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velero.go
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velero.go
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package velero
import (
"encoding/json"
"fmt"
"github.com/jenkins-x/jx/v2/pkg/log"
"github.com/jenkins-x/jx/v2/pkg/util"
"github.com/pkg/errors"
apiextensionsclientset "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
type veleroSchedule struct {
Metadata veleroScheduleMetadata `json:"metadata"`
}
type veleroScheduleMetadata struct {
Name string `json:"name"`
}
type veleroScheduleList struct {
Items []veleroSchedule `json:"items"`
}
type veleroBackupMetadata struct {
Name string `json:"name"`
}
type veleroBackup struct {
Metadata veleroBackupMetadata `json:"metadata"`
}
type veleroBackupList struct {
Items []veleroBackup `json:"items"`
}
var (
veleroBackupsResource = "backups.velero.io"
veleroSchedulesResource = "schedules.velero.io"
)
// RestoreFromBackup restores from a named velero backup
func RestoreFromBackup(apiClient apiextensionsclientset.Interface, kubeClient kubernetes.Interface, namespace string, backupName string) error {
if backupName == "" {
return errors.Errorf("")
}
log.Logger().Infof("Using backup '%s'", backupName)
args := []string{"create", "restore", "--from-backup", backupName, "--namespace", namespace}
cmd := util.Command{
Name: "velero",
Args: args,
}
output, err := cmd.RunWithoutRetry()
if err != nil {
return errors.Wrap(err, fmt.Sprintf("executing '%s %v' command", cmd.Name, cmd.Args))
}
log.Logger().Infof(output)
return nil
}
// DoesVeleroBackupScheduleExist checks whether a velero schedule exists
func DoesVeleroBackupScheduleExist(apiClient apiextensionsclientset.Interface, namespace string) (bool, error) {
if doesVeleroSchedulesResourceExist(apiClient) {
// kubectl get schedules.velero.io -n velero -o json
args := []string{"get", veleroSchedulesResource, "-n", namespace, "-o", "json"}
cmd := util.Command{
Name: "kubectl",
Args: args,
}
output, err := cmd.RunWithoutRetry()
if err != nil {
return false, errors.Wrap(err, fmt.Sprintf("executing kubectl get %s command", veleroSchedulesResource))
}
var veleroShedules veleroScheduleList
err = json.Unmarshal([]byte(output), &veleroShedules)
if err != nil {
return false, errors.Wrap(err, "unmarshalling kubectl response")
}
if len(veleroShedules.Items) > 0 {
return true, nil
}
return false, nil
}
return false, nil
}
func doesVeleroBackupsResourceExist(apiClient apiextensionsclientset.Interface) bool {
listOptions := metav1.ListOptions{
FieldSelector: fmt.Sprintf("metadata.name=%s", veleroBackupsResource),
}
backupList, err := apiClient.ApiextensionsV1beta1().CustomResourceDefinitions().List(listOptions)
if err != nil {
return false
}
if len(backupList.Items) > 0 {
return true
}
return false
}
func doesVeleroSchedulesResourceExist(apiClient apiextensionsclientset.Interface) bool {
listOptions := metav1.ListOptions{
FieldSelector: fmt.Sprintf("metadata.name=%s", veleroSchedulesResource),
}
schedulesList, err := apiClient.ApiextensionsV1beta1().CustomResourceDefinitions().List(listOptions)
if err != nil {
return false
}
if len(schedulesList.Items) > 0 {
return true
}
return false
}
// GetBackupsFromBackupResource returns a list of all velero backups
func GetBackupsFromBackupResource(apiClient apiextensionsclientset.Interface, namespace string) ([]string, error) {
if doesVeleroBackupsResourceExist(apiClient) {
// kubectl get backups.velero.io -n velero -o json
args := []string{"get", veleroBackupsResource, "-n", namespace, "-o", "json"}
cmd := util.Command{
Name: "kubectl",
Args: args,
}
output, err := cmd.RunWithoutRetry()
if err != nil {
return []string{}, errors.Wrap(err, fmt.Sprintf("executing '%s %v' command", cmd.Name, cmd.Args))
}
var veleroBackups veleroBackupList
err = json.Unmarshal([]byte(output), &veleroBackups)
if err != nil {
return []string{}, errors.Wrap(err, "unmarshalling kubectl response for backups")
}
if len(veleroBackups.Items) > 0 {
backups := make([]string, len(veleroBackups.Items))
// there must be a nicer way to do this
for index, veleroBackup := range veleroBackups.Items {
backups[index] = veleroBackup.Metadata.Name
}
return backups, nil
}
return []string{}, nil
}
return []string{}, nil
}
// GetLatestBackupFromBackupResource returns the latest velero backup name
func GetLatestBackupFromBackupResource(apiClient apiextensionsclientset.Interface, namespace string) (string, error) {
if doesVeleroBackupsResourceExist(apiClient) {
backups, err := GetBackupsFromBackupResource(apiClient, namespace)
if err != nil {
return "", errors.Wrap(err, "when attempting to retrieve velero backup list")
}
return backups[len(backups)-1], nil
}
return "", nil
}