You can use shared images to create Elastic Compute Service (ECS) instances across multiple Alibaba Cloud accounts in the same region. After you create a custom image, you can share the custom image with other Alibaba Cloud accounts or within your organization based on resource directories or folders. The sharees can use the shared image to create identical ECS instances. This topic describes how to share a custom image and the considerations that you must take note of when you share the image.
ScenariosScenario 1: You want to share custom images in your Alibaba Cloud account with one or more Alibaba Cloud accounts.
Scenario 2: When you use Alibaba Cloud services, you use a resource directory to manage all Alibaba Cloud accounts of your organization. You want to share the custom images of a member in the resource directory with all members in the resource directory or with all members in a specific folder in the resource directory.
If you share custom images in Scenario 2, all accounts in the resource directory or folder have access to the shared images. Accounts that are subsequently added to the resource directory or folder also have access to the shared images. Accounts that are removed from the resource directory or folder lose access to the shared images. For more information, see What is Resource Sharing?
NoteResource Directory is a service that you can use to manage relationships among a number of accounts and resources. Resource Directory allows you to quickly establish an organizational structure based on your business requirements and consolidate the accounts of your organization into the structure to create a hierarchy for the resources of your organization. For more information, see What is Resource Directory?
If you shared a custom image with all members in a resource directory or with all members in a specific folder in the resource directory, we recommend that you do not reshare the custom image in the manner described in Scenario 1. Otherwise, the shared image data may be inconsistent between resource directories.
Before you share a custom image, take note of the items described in the following table.
Item
Description
Fees
You are not charged for sharing custom images.
Regions
You can share custom images across accounts only within the same region.
If you want to share a custom image across regions, copy the image to the destination region and share the image copy. For more information, see Copy a custom image.
You can share encrypted custom images only within the same regions, such as the China (Beijing), China (Shanghai), China (Hong Kong), Singapore, and Indonesia (Jakarta) regions.
Limits
You can share custom images that are created in your account. You cannot share custom images that are created and shared by other accounts.
ECS imposes limits on the number of users with which you can share a custom image. In the Quota Center console, you can view and change the Quota of users that can be shared per custom image on the General Quotas page for ECS. For more information, see Manage ECS quotas.
Images cannot be shared between accounts on the China site and accounts on the international site.
You cannot share ECS custom images for use on simple application servers. You can share custom images created from simple application servers for use on ECS instances. For more information, see Share an image to ECS.
You cannot delete shared images until you unshare the images.
Before you share a custom image, make sure that all sensitive data and files are removed from the image.
When you share a custom image in different scenarios, complete the following preparations:
To share a custom image with other Alibaba Cloud accounts, you must obtain the IDs of the accounts.
To obtain the ID of an Alibaba Cloud account, log on to the Alibaba Cloud Management Console with the Alibaba Cloud account and move the pointer over the profile picture in the upper-right corner. If the account is tagged with Main Account, the account ID is an Alibaba Cloud account ID.
To share a custom image within your organization based on resource directories or folders, your Alibaba Account must meet the following conditions:
Your Alibaba Account for which the resource directories are disabled is a member of resource directories.
You pass enterprise verification and enable a resource directory and the resource sharing.
Create the AliyunECSShareEncryptImageDefaultRole Resource Access Management (RAM) role and grant permissions to the role. For more information, see the Share encrypted resources across accounts section of the "Encryption-related permissions" topic.
You (sharer) log on to the ECS console and open the Share Image dialog box.
Go to ECS console - Images.
In the top navigation bar, select the region and resource group of the resource that you want to manage.
On the Custom Images tab, find the custom image that you want to share and click Share Image in the Actions column.
In the Share Image dialog box, configure the parameters based on your business requirements.
Scenario 1: Share the custom image with other Alibaba Cloud accounts
In the Sharee Account ID field, enter the IDs of the Alibaba Cloud accounts with which you want to share the custom image.
For the Security Confirmation parameter, select Sharee accounts (recipients) of a shared image can access the image data. To ensure data security, verify the sharee accounts before sharing an image.
Click Confirm.
Scenario 2: Share the custom image within your organization based on resource directories or folders
To the right of the Sharee Type parameter, click Shared Organization.
NoteOnly the management account or members that enabled a resource directory can share resources within an organization. If Shared Organization is not displayed, you must enable a resource directory.
Go to the Resource Management console to complete the sharing operation. For more information, see Create a resource share.
NoteSet the resource type to ECS Image before you can add the resource that you want to share.
After you share the custom image, go to the Custom Images tab, find the image and move the pointer over the icon corresponding to the image to view the Alibaba Cloud accounts with which the image is shared.
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