Elastic Compute Service:Create a custom image from a snapshot

Considerations

Before you create custom images from snapshots, take note of the items described in the following table.

Procedure

This section describes how to create a custom image from a system disk snapshot on the Snapshots page. To create a custom image from a system disk snapshot, you can also go to the Images page by choosing Instances & Images > Images in the left-side navigation pane, or go to the Snapshots tab of the instance details page from the Instance page after choosing Instances & Images > Instances in the left-side navigation pane.

1. Log on to the ECS console.

2. In the left-side navigation pane, choose Storage & Snapshots > Snapshots.

3. In the top navigation bar, select the region and resource group to which the resource belongs.

4. On the Disk Snapshots tab, find a snapshot whose Disk Type is System Disk and click Create Custom Image in the Actions column.

5. In the Create Custom Image dialog box, configure the parameters that are described in the following table.

   Parameter	Description	References
   Image Name	Enter a name for the custom image.	N/A
   Image Check	Optional. The image check feature checks whether imported custom images are valid and whether the images can be used to create full-featured ECS instances. By default, Check After Creation is selected, and the image check feature checks the custom image immediately after the image is created. After the image check is completed, you can view the check result in the Check Result column corresponding to the image on the Custom Images tab. If you need to repair an item, you can use the ACS-ECS-RepairImage public template of CloudOps Orchestration Service (OOS) or manually repair the item based on the solutions in the check result. Note Only specific operating systems support the image check feature. For information about the operating systems that do not support the image check feature, see Operating system limits for image check.	Overview
   Image Family	Optional. Select an image family. Custom images that belong to an image family can be deprecated or restored to allow seamless image updates and rollbacks.	Overview
   Snapshot Settings	Optional. Select increaseData Disk, click increases, and then select the ID of a data disk snapshot. After data disk snapshots are added, the custom image created from the snapshots contains the same number of data disks as the snapshots. If you do not select the ID of a data disk snapshot, an empty data disk is created. The default size of the data disk is 5 GiB. If you select the ID of a data disk snapshot, a data disk that has the same size as the data disk snapshot is created from the snapshot.	Create a disk from a snapshot
   Billing of Snapshots	If you specified a retention period for the snapshot, you must select I have read the Billing of Snapshots. To ensure that the snapshot can be automatically released, delete the images that are associated with the snapshot before the snapshot expires. Otherwise, the snapshot cannot be released and continues to generate fees.	Create a snapshot
   Image Description	Optional. Enter a description for the custom image.	N/A
   Tag	Optional. Select a tag. The Tag parameter is optional in most cases. The Tag parameter is required when you log on as a Resource Access Management (RAM) user and a policy attached to the RAM user requires that tags be added. In this case, if you do not specify the Tag parameter, an error is reported indicating insufficient permissions.	Tags
   Resource Group	Optional. Select a resource group to manage the custom image based on the usage and permissions.	Resource groups

6. In the message that appears, click OK.

   The amount of time required to create an image varies based on the sizes of disks. You must wait until the snapshot of each disk is created before you can use the image.