mirror of
https://github.com/vmware-tanzu/velero.git
synced 2026-01-07 05:46:37 +00:00
262 lines
9.5 KiB
Go
262 lines
9.5 KiB
Go
/*
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Copyright 2018, 2019 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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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/clock"
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"sigs.k8s.io/cluster-api/util/patch"
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ctrl "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
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"github.com/vmware-tanzu/velero/pkg/restic"
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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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repoSyncPeriod = 5 * time.Minute
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)
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type ResticRepoReconciler struct {
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client.Client
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namespace string
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logger logrus.FieldLogger
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clock clock.Clock
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defaultMaintenanceFrequency time.Duration
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repositoryManager restic.RepositoryManager
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}
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func NewResticRepoReconciler(namespace string, logger logrus.FieldLogger, client client.Client,
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defaultMaintenanceFrequency time.Duration, repositoryManager restic.RepositoryManager) *ResticRepoReconciler {
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c := &ResticRepoReconciler{
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client,
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namespace,
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logger,
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clock.RealClock{},
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defaultMaintenanceFrequency,
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repositoryManager,
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}
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if c.defaultMaintenanceFrequency <= 0 {
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logger.Infof("Invalid default restic maintenance frequency, setting to %v", restic.DefaultMaintenanceFrequency)
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c.defaultMaintenanceFrequency = restic.DefaultMaintenanceFrequency
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}
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return c
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}
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func (r *ResticRepoReconciler) SetupWithManager(mgr ctrl.Manager) error {
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s := kube.NewPeriodicalEnqueueSource(r.logger, mgr.GetClient(), &velerov1api.ResticRepositoryList{}, repoSyncPeriod)
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return ctrl.NewControllerManagedBy(mgr).
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For(&velerov1api.ResticRepository{}).
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Watches(s, nil).
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Complete(r)
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}
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func (r *ResticRepoReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
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log := r.logger.WithField("resticRepo", req.String())
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resticRepo := &velerov1api.ResticRepository{}
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if err := r.Get(ctx, req.NamespacedName, resticRepo); err != nil {
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if apierrors.IsNotFound(err) {
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log.Warnf("restic repository %s in namespace %s is not found", req.Name, req.Namespace)
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return ctrl.Result{}, nil
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}
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log.WithError(err).Error("error getting restic repository")
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return ctrl.Result{}, err
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}
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// Initialize the patch helper.
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patchHelper, err := patch.NewHelper(resticRepo, r.Client)
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if err != nil {
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log.WithError(err).Error("Error getting a patch helper to update restic repository resource")
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return ctrl.Result{}, errors.WithStack(err)
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}
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if resticRepo.Status.Phase == "" || resticRepo.Status.Phase == velerov1api.ResticRepositoryPhaseNew {
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if err = r.initializeRepo(ctx, resticRepo, log, patchHelper); err != nil {
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log.WithError(err).Error("error initialize repository")
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return ctrl.Result{}, errors.WithStack(err)
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}
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return ctrl.Result{}, nil
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}
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// If the repository is ready or not-ready, check it for stale locks, but if
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// this fails for any reason, it's non-critical so we still continue on to the
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// rest of the "process" logic.
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log.Debug("Checking repository for stale locks")
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if err := r.repositoryManager.UnlockRepo(resticRepo); err != nil {
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log.WithError(err).Error("Error checking repository for stale locks")
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}
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switch resticRepo.Status.Phase {
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case velerov1api.ResticRepositoryPhaseReady:
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return ctrl.Result{}, r.runMaintenanceIfDue(ctx, resticRepo, patchHelper, log)
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case velerov1api.ResticRepositoryPhaseNotReady:
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return ctrl.Result{}, r.checkNotReadyRepo(ctx, resticRepo, patchHelper, log)
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}
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return ctrl.Result{}, nil
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}
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func (r *ResticRepoReconciler) initializeRepo(ctx context.Context, req *velerov1api.ResticRepository, log logrus.FieldLogger, patchHelper *patch.Helper) error {
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log.Info("Initializing restic repository")
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// confirm the repo's BackupStorageLocation is valid
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loc := &velerov1api.BackupStorageLocation{}
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if err := r.Get(context.Background(), client.ObjectKey{
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Namespace: req.Namespace,
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Name: req.Spec.BackupStorageLocation,
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}, loc); err != nil {
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return r.patchResticRepository(ctx, req, patchHelper, log, repoNotReady(err.Error()))
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}
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repoIdentifier, err := restic.GetRepoIdentifier(loc, req.Spec.VolumeNamespace)
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if err != nil {
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return r.patchResticRepository(ctx, req, patchHelper, log, func(rr *velerov1api.ResticRepository) {
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rr.Status.Message = err.Error()
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rr.Status.Phase = velerov1api.ResticRepositoryPhaseNotReady
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if rr.Spec.MaintenanceFrequency.Duration <= 0 {
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rr.Spec.MaintenanceFrequency = metav1.Duration{Duration: r.defaultMaintenanceFrequency}
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}
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})
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}
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// defaulting - if the patch fails, return an error so the item is returned to the queue
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if err := r.patchResticRepository(ctx, req, patchHelper, log, func(rr *velerov1api.ResticRepository) {
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rr.Spec.ResticIdentifier = repoIdentifier
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if rr.Spec.MaintenanceFrequency.Duration <= 0 {
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rr.Spec.MaintenanceFrequency = metav1.Duration{Duration: r.defaultMaintenanceFrequency}
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}
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}); err != nil {
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return err
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}
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if err := ensureRepo(req, r.repositoryManager); err != nil {
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return r.patchResticRepository(ctx, req, patchHelper, log, repoNotReady(err.Error()))
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}
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return r.patchResticRepository(ctx, req, patchHelper, log, func(rr *velerov1api.ResticRepository) {
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rr.Status.Phase = velerov1api.ResticRepositoryPhaseReady
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rr.Status.LastMaintenanceTime = &metav1.Time{Time: time.Now()}
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})
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}
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// ensureRepo checks to see if a repository exists, and attempts to initialize it if
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// it does not exist. An error is returned if the repository can't be connected to
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// or initialized.
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func ensureRepo(repo *velerov1api.ResticRepository, repoManager restic.RepositoryManager) error {
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if err := repoManager.ConnectToRepo(repo); err != nil {
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// If the repository has not yet been initialized, the error message will always include
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// the following string. This is the only scenario where we should try to initialize it.
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// Other errors (e.g. "already locked") should be returned as-is since the repository
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// does already exist, but it can't be connected to.
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if strings.Contains(err.Error(), "Is there a repository at the following location?") {
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return repoManager.InitRepo(repo)
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}
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return err
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}
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return nil
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}
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func (r *ResticRepoReconciler) runMaintenanceIfDue(ctx context.Context, req *velerov1api.ResticRepository, patchHelper *patch.Helper, log logrus.FieldLogger) error {
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log.Debug("resticRepositoryController.runMaintenanceIfDue")
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now := r.clock.Now()
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if !dueForMaintenance(req, now) {
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log.Debug("not due for maintenance")
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return nil
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}
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log.Info("Running maintenance on restic repository")
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// prune failures should be displayed in the `.status.message` field but
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// should not cause the repo to move to `NotReady`.
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log.Debug("Pruning repo")
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if err := r.repositoryManager.PruneRepo(req); err != nil {
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log.WithError(err).Warn("error pruning repository")
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if patchErr := patchHelper.Patch(ctx, req); patchErr != nil {
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req.Status.Message = err.Error()
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return patchErr
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}
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}
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return r.patchResticRepository(ctx, req, patchHelper, log, func(rr *velerov1api.ResticRepository) {
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rr.Status.LastMaintenanceTime = &metav1.Time{Time: now}
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})
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}
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func dueForMaintenance(req *velerov1api.ResticRepository, now time.Time) bool {
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return req.Status.LastMaintenanceTime == nil || req.Status.LastMaintenanceTime.Add(req.Spec.MaintenanceFrequency.Duration).Before(now)
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}
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func (r *ResticRepoReconciler) checkNotReadyRepo(ctx context.Context, req *velerov1api.ResticRepository, patchHelper *patch.Helper, log logrus.FieldLogger) error {
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// no identifier: can't possibly be ready, so just return
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if req.Spec.ResticIdentifier == "" {
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return nil
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}
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log.Info("Checking restic repository for readiness")
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// we need to ensure it (first check, if check fails, attempt to init)
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// because we don't know if it's been successfully initialized yet.
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if err := ensureRepo(req, r.repositoryManager); err != nil {
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return r.patchResticRepository(ctx, req, patchHelper, log, repoNotReady(err.Error()))
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}
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return r.patchResticRepository(ctx, req, patchHelper, log, repoReady())
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}
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func repoNotReady(msg string) func(*velerov1api.ResticRepository) {
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return func(r *velerov1api.ResticRepository) {
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r.Status.Phase = velerov1api.ResticRepositoryPhaseNotReady
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r.Status.Message = msg
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}
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}
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func repoReady() func(*velerov1api.ResticRepository) {
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return func(r *velerov1api.ResticRepository) {
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r.Status.Phase = velerov1api.ResticRepositoryPhaseReady
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r.Status.Message = ""
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}
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}
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// patchResticRepository mutates req with the provided mutate function, and patches it
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// through the Kube API. After executing this function, req will be updated with both
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// the mutation and the results of the Patch() API call.
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func (r *ResticRepoReconciler) patchResticRepository(ctx context.Context, req *velerov1api.ResticRepository, patchHelper *patch.Helper, log logrus.FieldLogger, mutate func(*velerov1api.ResticRepository)) error {
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mutate(req)
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if err := patchHelper.Patch(ctx, req); err != nil {
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log.WithError(err).Errorf("error updating restic repository resource %s in namespace %s with err %s", req.Name, req.Namespace, err.Error())
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return err
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}
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return nil
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}
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