Crea backup

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Crea un backup del database utilizzabile per ripristinare il database.

Per saperne di più

Per una documentazione dettagliata che includa questo esempio di codice, consulta quanto segue:

Esempio di codice

C#

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.


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

public class CreateBackupSample
{
    public Backup CreateBackup(string projectId, string instanceId, string databaseId, string backupId, DateTime versionTime)
    {
        // Create the DatabaseAdminClient instance.
        DatabaseAdminClient databaseAdminClient = DatabaseAdminClient.Create();

        // Initialize request parameters.
        Backup backup = new Backup
        {
            DatabaseAsDatabaseName = DatabaseName.FromProjectInstanceDatabase(projectId, instanceId, databaseId),
            ExpireTime = DateTime.UtcNow.AddDays(14).ToTimestamp(),
            VersionTime = versionTime.ToTimestamp(),
        };
        InstanceName instanceName = InstanceName.FromProjectInstance(projectId, instanceId);

        // Make the CreateBackup request.
        Operation<Backup, CreateBackupMetadata> response = databaseAdminClient.CreateBackup(instanceName, backup, backupId);

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

        // Poll until the returned long-running operation is complete.
        Operation<Backup, CreateBackupMetadata> completedResponse = response.PollUntilCompleted();

        if (completedResponse.IsFaulted)
        {
            Console.WriteLine($"Error while creating backup: {completedResponse.Exception}");
            throw completedResponse.Exception;
        }

        Console.WriteLine($"Backup created successfully.");

        // GetBackup to get more information about the created backup.
        BackupName backupName = BackupName.FromProjectInstanceBackup(projectId, instanceId, backupId);
        backup = databaseAdminClient.GetBackup(backupName);
        Console.WriteLine($"Backup {backup.Name} of size {backup.SizeBytes} bytes " +
                      $"was created at {backup.CreateTime} from {backup.Database} " +
                      $"and is in state {backup.State} " +
                      $"and has version time {backup.VersionTime.ToDateTime()}");
        return backup;
    }
}

C++

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.

void CreateBackup(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::Timestamp expire_time,
                  google::cloud::spanner::Timestamp version_time) {
  google::cloud::spanner::Database database(project_id, instance_id,
                                            database_id);
  google::spanner::admin::database::v1::CreateBackupRequest request;
  request.set_parent(database.instance().FullName());
  request.set_backup_id(backup_id);
  request.mutable_backup()->set_database(database.FullName());
  *request.mutable_backup()->mutable_expire_time() =
      expire_time.get<google::protobuf::Timestamp>().value();
  *request.mutable_backup()->mutable_version_time() =
      version_time.get<google::protobuf::Timestamp>().value();
  auto backup = client.CreateBackup(request).get();
  if (!backup) throw std::move(backup).status();
  std::cout
      << "Backup " << backup->name() << " of " << backup->database()
      << " of size " << backup->size_bytes() << " bytes as of "
      << google::cloud::spanner::MakeTimestamp(backup->version_time()).value()
      << " was created at "
      << google::cloud::spanner::MakeTimestamp(backup->create_time()).value()
      << ".\n";
}

Go

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.


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

	database "cloud.google.com/go/spanner/admin/database/apiv1"
	pbt "github.com/golang/protobuf/ptypes/timestamp"
	adminpb "google.golang.org/genproto/googleapis/spanner/admin/database/v1"
)

func createBackup(ctx context.Context, w io.Writer, db, backupID string, versionTime time.Time) error {
	// versionTime := time.Now().AddDate(0, 0, -1) // one day ago
	matches := regexp.MustCompile("^(.+)/databases/(.+)$").FindStringSubmatch(db)
	if matches == nil || len(matches) != 3 {
		return fmt.Errorf("createBackup: invalid database id %q", db)
	}

	adminClient, err := database.NewDatabaseAdminClient(ctx)
	if err != nil {
		return fmt.Errorf("createBackup.NewDatabaseAdminClient: %v", err)
	}
	defer adminClient.Close()

	expireTime := time.Now().AddDate(0, 0, 14)
	// Create a backup.
	req := adminpb.CreateBackupRequest{
		Parent:   matches[1],
		BackupId: backupID,
		Backup: &adminpb.Backup{
			Database:    db,
			ExpireTime:  &pbt.Timestamp{Seconds: expireTime.Unix(), Nanos: int32(expireTime.Nanosecond())},
			VersionTime: &pbt.Timestamp{Seconds: versionTime.Unix(), Nanos: int32(versionTime.Nanosecond())},
		},
	}
	op, err := adminClient.CreateBackup(ctx, &req)
	if err != nil {
		return fmt.Errorf("createBackup.CreateBackup: %v", err)
	}
	// Wait for backup operation to complete.
	backup, err := op.Wait(ctx)
	if err != nil {
		return fmt.Errorf("createBackup.Wait: %v", err)
	}

	// Get the name, create time, version time and backup size.
	backupCreateTime := time.Unix(backup.CreateTime.Seconds, int64(backup.CreateTime.Nanos))
	backupVersionTime := time.Unix(backup.VersionTime.Seconds, int64(backup.VersionTime.Nanos))
	fmt.Fprintf(w,
		"Backup %s of size %d bytes was created at %s with version time %s\n",
		backup.Name,
		backup.SizeBytes,
		backupCreateTime.Format(time.RFC3339),
		backupVersionTime.Format(time.RFC3339))
	return nil
}

Java

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.

static void createBackup(DatabaseAdminClient dbAdminClient, DatabaseId databaseId,
    BackupId backupId, Timestamp versionTime) {
  // Set expire time to 14 days from now.
  Timestamp expireTime = Timestamp.ofTimeMicroseconds(TimeUnit.MICROSECONDS.convert(
      System.currentTimeMillis() + TimeUnit.DAYS.toMillis(14), TimeUnit.MILLISECONDS));
  Backup backup =
      dbAdminClient
          .newBackupBuilder(backupId)
          .setDatabase(databaseId)
          .setExpireTime(expireTime)
          .setVersionTime(versionTime)
          .build();
  // Initiate the request which returns an OperationFuture.
  System.out.println("Creating backup [" + backup.getId() + "]...");
  OperationFuture<Backup, CreateBackupMetadata> op = backup.create();
  try {
    // Wait for the backup operation to complete.
    backup = op.get();
    System.out.println("Created backup [" + backup.getId() + "]");
  } catch (ExecutionException e) {
    throw (SpannerException) e.getCause();
  } catch (InterruptedException e) {
    throw SpannerExceptionFactory.propagateInterrupt(e);
  }

  // Reload the metadata of the backup from the server.
  backup = backup.reload();
  System.out.println(
      String.format(
          "Backup %s of size %d bytes was created at %s for version of database at %s",
          backup.getId().getName(),
          backup.getSize(),
          LocalDateTime.ofEpochSecond(
              backup.getProto().getCreateTime().getSeconds(),
              backup.getProto().getCreateTime().getNanos(),
              OffsetDateTime.now().getOffset()),
          LocalDateTime.ofEpochSecond(
              backup.getProto().getVersionTime().getSeconds(),
              backup.getProto().getVersionTime().getNanos(),
              OffsetDateTime.now().getOffset())
          ));
}

Node.js

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.

// 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';
// const versionTime = Date.now() - 1000 * 60 * 60 * 24; // One day ago

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

// Gets a reference to a Cloud Spanner instance and database
const instance = spanner.instance(instanceId);
const database = instance.database(databaseId);

const backup = instance.backup(backupId);

// Creates a new backup of the database
try {
  console.log(`Creating backup of database ${database.formattedName_}.`);
  const databasePath = database.formattedName_;
  // Expire backup 14 days in the future
  const expireTime = Date.now() + 1000 * 60 * 60 * 24 * 14;
  // Create a backup of the state of the database at the current time.
  const [, operation] = await backup.create({
    databasePath: databasePath,
    expireTime: expireTime,
    versionTime: versionTime,
  });

  console.log(`Waiting for backup ${backup.formattedName_} to complete...`);
  await operation.promise();

  // Verify backup is ready
  const [backupInfo] = await backup.getMetadata();
  if (backupInfo.state === 'READY') {
    console.log(
      `Backup ${backupInfo.name} of size ` +
        `${backupInfo.sizeBytes} bytes was created at ` +
        `${new PreciseDate(backupInfo.createTime).toISOString()} ` +
        'for version of database at ' +
        `${new PreciseDate(backupInfo.versionTime).toISOString()}`
    );
  } else {
    console.error('ERROR: Backup is not ready.');
  }
} catch (err) {
  console.error('ERROR:', err);
} finally {
  // Close the database when finished.
  await database.close();
}

PHP

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.

use Google\Cloud\Spanner\Backup;
use Google\Cloud\Spanner\SpannerClient;

/**
 * Create a backup.
 * Example:
 * ```
 * create_backup($instanceId, $databaseId, $backupId, $versionTime);
 * ```
 *
 * @param string $instanceId The Spanner instance ID.
 * @param string $databaseId The Spanner database ID.
 * @param string $backupId The Spanner backup ID.
 * @param string $versionTime The version of the database to backup.
 */
function create_backup(string $instanceId, string $databaseId, string $backupId, string $versionTime): void
{
    $spanner = new SpannerClient();
    $instance = $spanner->instance($instanceId);
    $database = $instance->database($databaseId);

    $expireTime = new \DateTime('+14 days');
    $backup = $instance->backup($backupId);
    $operation = $backup->create($database->name(), $expireTime, [
        'versionTime' => new \DateTime($versionTime)
    ]);

    print('Waiting for operation to complete...' . PHP_EOL);
    $operation->pollUntilComplete();

    $backup->reload();
    $ready = ($backup->state() == Backup::STATE_READY);

    if ($ready) {
        print('Backup is ready!' . PHP_EOL);
        $info = $backup->info();
        printf(
            'Backup %s of size %d bytes was created at %s for version of database at %s' . PHP_EOL,
            basename($info['name']), $info['sizeBytes'], $info['createTime'], $info['versionTime']);
    } else {
        printf('Unexpected state: %s' . PHP_EOL, $backup->state());
    }
}

Python

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.

def create_backup(instance_id, database_id, backup_id, version_time):
    """Creates a backup for a database."""
    spanner_client = spanner.Client()
    instance = spanner_client.instance(instance_id)
    database = instance.database(database_id)

    # Create a backup
    expire_time = datetime.utcnow() + timedelta(days=14)
    backup = instance.backup(
        backup_id, database=database, expire_time=expire_time, version_time=version_time
    )
    operation = backup.create()

    # Wait for backup operation to complete.
    operation.result(2100)

    # Verify that the backup is ready.
    backup.reload()
    assert backup.is_ready() is True

    # Get the name, create time and backup size.
    backup.reload()
    print(
        "Backup {} of size {} bytes was created at {} for version of database at {}".format(
            backup.name, backup.size_bytes, backup.create_time, backup.version_time
        )
    )

Ruby

Per scoprire come installare e utilizzare la libreria client per Spanner, consulta Librerie client di Colab.

# project_id  = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
# backup_id = "Your Spanner backup ID"
# version_time = Time.now - 60 * 60 * 24 # 1 day ago

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
expire_time = Time.now + (14 * 24 * 3600) # 14 days from now

job = database_admin_client.create_backup parent: instance_path,
                                          backup_id: backup_id,
                                          backup: {
                                            database: db_path,
                                              expire_time: expire_time,
                                              version_time: version_time
                                          }

puts "Backup operation in progress"

job.wait_until_done!

backup = database_admin_client.get_backup name: backup_path
puts "Backup #{backup_id} of size #{backup.size_bytes} bytes was created at #{backup.create_time} for version of database at #{backup.version_time}"

Passaggi successivi

Per cercare e filtrare esempi di codice per altri prodotti Google Cloud, consulta la pagina Browser di esempio Google Cloud.