AWS API Changes

2017/01/25 - Amazon Relational Database Service - 1 updated api methods

Changes Fixes issue wherein the wrong parameter name was used for cross region presigned urls. Adds cross region read replica copying.

CreateDBInstanceReadReplica (updated)

Link ¶
Changes (request)

{'KmsKeyId': 'string', 'PreSignedUrl': 'string'}

Creates a DB instance for a DB instance running MySQL, MariaDB, or PostgreSQL that acts as a Read Replica of a source DB instance.

All Read Replica DB instances are created as Single-AZ deployments with backups disabled. All other DB instance attributes (including DB security groups and DB parameter groups) are inherited from the source DB instance, except as specified below.

Warning

The source DB instance must have backup retention enabled.

See also: AWS API Documentation

Request Syntax

client.create_db_instance_read_replica(
    DBInstanceIdentifier='string',
    SourceDBInstanceIdentifier='string',
    DBInstanceClass='string',
    AvailabilityZone='string',
    Port=123,
    AutoMinorVersionUpgrade=True|False,
    Iops=123,
    OptionGroupName='string',
    PubliclyAccessible=True|False,
    Tags=[
        {
            'Key': 'string',
            'Value': 'string'
        },
    ],
    DBSubnetGroupName='string',
    StorageType='string',
    CopyTagsToSnapshot=True|False,
    MonitoringInterval=123,
    MonitoringRoleArn='string',
    KmsKeyId='string',
    PreSignedUrl='string'
)

type DBInstanceIdentifier

string

param DBInstanceIdentifier

[REQUIRED]

The DB instance identifier of the Read Replica. This identifier is the unique key that identifies a DB instance. This parameter is stored as a lowercase string.

type SourceDBInstanceIdentifier

string

param SourceDBInstanceIdentifier

[REQUIRED]

The identifier of the DB instance that will act as the source for the Read Replica. Each DB instance can have up to five Read Replicas.

Constraints:

Must be the identifier of an existing MySQL, MariaDB, or PostgreSQL DB instance.
Can specify a DB instance that is a MySQL Read Replica only if the source is running MySQL 5.6.
Can specify a DB instance that is a PostgreSQL DB instance only if the source is running PostgreSQL 9.3.5 or later.
The specified DB instance must have automatic backups enabled, its backup retention period must be greater than 0.
If the source DB instance is in the same region as the Read Replica, specify a valid DB instance identifier.
If the source DB instance is in a different region than the Read Replica, specify a valid DB instance ARN. For more information, go to Constructing a Amazon RDS Amazon Resource Name (ARN).

type DBInstanceClass

string

param DBInstanceClass

The compute and memory capacity of the Read Replica. Note that not all instance classes are available in all regions for all DB engines.

Default: Inherits from the source DB instance.

type AvailabilityZone

string

param AvailabilityZone

The Amazon EC2 Availability Zone that the Read Replica will be created in.

Default: A random, system-chosen Availability Zone in the endpoint's region.

Example: us-east-1d

type Port

integer

param Port

The port number that the DB instance uses for connections.

Default: Inherits from the source DB instance

Valid Values: 1150-65535

type AutoMinorVersionUpgrade

boolean

param AutoMinorVersionUpgrade

Indicates that minor engine upgrades will be applied automatically to the Read Replica during the maintenance window.

Default: Inherits from the source DB instance

type Iops

integer

param Iops

The amount of Provisioned IOPS (input/output operations per second) to be initially allocated for the DB instance.

type OptionGroupName

string

param OptionGroupName

The option group the DB instance will be associated with. If omitted, the default option group for the engine specified will be used.

type PubliclyAccessible

boolean

param PubliclyAccessible

Specifies the accessibility options for the DB instance. A value of true specifies an Internet-facing instance with a publicly resolvable DNS name, which resolves to a public IP address. A value of false specifies an internal instance with a DNS name that resolves to a private IP address.

Default: The default behavior varies depending on whether a VPC has been requested or not. The following list shows the default behavior in each case.

Default VPC: true
VPC: false

If no DB subnet group has been specified as part of the request and the PubliclyAccessible value has not been set, the DB instance will be publicly accessible. If a specific DB subnet group has been specified as part of the request and the PubliclyAccessible value has not been set, the DB instance will be private.

type Tags

list

param Tags

A list of tags.

(dict) --

Metadata assigned to an Amazon RDS resource consisting of a key-value pair.
- Key (string) --
  
  A key is the required name of the tag. The string value can be from 1 to 128 Unicode characters in length and cannot be prefixed with "aws:" or "rds:". The string can only contain only the set of Unicode letters, digits, white-space, '_', '.', '/', '=', '+', '-' (Java regex: "^([\p{L}\p{Z}\p{N}_.:/=+\-]*)$").
- Value (string) --
  
  A value is the optional value of the tag. The string value can be from 1 to 256 Unicode characters in length and cannot be prefixed with "aws:" or "rds:". The string can only contain only the set of Unicode letters, digits, white-space, '_', '.', '/', '=', '+', '-' (Java regex: "^([\p{L}\p{Z}\p{N}_.:/=+\-]*)$").

type DBSubnetGroupName

string

param DBSubnetGroupName

Specifies a DB subnet group for the DB instance. The new DB instance will be created in the VPC associated with the DB subnet group. If no DB subnet group is specified, then the new DB instance is not created in a VPC.

Constraints:

Can only be specified if the source DB instance identifier specifies a DB instance in another region.
The specified DB subnet group must be in the same region in which the operation is running.
All Read Replicas in one region that are created from the same source DB instance must either:>
- Specify DB subnet groups from the same VPC. All these Read Replicas will be created in the same VPC.
- Not specify a DB subnet group. All these Read Replicas will be created outside of any VPC.

Constraints: Must contain no more than 255 alphanumeric characters, periods, underscores, spaces, or hyphens. Must not be default.

Example: mySubnetgroup

type StorageType

string

param StorageType

Specifies the storage type to be associated with the Read Replica.

Valid values: standard | gp2 | io1

If you specify io1 , you must also include a value for the Iops parameter.

Default: io1 if the Iops parameter is specified; otherwise standard

type CopyTagsToSnapshot

boolean

param CopyTagsToSnapshot

True to copy all tags from the Read Replica to snapshots of the Read Replica; otherwise false. The default is false.

type MonitoringInterval

integer

param MonitoringInterval

The interval, in seconds, between points when Enhanced Monitoring metrics are collected for the Read Replica. To disable collecting Enhanced Monitoring metrics, specify 0. The default is 0.

If MonitoringRoleArn is specified, then you must also set MonitoringInterval to a value other than 0.

Valid Values: 0, 1, 5, 10, 15, 30, 60

type MonitoringRoleArn

string

param MonitoringRoleArn

The ARN for the IAM role that permits RDS to send enhanced monitoring metrics to CloudWatch Logs. For example, arn:aws:iam:123456789012:role/emaccess . For information on creating a monitoring role, go to To create an IAM role for Amazon RDS Enhanced Monitoring.

If MonitoringInterval is set to a value other than 0, then you must supply a MonitoringRoleArn value.

type KmsKeyId

string

param KmsKeyId

The AWS KMS key ID for an encrypted Read Replica. The KMS key ID is the Amazon Resource Name (ARN), KMS key identifier, or the KMS key alias for the KMS encryption key.

If you create an unencrypted Read Replica and specify a value for the KmsKeyId parameter, Amazon RDS encrypts the target Read Replica using the specified KMS encryption key.

If you create an encrypted Read Replica from your AWS account, you can specify a value for KmsKeyId to encrypt the Read Replica with a new KMS encryption key. If you don't specify a value for KmsKeyId , then the Read Replica is encrypted with the same KMS key as the source DB instance.

If you create an encrypted Read Replica in a different AWS region, then you must specify a KMS key for the destination AWS region. KMS encryption keys are specific to the region that they are created in, and you cannot use encryption keys from one region in another region.

type PreSignedUrl

string

param PreSignedUrl

The URL that contains a Signature Version 4 signed request for the CreateDBInstanceReadReplica API action in the AWS region that contains the source DB instance. The PreSignedUrl parameter must be used when encrypting a Read Replica from another AWS region.

The presigned URL must be a valid request for the CreateDBInstanceReadReplica API action that can be executed in the source region that contains the encrypted DB instance. The presigned URL request must contain the following parameter values:

DestinationRegion - The AWS Region that the Read Replica is created in. This region is the same one where the CreateDBInstanceReadReplica action is called that contains this presigned URL. For example, if you create an encrypted Read Replica in the us-east-1 region, and the source DB instance is in the west-2 region, then you call the CreateDBInstanceReadReplica action in the us-east-1 region and provide a presigned URL that contains a call to the CreateDBInstanceReadReplica action in the us-west-2 region. For this example, the DestinationRegion in the presigned URL must be set to the us-east-1 region.
KmsKeyId - The KMS key identifier for the key to use to encrypt the Read Replica in the destination region. This is the same identifier for both the CreateDBInstanceReadReplica action that is called in the destination region, and the action contained in the presigned URL.
SourceDBInstanceIdentifier - The DB instance identifier for the encrypted Read Replica to be created. This identifier must be in the Amazon Resource Name (ARN) format for the source region. For example, if you create an encrypted Read Replica from a DB instance in the us-west-2 region, then your SourceDBInstanceIdentifier would look like this example: arn:aws:rds:us-west-2:123456789012:instance:mysql-instance1-instance-20161115 .

To learn how to generate a Signature Version 4 signed request, see Authenticating Requests: Using Query Parameters (AWS Signature Version 4) and Signature Version 4 Signing Process.

rtype

dict

returns

Response Syntax

{
    'DBInstance': {
        'DBInstanceIdentifier': 'string',
        'DBInstanceClass': 'string',
        'Engine': 'string',
        'DBInstanceStatus': 'string',
        'MasterUsername': 'string',
        'DBName': 'string',
        'Endpoint': {
            'Address': 'string',
            'Port': 123,
            'HostedZoneId': 'string'
        },
        'AllocatedStorage': 123,
        'InstanceCreateTime': datetime(2015, 1, 1),
        'PreferredBackupWindow': 'string',
        'BackupRetentionPeriod': 123,
        'DBSecurityGroups': [
            {
                'DBSecurityGroupName': 'string',
                'Status': 'string'
            },
        ],
        'VpcSecurityGroups': [
            {
                'VpcSecurityGroupId': 'string',
                'Status': 'string'
            },
        ],
        'DBParameterGroups': [
            {
                'DBParameterGroupName': 'string',
                'ParameterApplyStatus': 'string'
            },
        ],
        'AvailabilityZone': 'string',
        'DBSubnetGroup': {
            'DBSubnetGroupName': 'string',
            'DBSubnetGroupDescription': 'string',
            'VpcId': 'string',
            'SubnetGroupStatus': 'string',
            'Subnets': [
                {
                    'SubnetIdentifier': 'string',
                    'SubnetAvailabilityZone': {
                        'Name': 'string'
                    },
                    'SubnetStatus': 'string'
                },
            ],
            'DBSubnetGroupArn': 'string'
        },
        'PreferredMaintenanceWindow': 'string',
        'PendingModifiedValues': {
            'DBInstanceClass': 'string',
            'AllocatedStorage': 123,
            'MasterUserPassword': 'string',
            'Port': 123,
            'BackupRetentionPeriod': 123,
            'MultiAZ': True|False,
            'EngineVersion': 'string',
            'LicenseModel': 'string',
            'Iops': 123,
            'DBInstanceIdentifier': 'string',
            'StorageType': 'string',
            'CACertificateIdentifier': 'string',
            'DBSubnetGroupName': 'string'
        },
        'LatestRestorableTime': datetime(2015, 1, 1),
        'MultiAZ': True|False,
        'EngineVersion': 'string',
        'AutoMinorVersionUpgrade': True|False,
        'ReadReplicaSourceDBInstanceIdentifier': 'string',
        'ReadReplicaDBInstanceIdentifiers': [
            'string',
        ],
        'ReadReplicaDBClusterIdentifiers': [
            'string',
        ],
        'LicenseModel': 'string',
        'Iops': 123,
        'OptionGroupMemberships': [
            {
                'OptionGroupName': 'string',
                'Status': 'string'
            },
        ],
        'CharacterSetName': 'string',
        'SecondaryAvailabilityZone': 'string',
        'PubliclyAccessible': True|False,
        'StatusInfos': [
            {
                'StatusType': 'string',
                'Normal': True|False,
                'Status': 'string',
                'Message': 'string'
            },
        ],
        'StorageType': 'string',
        'TdeCredentialArn': 'string',
        'DbInstancePort': 123,
        'DBClusterIdentifier': 'string',
        'StorageEncrypted': True|False,
        'KmsKeyId': 'string',
        'DbiResourceId': 'string',
        'CACertificateIdentifier': 'string',
        'DomainMemberships': [
            {
                'Domain': 'string',
                'Status': 'string',
                'FQDN': 'string',
                'IAMRoleName': 'string'
            },
        ],
        'CopyTagsToSnapshot': True|False,
        'MonitoringInterval': 123,
        'EnhancedMonitoringResourceArn': 'string',
        'MonitoringRoleArn': 'string',
        'PromotionTier': 123,
        'DBInstanceArn': 'string',
        'Timezone': 'string'
    }
}

Response Structure

(dict) --
- DBInstance (dict) --
  
  Contains the result of a successful invocation of the following actions:
  - CreateDBInstance
  - DeleteDBInstance
  - ModifyDBInstance
  This data type is used as a response element in the DescribeDBInstances action.
  - DBInstanceIdentifier (string) --
    
    Contains a user-supplied database identifier. This identifier is the unique key that identifies a DB instance.
  - DBInstanceClass (string) --
    
    Contains the name of the compute and memory capacity class of the DB instance.
  - Engine (string) --
    
    Provides the name of the database engine to be used for this DB instance.
  - DBInstanceStatus (string) --
    
    Specifies the current state of this database.
  - MasterUsername (string) --
    
    Contains the master username for the DB instance.
  - DBName (string) --
    
    The meaning of this parameter differs according to the database engine you use. For example, this value returns MySQL, MariaDB, or PostgreSQL information when returning values from CreateDBInstanceReadReplica since Read Replicas are only supported for these engines.
    
    MySQL, MariaDB, SQL Server, PostgreSQL, Amazon Aurora
    
    Contains the name of the initial database of this instance that was provided at create time, if one was specified when the DB instance was created. This same name is returned for the life of the DB instance.
    
    Type: String
    
    Oracle
    
    Contains the Oracle System ID (SID) of the created DB instance. Not shown when the returned parameters do not apply to an Oracle DB instance.
  - Endpoint (dict) --
    
    Specifies the connection endpoint.
    - Address (string) --
      
      Specifies the DNS address of the DB instance.
    - Port (integer) --
      
      Specifies the port that the database engine is listening on.
    - HostedZoneId (string) --
      
      Specifies the ID that Amazon Route 53 assigns when you create a hosted zone.
  - AllocatedStorage (integer) --
    
    Specifies the allocated storage size specified in gigabytes.
  - InstanceCreateTime (datetime) --
    
    Provides the date and time the DB instance was created.
  - PreferredBackupWindow (string) --
    
    Specifies the daily time range during which automated backups are created if automated backups are enabled, as determined by the BackupRetentionPeriod .
  - BackupRetentionPeriod (integer) --
    
    Specifies the number of days for which automatic DB snapshots are retained.
  - DBSecurityGroups (list) --
    
    Provides List of DB security group elements containing only DBSecurityGroup.Name and DBSecurityGroup.Status subelements.
    - (dict) --
      
      This data type is used as a response element in the following actions:
      - ModifyDBInstance
      - RebootDBInstance
      - RestoreDBInstanceFromDBSnapshot
      - RestoreDBInstanceToPointInTime
      - DBSecurityGroupName (string) --
        
        The name of the DB security group.
      - Status (string) --
        
        The status of the DB security group.
  - VpcSecurityGroups (list) --
    
    Provides a list of VPC security group elements that the DB instance belongs to.
    - (dict) --
      
      This data type is used as a response element for queries on VPC security group membership.
      - VpcSecurityGroupId (string) --
        
        The name of the VPC security group.
      - Status (string) --
        
        The status of the VPC security group.
  - DBParameterGroups (list) --
    
    Provides the list of DB parameter groups applied to this DB instance.
    - (dict) --
      
      The status of the DB parameter group.
      
      This data type is used as a response element in the following actions:
      - CreateDBInstance
      - CreateDBInstanceReadReplica
      - DeleteDBInstance
      - ModifyDBInstance
      - RebootDBInstance
      - RestoreDBInstanceFromDBSnapshot
      - DBParameterGroupName (string) --
        
        The name of the DP parameter group.
      - ParameterApplyStatus (string) --
        
        The status of parameter updates.
  - AvailabilityZone (string) --
    
    Specifies the name of the Availability Zone the DB instance is located in.
  - DBSubnetGroup (dict) --
    
    Specifies information on the subnet group associated with the DB instance, including the name, description, and subnets in the subnet group.
    - DBSubnetGroupName (string) --
      
      The name of the DB subnet group.
    - DBSubnetGroupDescription (string) --
      
      Provides the description of the DB subnet group.
    - VpcId (string) --
      
      Provides the VpcId of the DB subnet group.
    - SubnetGroupStatus (string) --
      
      Provides the status of the DB subnet group.
    - Subnets (list) --
      
      Contains a list of Subnet elements.
      - (dict) --
        
        This data type is used as a response element in the DescribeDBSubnetGroups action.
        
        SubnetIdentifier (string) --
        
        Specifies the identifier of the subnet.
        
        SubnetAvailabilityZone (dict) --
        
        Contains Availability Zone information.
        
        This data type is used as an element in the following data type:
        
        OrderableDBInstanceOption
        
        Name (string) --
        
        The name of the availability zone.
        
        SubnetStatus (string) --
        
        Specifies the status of the subnet.
    - DBSubnetGroupArn (string) --
      
      The Amazon Resource Name (ARN) for the DB subnet group.
  - PreferredMaintenanceWindow (string) --
    
    Specifies the weekly time range during which system maintenance can occur, in Universal Coordinated Time (UTC).
  - PendingModifiedValues (dict) --
    
    Specifies that changes to the DB instance are pending. This element is only included when changes are pending. Specific changes are identified by subelements.
    - DBInstanceClass (string) --
      
      Contains the new DBInstanceClass for the DB instance that will be applied or is in progress.
    - AllocatedStorage (integer) --
      
      Contains the new AllocatedStorage size for the DB instance that will be applied or is in progress.
    - MasterUserPassword (string) --
      
      Contains the pending or in-progress change of the master credentials for the DB instance.
    - Port (integer) --
      
      Specifies the pending port for the DB instance.
    - BackupRetentionPeriod (integer) --
      
      Specifies the pending number of days for which automated backups are retained.
    - MultiAZ (boolean) --
      
      Indicates that the Single-AZ DB instance is to change to a Multi-AZ deployment.
    - EngineVersion (string) --
      
      Indicates the database engine version.
    - LicenseModel (string) --
      
      The license model for the DB instance.
      
      Valid values: license-included | bring-your-own-license | general-public-license
    - Iops (integer) --
      
      Specifies the new Provisioned IOPS value for the DB instance that will be applied or is being applied.
    - DBInstanceIdentifier (string) --
      
      Contains the new DBInstanceIdentifier for the DB instance that will be applied or is in progress.
    - StorageType (string) --
      
      Specifies the storage type to be associated with the DB instance.
    - CACertificateIdentifier (string) --
      
      Specifies the identifier of the CA certificate for the DB instance.
    - DBSubnetGroupName (string) --
      
      The new DB subnet group for the DB instance.
  - LatestRestorableTime (datetime) --
    
    Specifies the latest time to which a database can be restored with point-in-time restore.
  - MultiAZ (boolean) --
    
    Specifies if the DB instance is a Multi-AZ deployment.
  - EngineVersion (string) --
    
    Indicates the database engine version.
  - AutoMinorVersionUpgrade (boolean) --
    
    Indicates that minor version patches are applied automatically.
  - ReadReplicaSourceDBInstanceIdentifier (string) --
    
    Contains the identifier of the source DB instance if this DB instance is a Read Replica.
  - ReadReplicaDBInstanceIdentifiers (list) --
    
    Contains one or more identifiers of the Read Replicas associated with this DB instance.
    - (string) --
  - ReadReplicaDBClusterIdentifiers (list) --
    
    Contains one or more identifiers of Aurora DB clusters that are Read Replicas of this DB instance.
    - (string) --
  - LicenseModel (string) --
    
    License model information for this DB instance.
  - Iops (integer) --
    
    Specifies the Provisioned IOPS (I/O operations per second) value.
  - OptionGroupMemberships (list) --
    
    Provides the list of option group memberships for this DB instance.
    - (dict) --
      
      Provides information on the option groups the DB instance is a member of.
      - OptionGroupName (string) --
        
        The name of the option group that the instance belongs to.
      - Status (string) --
        
        The status of the DB instance's option group membership. Valid values are: in-sync , pending-apply , pending-removal , pending-maintenance-apply , pending-maintenance-removal , applying , removing , and failed .
  - CharacterSetName (string) --
    
    If present, specifies the name of the character set that this instance is associated with.
  - SecondaryAvailabilityZone (string) --
    
    If present, specifies the name of the secondary Availability Zone for a DB instance with multi-AZ support.
  - PubliclyAccessible (boolean) --
    
    Specifies the accessibility options for the DB instance. A value of true specifies an Internet-facing instance with a publicly resolvable DNS name, which resolves to a public IP address. A value of false specifies an internal instance with a DNS name that resolves to a private IP address.
    
    Default: The default behavior varies depending on whether a VPC has been requested or not. The following list shows the default behavior in each case.
    - Default VPC: true
    - VPC: false
    If no DB subnet group has been specified as part of the request and the PubliclyAccessible value has not been set, the DB instance will be publicly accessible. If a specific DB subnet group has been specified as part of the request and the PubliclyAccessible value has not been set, the DB instance will be private.
  - StatusInfos (list) --
    
    The status of a Read Replica. If the instance is not a Read Replica, this will be blank.
    - (dict) --
      
      Provides a list of status information for a DB instance.
      - StatusType (string) --
        
        This value is currently "read replication."
      - Normal (boolean) --
        
        Boolean value that is true if the instance is operating normally, or false if the instance is in an error state.
      - Status (string) --
        
        Status of the DB instance. For a StatusType of read replica, the values can be replicating, error, stopped, or terminated.
      - Message (string) --
        
        Details of the error if there is an error for the instance. If the instance is not in an error state, this value is blank.
  - StorageType (string) --
    
    Specifies the storage type associated with DB instance.
  - TdeCredentialArn (string) --
    
    The ARN from the key store with which the instance is associated for TDE encryption.
  - DbInstancePort (integer) --
    
    Specifies the port that the DB instance listens on. If the DB instance is part of a DB cluster, this can be a different port than the DB cluster port.
  - DBClusterIdentifier (string) --
    
    If the DB instance is a member of a DB cluster, contains the name of the DB cluster that the DB instance is a member of.
  - StorageEncrypted (boolean) --
    
    Specifies whether the DB instance is encrypted.
  - KmsKeyId (string) --
    
    If StorageEncrypted is true, the KMS key identifier for the encrypted DB instance.
  - DbiResourceId (string) --
    
    The region-unique, immutable identifier for the DB instance. This identifier is found in AWS CloudTrail log entries whenever the KMS key for the DB instance is accessed.
  - CACertificateIdentifier (string) --
    
    The identifier of the CA certificate for this DB instance.
  - DomainMemberships (list) --
    
    The Active Directory Domain membership records associated with the DB instance.
    - (dict) --
      
      An Active Directory Domain membership record associated with the DB instance.
      - Domain (string) --
        
        The identifier of the Active Directory Domain.
      - Status (string) --
        
        The status of the DB instance's Active Directory Domain membership, such as joined, pending-join, failed etc).
      - FQDN (string) --
        
        The fully qualified domain name of the Active Directory Domain.
      - IAMRoleName (string) --
        
        The name of the IAM role to be used when making API calls to the Directory Service.
  - CopyTagsToSnapshot (boolean) --
    
    Specifies whether tags are copied from the DB instance to snapshots of the DB instance.
  - MonitoringInterval (integer) --
    
    The interval, in seconds, between points when Enhanced Monitoring metrics are collected for the DB instance.
  - EnhancedMonitoringResourceArn (string) --
    
    The Amazon Resource Name (ARN) of the Amazon CloudWatch Logs log stream that receives the Enhanced Monitoring metrics data for the DB instance.
  - MonitoringRoleArn (string) --
    
    The ARN for the IAM role that permits RDS to send Enhanced Monitoring metrics to CloudWatch Logs.
  - PromotionTier (integer) --
    
    A value that specifies the order in which an Aurora Replica is promoted to the primary instance after a failure of the existing primary instance. For more information, see Fault Tolerance for an Aurora DB Cluster.
  - DBInstanceArn (string) --
    
    The Amazon Resource Name (ARN) for the DB instance.
  - Timezone (string) --
    
    The time zone of the DB instance. In most cases, the Timezone element is empty. Timezone content appears only for Microsoft SQL Server DB instances that were created with a time zone specified.