You can create an ECS instance on a specified DDH, but only VPC-Connected ECS instances are supported.


Before you create an ECS instance on a specified DDH, complete the following:

Background information

You can create an ECS instance on a specified DDH. Only VPC-Connected ECS instances are supported. The functional differences between the ECS instance on a DDH and that on a shared cloud hosting server, see comparing ECS features on different hosts.


  1. Log on to the ECS Console.
  2. In the left-side navigation pane, click Dedicated Hosts.
  3. Select a region.
  4. Select a DDH and click Create Instance to start creating an ECS instance on the DDH.
  5. Follow these steps to complete Basic Configurations:
    1. select a Dedicated Host: Use the selected DDH that is displayed by default. Alternatively, you can select another DDH.
    2. select a Billing Method: The billing method of an ECS instance is determined by the DDH.

      On a Subscription DDH, both Subscription and Pay-As-You-Go ECS instances are supported.

    3. Confirm Region: The region and zone of the ECS instance is determined by the selected DDH.
    4. Select an ECS instance type and specify the instance quantity. The eligible ECS instance type is determined by the selected type and available resources of the DDH. For more information, see dedicated host types.
    5. You can select a public image, custom image, shared image, or marketplace image.
    6. Select Storage:
      • System Disk: Required. A system disk is required for the image. Specify the cloud disk category and size for the system disk:
        • Cloud disk category: You can select any cloud disk category in the selected region.
        • Size: The default size range is [40, 500] GiB. If the selected image is greater than 40 GiB, the default size range is [ImageSize, 500] GiB. The available size range varies according to the selected image, as shown in the following table.
          Operating System System disk capacity
          Linux (excluding CoreOS) FreeBSD [max{20, ImageSize}, 500] GiB
          CoreOS [max{30, ImageSize}, 500] GiB
          Windows [max{40, ImageSize}, 500] GiB
      • Data Disk: Optional. To add data disks now, specify the category, size, and quantity of data disks, and encrypt the disks or not. You can create an empty data disk or create a data disk from a snapshot. Up to 16 data disks can be added.
        Note The data disks added here have the following features:
        • The data disks added here have the same billing method with that of the instance.
        • A Subscription data disk is released along with the instance, and a Pay-As-You-Go data disk can be set to be released along with the instance.
      • If you have selected an instance type that has local disks, such as instance type of the i2 family, the local storage information is displayed. You cannot modify the quantity or category of local storage, which is determined by the selected instance type. For more information, see instance type families.
  6. Click Next: Networking to complete the networking and security group configuration:
    1. Select Network: Use the default VPC (Virtual Private Cloud). You must select a VPC and a VSwitch. If you do not have a VPC and a VSwitch, you can use the default ones.
    2. Configure the Internet bandwidth:
      • To assign a public IP address to the instance, select Assign public IP, select PayByTraffic and specify a bandwidth value. You cannot unbind the assigned public IP address from the instance. For more information about network billing, see billing of network bandwidth.
      • To use elastic public IP (EIP) address for Internet access, do not select Assign public IP.
    3. Select a security group: All the rules must meet your business operation needs.
      Note You can use the default security group and add rules by yourself. For more information, see default security group rules.
    4. Add an elastic network interface. If your selected instance type supports elastic network interfaces, you can add one and specify a VSwitch for it.
      Note By default, the elastic network interface is released along with the instance. You can use the ECS console or the DetachNetworkInterface interface to detach network interface from the instance
  7. Optional: Click Next: System Configurations to complete the following configurations:
    • Select and set Log on Credentials. You can set it now or select Set Later to set the credential after the instance is created. Select a credential based on the image:
      • Linux: You can select a password or SSH key pair as a logon credential.
      • Windows: You can only select a password as a logon credential.
    • Specify the instance name, which is displayed in the ECS console, and the host name, which is displayed inside the guest operating system.
    • Set Advanced configurations:
      • Instance RAM role: Assign a RAM role to the instance.
      • User-defined data: Customize the startup behaviors of an instance or pass data into an instance.
  8. Optional: Click Next: Grouping.

    If you have multiple instances, you can add tags to the instance to simplify future management.

  9. Confirm the order:
    • In the Configurations Selected area, confirm all the configurations. You can change configurations by clicking the Edit Configurations icon.
    • To create a Pay-As-You-Go instance, you can set Auto Release Schedule
    • To create a Subscription instance, you can specify the Purchase cycle and select Auto-Renew.
      Note The expiration time of a Subscription ECS instance cannot be later than that of the selected DDH.
    • Confirm Instance Cost. It is the sum of the cost of the system disk, the data disks (if any), and public traffic.
    • Read and confirm the ECS Service Terms and Product Terms of Service.
  10. Click Create Order.


After the instance is created, click ECS Console to go back to the ECS console to view the created ECS instance. In the Instance page, you can view the instance ID, the public IP address, and the private IP address of the new created instance. By setting the Set Display Items, you can view the Dedicated Host where the instance is hosted in the instance list.
Note For more information about Set Display Items, see migrate ECS instance across DDHs.

What to do next