Restablece la base de datos desde una copia de seguridad

Restablece una base de datos a partir de una copia de seguridad.

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Para obtener documentación en la que se incluye esta muestra de código, consulta lo siguiente:

Muestra de código

C++

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 

void RestoreDatabase(google::cloud::spanner_admin::DatabaseAdminClient client,
                     std::string const& project_id,
                     std::string const& instance_id,
                     std::string const& database_id,
                     std::string const& backup_id) {
  google::cloud::spanner::Database database(project_id, instance_id,
                                            database_id);
  google::cloud::spanner::Backup backup(database.instance(), backup_id);
  auto restored_db =
      client
          .RestoreDatabase(database.instance().FullName(),
                           database.database_id(), backup.FullName())
          .get();
  if (!restored_db) throw std::move(restored_db).status();
  std::cout << "Database";
  if (restored_db->restore_info().source_type() ==
      google::spanner::admin::database::v1::BACKUP) {
    auto const& backup_info = restored_db->restore_info().backup_info();
    std::cout << " " << backup_info.source_database() << " as of "
              << google::cloud::spanner::MakeTimestamp(
                     backup_info.version_time())
                     .value();
  }
  std::cout << " restored to " << restored_db->name();
  std::cout << " from backup " << backup.FullName();
  std::cout << ".\n";
}

C#

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 


using Google.Cloud.Spanner.Admin.Database.V1;
using Google.Cloud.Spanner.Common.V1;
using Google.LongRunning;
using System;

public class RestoreDatabaseSample
{
    public RestoreInfo RestoreDatabase(string projectId, string instanceId, string databaseId, string backupId)
    {
        // Create the DatabaseAdminClient instance.
        DatabaseAdminClient databaseAdminClient = DatabaseAdminClient.Create();

        InstanceName parentAsInstanceName = InstanceName.FromProjectInstance(projectId, instanceId);
        BackupName backupAsBackupName = BackupName.FromProjectInstanceBackup(projectId, instanceId, backupId);

        // Make the RestoreDatabase request.
        Operation<Database, RestoreDatabaseMetadata> response = databaseAdminClient.RestoreDatabase(parentAsInstanceName, databaseId, backupAsBackupName);

        Console.WriteLine("Waiting for the operation to finish");

        // Poll until the returned long-running operation is complete.
        var completedResponse = response.PollUntilCompleted();

        if (completedResponse.IsFaulted)
        {
            Console.WriteLine($"Database Restore Failed: {completedResponse.Exception}");
            throw completedResponse.Exception;
        }

        RestoreInfo restoreInfo = completedResponse.Result.RestoreInfo;
        Console.WriteLine(
            $"Database {restoreInfo.BackupInfo.SourceDatabase} was restored " +
            $"to {databaseId} from backup {restoreInfo.BackupInfo.Backup} " +
            $"with version time {restoreInfo.BackupInfo.VersionTime.ToDateTime()}");

        return restoreInfo;
    }
}

Go

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 


import (
	"context"
	"fmt"
	"io"
	"regexp"

	database "cloud.google.com/go/spanner/admin/database/apiv1"
	adminpb "cloud.google.com/go/spanner/admin/database/apiv1/databasepb"
)

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
}

Java

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 

static void restoreBackup(
    DatabaseAdminClient dbAdminClient,
    String projectId,
    String instanceId,
    String backupId,
    String restoreToDatabaseId) {
  BackupName backupName = BackupName.of(projectId, instanceId, backupId);
  Backup backup = dbAdminClient.getBackup(backupName);
  // Initiate the request which returns an OperationFuture.
  System.out.println(String.format(
      "Restoring backup [%s] to database [%s]...", backup.getName(), restoreToDatabaseId));
  try {
    RestoreDatabaseRequest request =
        RestoreDatabaseRequest.newBuilder()
            .setParent(InstanceName.of(projectId, instanceId).toString())
            .setDatabaseId(restoreToDatabaseId)
            .setBackup(backupName.toString()).build();
    OperationFuture<com.google.spanner.admin.database.v1.Database, RestoreDatabaseMetadata> op =
        dbAdminClient.restoreDatabaseAsync(request);
    // Wait until the database has been restored.
    com.google.spanner.admin.database.v1.Database db = op.get();
    // Get the restore info.
    RestoreInfo restoreInfo = db.getRestoreInfo();
    BackupInfo backupInfo = restoreInfo.getBackupInfo();

    System.out.println(
        "Restored database ["
            + db.getName()
            + "] from ["
            + restoreInfo.getBackupInfo().getBackup()
            + "] with version time [" + backupInfo.getVersionTime() + "]");
  } catch (ExecutionException e) {
    throw SpannerExceptionFactory.newSpannerException(e.getCause());
  } catch (InterruptedException e) {
    throw SpannerExceptionFactory.propagateInterrupt(e);
  }
}

Node.js

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 

// Imports the Google Cloud client library and precise date library
const {Spanner} = require('@google-cloud/spanner');
const {PreciseDate} = require('@google-cloud/precise-date');

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'my-project-id';
// const instanceId = 'my-instance';
// const databaseId = 'my-database';
// const backupId = 'my-backup';

// Creates a client
const spanner = new Spanner({
  projectId: projectId,
});

// Gets a reference to a Cloud Spanner Database Admin Client object
const databaseAdminClient = spanner.getDatabaseAdminClient();

// Restore the database
console.log(
  `Restoring database ${databaseAdminClient.databasePath(
    projectId,
    instanceId,
    databaseId
  )} from backup ${backupId}.`
);
const [restoreOperation] = await databaseAdminClient.restoreDatabase({
  parent: databaseAdminClient.instancePath(projectId, instanceId),
  databaseId: databaseId,
  backup: databaseAdminClient.backupPath(projectId, instanceId, backupId),
});

// Wait for restore to complete
console.log('Waiting for database restore to complete...');
await restoreOperation.promise();

console.log('Database restored from backup.');
const [metadata] = await databaseAdminClient.getDatabase({
  name: databaseAdminClient.databasePath(projectId, instanceId, databaseId),
});
console.log(
  `Database ${metadata.restoreInfo.backupInfo.sourceDatabase} was restored ` +
    `to ${databaseId} from backup ${metadata.restoreInfo.backupInfo.backup} ` +
    'with version time ' +
    `${new PreciseDate(
      metadata.restoreInfo.backupInfo.versionTime
    ).toISOString()}.`
);

PHP

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 

use Google\Cloud\Spanner\Admin\Database\V1\Client\DatabaseAdminClient;
use Google\Cloud\Spanner\Admin\Database\V1\RestoreDatabaseRequest;

/**
 * Restore a database from a backup.
 * Example:
 * ```
 * restore_backup($projectId, $instanceId, $databaseId, $backupId);
 * ```
 * @param string $projectId The Google Cloud project ID.
 * @param string $instanceId The Spanner instance ID.
 * @param string $databaseId The Spanner database ID.
 * @param string $backupId The Spanner backup ID.
 */
function restore_backup(
    string $projectId,
    string $instanceId,
    string $databaseId,
    string $backupId
): void {
    $databaseAdminClient = new DatabaseAdminClient();

    $backupName = DatabaseAdminClient::backupName($projectId, $instanceId, $backupId);
    $instanceName = DatabaseAdminClient::instanceName($projectId, $instanceId);

    $request = new RestoreDatabaseRequest([
        'parent' => $instanceName,
        'database_id' => $databaseId,
        'backup' => $backupName
    ]);

    $operationResponse = $databaseAdminClient->restoreDatabase($request);
    $operationResponse->pollUntilComplete();

    $database = $operationResponse->operationSucceeded() ? $operationResponse->getResult() : null;
    $restoreInfo = $database->getRestoreInfo();
    $backupInfo = $restoreInfo->getBackupInfo();
    $sourceDatabase = $backupInfo->getSourceDatabase();
    $sourceBackup = $backupInfo->getBackup();
    $versionTime = $backupInfo->getVersionTime()->getSeconds();
    printf(
        'Database %s restored from backup %s with version time %s' . PHP_EOL,
        $sourceDatabase, $sourceBackup, $versionTime
    );
}

Python

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 

def restore_database(instance_id, new_database_id, backup_id):
    """Restores a database from a backup."""
    from google.cloud.spanner_admin_database_v1 import RestoreDatabaseRequest

    spanner_client = spanner.Client()
    database_admin_api = spanner_client.database_admin_api

    # Start restoring an existing backup to a new database.
    request = RestoreDatabaseRequest(
        parent=database_admin_api.instance_path(spanner_client.project, instance_id),
        database_id=new_database_id,
        backup=database_admin_api.backup_path(
            spanner_client.project, instance_id, backup_id
        ),
    )
    operation = database_admin_api.restore_database(request)

    # Wait for restore operation to complete.
    db = operation.result(1600)

    # Newly created database has restore information.
    restore_info = db.restore_info
    print(
        "Database {} restored to {} from backup {} with version time {}.".format(
            restore_info.backup_info.source_database,
            new_database_id,
            restore_info.backup_info.backup,
            restore_info.backup_info.version_time,
        )
    )

Ruby

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Spanner, consulta Bibliotecas cliente de Spanner.

Para autenticarte en Spanner, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local. 

# project_id  = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID of where to restore"
# backup_id = "Your Spanner backup ID"

require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"

database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin

instance_path = database_admin_client.instance_path project: project_id, instance: instance_id

db_path = database_admin_client.database_path project: project_id,
                                              instance: instance_id,
                                              database: database_id

backup_path = database_admin_client.backup_path project: project_id,
                                                instance: instance_id,
                                                backup: backup_id

job = database_admin_client.restore_database parent: instance_path,
                                             database_id: database_id,
                                             backup: backup_path

puts "Waiting for restore backup operation to complete"

job.wait_until_done!

database = database_admin_client.get_database name: db_path
restore_info = database.restore_info
puts "Database #{restore_info.backup_info.source_database} was restored to #{database_id} from backup #{restore_info.backup_info.backup} with version time #{restore_info.backup_info.version_time}"

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