Memulihkan basis data dari cadangan

Memulihkan database dari cadangan.

Jelajahi lebih lanjut

Untuk dokumentasi mendetail yang menyertakan contoh kode ini, lihat artikel berikut:

• Mencadangkan dan memulihkan database menggunakan library klien
• Memulihkan data menggunakan pemulihan point-in-time (PITR)

Contoh kode

C++

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

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#

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

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

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

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
}

Java

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

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

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

// 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

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

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

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

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

Untuk mempelajari cara menginstal dan menggunakan library klien untuk Spanner, lihat library klien Spanner.

Untuk mengautentikasi ke Spanner, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, baca Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

# 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}"

Langkah selanjutnya

Untuk menelusuri dan memfilter contoh kode untuk produk Google Cloud lainnya, lihat browser contoh Google Cloud.