Help Center/ Huawei Cloud Flexus_Huawei Cloud Flexus RDS/ User Guide/ Working with FlexusRDS for PostgreSQL/ Buying a FlexusRDS for PostgreSQL Instance
Updated on 2025-06-30 GMT+08:00
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Buying a FlexusRDS for PostgreSQL Instance

Scenarios

This section describes how to purchase a FlexusRDS for PostgreSQL instance on the FlexusRDS console.

FlexusRDS for PostgreSQL only supports the yearly/monthly billing mode. It allows you to tailor your compute resources and storage space to your business needs.

Prerequisites

Procedure

  1. Go to the FlexusRDS console.
  2. If this is your first time to create a DB instance on this console, click Buy.
  3. Configure the instance information and click Buy.

    Figure 1 Selecting an instance class
    Figure 2 Selecting the required duration
    Table 1 Basic information

    Parameter

    Description

    Region

    Region where your resources are located.

    NOTE:

    Products in different regions cannot communicate with each other through a private network. After a DB instance is created, the region cannot be changed. Therefore, exercise caution when selecting a region.

    DB Engine

    PostgreSQL 16, 15, 14, 13, and 12.

    Instance Class

    An instance class includes vCPUs, memory, storage, and DB instance type.

    • Storage: The purchased storage space. After a DB instance is purchased, you can configure storage autoscaling. The maximum allowed storage is 4,000 GB. For details, see Enabling Storage Autoscaling for a FlexusRDS for PostgreSQL Instance.
    • DB Instance Type
      • Primary/Standby: An HA architecture. When a primary instance is being created, a standby instance is provisioned along with it to provide data redundancy. The standby instance is invisible to you after being created.
      • Single: A single-node architecture. It is less expensive than a primary/standby DB pair.

    Network

    A Virtual Private Cloud (VPC) is a virtual network in which your instance is located. A VPC can isolate networks for different workloads.

    A subnet provides dedicated network resources that are logically isolated from other networks for security purposes.

    For details about how to create a VPC and subnet, see Creating a VPC and Subnet.

    DB Instance Name

    Must start with a letter and consist of 4 to 64 characters. Only letters (case-sensitive), digits, hyphens (-), underscores (_), and periods (.) are allowed.

    If you buy multiple DB instances at a time, their names will include a four-digit suffix. For example, if you specify instance here, the names will be instance-0001, instance-0002, and so on. If existing instances' suffixes have already reached up to 0010, the new instance names will start from instance-0011.

    Required Duration

    The system will automatically calculate the configuration fee based on the selected required duration. The longer the required duration is, the larger discount you will enjoy.

    Auto-renew
    • This option is not selected by default.
    • If you select this option, the auto-renew cycle is determined by the selected required duration.

    Quantity

    You can buy a maximum of 50 DB instances at a time. If you intend to create primary/standby DB instances and set Quantity to 1, a primary instance and a synchronous standby instance will be created.

  4. Confirm the order.

    Figure 3 Order confirmation
    • If you need to modify your settings, click Previous.
    • If you do not need to modify your settings, click Pay Now.

  5. Select a payment method and complete the payment.
  6. To view and manage your instance, go to the instance list page.

    • When your instance is being created, the status is Creating. The status changes to Available after the instance is created.
    • Automated backup is enabled by default during instance creation and cannot be disabled. An automated full backup is immediately triggered once your DB instance is created.
    • The default administrator account of your DB instance is root.
    • During instance creation, the system randomly sets a password for the administrator account. You need to reset the password before you can connect to the instance. For details, see Resetting the Administrator Password of a FlexusRDS for PostgreSQL Instance.
    • The default database port is 5432 and cannot be changed.