382 lines
13 KiB
Go
382 lines
13 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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"strings"
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"time"
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"github.com/go-logr/logr"
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appsv1 "k8s.io/api/apps/v1"
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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/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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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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const (
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RESTORESESSION string = "restoresession"
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UPDATESTATUS string = "updatestatus"
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)
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// RestoreSessionReconciler reconciles a RestoreSession object
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type RestoreSessionReconciler 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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}
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// +kubebuilder:rbac:groups=formol.desmojim.fr,resources=restoresessions,verbs=get;list;watch;create;update;patch;delete
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// +kubebuilder:rbac:groups=formol.desmojim.fr,resources=restoresessions/status,verbs=get;update;patch
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func (r *RestoreSessionReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
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ctx := context.Background()
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log := r.Log.WithValues("restoresession", req.NamespacedName)
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// Get the RestoreSession
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restoreSession := &formolv1alpha1.RestoreSession{}
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if err := r.Get(ctx, req.NamespacedName, restoreSession); err != nil {
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log.Error(err, "unable to get restoresession")
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return ctrl.Result{}, client.IgnoreNotFound(err)
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}
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// Get the BackupSession the RestoreSession references
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backupSession := &formolv1alpha1.BackupSession{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: restoreSession.Namespace,
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Name: restoreSession.Spec.Ref}, backupSession); err != nil {
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log.Error(err, "unable to get backupsession", "restoresession", restoreSession.Spec)
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return ctrl.Result{}, client.IgnoreNotFound(err)
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}
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// Get the BackupConfiguration linked to the BackupSession
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backupConf := &formolv1alpha1.BackupConfiguration{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: backupSession.Namespace,
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Name: backupSession.Spec.Ref}, 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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// Helper functions
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createRestoreJob := func(target formolv1alpha1.Target) error {
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restoreSessionEnv := []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: "RESTORESESSION_NAME",
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Value: restoreSession.Name,
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},
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corev1.EnvVar{
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Name: "RESTORESESSION_NAMESPACE",
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Value: restoreSession.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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for _, targetStatus := range backupSession.Status.Targets {
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if targetStatus.Name == target.Name {
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snapshotId := targetStatus.SnapshotId
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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{"volume", "restore", "--snapshot-id", snapshotId},
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VolumeMounts: []corev1.VolumeMount{output},
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Env: restoreSessionEnv,
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}
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finalizer := corev1.Container{
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Name: "finalizer",
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Image: "desmo999r/formolcli:latest",
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Args: []string{"target", "finalize"},
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VolumeMounts: []corev1.VolumeMount{output},
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Env: restoreSessionEnv,
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}
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repo := &formolv1alpha1.Repo{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: backupConf.Namespace,
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Name: backupConf.Spec.Repository,
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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(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-", restoreSession.Name, target.Name),
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Namespace: restoreSession.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{restic},
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Containers: []corev1.Container{finalizer},
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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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// get the backup function
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: restoreSession.Namespace,
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Name: step.Name,
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}, function); err != nil {
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log.Error(err, "unable to get backup function", "name", step.Name)
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return err
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}
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var restoreName string
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if function.Annotations["restoreFunction"] != "" {
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restoreName = function.Annotations["restoreFunction"]
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} else {
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restoreName = strings.Replace(step.Name, "backup", "restore", 1)
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}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: restoreSession.Namespace,
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Name: restoreName,
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}, 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.Name = function.Name
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function.Spec.Env = append(step.Env, restoreSessionEnv...)
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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(restoreSession, job, r.Scheme); err != nil {
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log.Error(err, "unable to set controller on job", "job", job, "restoresession", restoreSession)
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return err
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}
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log.V(0).Info("creating a restore job", "target", target.Name)
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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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}
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}
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return nil
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}
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deleteRestoreInitContainer := func(target formolv1alpha1.Target) error {
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deployment := &appsv1.Deployment{}
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if err := r.Get(context.Background(), client.ObjectKey{
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Namespace: backupConf.Namespace,
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Name: target.Name,
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}, deployment); err != nil {
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log.Error(err, "unable to get deployment")
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return err
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}
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log.V(1).Info("got deployment", "namespace", deployment.Namespace, "name", deployment.Name)
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newInitContainers := []corev1.Container{}
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for _, initContainer := range deployment.Spec.Template.Spec.InitContainers {
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if initContainer.Name == RESTORESESSION {
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log.V(0).Info("Found our restoresession container. Removing it from the list of init containers", "container", initContainer)
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} else {
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newInitContainers = append(newInitContainers, initContainer)
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}
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}
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deployment.Spec.Template.Spec.InitContainers = newInitContainers
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if err := r.Update(ctx, deployment); err != nil {
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log.Error(err, "unable to update deployment")
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return err
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}
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return nil
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}
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createRestoreInitContainer := func(target formolv1alpha1.Target) error {
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deployment := &appsv1.Deployment{}
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if err := r.Get(context.Background(), client.ObjectKey{
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Namespace: restoreSession.Namespace,
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Name: target.Name,
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}, deployment); err != nil {
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log.Error(err, "unable to get deployment")
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return err
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}
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log.V(1).Info("got deployment", "namespace", deployment.Namespace, "name", deployment.Name)
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for _, initContainer := range deployment.Spec.Template.Spec.InitContainers {
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if initContainer.Name == RESTORESESSION {
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log.V(0).Info("there is already a restoresession initcontainer", "deployment", deployment.Spec.Template.Spec.InitContainers)
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return nil
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}
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}
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var snapshotId string
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for _, targetStatus := range backupSession.Status.Targets {
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if targetStatus.Name == target.Name && targetStatus.Kind == target.Kind {
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snapshotId = targetStatus.SnapshotId
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}
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}
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restoreSessionEnv := []corev1.EnvVar{
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corev1.EnvVar{
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Name: formolv1alpha1.TARGET_NAME,
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Value: target.Name,
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},
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corev1.EnvVar{
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Name: formolv1alpha1.RESTORESESSION_NAME,
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Value: restoreSession.Name,
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},
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corev1.EnvVar{
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Name: formolv1alpha1.RESTORESESSION_NAMESPACE,
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Value: restoreSession.Namespace,
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},
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}
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initContainer := corev1.Container{
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Name: RESTORESESSION,
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Image: formolutils.FORMOLCLI,
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Args: []string{"volume", "restore", "--snapshot-id", snapshotId},
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VolumeMounts: target.VolumeMounts,
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Env: restoreSessionEnv,
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}
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repo := &formolv1alpha1.Repo{}
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if err := r.Get(ctx, client.ObjectKey{
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Namespace: backupConf.Namespace,
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Name: backupConf.Spec.Repository,
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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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initContainer.Env = append(initContainer.Env, formolutils.ConfigureResticEnvVar(backupConf, repo)...)
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deployment.Spec.Template.Spec.InitContainers = append([]corev1.Container{initContainer},
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deployment.Spec.Template.Spec.InitContainers...)
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if err := r.Update(ctx, deployment); err != nil {
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log.Error(err, "unable to update deployment")
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return err
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}
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return nil
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}
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startNextTask := func() (*formolv1alpha1.TargetStatus, error) {
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nextTarget := len(restoreSession.Status.Targets)
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if nextTarget < len(backupConf.Spec.Targets) {
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target := 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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SessionState: formolv1alpha1.New,
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StartTime: &metav1.Time{Time: time.Now()},
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}
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restoreSession.Status.Targets = append(restoreSession.Status.Targets, targetStatus)
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switch target.Kind {
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case formolv1alpha1.SidecarKind:
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if err := createRestoreInitContainer(target); err != nil {
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log.V(0).Info("unable to create restore init container", "task", target)
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targetStatus.SessionState = formolv1alpha1.Failure
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return nil, err
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}
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case formolv1alpha1.JobKind:
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if err := createRestoreJob(target); err != nil {
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log.V(0).Info("unable to create restore job", "task", target)
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targetStatus.SessionState = 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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endTask := func() error {
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target := backupConf.Spec.Targets[len(restoreSession.Status.Targets)-1]
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switch target.Kind {
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case formolv1alpha1.SidecarKind:
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if err := deleteRestoreInitContainer(target); err != nil {
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log.Error(err, "unable to delete restore init container")
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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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switch restoreSession.Status.SessionState {
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case formolv1alpha1.New:
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restoreSession.Status.SessionState = formolv1alpha1.Running
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if targetStatus, err := startNextTask(); err != nil {
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log.Error(err, "unable to start next restore task")
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return ctrl.Result{}, err
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} else {
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log.V(0).Info("New restore. Start the first task", "task", targetStatus.Name)
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if err := r.Status().Update(ctx, restoreSession); err != nil {
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log.Error(err, "unable to update restoresession")
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return ctrl.Result{}, err
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}
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}
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case formolv1alpha1.Running:
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currentTargetStatus := restoreSession.Status.Targets[len(restoreSession.Status.Targets)-1]
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switch currentTargetStatus.SessionState {
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case formolv1alpha1.Failure:
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log.V(0).Info("last restore task failed. Stop here", "target", currentTargetStatus.Name)
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restoreSession.Status.SessionState = formolv1alpha1.Failure
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if err := r.Status().Update(ctx, restoreSession); err != nil {
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log.Error(err, "unable to update restoresession")
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return ctrl.Result{}, err
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}
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case formolv1alpha1.Running:
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log.V(0).Info("task is still running", "target", currentTargetStatus.Name)
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return ctrl.Result{}, nil
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case formolv1alpha1.Success:
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_ = endTask()
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log.V(0).Info("last task was a success. start a new one", "target", currentTargetStatus)
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targetStatus, err := startNextTask()
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if err != nil {
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return ctrl.Result{}, err
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}
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if targetStatus == nil {
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// No more task to start. The restore is over
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restoreSession.Status.SessionState = formolv1alpha1.Success
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}
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if err := r.Status().Update(ctx, restoreSession); err != nil {
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log.Error(err, "unable to update restoresession")
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return ctrl.Result{}, err
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}
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}
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case "":
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// Restore session has just been created
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restoreSession.Status.SessionState = formolv1alpha1.New
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restoreSession.Status.StartTime = &metav1.Time{Time: time.Now()}
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if err := r.Status().Update(ctx, restoreSession); err != nil {
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log.Error(err, "unable to update restoreSession")
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return ctrl.Result{}, err
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}
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}
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return ctrl.Result{}, nil
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}
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func (r *RestoreSessionReconciler) SetupWithManager(mgr ctrl.Manager) error {
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return ctrl.NewControllerManagedBy(mgr).
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For(&formolv1alpha1.RestoreSession{}).
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Owns(&batchv1.Job{}).
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Complete(r)
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}
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