Image Replication

When Do I Need to Replicate an Image?

• In-region replication

  This is used for conversion between encrypted and unencrypted images or for enabling advanced features (such as fast ECS creation). For details, see Replicating Images Within a Region.

What Images Can I Replicate?

Only private images can be replicated. The restrictions on image replication are as follows:

• In-region replication

  Private images created from ISO files or full-ECS images cannot be replicated within a region.

Can I Replicate Images Across Regions Between the Chinese Mainland, International, and European Websites?

The Chinese Mainland, International, and European websites are accessed by using different accounts. You cannot replicate images between these websites through cross-region replication. However, there is a way to do the replication.

For example, if you want to replicate a system disk image from the CN-Hong Kong region of the International website to the CN East-Shanghai1 region of the Chinese Mainland website, perform the following operations:

1. Log in to the console of the International website, export the image from the CN-Hong Kong region to an OBS bucket in that region, and download the image to a local directory. Assume that the image file is exported as Windows Server 2012.qcow2.

   For details, see Exporting an Image.

2. Log in to the console of the Chinese Mainland website, switch to the CN East-Shanghai1 region, and upload the Windows Server 2012.qcow2 image file to an OBS bucket in that region.

   For details, see Uploading an Image File.

3. Register the image file as a private image

   For details, see Registering an Image File as a Private Image.

How Long Does It Take to Replicate an Image?

The time required for replicating an image depends on the network transmission speed and the number of tasks in the queue.

How Will I Be Billed for Replicating Images?

• In-region replication

  The replicas of system disk and data disk images are stored in OBS buckets for free.

  

  Full-ECS images cannot be replicated within the same region.

How Do I Replicate an Image Between Projects in a Region?

You can use image sharing to replicate images between projects in the same region.

In the Share Image dialog box, enter target project IDs, and click OK, as instructed in Sharing Specified Images. After the image is shared, switch to the target projects. On the Image Management Service > Images Shared with Me page, you can view the shared image to be accepted.

Figure 1 Accepting or rejecting shared images