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Elastic Compute Service

Buying ECS instances

Quickly purchasing instances

This topic describes how to quickly purchase an ECS instance in the ECS console. With quick purchase, you do not need to manually enter or customize parameter configurations, which improves configuration efficiency and makes purchasing more convenient.

Usage notes

When you choose quick purchase, the system automatically configures certain parameters to shorten the configuration time. See detailed parameters in the following table.

Parameter	Default configuration
Availability zone	An availability zone randomly assigned by the system, which cannot be changed.
VPC and subnet	VPC and subnet of the instance are configured by default. For details of the default VPC and its subnet CIDR block, refer to What is a Virtual Private Cloud (VPC).
Security group	The security group of the instance is configured by default. For detailed information, refer to Security group classification.
Volume	By default, system volume of 40 GiB ESSD is allocated, with no storage volume associated. After you create an instance through quick purchase, you can associate data volumes with the instance.

If you need to customize the parameters (such as instance type, network, login credentials), go to the custom purchase page. For detailed steps, refer to Purchasing an instance by following the wizard.

Procedure

In the left-side navigation pane, select "Instances & Images > Instances".

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

Select "Create instance > Quick purchase" to start quick purchase of an ECS instance.

On the purchase page, refer to the table below to complete the configuration.

Parameter	Description	Sample value
Billing method	Pay-as-you-go: This is a postpaid mode, charged hourly based on actual usage duration. It allows you to create or delete instances at any time. Subscription: You need to prepay the subscription fee based on the subscription duration term.	Subscription
Region	Supported regions for this quick purchase feature include: China (Shanghai) China (Beijing) Description Private networks in different regions are completely isolated. It is recommended to choose a region closer to your business, which can reduce network latency and improve access speed. After creating an instance, you cannot change its region and availability zone.	China (Beijing)
Instance type	Instance types are provided as packages, including "Basic entry", "Web application", "Game", "Audio & video", and "Database". Under each instance type, detailed information about vCPU, memory, and system volume is displayed.	Entry-level configuration
Operating systems	Supported public images include: CentOS Ubuntu Windows veLinux tip You can enable the security enhancement feature to reduce host intrusion risks and safeguard your host security.	CentOS 7.9
Network configuration	By default, the system automatically assigns a VPC, subnet, and security group for quick purchase of an instance. This builds a virtual network environment for cloud resources where private networks are isolated from each other.	Virtual Private Cloud
EIP	When you create an ECS instance, an EIP is automatically assigned by default for quick purchase. This enables the instance to access the Internet. The default configuration of the EIP is as follows: ISP: (Default) BGP (Multi-ISP). Billing method: Pay-by-data-transfer (default) Pay-by-bandwidth. Maximum bandwidth: The maximum bandwidth of the EIP, in Mbps. After creating the instance, you can change the maximum bandwidth of EIP at any time. For the specific range, refer to Performance limits.	Select Elastic IP (EIP)
Login password	Manually set the login password for the instance. We recommend specifying a complex password to improve security. If you need to use a key pair that can provide greater security for login, go to custom purchase page of instance.	-
Purchase time	For a subscription instance, select its subscription duration on the right.	1 month
Quantity	Confirm the quantity of instances. You can purchase a maximum of 30 instances through quick purchase in one order.	1
Automatic renewal	Set whether to "Enable automatic renewal" for instance. After you enable automatic renewal, the platform automatically deducts the renewal expenses before the expiration of the instance. You don't need to manually renew it.	-

Follow the console guidance to review and confirm the relevant agreements.

Click the "Buy now" button to complete the purchase. Coupons can be used for deduction.

Click "Go to the console" to navigate to the Instances page to view the specifications of the newly created instance.

Subsequent operations

After purchasing an instance, you can follow the Subsequent operations to learn and use ECS instances.

FAQs

How do I configure a domain name? What conditions must be met for domain name filling?

How can I view the regions and availability zones where instances are available for sale?

What should I do when "Sold out" appears when I purchase an instance of a particular specification?

Can I buy ECS instances if my account does not undergo real-name authentication?

How long does it take to use an ECS instance after I purchase one?

For more questions about purchasing instances, refer to FAQs on purchasing instances.

Last updated: 2026.06.18 16:22:23