Use CreateDBSnapshot with an AWS SDK or CLI

    /// <summary>
    /// Create a snapshot of a DB instance.
    /// </summary>
    /// <param name="dbInstanceIdentifier">DB instance identifier.</param>
    /// <param name="snapshotIdentifier">Identifier for the snapshot.</param>
    /// <returns>DB snapshot object.</returns>
    public async Task<DBSnapshot> CreateDBSnapshot(string dbInstanceIdentifier, string snapshotIdentifier)
    {
        var response = await _amazonRDS.CreateDBSnapshotAsync(
            new CreateDBSnapshotRequest()
            {
                DBSnapshotIdentifier = snapshotIdentifier,
                DBInstanceIdentifier = dbInstanceIdentifier
            });

        return response.DBSnapshot;
    }

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::RDS::RDSClient client(clientConfig);

            Aws::RDS::Model::CreateDBSnapshotRequest request;
            request.SetDBInstanceIdentifier(DB_INSTANCE_IDENTIFIER);
            request.SetDBSnapshotIdentifier(snapshotID);

            Aws::RDS::Model::CreateDBSnapshotOutcome outcome =
                    client.CreateDBSnapshot(request);

            if (outcome.IsSuccess()) {
                std::cout << "Snapshot creation has started."
                          << std::endl;
            }
            else {
                std::cerr << "Error with RDS::CreateDBSnapshot. "
                          << outcome.GetError().GetMessage()
                          << std::endl;
                cleanUpResources(PARAMETER_GROUP_NAME, DB_INSTANCE_IDENTIFIER, client);
                return false;
            }

To create a DB snapshot

The following create-db-snapshot example creates a DB snapshot.

aws rds create-db-snapshot \
    --db-instance-identifier database-mysql \
    --db-snapshot-identifier mydbsnapshot

Output:

{
    "DBSnapshot": {
        "DBSnapshotIdentifier": "mydbsnapshot",
        "DBInstanceIdentifier": "database-mysql",
        "Engine": "mysql",
        "AllocatedStorage": 100,
        "Status": "creating",
        "Port": 3306,
        "AvailabilityZone": "us-east-1b",
        "VpcId": "vpc-6594f31c",
        "InstanceCreateTime": "2019-04-30T15:45:53.663Z",
        "MasterUsername": "admin",
        "EngineVersion": "5.6.40",
        "LicenseModel": "general-public-license",
        "SnapshotType": "manual",
        "Iops": 1000,
        "OptionGroupName": "default:mysql-5-6",
        "PercentProgress": 0,
        "StorageType": "io1",
        "Encrypted": true,
        "KmsKeyId": "arn:aws:kms:us-east-1:123456789012:key/AKIAIOSFODNN7EXAMPLE",
        "DBSnapshotArn": "arn:aws:rds:us-east-1:123456789012:snapshot:mydbsnapshot",
        "IAMDatabaseAuthenticationEnabled": false,
        "ProcessorFeatures": [],
        "DbiResourceId": "db-AKIAIOSFODNN7EXAMPLE"
    }
}

For more information, see Creating a DB Snapshot in the Amazon RDS User Guide.

import (
	"context"
	"errors"
	"log"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/rds"
	"github.com/aws/aws-sdk-go-v2/service/rds/types"
)

type DbInstances struct {
	RdsClient *rds.Client
}



// CreateSnapshot creates a snapshot of a DB instance.
func (instances *DbInstances) CreateSnapshot(ctx context.Context, instanceName string, snapshotName string) (
	*types.DBSnapshot, error) {
	output, err := instances.RdsClient.CreateDBSnapshot(ctx, &rds.CreateDBSnapshotInput{
		DBInstanceIdentifier: aws.String(instanceName),
		DBSnapshotIdentifier: aws.String(snapshotName),
	})
	if err != nil {
		log.Printf("Couldn't create snapshot %v: %v\n", snapshotName, err)
		return nil, err
	} else {
		return output.DBSnapshot, nil
	}
}

    // Create an Amazon RDS snapshot.
    public static void createSnapshot(RdsClient rdsClient, String dbInstanceIdentifier, String dbSnapshotIdentifier) {
        try {
            CreateDbSnapshotRequest snapshotRequest = CreateDbSnapshotRequest.builder()
                    .dbInstanceIdentifier(dbInstanceIdentifier)
                    .dbSnapshotIdentifier(dbSnapshotIdentifier)
                    .build();

            CreateDbSnapshotResponse response = rdsClient.createDBSnapshot(snapshotRequest);
            System.out.println("The Snapshot id is " + response.dbSnapshot().dbiResourceId());

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }

require __DIR__ . '/vendor/autoload.php';

use Aws\Exception\AwsException;



$rdsClient = new Aws\Rds\RdsClient([
    'region' => 'us-east-2'
]);

$dbIdentifier = '<<{{db-identifier}}>>';
$snapshotName = '<<{{backup_2018_12_25}}>>';

try {
    $result = $rdsClient->createDBSnapshot([
        'DBInstanceIdentifier' => $dbIdentifier,
        'DBSnapshotIdentifier' => $snapshotName,
    ]);
    var_dump($result);
} catch (AwsException $e) {
    echo $e->getMessage();
    echo "\n";
}

class InstanceWrapper:
    """Encapsulates Amazon RDS DB instance actions."""

    def __init__(self, rds_client):
        """
        :param rds_client: A Boto3 Amazon RDS client.
        """
        self.rds_client = rds_client

    @classmethod
    def from_client(cls):
        """
        Instantiates this class from a Boto3 client.
        """
        rds_client = boto3.client("rds")
        return cls(rds_client)


    def create_snapshot(self, snapshot_id, instance_id):
        """
        Creates a snapshot of a DB instance.

        :param snapshot_id: The ID to give the created snapshot.
        :param instance_id: The ID of the DB instance to snapshot.
        :return: Data about the newly created snapshot.
        """
        try:
            response = self.rds_client.create_db_snapshot(
                DBSnapshotIdentifier=snapshot_id, DBInstanceIdentifier=instance_id
            )
            snapshot = response["DBSnapshot"]
        except ClientError as err:
            logger.error(
                "Couldn't create snapshot of %s. Here's why: %s: %s",
                instance_id,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return snapshot

require 'aws-sdk-rds' # v2: require 'aws-sdk'

# Create a snapshot for an Amazon Relational Database Service (Amazon RDS)
# DB instance.
#
# @param rds_resource [Aws::RDS::Resource] The resource containing SDK logic.
# @param db_instance_name [String] The name of the Amazon RDS DB instance.
# @return [Aws::RDS::DBSnapshot, nil] The snapshot created, or nil if error.
def create_snapshot(rds_resource, db_instance_name)
  id = "snapshot-#{rand(10**6)}"
  db_instance = rds_resource.db_instance(db_instance_name)
  db_instance.create_snapshot({
                                db_snapshot_identifier: id
                              })
rescue Aws::Errors::ServiceError => e
  puts "Couldn't create DB instance snapshot #{id}:\n #{e.message}"
end