467 lines
17 KiB
Go
467 lines
17 KiB
Go
/*
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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 controllers
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import (
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"context"
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"fmt"
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"sort"
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"strings"
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"time"
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"github.com/go-logr/logr"
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batchv1 "k8s.io/api/batch/v1"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/fields"
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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/client"
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"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
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formolv1alpha1 "github.com/desmo999r/formol/api/v1alpha1"
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formolutils "github.com/desmo999r/formol/pkg/utils"
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)
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var (
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sessionState = ".metadata.state"
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finalizerName = "finalizer.backupsession.formol.desmojim.fr"
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)
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// BackupSessionReconciler reconciles a BackupSession object
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type BackupSessionReconciler struct {
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client.Client
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Log logr.Logger
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Scheme *runtime.Scheme
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BackupSession *formolv1alpha1.BackupSession
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BackupConf *formolv1alpha1.BackupConfiguration
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}
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func (r *BackupSessionReconciler) StatusUpdate() error {
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log := r.Log.WithValues("backupsession-statusupdate", r.BackupSession)
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ctx := context.Background()
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// start the next task
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startNextTask := func() (*formolv1alpha1.TargetStatus, error) {
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nextTarget := len(r.BackupSession.Status.Targets)
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if nextTarget < len(r.BackupConf.Spec.Targets) {
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target := r.BackupConf.Spec.Targets[nextTarget]
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targetStatus := formolv1alpha1.TargetStatus{
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Name: target.Name,
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Kind: target.Kind,
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BackupState: formolv1alpha1.New,
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}
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r.BackupSession.Status.Targets = append(r.BackupSession.Status.Targets, targetStatus)
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switch target.Kind {
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case "Task":
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if err := r.CreateJob(target); err != nil {
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log.V(0).Info("unable to create task", "task", target)
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targetStatus.BackupState = formolv1alpha1.Failure
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return nil, err
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}
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}
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return &targetStatus, nil
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} else {
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return nil, nil
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}
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}
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// Test the backupsession backupstate to decide what to do
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switch r.BackupSession.Status.BackupState {
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case formolv1alpha1.New:
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// Brand new backupsession; start the first task
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r.BackupSession.Status.BackupState = formolv1alpha1.Running
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targetStatus, err := startNextTask()
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if err != nil {
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return err
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}
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log.V(0).Info("New backup. Start the first task", "task", targetStatus)
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if err := r.Status().Update(ctx, r.BackupSession); err != nil {
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log.Error(err, "unable to update BackupSession status")
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return err
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}
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case formolv1alpha1.Running:
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// Backup ongoing. Check the status of the last task to decide what to do
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currentTargetStatus := r.BackupSession.Status.Targets[len(r.BackupSession.Status.Targets)-1]
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switch currentTargetStatus.BackupState {
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case formolv1alpha1.Failure:
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// The last task failed. We mark the backupsession as failed and we stop here.
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log.V(0).Info("last backup task failed. Stop here", "targetStatus", currentTargetStatus)
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r.BackupSession.Status.BackupState = formolv1alpha1.Failure
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case formolv1alpha1.Running:
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// The current task is still running. Nothing to do
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log.V(0).Info("task is still running", "targetStatus", currentTargetStatus)
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case formolv1alpha1.Success:
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// The last task successed. Let's try to start the next one
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targetStatus, err := startNextTask()
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if err != nil {
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return err
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}
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log.V(0).Info("last task was a success. start a new one", "currentTargetStatus", currentTargetStatus, "targetStatus", currentTargetStatus)
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if targetStatus == nil {
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// No more task to start. The backup is a success
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r.BackupSession.Status.BackupState = formolv1alpha1.Success
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}
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}
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if err := r.Status().Update(ctx, r.BackupSession); err != nil {
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log.Error(err, "unable to update BackupSession status")
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return err
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}
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case formolv1alpha1.Deleted:
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for _, target := range r.BackupSession.Status.Targets {
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if target.BackupState != formolv1alpha1.Deleted {
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log.V(1).Info("snaphot has not been deleted. won't delete the backupsession", "target", target)
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return nil
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}
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}
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log.V(1).Info("all the snapshots have been deleted. deleting the backupsession")
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controllerutil.RemoveFinalizer(r.BackupSession, finalizerName)
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if err := r.Update(ctx, r.BackupSession); err != nil {
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log.Error(err, "unable to remove finalizer")
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return err
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}
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}
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return nil
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}
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func (r *BackupSessionReconciler) IsBackupOngoing() bool {
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log := r.Log.WithName("IsBackupOngoing")
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ctx := context.Background()
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backupSessionList := &formolv1alpha1.BackupSessionList{}
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if err := r.List(ctx, backupSessionList, client.InNamespace(r.BackupConf.Namespace), client.MatchingFieldsSelector{Selector: fields.SelectorFromSet(fields.Set{sessionState: "Running"})}); err != nil {
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log.Error(err, "unable to get backupsessionlist")
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return true
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}
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if len(backupSessionList.Items) > 0 {
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return true
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} else {
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return false
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}
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}
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// +kubebuilder:rbac:groups=formol.desmojim.fr,resources=backupsessions,verbs=get;list;watch;create;update;patch;delete
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// +kubebuilder:rbac:groups=formol.desmojim.fr,resources=backupsessions/status,verbs=get;update;patch;create;delete
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// +kubebuilder:rbac:groups=formol.desmojim.fr,resources=functions,verbs=get;list;watch
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// +kubebuilder:rbac:groups=batch,resources=jobs,verbs=get;list;create;update;patch;delete;watch
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func (r *BackupSessionReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
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time.Sleep(100 * time.Millisecond)
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log := r.Log.WithValues("backupsession", req.NamespacedName)
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ctx := context.Background()
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// your logic here
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r.BackupSession = &formolv1alpha1.BackupSession{}
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if err := r.Get(ctx, req.NamespacedName, r.BackupSession); err != nil {
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log.Error(err, "unable to get backupsession")
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return ctrl.Result{}, client.IgnoreNotFound(err)
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}
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log.V(0).Info("backupSession", "backupSession.ObjectMeta", r.BackupSession.ObjectMeta, "backupSession.Status", r.BackupSession.Status)
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if r.BackupSession.Status.ObservedGeneration == r.BackupSession.ObjectMeta.Generation {
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// status update
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log.V(0).Info("status update")
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return ctrl.Result{}, r.StatusUpdate()
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}
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r.BackupSession.Status.ObservedGeneration = r.BackupSession.ObjectMeta.Generation
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r.BackupSession.Status.BackupState = formolv1alpha1.New
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// Prepare the next schedule to start the first task
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reschedule := ctrl.Result{RequeueAfter: 5 * time.Second}
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r.BackupSession.Status.StartTime = &metav1.Time{Time: time.Now()}
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r.BackupConf = &formolv1alpha1.BackupConfiguration{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: r.BackupSession.Namespace,
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Name: r.BackupSession.Spec.Ref.Name}, r.BackupConf); err != nil {
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log.Error(err, "unable to get backupConfiguration")
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return ctrl.Result{}, client.IgnoreNotFound(err)
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}
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if r.BackupSession.ObjectMeta.DeletionTimestamp.IsZero() {
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if !controllerutil.ContainsFinalizer(r.BackupSession, finalizerName) {
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controllerutil.AddFinalizer(r.BackupSession, finalizerName)
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if err := r.Update(ctx, r.BackupSession); err != nil {
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log.Error(err, "unable to add finalizer")
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return ctrl.Result{}, err
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}
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}
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} else if r.IsBackupOngoing() {
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log.V(0).Info("there is an ongoing backup. let's reschedule the deletion of the backupsession")
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return ctrl.Result{RequeueAfter: 20 * time.Second}, nil
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} else {
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log.V(0).Info("backupsession being deleted", "backupsession", r.BackupSession.Name)
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if controllerutil.ContainsFinalizer(r.BackupSession, finalizerName) {
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if err := r.deleteExternalResources(); err != nil {
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return ctrl.Result{}, err
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}
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}
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controllerutil.RemoveFinalizer(r.BackupSession, finalizerName)
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if err := r.Update(ctx, r.BackupSession); err != nil {
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log.Error(err, "unable to remove finalizer")
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return ctrl.Result{}, err
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}
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// We have been deleted. Return here
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return ctrl.Result{}, nil
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}
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if err := r.Status().Update(ctx, r.BackupSession); err != nil {
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log.Error(err, "unable to update backupSession")
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return ctrl.Result{}, err
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}
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// cleanup old backups
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log.V(1).Info("try to cleanup old backups")
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backupSessionList := &formolv1alpha1.BackupSessionList{}
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if err := r.List(ctx, backupSessionList, client.InNamespace(r.BackupConf.Namespace), client.MatchingFieldsSelector{Selector: fields.SelectorFromSet(fields.Set{sessionState: "Success"})}); err != nil {
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log.Error(err, "unable to get backupsessionlist")
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return reschedule, nil
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}
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if len(backupSessionList.Items) < 2 {
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// Not enough backupSession to proceed
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log.V(1).Info("Not enough successful backup jobs")
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return reschedule, nil
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}
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sort.Slice(backupSessionList.Items, func(i, j int) bool {
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return backupSessionList.Items[i].Status.StartTime.Time.Unix() > backupSessionList.Items[j].Status.StartTime.Time.Unix()
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})
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type KeepBackup struct {
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Counter int32
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Last time.Time
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}
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var lastBackups, dailyBackups, weeklyBackups, monthlyBackups, yearlyBackups KeepBackup
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lastBackups.Counter = r.BackupConf.Spec.Keep.Last
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dailyBackups.Counter = r.BackupConf.Spec.Keep.Daily
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weeklyBackups.Counter = r.BackupConf.Spec.Keep.Weekly
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monthlyBackups.Counter = r.BackupConf.Spec.Keep.Monthly
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yearlyBackups.Counter = r.BackupConf.Spec.Keep.Yearly
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for _, session := range backupSessionList.Items {
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if session.Spec.Ref.Name != r.BackupConf.Name {
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continue
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}
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deleteSession := true
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keep := []string{}
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if lastBackups.Counter > 0 {
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log.V(1).Info("Keep backup", "last", session.Status.StartTime)
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lastBackups.Counter--
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keep = append(keep, "last")
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deleteSession = false
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}
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if dailyBackups.Counter > 0 {
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if session.Status.StartTime.Time.YearDay() != dailyBackups.Last.YearDay() {
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log.V(1).Info("Keep backup", "daily", session.Status.StartTime)
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dailyBackups.Counter--
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dailyBackups.Last = session.Status.StartTime.Time
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keep = append(keep, "daily")
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deleteSession = false
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}
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}
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if weeklyBackups.Counter > 0 {
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if session.Status.StartTime.Time.Weekday().String() == "Sunday" && session.Status.StartTime.Time.YearDay() != weeklyBackups.Last.YearDay() {
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log.V(1).Info("Keep backup", "weekly", session.Status.StartTime)
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weeklyBackups.Counter--
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weeklyBackups.Last = session.Status.StartTime.Time
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keep = append(keep, "weekly")
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deleteSession = false
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}
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}
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if monthlyBackups.Counter > 0 {
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if session.Status.StartTime.Time.Day() == 1 && session.Status.StartTime.Time.Month() != monthlyBackups.Last.Month() {
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log.V(1).Info("Keep backup", "monthly", session.Status.StartTime)
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monthlyBackups.Counter--
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monthlyBackups.Last = session.Status.StartTime.Time
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keep = append(keep, "monthly")
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deleteSession = false
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}
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}
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if yearlyBackups.Counter > 0 {
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if session.Status.StartTime.Time.YearDay() == 1 && session.Status.StartTime.Time.Year() != yearlyBackups.Last.Year() {
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log.V(1).Info("Keep backup", "yearly", session.Status.StartTime)
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yearlyBackups.Counter--
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yearlyBackups.Last = session.Status.StartTime.Time
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keep = append(keep, "yearly")
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deleteSession = false
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}
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}
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if deleteSession {
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log.V(1).Info("Delete session", "delete", session.Status.StartTime)
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if err := r.Delete(ctx, &session); err != nil {
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log.Error(err, "unable to delete backupsession", "session", session.Name)
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// we don't return anything, we keep going
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}
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} else {
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session.Status.Keep = strings.Join(keep, ",") + " " + time.Now().Format("2006 Jan 02 15:04:05 -0700 MST")
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if err := r.Status().Update(ctx, &session); err != nil {
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log.Error(err, "unable to update session status", "session", session)
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}
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}
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}
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return reschedule, nil
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}
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func (r *BackupSessionReconciler) CreateJob(target formolv1alpha1.Target) error {
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log := r.Log.WithValues("createjob", target.Name)
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ctx := context.Background()
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backupSessionEnv := []corev1.EnvVar{
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corev1.EnvVar{
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Name: "TARGET_NAME",
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Value: target.Name,
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},
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corev1.EnvVar{
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Name: "BACKUPSESSION_NAME",
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Value: r.BackupSession.Name,
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},
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corev1.EnvVar{
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Name: "BACKUPSESSION_NAMESPACE",
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Value: r.BackupSession.Namespace,
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},
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}
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output := corev1.VolumeMount{
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Name: "output",
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MountPath: "/output",
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}
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restic := corev1.Container{
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Name: "restic",
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Image: "desmo999r/formolcli:latest",
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Args: []string{"backup", "volume", "--tag", r.BackupSession.Name, "--path", "/output"},
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VolumeMounts: []corev1.VolumeMount{output},
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Env: backupSessionEnv,
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}
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log.V(1).Info("creating a tagget backup job", "container", restic)
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// Gather information from the repo
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repo := &formolv1alpha1.Repo{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: r.BackupConf.Namespace,
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Name: r.BackupConf.Spec.Repository.Name,
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}, repo); err != nil {
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log.Error(err, "unable to get Repo from BackupConfiguration")
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return err
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}
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// S3 backing storage
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var ttl int32 = 300
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restic.Env = append(restic.Env, formolutils.ConfigureResticEnvVar(r.BackupConf, repo)...)
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job := &batchv1.Job{
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ObjectMeta: metav1.ObjectMeta{
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GenerateName: fmt.Sprintf("%s-%s-", r.BackupSession.Name, target.Name),
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Namespace: r.BackupConf.Namespace,
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},
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Spec: batchv1.JobSpec{
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TTLSecondsAfterFinished: &ttl,
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Template: corev1.PodTemplateSpec{
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Spec: corev1.PodSpec{
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InitContainers: []corev1.Container{},
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Containers: []corev1.Container{restic},
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Volumes: []corev1.Volume{
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corev1.Volume{Name: "output"},
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},
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RestartPolicy: corev1.RestartPolicyOnFailure,
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},
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},
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},
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}
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for _, step := range target.Steps {
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function := &formolv1alpha1.Function{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: step.Namespace,
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Name: step.Name}, function); err != nil {
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log.Error(err, "unable to get function", "Function", step)
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return err
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}
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function.Spec.Env = append(step.Env, backupSessionEnv...)
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function.Spec.VolumeMounts = append(function.Spec.VolumeMounts, output)
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job.Spec.Template.Spec.InitContainers = append(job.Spec.Template.Spec.InitContainers, function.Spec)
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}
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if err := ctrl.SetControllerReference(r.BackupConf, job, r.Scheme); err != nil {
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log.Error(err, "unable to set controller on job", "job", job, "backupconf", r.BackupConf)
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return err
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}
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log.V(0).Info("creating a backup job", "target", target)
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if err := r.Create(ctx, job); err != nil {
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log.Error(err, "unable to create job", "job", job)
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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 *BackupSessionReconciler) deleteExternalResources() error {
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ctx := context.Background()
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log := r.Log.WithValues("deleteExternalResources", r.BackupSession.Name)
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// Gather information from the repo
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repo := &formolv1alpha1.Repo{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: r.BackupConf.Namespace,
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Name: r.BackupConf.Spec.Repository.Name,
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}, repo); err != nil {
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log.Error(err, "unable to get Repo from BackupConfiguration")
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return err
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}
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env := formolutils.ConfigureResticEnvVar(r.BackupConf, repo)
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// container that will delete the restic snapshot(s) matching the backupsession
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deleteSnapshots := []corev1.Container{}
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for _, target := range r.BackupSession.Status.Targets {
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if target.BackupState == formolv1alpha1.Success {
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deleteSnapshots = append(deleteSnapshots, corev1.Container{
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Name: target.Name,
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Image: "desmo999r/formolcli:latest",
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Args: []string{"delete", "snapshot", "--snapshot", target.SnapshotId},
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Env: env,
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})
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}
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}
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// create a job to delete the restic snapshot(s) with the backupsession name tag
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if len(deleteSnapshots) > 0 {
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var ttl int32 = 300
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job := &batchv1.Job{
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ObjectMeta: metav1.ObjectMeta{
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GenerateName: fmt.Sprintf("delete-%s-", r.BackupSession.Name),
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Namespace: r.BackupSession.Namespace,
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},
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Spec: batchv1.JobSpec{
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TTLSecondsAfterFinished: &ttl,
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Template: corev1.PodTemplateSpec{
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Spec: corev1.PodSpec{
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InitContainers: []corev1.Container{},
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Containers: deleteSnapshots,
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RestartPolicy: corev1.RestartPolicyOnFailure,
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},
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},
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},
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}
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log.V(0).Info("creating a job to delete restic snapshots")
|
|
if err := r.Create(ctx, job); err != nil {
|
|
log.Error(err, "unable to delete job", "job", job)
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (r *BackupSessionReconciler) SetupWithManager(mgr ctrl.Manager) error {
|
|
if err := mgr.GetFieldIndexer().IndexField(context.TODO(), &formolv1alpha1.BackupSession{}, sessionState, func(rawObj runtime.Object) []string {
|
|
session := rawObj.(*formolv1alpha1.BackupSession)
|
|
return []string{string(session.Status.BackupState)}
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
|
|
return ctrl.NewControllerManagedBy(mgr).
|
|
For(&formolv1alpha1.BackupSession{}).
|
|
//WithEventFilter(predicate.GenerationChangedPredicate{}). // Don't reconcile when status gets updated
|
|
Owns(&batchv1.Job{}).
|
|
Complete(r)
|
|
}
|