Use CreateReadOnlyDBInstance to create a read-only instance - ApsaraDB RDS - Alibaba Cloud - ApsaraDB RDS

Creates a read-only instance for an ApsaraDB RDS instance.

Operation description

Supported DPI engines

RDS MySQL
RDS PostgreSQL
RDS SQL Server

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

rds:CreateReadOnlyDBInstance

create

*DBInstance

acs:rds:{#regionId}:{#accountId}:dbinstance/{#dbinstanceId}

rds:ResourceTag

None

Request parameters

Parameter	Type	Required	Description	Example
ClientToken	string	No	The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters and cannot exceed 64 characters in length.	ETnLKlblzczshOTUbOC****
RegionId	string	Yes	The region ID. The read-only instance must reside in the same region as the primary instance. You can call DescribeRegions to query the most recent region list.	cn-hangzhou
ZoneId	string	Yes	The zone ID. You can invoke DescribeRegions to query the most recent zone list. For single-zone deployment, specify a single zone ID, such as `cn-hangzhou-b`. For multi-zone deployment, specify multiple zone IDs separated by colons (:), such as `cn-hangzhou-b:cn-hangzhou-c`. The number of specified zones must be less than or equal to the number of nodes in the read-only instance. A Basic Edition read-only instance contains only one node. A High-availability Edition read-only instance contains two nodes (one primary node and one secondary node).	cn-hangzhou-b
DBInstanceId	string	Yes	The primary instance ID. You can call DescribeDBInstances to query the instance ID.	rm-uf6wjk5****
DBInstanceClass	string	Yes	The instance type. For more information, see Read-only instance types. We recommend that the instance type of the read-only instance be equal to or higher than that of the primary instance. If the instance type of the read-only instance is smaller than that of the primary instance, the read-only instance may experience high latency and heavy load.	mysqlro.n2.small.1c
DBInstanceStorage	integer	Yes	Instance storage capacity. Instance storage capacity of the read-only instance must be greater than or equal to that of the primary instance. For more information, see the Storage capacity column in Read-only instance types. The value is incremented in units of 5 GB. Unit: GB.	20
EngineVersion	string	Yes	The database engine version. The version must be the same as that of the primary instance. MySQL: 5.6, 5.7, and 8.0. SQL Server: 2017_ent, 2019_ent, and 2022_ent. PostgreSQL: 10.0, 11.0, 12.0, 13.0, 14.0, and 15.0.	5.6
PayType	string	Yes	The billing method. Valid values: Postpaid: pay-as-you-go Prepaid: subscription	Postpaid
DBInstanceDescription	string	No	The instance description. The description must be 2 to 256 characters in length and can contain letters, digits, underscores (_), and hyphens (-). The description must start with a letter or a Chinese character. Note The description cannot start with http:// or https://.	testReadOnly
InstanceNetworkType	string	No	The network type of the read-only instance. Valid values: VPC: virtual private cloud (VPC) Classic: classic network By default, a VPC-connected instance is created. You must also specify VPCId and VSwitchId. Note The network type of the read-only instance can be different from that of the primary instance.	Classic
VPCId	string	No	The VPC ID of the read-only instance. This parameter is required when InstanceNetworkType is set to VPC or left empty. Note If the storage type of the primary instance is Premium Local SSDs, the read-only instance can use any VPC. If the storage type of the primary instance is cloud disks, the VPC of the read-only instance must be the same as that of the primary instance.	vpc-uf6f7l4fg90****
VSwitchId	string	No	The vSwitch ID of the read-only instance. This parameter is required when InstanceNetworkType is set to VPC or left empty.	vsw-uf6adz52c2p****
PrivateIpAddress	string	No	The internal IP address of the read-only instance. The IP address must be within the address range of the specified vSwitch. The system automatically allocates an internal IP address based on the values of VPCId and VSwitchId by default.	172.16.XX.XX
ResourceGroupId	string	No	The resource group ID.	rg-acfmy****
Category	string	No	The instance edition. Valid values: Basic: Basic Edition HighAvailability: High-availability Edition (default) AlwaysOn: Cluster Edition Note The read-only instances of ApsaraDB RDS for PostgreSQL cloud disk instances are of the Basic Edition. You must set this parameter to Basic.	HighAvailability
DBInstanceStorageType	string	No	The storage type of the instance. Valid values: local_ssd: Premium Local SSDs cloud_ssd: standard SSDs cloud_essd: PL1 ESSDs cloud_essd2: PL2 ESSDs cloud_essd3: PL3 ESSDs general_essd: Premium ESSDs Note If the primary ApsaraDB RDS for MySQL instance uses Premium Local SSDs, only local_ssd is supported. If the primary ApsaraDB RDS for MySQL instance uses cloud disks, premium performance disk storage types are supported. ApsaraDB RDS for SQL Server supports premium performance disk storage types.	local_ssd
DedicatedHostGroupId	string	No	The dedicated cluster ID. This parameter is required when you create a read-only instance in a dedicated cluster.	dhg-4n****
TargetDedicatedHostIdForMaster	string	No	The host ID of the primary instance in the dedicated cluster. This parameter is required when you create a read-only instance in a dedicated cluster.	i-bp****
GdnInstanceName	string	No	A reserved parameter. You do not need to specify this parameter.	test
TddlBizType	string	No	A reserved parameter. You do not need to specify this parameter.	test
TddlRegionConfig	string	No	A reserved parameter. You do not need to specify this parameter.	test
InstructionSetArch	string	No	A reserved parameter. You do not need to specify this parameter.	test
UsedTime	string	No	The subscription duration. Valid values: If Period is set to Year, the valid values of UsedTime are 1 to 5. If Period is set to Month, the valid values of UsedTime are 1 to 9. Note This parameter is required when PayType is set to Prepaid.	1
Period	string	No	The subscription type of the instance. Valid values: Year: yearly subscription Month: monthly subscription	Month
AutoRenew	string	No	Specifies whether to enable auto-renewal. This parameter is required only for subscription instances. Valid values: true: enables auto-renewal. false: disables auto-renewal. Note If you purchase the instance on a monthly basis, the auto-renewal cycle is one month. If you purchase the instance on a yearly basis, the auto-renewal cycle is one year.	true
DeletionProtection	boolean	No	Specifies whether to enable the release protection feature for the instance. Valid values: true: enables release protection. false: disables release protection. (default) Note This feature is supported only when the billing method is set to pay-as-you-go.	true
Port	string	No	The port that is used when you create a read-only instance for an ApsaraDB RDS for MySQL primary instance. Valid values: 1000 to 65534.	3306
BurstingEnabled	boolean	No	A deprecated parameter. You do not need to specify this parameter.	0
IsAnalyticReadOnlyIns	boolean	No	Specifies whether to enable the I/O burst feature for a Premium ESSD. Valid values: true: enables the I/O burst feature. false: disables the I/O burst feature.	false
AutoPay	boolean	No	Specifies whether to create a DuckDB-based analytical instance. Valid values: true: creates a DuckDB-based analytical instance. false: does not create a DuckDB-based analytical instance. Note Only ApsaraDB RDS for MySQL and ApsaraDB RDS for PostgreSQL support DuckDB-based analytical instances.	false
AutoCreateProxy	boolean	No	Specifies whether to enable automatic payment. Valid values: true: enables automatic payment. Make sure that your account balance is sufficient. false: generates an order without charging your account. Note Default value: true. If your payment method has an insufficient balance, set AutoPay to false. In this case, an unpaid order is generated. You can log on to the ApsaraDB RDS console to complete the payment.	false
IoAccelerationEnabled	string	No	Specifies whether to automatically create a database proxy. Valid values: true: automatically creates a general-purpose database proxy. false: does not automatically create a database proxy.	false
AutoUseCoupon	boolean	No	Specifies whether to enable the Buffer Pool Extension (BPE) feature for a Premium ESSD. Valid values: 1: enables the BPE feature. 0: does not enable the BPE feature.	0
PromotionCode	string	No	Specifies whether to use coupons. Valid values: true: uses coupons. false (default): does not use coupons.	true
CustomExtraInfo	string	No	The coupon code.	71744626****
		No	A reserved parameter. You do not need to specify this parameter.	None

Response elements

Element	Type	Description	Example
	object	The response parameters.
ConnectionString	string	The internal database connection address of the read-only instance.	rr-****.mysql.rds.aliyuncs.com
DBInstanceId	string	The read-only instance ID.	rr-uf6wjk5****
OrderId	string	The order ID.	10078937****
Port	string	The internal database connection port of the read-only instance.	3306
RequestId	string	The request ID.	1E43AAE0-BEE8-43DA-860D-EAF2AA0724DC

Examples

Success response

JSON format

{
  "ConnectionString": "rr-****.mysql.rds.aliyuncs.com",
  "DBInstanceId": "rr-uf6wjk5****",
  "OrderId": "10078937****",
  "Port": "3306",
  "RequestId": "1E43AAE0-BEE8-43DA-860D-EAF2AA0724DC"
}

Error codes

HTTP status code	Error code	Error message	Description
400	InvalidEngineVersion.Malformed	The specified parameter EngineVersion is not valid.
400	InvalidNetworkTypeClassicWhenCloudStorage	The Specified InstanceNetworkType value Classic is not valid when choose cloud storage type.	When selecting a cloud storage type, specifying a InstanceNetworkType value of Classic is not valid.
400	InvalidSecurityIPList.Malformed	The specified parameter SecurityIPList is not valid.
400	InvalidSecurityIPList.Duplicate	The Security IP address is not in the available range or occupied.	The IP address is invalid. Specify a valid IP address.
400	InvalidParameter	The specified parameter dbInstanceId is not valid.
400	OperationDenied	VPC IP is in use, please check.	The operation failed. The VPC IP address has been used.
400	InvalidZoneId.NotSupported	The Specified vpc Zone not supported.	VPC-hosted RDS instances cannot be created in the zone. Specify a different zone.
400	InvalidAvZone.NotSupport	Specified availableArea multiZone does not support in RDS.	The specified availableArea multiZone is not supported in ApsaraDB RDS.
400	CDDC.AvailableHostsNotEnoughInZone	Not enough available hosts are in the target zone.	The destination zone does not have sufficient host resources. Create a host in the zone.
400	InvalidReadEngineVersionPattern	The engine versions of the primary instance and the read-only instance do not match.	The engineVersion of the primary instance does not match that of the read-only instance.
400	InvalidDBInstanceClass.Offline	The specified instance type is no longer provided. Please specify another instance type.	The instance type that you select is no longer available. Select another instance type.
400	SYSTEM.CONCURRENT_OPERATE	Concurrent operation is detected.	Concurrent operations are run in the system.
400	Price.PricingPlanResultNotFound	Pricing plan price result not found.	Pricing plan price result not found.
400	InvalidDBInstanceName.Duplicate	Specified DB instance name already exists in the Aliyun RDS.	The operation failed. The instance name already exists. Specify a different name and try again.
400	InvalidInstanceLevel.DiskType	Specified instance level not support request disk type	The current instance type does not support the specified storage type.
400	InvalidRequestId	The request is copy, check your token.	The request is copy, check your token.
400	InvalidParam.InstanceNetworkType	Creation of classic network instances is not supported.	Classic network offline, does not support the creation of classic network instances!
400	Order.ComboInstanceNotAllowOperate	A package instance is not allowed to operate independently.	A package instance is not allowed to operate independently.
400	Order.NoRealNameAuthentication	You have not passed the real-name authentication and do not meet the purchase conditions. Please log in to the user center for real-name authentication.	You have not passed the real-name authentication and do not meet the purchase conditions. Please log in to the cost and cost for real-name authentication.
400	InsufficientAvailableQuota	Your account quota limit is less than 0, please recharge before trying to purchase.	Your account available limit is less than 0, please recharge before trying to purchase.
400	CommodityServiceCalling.Exception	Failed to call commodity service.	Failed to call commodity service return.
400	RegionDissolvedEOM	Dear customer, Alibaba Cloud plans to optimize and adjust the current region. Cloud services in this region will cease operations. You are currently unable to operate new purchase orders. Thank you for your understanding and support.	Hello, Alibaba Cloud plans to optimize and adjust the current region. Cloud services in this region will stop operating. In order to ensure your business continuity and smooth transition of data migration, you are currently unable to operate new purchase orders. Thank you for your understanding and support.
400	Commodity.InvalidComponent	The module you purchased is not legal, please buy it again.	The module you purchased is not legal, please buy it again.
400	RegionEndTimeDissolvedAustralia	Cloud services in the Australia (Sydney) region will be discontinued. Set the validity date to September 30, 2024 or earlier than September 30, 2024.	Hello customer, this area has been abolished.
400	Price.CommoditySys	Commodity system call exception.	Commodity system call exception.
400	Pay.InsufficientBalance	Insufficient available balance.	Insufficient available balance.
400	Order.PeriodInvalid	There is a problem with the period you selected, please choose again.	There is a problem with the period you selected, please choose again.
400	pay.noCreditCard	Account not bound to credit card.	The account is not bound to a credit card.
400	Order.InstHasUnpaidOrder	There is an unpaid order for the service you have purchased. Please pay or void it before placing the order.	There is an unpaid order for the service you have purchased. Please pay or void it before placing the order.
400	noAvailablePaymentMethod	No payment method is specified for your account. We recommend that you add a payment method.	No payment method has been specified for your account. We recommend that you add a payment method.
400	BasicInfoUncompleted	Your information is incomplete. Complete your information before the operation.	Your basic information is not complete, please complete your basic information before operation.
400	Risk.RiskControlRejection	Your account is abnormal, please contact customer service for details.	Your account is abnormal, please contact customer service for details.
400	Api.NotSupport	Specified api is not supported.	The current interface does not support.
400	ContainForbiddenLabelError	There is a label that prohibits placing orders. Please contact your distributor for assistance.	You cannot place the order because a tag indicates that order placement is prohibited. Contact your distributor.
400	InvalidDBInstanceId.NotFound	The DBInstanceId provided does not exist in records.	The DBInstanceId provided does not exist.
400	InvalidParam	Sepcified wal level Parameter is invalid. There are still logical slots in instance, so it can not be set as replica.	The specified wal_level parameter is invalid. There is still a copy slot in the instance, so it cannot be set to replica.
400	KmsApiError	User secret key invalid.	The user key is invalid.
400	System.SaleValidateFailed	Sales expression validation system error.	A system error occurs when the sales expression is verified.
400	Abs.InvalidAccount.NotFound	account is not found.	The account does not exist.
400	SqlExecuteFailedOrTimeout	sql command execution failed or timed out:%s.	SQL command execution failed or timed out
400	ColdData.EngineVersionNotSupport	The current instance engine version not support coldDataEnabled.	The current instance engine version not support coldDataEnabled.
400	ColdData.MinorVersionNotSupport	The current instance minor version not support coldDataEnabled.	The current instance minor version not support coldDataEnabled.
400	IncorrectTargetClasscode	The current instance type does not support this operation.	This operation is not supported by the instance type.
400	InvalidConnectionString.Duplicate	Specified connection string already exists in the RDS.	The link address name is duplicate. Please reset the connection string.
400	RequiredParam.NotFound	Required input param is not found.	A required parameter is missing.
400	Parameters.Invalid	Parameter error, please check the parameters.	Parameter error, please check the parameters.
400	BackupPolicyNotSupport	Cold Data won't open with CrossBackup or Flash Backup, please check Backup Policy.	Cold Data won't open with CrossBackup or Flash Backup, please check Backup Policy.
400	InvalideStatus.Format	The instance status does not support this operation.	The instance status does not support this operation.
400	InvalidReleasedKeepPolicy.Format	Specified Released Keep Policy is not valid.	Specified Released Keep Policy is not valid.
400	InvalidDBInstanceEngineType.Format	the DB instance engine type does not support this operation.	This operation is not supported for the database engine of the instance.
400	Pay.NoCreditCard	No credit cards.	No credit cards.
400	VpcNetworkTypeNotSupport	The vpc network type instance does not support this operation.	The vpc network type instance does not support this operation.
400	MirrorInsExists	Specified DB instance mirror ins already existed.	Specified DB instance mirror ins already existed.
400	UnsupportedClassCode	The specified DB instance class stops selling.	The specified DB instance class stops selling.
400	InvalidBackupSet	The specified database does not exist in the backup set.	The specified database does not exist in the backup set.
400	OrdTCommodityQueryError	Failed to query for product.	Failed to query product.
400	ProductInstanceReleased	The instance has been released. Please check before placing the order.	The instance has been released, please verify and place an order.
400	RegionEndTimeDissolvedIndia	The region is no longer supported.	The region is no longer supported.
400	InvalidVSwitchId.Format	The specified vswitch Id format is incorrect.	The specified vSwitch ID format is invalid.
400	InvalidParameterValue.NotStandard	Invalid parameter format.	The value of the parameter is invalid.
400	AtLeastThreeVSwitchAvailableIp	The primary vswitch requires at least three available IP addresses.	The master switch requires at least 3 available IPs.
400	AtLeastTwoVSwitchAvailableIp	The primary vswitch requires at least two available IP addresses.	The master switch requires at least 2 available IPs.
400	DuckDBOperationConflictBetweenPrimaryAndReadOnlyInstance	Current instance is already attached to another duckdb instance, operation is conflict.	The current instance is already associated with another DUCKDB instance, which conflicts with the current DUCKDB operation.
500	CannotDecreaseEssdPerfLevel	cannot decrease cloud essd performance level.
500	InvalidEssdStorageSize	invalid cloud essd storage size.
500	ExternalFailure	The request processing has failed due to external service failure.	The request processing has failed due to external service failure.
500	RequestMetaDataFailed	The service request failed. Please try again later or contact service personnel.	The service request failed. Please try again later or contact service personnel.
500	InvokeProxyFailure	The request processing has failed due to service failure of rds api.	The request failed to be processed due to an RDS API failure.
403	OperationDenied.PrimaryDBInstanceStatus	The operation is not permitted due to status of primary instance.	The operation failed. The RDS instance is deployed in a dedicated cluster and is not running.
403	InvalidReadStorageTypePattern	The storage type of the primary instance and the read-only instance do not match.
403	IncorrectCharacterType	Current DB instance character type does not support this operation.	This operation is not supported for the character type of the instance.
403	InvalidMultiparamZoneInfoList	Zoneinfo list is invaild.	The current primary zone is not aligned. The primary instance cannot be migrated.
403	OrderStatus.UnPaid	The specified db instance has unpaid order.	The instance has an unpaid order. Please pay first and try again.
403	InvalidReduceDiskSize	The storage capacity after the scale-down must be larger than the used amount.	The scale-in target capacity cannot be less than the current storage space usage
403	CloudSSDNotSupport	Cloud ssd does not support this operation, please upgrade to essd.	SSD cloud disks do not support this operation. Upgrade to ESSD.
403	InvalidUserOperatorPermission	The user permission does not support this operation.	The user is not authorized to perform this operation.
403	InvalidVswitchId	Specified conn vswitch id is not valid.	The specified VSwitchId is in an invalid format or is empty.
403	IncorrectMinorVersion	Current engine minor version does not support operations.	This operation is not supported for the current minor engine version.
403	OperationDenied.ZoneResource	There is no available zone for inventory.	There is no available zone for inventory.
403	NotInFlowController	Sorry,no permission.	Sorry,no permission.
403	InvalidKmsKey	Kms key is disabled.	The KMS key is disabled.
403	InvalidInstanceLevel.Malformed	Current DB instance level does not support this operation.	The specified database instance type does not support this operation.
403	BasicCategoryNotSupport	The Basic category is not supported.	Basic series not supported
403	GuardDBInstanceNotSupport	Guard instance does not support this operation.	This operation is not supported for disaster recovery instances.
404	IncorrectDBInstanceConnType	Current DB instance conn type does not support this operation.
404	InvalidDBInstance.NotFound	The specified instance does not exist or is not supported.	The RDS instance cannot be found. Check the ID or name of the RDS instance.
404	InvalidClusterKms	The current instance does not authorized to access the Key Management Service.	The instance does not have permissions to access Key Management Service (KMS).
404	Request.NotFound	The requested resource is not available.	The requested resources are unavailable.
404	HostInfo.NotFound	The specified host info is not found.	The specified host information does not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.

ApsaraDB RDS:CreateReadOnlyDBInstance