/
spanner_restore_backup.go
69 lines (60 loc) · 1.96 KB
/
spanner_restore_backup.go
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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package spanner
// [START spanner_restore_backup]
import (
"context"
"fmt"
"io"
"regexp"
database "cloud.google.com/go/spanner/admin/database/apiv1"
adminpb "google.golang.org/genproto/googleapis/spanner/admin/database/v1"
)
func restoreBackup(ctx context.Context, w io.Writer, db, backupID string) error {
adminClient, err := database.NewDatabaseAdminClient(ctx)
if err != nil {
return err
}
defer adminClient.Close()
matches := regexp.MustCompile("^(.*)/databases/(.*)$").FindStringSubmatch(db)
if matches == nil || len(matches) != 3 {
return fmt.Errorf("Invalid database id %s", db)
}
instanceName := matches[1]
databaseID := matches[2]
backupName := instanceName + "/backups/" + backupID
// Start restoring backup to a new database.
restoreOp, err := adminClient.RestoreDatabase(ctx, &adminpb.RestoreDatabaseRequest{
Parent: instanceName,
DatabaseId: databaseID,
Source: &adminpb.RestoreDatabaseRequest_Backup{
Backup: backupName,
},
})
if err != nil {
return err
}
// Wait for restore operation to complete.
dbObj, err := restoreOp.Wait(ctx)
if err != nil {
return err
}
// Newly created database has restore information.
backupInfo := dbObj.RestoreInfo.GetBackupInfo()
if backupInfo != nil {
fmt.Fprintf(w, "Source database %s restored from backup %s\n", backupInfo.SourceDatabase, backupInfo.Backup)
}
return nil
}
// [END spanner_restore_backup]