Create an ECS instance by using a custom or shared image - Elastic Compute Service

This topic describes how to use a created or imported custom image, image copy, or shared image to quickly create Elastic Compute Service (ECS) instances that have the same operating system, applications, and data. This helps improve the O&M efficiency of your business in the cloud.

Prerequisite

A custom image exists in the account and region in which you want to create an instance.

If no custom images exist in the account or region in which you want to create an instance, perform the operations that are described in the following table based on your business scenarios.

Scenario	Operation
You have an image on an on-premises device.	Import the on-premises image to Alibaba Cloud as a custom image. For more information, see Import an image.
You have a custom image in another region.	Copy the custom image to the region in which you want to create an instance. For more information, see Copy a custom image.
You have a custom image in another account.	Share the custom image with the account that you want to use to create an instance. For more information, see Share a custom image.
You have an instance or snapshot from which you can create a custom image.	Create a custom image from an instance Create a custom image from a snapshot

Procedure

Log on to the ECS console.
In the left-side navigation pane, choose Instances & Images > Images.
In the top navigation bar, select the region and resource group to which the resource belongs.
On the Custom Images or Shared Images tab, find the image that you want to use and click Create Instance in the Actions column.
The region and the image are automatically specified. Configure other parameters, such as Billing Method, Instance Type, and System Disk, based on your business requirements.
For more information, see the "Parameters" section of the Create an instance on the Custom Launch tab topic.

What to do next

If you add new data disks when you create the instance, you must initialize the data disks before you can use them. For more information, see Initialize a data disk.
If the custom image that you selected contains one or more data disk snapshots, the same number of data disks are automatically created from the data disk snapshots. After you create an ECS instance, you must log on to the instance to mount the data disks. Then, you can use the data disks without the need to initialize them. For more information, see Overview.