Docs

RDS for PostgreSQL

Managing instances

Creating an instance

Creating an instance is the first step when using RDS for PostgreSQL. This topic describes how to create a database for PostgreSQL instance.

Prerequisites

A Volcano Engine account has been created and the real-name authentication has been completed. For account registration and real name authentication, refer to How to Register an Account and Real-name authentication.

VPC service access authorization has been completed. For the authorization method, refer to Cross-service access authorization.

Procedure

In the top menu bar, select the project and region for the instance.

tip

In subsequent steps, only the VPCs and subnets under the selected project can be selected.

In subsequent steps, the project to which the instance belongs can be reselected.

On the Instances page, click Create instance.

On the Create instance page, set the following instance parameters.

Parameter	Is it required?	Note
Instance name	No	Set the instance name. When empty, the instance ID is named. Naming rules are as follows: Cannot start with a digit or a hyphen (-). Can only contain Chinese characters, English letters, digits, underscores (_) and hyphens(-). Must be 1 to 128 characters in length.
Compatible version	Yes	Select the compatible version for the instance. You can choose PostgreSQL 11, PostgreSQL 12, PostgreSQL 13, PostgreSQL 14, PostgreSQL 15, PostgreSQL 16, PostgreSQL 17, or PostgreSQL 18. warning If you need to enable TDE encryption, only PostgreSQL 17 is supported.
Instance types	Yes	High-availability version: the classic high-availability architecture that contains one primary node and one secondary node.
Availability zone	Yes	The region and AZ of the instance, that is, the geographical location of the instance.Availability zone tip The instance region and AZ cannot be changed after the instance purchase. Select a nearby region based on the geographical location of your target users to speed up users' access. Make sure that the PostgreSQL instance is in the same region as the ECS instance to connect to. Otherwise, they cannot be connected through the private network, and can only be connected via Internet, which undermines their performance.
Node specification	Yes	Select the specification and AZ of the primary node, and select the specification of the read-only node. You can click "+" at the bottom left to add a read-only node. Parameter configuration rules: The specifications of the secondary and primary nodes must be consistent. The specification of a read-only node must be greater than or equal to that of the primary node. You can add up to 10 read-only nodes. Primary, secondary, and read-only nodes can be deployed in different availability zones within the same region.
Storage type	Yes	Local SSD disk is supported, and the SSD must be in the same node as the database engine. Storing data in the local SSD disk can reduce I/O delay.
Storage space	Yes	Select the storage space for the instance. Storage space includes data space, log space, WAL log space, and transaction file space. The storage space ranges from 20 to 12,000 GB. Select reasonably based on business needs. tip Different specifications have different storage space value ranges. For detailed information on storage space value ranges, refer to Product specifications. Storage space above 3000 GB is currently an allowlisted feature, available only in the China (Beijing), China (Shanghai), and China (Guangzhou) regions. If you need to use this feature, submit a ticket to contact us. Supports automatic expansion of storage space. For specific operations, refer to storage space expansion management. If you enabled automatic storage expansion rules for your instance and later obtained authorization for a larger storage capacity, manually adjust the expansion limit. Otherwise, the rule will cap capacity at 3000 GB and fail to expand to your authorized storage size.
Virtual private cloud	Yes	Select the VPC used by the instance. tip Virtual Private Cloud (VPC), is an isolated network environment with higher security and performance than traditional classical networks. You can create a new private network by clicking Create VPC on the right. For more details, see Creating a VPC. Only the virtual private cloud under the project specified in the navigation bar is supported for selection.
Subnet	Yes	Select the subnets available to the instance in the VPC. tip A subnet is a CIDR block in the VPC. All cloud resources in the VPC must be deployed in subnets, which assign VPC IP addresses to the cloud resources. You can create a new subnet by clicking Create subnet on the right. For more details, see Creating a subnet. Only subnets in the availability zone where the instance is located can be selected. Subnets and virtual private clouds can belong to different projects, but RDS for PostgreSQL instances can only use subnets and virtual private clouds under the same project. Notice that the target subnet and the selected virtual private cloud belong to the same project. You can verify this in the Project console.
Allowlists	No	Click the allowlist text box to go to the Associate allowlist page. Under this page, after checking the allowlist, click OK and go back to Create instance page. The selected allowlist will be displayed in the allowlist text box. tip On the Associate allowlist page, you can also create a new allowlist. For more information about creating an allowlist, see Creating an allowlist. An instance can associate up to 100 allowlists. Click the × after the allowlist to remove the allowlist. If there is a default allowlist set under the current account, the allowlist will appear in the allowlist text box.
Maintenance window	No	Confirm the maintenance window for the instance. To modify, click the edit button to enter the maintenance window, set Maintainable day and Maintenance window, then click OK. tip At least one day and up to seven days per week can be set as maintainable days. The maintenance window can only be set from 00:00 to 05:59 (UTC+08:00). The minimum duration of the maintenance window is 2 hours and the maximum duration is 6 hours. Cross-day settings are not allowed. After an instance is created, you can modify the maintenance window of the instance again. For details, refer to Configuring maintenance window.
Data encryption	No	Whether to enable the TDE encryption feature. It is disabled by default. After enabling, select the keyring and key in the pop-up Enable transparent data encryption (TDE) function dialog box. warning TDE encryption is currently in invitation-only testing. To use it, submit a ticket. TDE encryption cannot be disabled once enabled.
Affiliated project	Yes	Select the project to which the instance belongs. tip A project is a virtual concept that includes a set of resources, users, and roles. A project allows you to view and manage a group of resources in a unified manner and control the permissions of users and roles to these resources. For more details, refer to Resource management. RDS for PostgreSQL will assign the newly created instance to the "default" project by default. You can adjust the instance's project during or after the creation process.
Tag	No	Add tag(s) to the instance. Tags are used for the identification and classification of cloud resources. RDS for PostgreSQL supports adding tags to instances. You can classify PostgreSQL instances by tags to facilitate instance search and resource aggregation. For more information, see Tag overview. tip If you need to separate accounts by tags, you need to enable tags in Bill management > Bill tags to apply corresponding tags to bill details. For more details, see Tag-based bill splitting for instances.
Billing method	Yes	RDS for PostgreSQL supports two billing methods: pay-as-you-go and subscription. Pay-as-you-go: If you plan to use your PostgreSQL instance for a short period of time, choose pay-as-you-go (hourly rate). You can save money by releasing the instance when you no longer need it. Subscription: If you plan to use your PostgreSQL instance for a long period of time, select Subscription (one-time payment) and choose the duration of the purchase in the lower left corner of the page. Subscription is more affordable than pay-as-you-go, and the longer you buy, the more discounts you get. tip You can also create a pay-as-you-go instance first and confirm that the instance meets the requirements before switching to a yearly/monthly subscription. If you choose pay-as-you-go billing, make sure your Volcano Engine account balance is at least 100 CNY. For more information on billing, see Billing overview.
Subscription duration	No	If the billing method is Subscription, select the subscription duration. Support monthly purchase (can purchase 1~9 months) and yearly purchase (can purchase 1~3 years).
Automatic renewal	No	If you select the billing method as Subscription, you can check the option for Automatic renewal. After checking, the platform will automatically renew the instance monthly before expiration without manual renewal. You can also modify the renewal configuration. For more information, refer to Renewal management.
Quantity	No	Choose the number of instances. Up to 20 instances can be created at once. tip Each Volcano Engine account can purchase up to 50 instances in each region by default. To increase the quota, apply in Quota Center.

Click Confirm order.

Complete the next steps based on the selected billing method.

If you select Pay-as-you-go: On the Confirm order page, confirm the order details. Read and check the Database Product and Services Terms, and click Buy now to create a new instance.

If you select Subscription:

On the Confirm order page, confirm the order details. Read and check the Database Product and Services Terms, and click Submit the order.

On the Confirm order information page, confirm the order information again and click Next step.

On the Submit payment information page, confirm the payment details and select the payment method. Click Go to pay, and create a new instance after completing the payment according to the prompts.

Procedure

In the top menu bar, select the project and region for the instance.

tip

In subsequent steps, only the VPCs and subnets under the selected project can be selected.

In subsequent steps, the project to which the instance belongs can be reselected.

On the Instances page, click Create instance.

On the Create instance page, set the following instance parameters.

Parameter	Is it required?	Note
Instance name	No	Set the instance name. When empty, the instance ID is named. Naming rules are as follows: Cannot start with a digit or a hyphen (-). Can only contain Chinese characters, English letters, digits, underscores (_) and hyphens(-). Must be 1 to 128 characters in length.
Compatible version	Yes	Select the compatible version for the instance. You can choose PostgreSQL 11, PostgreSQL 12, PostgreSQL 13, PostgreSQL 14, PostgreSQL 15, PostgreSQL 16, PostgreSQL 17, or PostgreSQL 18. warning If you need to enable TDE encryption, only PostgreSQL 17 is supported.
Instance types	Yes	High-availability version: the classic high-availability architecture that contains one primary node and one secondary node.
Availability zone	Yes	The region and AZ of the instance, that is, the geographical location of the instance.Availability zone tip The instance region and AZ cannot be changed after the instance purchase. Select a nearby region based on the geographical location of your target users to speed up users' access. Make sure that the PostgreSQL instance is in the same region as the ECS instance to connect to. Otherwise, they cannot be connected through the private network, and can only be connected via Internet, which undermines their performance.
Node specification	Yes	Select the specification and AZ of the primary node, and select the specification of the read-only node. You can click "+" at the bottom left to add a read-only node. Parameter configuration rules: The specifications of the secondary and primary nodes must be consistent. The specification of a read-only node must be greater than or equal to that of the primary node. You can add up to 10 read-only nodes. Primary, secondary, and read-only nodes can be deployed in different availability zones within the same region.
Storage type	Yes	Local SSD disk is supported, and the SSD must be in the same node as the database engine. Storing data in the local SSD disk can reduce I/O delay.
Storage space	Yes	Select the storage space for the instance. Storage space includes data space, log space, WAL log space, and transaction file space. The storage space ranges from 20 to 12,000 GB. Select reasonably based on business needs. tip Different specifications have different storage space value ranges. For detailed information on storage space value ranges, refer to Product specifications. Storage space above 3000 GB is currently an allowlisted feature, available only in the China (Beijing), China (Shanghai), and China (Guangzhou) regions. If you need to use this feature, submit a ticket to contact us. Supports automatic expansion of storage space. For specific operations, refer to storage space expansion management. If you enabled automatic storage expansion rules for your instance and later obtained authorization for a larger storage capacity, manually adjust the expansion limit. Otherwise, the rule will cap capacity at 3000 GB and fail to expand to your authorized storage size.
Virtual private cloud	Yes	Select the VPC used by the instance. tip Virtual Private Cloud (VPC), is an isolated network environment with higher security and performance than traditional classical networks. You can create a new private network by clicking Create VPC on the right. For more details, see Creating a VPC. Only the virtual private cloud under the project specified in the navigation bar is supported for selection.
Subnet	Yes	Select the subnets available to the instance in the VPC. tip A subnet is a CIDR block in the VPC. All cloud resources in the VPC must be deployed in subnets, which assign VPC IP addresses to the cloud resources. You can create a new subnet by clicking Create subnet on the right. For more details, see Creating a subnet. Only subnets in the availability zone where the instance is located can be selected. Subnets and virtual private clouds can belong to different projects, but RDS for PostgreSQL instances can only use subnets and virtual private clouds under the same project. Notice that the target subnet and the selected virtual private cloud belong to the same project. You can verify this in the Project console.
Allowlists	No	Click the allowlist text box to go to the Associate allowlist page. Under this page, after checking the allowlist, click OK and go back to Create instance page. The selected allowlist will be displayed in the allowlist text box. tip On the Associate allowlist page, you can also create a new allowlist. For more information about creating an allowlist, see Creating an allowlist. An instance can associate up to 100 allowlists. Click the × after the allowlist to remove the allowlist. If there is a default allowlist set under the current account, the allowlist will appear in the allowlist text box.
Maintenance window	No	Confirm the maintenance window for the instance. To modify, click the edit button to enter the maintenance window, set Maintainable day and Maintenance window, then click OK. tip At least one day and up to seven days per week can be set as maintainable days. The maintenance window can only be set from 00:00 to 05:59 (UTC+08:00). The minimum duration of the maintenance window is 2 hours and the maximum duration is 6 hours. Cross-day settings are not allowed. After an instance is created, you can modify the maintenance window of the instance again. For details, refer to Configuring maintenance window.
Data encryption	No	Whether to enable the TDE encryption feature. It is disabled by default. After enabling, select the keyring and key in the pop-up Enable transparent data encryption (TDE) function dialog box. warning TDE encryption is currently in invitation-only testing. To use it, submit a ticket. TDE encryption cannot be disabled once enabled.
Affiliated project	Yes	Select the project to which the instance belongs. tip A project is a virtual concept that includes a set of resources, users, and roles. A project allows you to view and manage a group of resources in a unified manner and control the permissions of users and roles to these resources. For more details, refer to Resource management. RDS for PostgreSQL will assign the newly created instance to the "default" project by default. You can adjust the instance's project during or after the creation process.
Tag	No	Add tag(s) to the instance. Tags are used for the identification and classification of cloud resources. RDS for PostgreSQL supports adding tags to instances. You can classify PostgreSQL instances by tags to facilitate instance search and resource aggregation. For more information, see Tag overview. tip If you need to separate accounts by tags, you need to enable tags in Bill management > Bill tags to apply corresponding tags to bill details. For more details, see Tag-based bill splitting for instances.
Billing method	Yes	RDS for PostgreSQL supports two billing methods: pay-as-you-go and subscription. Pay-as-you-go: If you plan to use your PostgreSQL instance for a short period of time, choose pay-as-you-go (hourly rate). You can save money by releasing the instance when you no longer need it. Subscription: If you plan to use your PostgreSQL instance for a long period of time, select Subscription (one-time payment) and choose the duration of the purchase in the lower left corner of the page. Subscription is more affordable than pay-as-you-go, and the longer you buy, the more discounts you get. tip You can also create a pay-as-you-go instance first and confirm that the instance meets the requirements before switching to a yearly/monthly subscription. If you choose pay-as-you-go billing, make sure your Volcano Engine account balance is at least 100 CNY. For more information on billing, see Billing overview.
Subscription duration	No	If the billing method is Subscription, select the subscription duration. Support monthly purchase (can purchase 1~9 months) and yearly purchase (can purchase 1~3 years).
Automatic renewal	No	If you select the billing method as Subscription, you can check the option for Automatic renewal. After checking, the platform will automatically renew the instance monthly before expiration without manual renewal. You can also modify the renewal configuration. For more information, refer to Renewal management.
Quantity	No	Choose the number of instances. Up to 20 instances can be created at once. tip Each Volcano Engine account can purchase up to 50 instances in each region by default. To increase the quota, apply in Quota Center.

Click Confirm order.

Complete the next steps based on the selected billing method.

If you select Pay-as-you-go: On the Confirm order page, confirm the order details. Read and check the Database Product and Services Terms, and click Buy now to create a new instance.

If you select Subscription:

On the Confirm order page, confirm the order details. Read and check the Database Product and Services Terms, and click Submit the order.

On the Confirm order information page, confirm the order information again and click Next step.

On the Submit payment information page, confirm the payment details and select the payment method. Click Go to pay, and create a new instance after completing the payment according to the prompts.

Next steps

Viewing instance list

View instance details

Last updated: 2026.10.16 14:55:57