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Elastic Compute Service

Getting started

Creating DDHs and deploying instances

This topic describes how to quickly create a DDH and deploy an instance on it in the console.

Prerequisites

The preparations are completed. For more information, see Preparations.

Procedure

tip

This topic only describes the required parameters and their values when you create resources. For parameters not mentioned, retain the default settings. To learn about all parameters, refer to Creating dedicated host (DDH) and Creating instances on DDH.

Step 1: Create a DDH

In the top menu bar, select the region where your business is located.

Click the "Create host" button to enter the DDH creation page, and configure the parameters as shown in the following table.

Parameter	Example	Description
Billing method	Subscription	Currently, only Subscription is supported.
Region and AZ	China (Beijing) A	Select a region closest to your service location.
Host specification	ecs.ddhr2s	For the DDH specifications provided by VolcanoEngine, refer to Specifications.
Hostname	DDH-1	Specify the name of the DDH.
CPU oversubscription ratio	4	This parameter is used to increase the available vCPUs of the DDH. The default value is 4. Available vCPUs of a DDH = Number of physical CPU cores * 2 * CPU oversubscription ratio
Automatic deployment	By default, "Allow automatic deployment" is not selected.	You can either configure the automatic deployment of the instance on the default DDH or manually specify a DDH for instance deployment. By default, automatic deployment is not allowed.
Quantity	1	Specify the number of DDHs to create. By default, 1 DDH is created.
Subscription duration	1 month	The default duration is 1 month.
Automatic renewal	By default, "Automatic renewal upon expiration" is not selected.	Retain the default setting. That is, do not enable automatic renewal.

Review and confirm the relevant agreement based on the console instructions, and then click the "Buy now" button to complete the purchase.

At this point, you obtain a memory oversubscribed ecs.ddhr2s DDH named DDH-1.

Step 2: Create an instance

On the DDH list page, click the "Create instance" button in the "Actions" column of the target host.

Complete the basic configuration of the instance as shown in the following table.

Parameter	Example	Description
Dedicated host	DDH-1	Specify DDH-1 created in Step 1 to deploy the instance.
Instance type	8 vCPUs, 16 GiB	Specify the vCPU and memory configuration of the instance type.
Image	CentOS 7.9	The image provides the operating system and required application data for the instance.

Click the "Next" button to go to the "Network and security" step, and complete the network and security configuration of the instance as shown in the following table.

Parameters	Example	Description
VPC	vpc-01	192.168.0.0/16
Subnet	subnet-01	192.168.1.0/24
Elastic IP (EIP)	Select Elastic IP (EIP)	Enable this feature to automatically assign an EIP to the instance upon creation, providing Internet access capability.

Click the "Next" button to go to the "Advanced configuration" step, and complete the advanced configuration of the instance as shown in the following table.

Parameter	Example	Description
Login credentials	Key Pair	The login credentials for the instance. Select the "Key pair" method for higher security.
Login name	root	This parameter is fixed as root.
Key pair	ECS-01	Click "Create key pair". Enter a key pair name and quickly create a key pair used for instance login.
Instance name	ECS-Instance-01	Specify the name of the instance.

Confirm the order information, review and confirm the relevant agreement based on the console instructions, and complete the purchase.

At this point, you will obtain an ecs.ddhr2s.define.c8m16 instance named ECS-Instance-01.

Subsequent operations

Viewing host where instance is located

Managing DDHs

Managing instances on DDHs

Last updated: 2026.01.16 19:04:00