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backupStoreGetter: backupStoreGetter,
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log: log,
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}
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}
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// +kubebuilder:rbac:groups=velero.io,resources=backupstoragelocations,verbs=get;list;watch;create;update;patch;delete
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// +kubebuilder:rbac:groups=velero.io,resources=backupstoragelocations/status,verbs=get;update;patch
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func (r *backupStorageLocationReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
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var unavailableErrors []string
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var location velerov1api.BackupStorageLocation
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log := r.log.WithField("controller", BackupStorageLocation).WithField(BackupStorageLocation, req.NamespacedName.String())
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log.Debug("Validating availability of BackupStorageLocation")
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locationList, err := storage.ListBackupStorageLocations(r.ctx, r.client, req.Namespace)
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if err != nil {
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log.WithError(err).Error("No BackupStorageLocations found, at least one is required")
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return ctrl.Result{}, nil
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}
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pluginManager := r.newPluginManager(log)
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defer pluginManager.CleanupClients()
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var defaultFound bool
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for _, bsl := range locationList.Items {
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if bsl.Spec.Default {
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defaultFound = true
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}
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if bsl.Name == req.Name && bsl.Namespace == req.Namespace {
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location = bsl
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}
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}
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if location.Name == "" || location.Namespace == "" {
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log.WithError(err).Error("BackupStorageLocation is not found")
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return ctrl.Result{}, nil
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}
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isDefault := location.Spec.Default
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// TODO(2.0) remove this check since the server default will be deprecated
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if !defaultFound && location.Name == r.defaultBackupLocationInfo.StorageLocation {
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// For backward-compatible, to configure the backup storage location as the default if
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// none of the BSLs be marked as the default and the BSL name matches against the
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// "velero server --default-backup-storage-location".
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isDefault = true
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defaultFound = true
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}
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func() {
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var err error
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original := location.DeepCopy()
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defer func() {
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location.Status.LastValidationTime = &metav1.Time{Time: time.Now().UTC()}
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if err != nil {
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log.Info("BackupStorageLocation is invalid, marking as unavailable")
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err = errors.Wrapf(err, "BackupStorageLocation %q is unavailable", location.Name)
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unavailableErrors = append(unavailableErrors, err.Error())
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location.Status.Phase = velerov1api.BackupStorageLocationPhaseUnavailable
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location.Status.Message = err.Error()
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} else {
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log.Info("BackupStorageLocations is valid, marking as available")
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location.Status.Phase = velerov1api.BackupStorageLocationPhaseAvailable
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location.Status.Message = ""
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}
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if err := r.client.Patch(r.ctx, &location, client.MergeFrom(original)); err != nil {
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log.WithError(err).Error("Error updating BackupStorageLocation phase")
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}
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}()
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backupStore, err := r.backupStoreGetter.Get(&location, pluginManager, log)
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if err != nil {
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log.WithError(err).Error("Error getting a backup store")
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return
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}
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log.Info("Validating BackupStorageLocation")
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err = backupStore.IsValid()
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if err != nil {
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log.WithError(err).Error("fail to validate backup store")
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return
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}
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// updates the default backup location
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location.Spec.Default = isDefault
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}()
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r.logReconciledPhase(defaultFound, locationList, unavailableErrors)
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return ctrl.Result{}, nil
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}
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func (r *backupStorageLocationReconciler) logReconciledPhase(defaultFound bool, locationList velerov1api.BackupStorageLocationList, errs []string) {
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var availableBSLs []*velerov1api.BackupStorageLocation
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var unAvailableBSLs []*velerov1api.BackupStorageLocation
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var unknownBSLs []*velerov1api.BackupStorageLocation
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log := r.log.WithField("controller", BackupStorageLocation)
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for i, location := range locationList.Items {
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phase := location.Status.Phase
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switch phase {
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case velerov1api.BackupStorageLocationPhaseAvailable:
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availableBSLs = append(availableBSLs, &locationList.Items[i])
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case velerov1api.BackupStorageLocationPhaseUnavailable:
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unAvailableBSLs = append(unAvailableBSLs, &locationList.Items[i])
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default:
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unknownBSLs = append(unknownBSLs, &locationList.Items[i])
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}
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}
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numAvailable := len(availableBSLs)
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numUnavailable := len(unAvailableBSLs)
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numUnknown := len(unknownBSLs)
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if numUnavailable+numUnknown == len(locationList.Items) { // no available BSL
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if len(errs) > 0 {
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log.Errorf("Current BackupStorageLocations available/unavailable/unknown: %v/%v/%v, %s)", numAvailable, numUnavailable, numUnknown, strings.Join(errs, "; "))
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} else {
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log.Errorf("Current BackupStorageLocations available/unavailable/unknown: %v/%v/%v)", numAvailable, numUnavailable, numUnknown)
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}
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} else if numUnavailable > 0 { // some but not all BSL unavailable
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log.Warnf("Unavailable BackupStorageLocations detected: available/unavailable/unknown: %v/%v/%v, %s)", numAvailable, numUnavailable, numUnknown, strings.Join(errs, "; "))
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}
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if !defaultFound {
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log.Warn("There is no existing BackupStorageLocation set as default. Please see `velero backup-location -h` for options.")
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}
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}
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func (r *backupStorageLocationReconciler) SetupWithManager(mgr ctrl.Manager) error {
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g := kube.NewPeriodicalEnqueueSource(
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r.log,
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mgr.GetClient(),
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&velerov1api.BackupStorageLocationList{},
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bslValidationEnqueuePeriod,
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kube.PeriodicalEnqueueSourceOption{},
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)
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gp := kube.NewGenericEventPredicate(func(object client.Object) bool {
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location := object.(*velerov1api.BackupStorageLocation)
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return storage.IsReadyToValidate(location.Spec.ValidationFrequency, location.Status.LastValidationTime, r.defaultBackupLocationInfo.ServerValidationFrequency, r.log.WithField("controller", BackupStorageLocation))
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})
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return ctrl.NewControllerManagedBy(mgr).
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// As the "status.LastValidationTime" field is always updated, this triggers new reconciling process, skip the update event that include no spec change to avoid the reconcile loop
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For(&velerov1api.BackupStorageLocation{}, builder.WithPredicates(kube.SpecChangePredicate{})).
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Watches(g, nil, builder.WithPredicates(gp)).
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Complete(r)
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}
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