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restore.go
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restore.go
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package snapshot
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"strings"
"time"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/auth"
"github.com/replicatedhq/kots/pkg/k8sutil"
kotsadmtypes "github.com/replicatedhq/kots/pkg/kotsadm/types"
snapshottypes "github.com/replicatedhq/kots/pkg/kotsadmsnapshot/types"
"github.com/replicatedhq/kots/pkg/kurl"
"github.com/replicatedhq/kots/pkg/logger"
velerov1 "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
veleroclientv1 "github.com/vmware-tanzu/velero/pkg/generated/clientset/versioned/typed/velero/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/pointer"
)
type RestoreInstanceBackupOptions struct {
BackupName string
ExcludeAdminConsole bool
ExcludeApps bool
WaitForApps bool
VeleroNamespace string
Silent bool
}
type ListInstanceRestoresOptions struct {
Namespace string
}
func RestoreInstanceBackup(ctx context.Context, options RestoreInstanceBackupOptions) error {
clientset, err := k8sutil.GetClientset()
if err != nil {
return errors.Wrap(err, "failed to get k8s clientset")
}
veleroNamespace := options.VeleroNamespace
if veleroNamespace == "" {
var err error
veleroNamespace, err = DetectVeleroNamespace(ctx, clientset, "")
if err != nil {
return errors.Wrap(err, "failed to detect velero namespace")
}
if veleroNamespace == "" {
return errors.New("velero not found")
}
}
// get the backup
cfg, err := k8sutil.GetClusterConfig()
if err != nil {
return errors.Wrap(err, "failed to get cluster config")
}
veleroClient, err := veleroclientv1.NewForConfig(cfg)
if err != nil {
return errors.Wrap(err, "failed to create velero clientset")
}
backup, err := veleroClient.Backups(veleroNamespace).Get(ctx, options.BackupName, metav1.GetOptions{})
if err != nil {
return errors.Wrap(err, "failed to find backup")
}
// make sure this is an instance backup
if backup.Annotations["kots.io/instance"] != "true" {
return errors.Wrap(err, "backup provided is not an instance backup")
}
kotsadmImage, ok := backup.Annotations["kots.io/kotsadm-image"]
if !ok {
return errors.Wrap(err, "failed to find kotsadm image annotation")
}
kotsadmNamespace, _ := backup.Annotations["kots.io/kotsadm-deploy-namespace"]
if kotsadmNamespace == "" {
return errors.Wrap(err, "failed to find kotsadm deploy namespace annotation")
}
// make sure backup is restorable/complete
switch backup.Status.Phase {
case velerov1.BackupPhaseCompleted:
break
case velerov1.BackupPhaseFailed, velerov1.BackupPhasePartiallyFailed:
return errors.Wrap(err, "cannot restore a failed backup")
default:
return errors.Wrap(err, "backup is still in progress")
}
log := logger.NewCLILogger(os.Stdout)
if options.Silent {
log.Silence()
}
if !options.ExcludeAdminConsole {
log.ActionWithSpinner("Deleting Admin Console")
isKurl, err := kurl.IsKurl(clientset)
if err != nil {
return errors.Wrap(err, "failed to check if cluster is kurl")
}
// delete all kotsadm objects before creating the restore
err = k8sutil.DeleteKotsadm(ctx, clientset, kotsadmNamespace, isKurl)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to delete kotsadm objects")
}
log.FinishSpinner()
log.ActionWithSpinner("Restoring Admin Console")
// create a restore for kotsadm objects
restore := &velerov1.Restore{
ObjectMeta: metav1.ObjectMeta{
Namespace: veleroNamespace,
Name: fmt.Sprintf("%s.kotsadm", options.BackupName),
Annotations: map[string]string{
"kots.io/instance": "true",
"kots.io/kotsadm-image": kotsadmImage,
"kots.io/kotsadm-deploy-namespace": kotsadmNamespace,
},
},
Spec: velerov1.RestoreSpec{
BackupName: options.BackupName,
LabelSelector: &metav1.LabelSelector{
MatchLabels: map[string]string{
kotsadmtypes.KotsadmKey: kotsadmtypes.KotsadmLabelValue, // restoring applications is in a separate step after kotsadm spins up
},
},
RestorePVs: pointer.Bool(true),
IncludeClusterResources: pointer.Bool(true),
},
}
// delete existing restore object (if exists)
err = veleroClient.Restores(veleroNamespace).Delete(ctx, restore.ObjectMeta.Name, metav1.DeleteOptions{})
if err != nil && !strings.Contains(err.Error(), "not found") {
log.FinishSpinnerWithError()
return errors.Wrapf(err, "failed to delete restore %s", restore.ObjectMeta.Name)
}
// create new restore object
restore, err = veleroClient.Restores(veleroNamespace).Create(ctx, restore, metav1.CreateOptions{})
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to create restore")
}
// wait for restore to complete
restore, err = waitForVeleroRestoreCompleted(ctx, veleroNamespace, restore.ObjectMeta.Name)
if err != nil {
if restore != nil {
errMsg := fmt.Sprintf("Admin Console restore failed with %d errors and %d warnings.", restore.Status.Errors, restore.Status.Warnings)
log.FinishSpinnerWithError()
log.ActionWithoutSpinner(errMsg)
return errors.Wrap(err, errMsg)
}
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to wait for velero restore completed")
}
// wait for kotsadm to start up
timeout, err := time.ParseDuration("10m")
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to parse timeout value")
}
_, err = k8sutil.WaitForKotsadm(clientset, kotsadmNamespace, timeout)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to wait for kotsadm")
}
log.FinishSpinner()
}
if !options.ExcludeApps {
log.ActionWithSpinner("Restoring Applications")
// make sure kotsadm is up and running
timeout, err := time.ParseDuration("10m")
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to parse timeout value")
}
kotsadmPodName, err := k8sutil.WaitForKotsadm(clientset, kotsadmNamespace, timeout)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to wait for kotsadm")
}
// initiate kotsadm applications restore
err = initiateKotsadmApplicationsRestore(options.BackupName, kotsadmNamespace, kotsadmPodName, log)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to restore kotsadm applications")
}
if options.WaitForApps {
// wait for applications restore to finish
err = waitForKotsadmApplicationsRestore(options.BackupName, kotsadmNamespace, kotsadmPodName, log)
if err != nil {
if _, ok := errors.Cause(err).(*kotsadmtypes.ErrorAppsRestore); ok {
log.FinishSpinnerWithError()
return errors.Errorf("failed to restore kotsadm applications: %s", err)
}
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to wait for kotsadm applications restore")
}
}
log.FinishSpinner()
}
// both admin console and apps were restored
if !options.ExcludeAdminConsole && !options.ExcludeApps {
if options.WaitForApps {
log.ActionWithoutSpinner("Restore completed successfully.")
} else {
log.ActionWithoutSpinner("Admin Console restored successfully. Applications restore is still in progress.")
}
return nil
}
// only the admin console was restored
if !options.ExcludeAdminConsole && options.ExcludeApps {
log.ActionWithoutSpinner("Admin Console restored successfully.")
return nil
}
// only the applications were restored
if options.ExcludeAdminConsole && !options.ExcludeApps {
if options.WaitForApps {
log.ActionWithoutSpinner("Applications restored successfully.")
} else {
log.ActionWithoutSpinner("Applications restore initiated successfully but is still in progress.")
}
return nil
}
return nil
}
func ListInstanceRestores(ctx context.Context, options ListInstanceRestoresOptions) ([]velerov1.Restore, error) {
clientset, err := k8sutil.GetClientset()
if err != nil {
return nil, errors.Wrap(err, "failed to get k8s clientset")
}
veleroNamespace, err := DetectVeleroNamespace(ctx, clientset, options.Namespace)
if err != nil {
return nil, errors.Wrap(err, "failed to detect velero namespace")
}
if veleroNamespace == "" {
return nil, errors.New("velero not found")
}
cfg, err := k8sutil.GetClusterConfig()
if err != nil {
return nil, errors.Wrap(err, "failed to get cluster config")
}
veleroClient, err := veleroclientv1.NewForConfig(cfg)
if err != nil {
return nil, errors.Wrap(err, "failed to create clientset")
}
r, err := veleroClient.Restores(veleroNamespace).List(ctx, metav1.ListOptions{})
if err != nil {
return nil, errors.Wrap(err, "failed to list restores")
}
restores := []velerov1.Restore{}
for _, restore := range r.Items {
if restore.Annotations["kots.io/instance"] != "true" {
continue
}
if options.Namespace != "" && restore.Annotations["kots.io/kotsadm-deploy-namespace"] != options.Namespace {
continue
}
restores = append(restores, restore)
}
return restores, nil
}
func waitForVeleroRestoreCompleted(ctx context.Context, veleroNamespace string, restoreName string) (*velerov1.Restore, error) {
cfg, err := k8sutil.GetClusterConfig()
if err != nil {
return nil, errors.Wrap(err, "failed to get cluster config")
}
veleroClient, err := veleroclientv1.NewForConfig(cfg)
if err != nil {
return nil, errors.Wrap(err, "failed to create clientset")
}
for {
restore, err := veleroClient.Restores(veleroNamespace).Get(ctx, restoreName, metav1.GetOptions{})
if err != nil {
return nil, errors.Wrap(err, "failed to get restore")
}
switch restore.Status.Phase {
case velerov1.RestorePhaseCompleted:
return restore, nil
case velerov1.RestorePhaseFailed:
return restore, errors.New("restore failed")
case velerov1.RestorePhasePartiallyFailed:
return restore, errors.New("restore partially failed")
default:
// in progress
}
time.Sleep(time.Second)
}
}
func initiateKotsadmApplicationsRestore(backupName string, kotsadmNamespace string, kotsadmPodName string, log *logger.CLILogger) error {
getPodName := func() (string, error) {
return kotsadmPodName, nil
}
stopCh := make(chan struct{})
defer close(stopCh)
localPort, errChan, err := k8sutil.PortForward(0, 3000, kotsadmNamespace, getPodName, false, stopCh, log)
if err != nil {
return errors.Wrap(err, "failed to start port forwarding")
}
go func() {
select {
case err := <-errChan:
if err != nil {
log.Error(err)
}
case <-stopCh:
}
}()
clientset, err := k8sutil.GetClientset()
if err != nil {
return errors.Wrap(err, "failed to get k8s clientset")
}
authSlug, err := auth.GetOrCreateAuthSlug(clientset, kotsadmNamespace)
if err != nil {
return errors.Wrap(err, "failed to get kotsadm auth slug")
}
url := fmt.Sprintf("http://localhost:%d/api/v1/snapshot/%s/restore-apps", localPort, backupName)
requestPayload := map[string]interface{}{
"restoreAll": true,
}
requestBody, err := json.Marshal(requestPayload)
if err != nil {
return errors.Wrap(err, "failed to marshal request json")
}
newRequest, err := http.NewRequest("POST", url, bytes.NewBuffer(requestBody))
if err != nil {
return errors.Wrap(err, "failed to create request")
}
newRequest.Header.Add("Authorization", authSlug)
resp, err := http.DefaultClient.Do(newRequest)
if err != nil {
return errors.Wrap(err, "failed to get from kotsadm")
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return errors.Errorf("unexpected status code from %s: %s", url, resp.Status)
}
return nil
}
func waitForKotsadmApplicationsRestore(backupName string, kotsadmNamespace string, kotsadmPodName string, log *logger.CLILogger) error {
getPodName := func() (string, error) {
return kotsadmPodName, nil
}
stopCh := make(chan struct{})
defer close(stopCh)
localPort, errChan, err := k8sutil.PortForward(0, 3000, kotsadmNamespace, getPodName, false, stopCh, log)
if err != nil {
return errors.Wrap(err, "failed to start port forwarding")
}
go func() {
select {
case err := <-errChan:
if err != nil {
log.Error(err)
}
case <-stopCh:
}
}()
clientset, err := k8sutil.GetClientset()
if err != nil {
return errors.Wrap(err, "failed to get k8s clientset")
}
authSlug, err := auth.GetOrCreateAuthSlug(clientset, kotsadmNamespace)
if err != nil {
return errors.Wrap(err, "failed to get kotsadm auth slug")
}
url := fmt.Sprintf("http://localhost:%d/api/v1/snapshot/%s/apps-restore-status", localPort, backupName)
for {
requestPayload := map[string]interface{}{
"checkAll": true,
}
requestBody, err := json.Marshal(requestPayload)
if err != nil {
return errors.Wrap(err, "failed to marshal request json")
}
newRequest, err := http.NewRequest("POST", url, bytes.NewBuffer(requestBody))
if err != nil {
return errors.Wrap(err, "failed to create request")
}
newRequest.Header.Add("Authorization", authSlug)
resp, err := http.DefaultClient.Do(newRequest)
if err != nil {
return errors.Wrap(err, "failed to get from kotsadm")
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return errors.Errorf("unexpected status code from %s: %s", url, resp.Status)
}
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return errors.Wrap(err, "failed to read server response")
}
type AppRestoreStatus struct {
AppSlug string `json:"appSlug"`
RestoreDetail snapshottypes.RestoreDetail `json:"restoreDetail"`
}
type AppsRestoreStatusResponse struct {
Statuses []AppRestoreStatus `json:"statuses"`
Error string `json:"error,omitempty"`
}
var appsRestoreStatusResponse AppsRestoreStatusResponse
if err := json.Unmarshal(respBody, &appsRestoreStatusResponse); err != nil {
return errors.Wrap(err, "failed to unmarshal response")
}
if appsRestoreStatusResponse.Error != "" {
return errors.New(appsRestoreStatusResponse.Error)
}
inProgress := false
errs := []string{}
for _, s := range appsRestoreStatusResponse.Statuses {
switch s.RestoreDetail.Phase {
case velerov1.RestorePhaseCompleted:
break
case velerov1.RestorePhaseFailed, velerov1.RestorePhasePartiallyFailed:
errMsg := fmt.Sprintf("restore failed for app %s with %d errors and %d warnings", s.AppSlug, len(s.RestoreDetail.Errors), len(s.RestoreDetail.Warnings))
errs = append(errs, errMsg)
break
default:
inProgress = true
}
}
if !inProgress {
if len(errs) == 0 {
return nil
} else {
errMsg := strings.Join(errs, " AND ")
return &kotsadmtypes.ErrorAppsRestore{
Message: errMsg,
}
}
}
time.Sleep(time.Second * 2)
}
}