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backup.go
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backup.go
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package snapshot
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"time"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/auth"
"github.com/replicatedhq/kots/pkg/k8sutil"
"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/cli-runtime/pkg/genericclioptions"
"sigs.k8s.io/controller-runtime/pkg/client/config"
)
type CreateInstanceBackupOptions struct {
Namespace string
KubernetesConfigFlags *genericclioptions.ConfigFlags
Wait bool
}
type ListInstanceBackupsOptions struct {
Namespace string
}
func CreateInstanceBackup(options CreateInstanceBackupOptions) error {
log := logger.NewLogger()
log.ActionWithSpinner("Connecting to cluster")
clientset, err := k8sutil.GetClientset(options.KubernetesConfigFlags)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to get clientset")
}
podName, err := k8sutil.FindKotsadm(clientset, options.Namespace)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to find kotsadm pod")
}
stopCh := make(chan struct{})
defer close(stopCh)
localPort, errChan, err := k8sutil.PortForward(options.KubernetesConfigFlags, 0, 3000, options.Namespace, podName, false, stopCh, log)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to start port forwarding")
}
go func() {
select {
case err := <-errChan:
if err != nil {
log.Error(err)
}
case <-stopCh:
}
}()
log.FinishSpinner()
log.ActionWithSpinner("Creating Backup")
authSlug, err := auth.GetOrCreateAuthSlug(options.KubernetesConfigFlags, options.Namespace)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to get kotsadm auth slug")
}
url := fmt.Sprintf("http://localhost:%d/api/v1/snapshot/backup", localPort)
newRequest, err := http.NewRequest("POST", url, nil)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to create instance snapshot backup request")
}
newRequest.Header.Add("Authorization", authSlug)
resp, err := http.DefaultClient.Do(newRequest)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to get from kotsadm")
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
log.FinishSpinnerWithError()
return errors.Errorf("unexpected status code from %s: %s", url, resp.Status)
}
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to read server response")
}
type BackupResponse struct {
Success bool `json:"success"`
BackupName string `json:"backupName,omitempty"`
Error string `json:"error,omitempty"`
}
var backupResponse BackupResponse
if err := json.Unmarshal(respBody, &backupResponse); err != nil {
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to unmarshal response")
}
if backupResponse.Error != "" {
log.FinishSpinnerWithError()
return errors.New(backupResponse.Error)
}
if options.Wait {
// wait for backup to complete
backup, err := waitForVeleroBackupCompleted(backupResponse.BackupName)
if err != nil {
if backup != nil {
errMsg := fmt.Sprintf("backup failed with %d errors and %d warnings.", backup.Status.Errors, backup.Status.Warnings)
log.FinishSpinnerWithError()
log.ActionWithoutSpinner(errMsg)
return errors.Wrap(err, errMsg)
}
log.FinishSpinnerWithError()
return errors.Wrap(err, "failed to wait for velero backup completed")
}
log.FinishSpinner()
log.ActionWithoutSpinner(fmt.Sprintf("Backup completed successfully. Backup name is %s", backupResponse.BackupName))
} else {
log.FinishSpinner()
log.ActionWithoutSpinner(fmt.Sprintf("Backup is in progress. Backup name is %s", backupResponse.BackupName))
}
return nil
}
func ListInstanceBackups(options ListInstanceBackupsOptions) ([]velerov1.Backup, error) {
bsl, err := findBackupStoreLocation()
if err != nil {
return nil, errors.Wrap(err, "failed to get velero namespace")
}
veleroNamespace := bsl.Namespace
cfg, err := config.GetConfig()
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")
}
b, err := veleroClient.Backups(veleroNamespace).List(context.TODO(), metav1.ListOptions{})
if err != nil {
return nil, errors.Wrap(err, "failed to list backups")
}
backups := []velerov1.Backup{}
for _, backup := range b.Items {
if backup.Annotations["kots.io/instance"] != "true" {
continue
}
if options.Namespace != "" && backup.Annotations["kots.io/kotsadm-deploy-namespace"] != options.Namespace {
continue
}
backups = append(backups, backup)
}
return backups, nil
}
func waitForVeleroBackupCompleted(backupName string) (*velerov1.Backup, error) {
bsl, err := findBackupStoreLocation()
if err != nil {
return nil, errors.Wrap(err, "failed to get velero namespace")
}
veleroNamespace := bsl.Namespace
cfg, err := config.GetConfig()
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 {
backup, err := veleroClient.Backups(veleroNamespace).Get(context.TODO(), backupName, metav1.GetOptions{})
if err != nil {
return nil, errors.Wrap(err, "failed to get backup")
}
switch backup.Status.Phase {
case velerov1.BackupPhaseCompleted:
return backup, nil
case velerov1.BackupPhaseFailed:
return backup, errors.New("backup failed")
case velerov1.BackupPhasePartiallyFailed:
return backup, errors.New("backup partially failed")
default:
// in progress
}
time.Sleep(time.Second)
}
}