Replicating Images Within a Region

Scenarios

You can convert encrypted and unencrypted images into each other or enable some advanced features (such as fast ECS creation from an image) using in-region image replication. You may need to replicate an image to:

• Replicate an encrypted image to an unencrypted one.

  Encrypted images cannot be shared with other tenants or published in KooGallery. If you want to publish or share an encrypted image, you can replicate it to an unencrypted one.

• Replicate an encrypted image to an encrypted one.

  Keys for encrypting the images cannot be changed. If you want to change the key of an encrypted image, you can replicate this image to a new one and encrypt the new image using an encryption key.

• Replicate an unencrypted image to an encrypted one.

  If you want to store an unencrypted image in an encrypted way, you can replicate this image as a new one and encrypt the new image using a key.

• Optimize a system disk image so that it can be used for fast ECS creation.

  Fast Create greatly reduces the time required for creating ECSs from a system disk image. Currently, this feature is supported by all newly created system disk images by default. Existing system disk images may not support it. You can enable them to support this feature through in-region image replication. For example, if image A does not support fast ECS creation, you can replicate it to generate image copy_A that supports fast ECS creation.

Constraints

• Full-ECS images cannot be replicated within the same region.
• Private images created using ISO files do not support in-region replication.
• The size of an image to be replicated within a region cannot be greater than 128 GB.

Prerequisites

The images to be replicated are in the Normal state.

Procedure

1. Log in to the IMS console.
2. Locate the row that contains the image to be replicated, click More in the Operation column, and select Replicate.
3. In the displayed Replicate Image dialog box, set the following parameters:
   Figure 1 Replicating images within a region
   

   Table 1 Parameters

   Parameter	Description	Example Value
   Replication Mode	Images can be replicated within a region or across regions. NOTE: This parameter is available only when the current region supports cross-region replication.	Within Region
   Name	Enter a name that is easy to identify. The default image name is in the following format: copy_<name-of-the-region-where-the-source-image-is-located>_<source-image-name>.	copy_image_001
   Enterprise Project	This parameter is for enterprise users. To use this function, contact customer service to enable it. An enterprise project groups cloud resources, so you can manage resources and users by project. The default project is default. Select an enterprise project from the drop-down list.	default
   Description	This parameter is optional. Enter a description for the image.	-
   Encryption	This parameter is optional. If you want to encrypt the image, select KMS encryption and select the key name to be used from the key list. After you select KMS encryption, the system will create a default key ims/default for you. You can also select a key from the key list. For details about how to encrypt an image, see Introduction.	-

4. Click OK.

   On the Private Images page, view the replication progress. If the status of the new image becomes Normal, the image replication is successful.