Can I specify the system disk space when using an image to create an ECS?

When an image is used to create an ECS, the system disk space of the ECS cannot be specified freely and must be the same as the system disk space of the image.

How many private images can an account create at most?

At present, you can create a maximum of 10 private images in a region by default. If you need to create more private images, you can apply for increasing the upper limit of quota by submitting a ticket.

How do I apply a private image to an existing ECS?

If a private image is located in the same region as an ECS, you can apply the private image to the existing ECS by changing the OS.

Do I need to shut down the ECS when I create a private image via an ECS?

Yes. If the ECS is not shut down, the ECS may be in the data read/write state. In this case, creating an image may cause loss of data.

What if no image I need is available?

You can upload a private image, create an image via an ECS or get an image shared by another user.

What system architecture is supported for creating a private image?

At present, CT cloud supports only the x86_64 system architecture for the creation of an private image. The ARM architecture will be supported later.

What image formats are supported for creating a private image?

A private image can be created in the format of RAW and QCOW2.

What if I want to upload a private image in an unsupported format?

You can use the qemu-img open source tool to convert an image to a supported format before uploading it.

What if parameters are selected incorrectly for the creation of a private image via an image file?

If the OS, system architecture and image format are selected incorrectly, the actual image file does not match the selected OS and creating an ECS may fail; and if the address of the image file is incorrect, creating a private image will fail. You must delete the incorrect image and select the correct parameters to create a private image.

What OSs are currently supported?

Windows, Ubuntu and CentOS are supported now. CentOS faces the risk of service suspension. A localized OS will go live subsequently to replace CentOS.

What if the number of private images reaches the upper limit?

The default upper limit of private images is 10. If you want a larger number of private images, you can apply for increasing the quota.

Is there a limit on the number of users sharing an image?

Yes. The upper limit is 100. To increase the upper limit, you can apply for increasing the quota.

Can images on the cloud be saved locally?

Images on the cloud can be exported and saved locally with the image export function.

Can shared images be deleted?

Yes. Upon shared images are deleted, the shared images of the image receivers are also deleted synchronously. Therefore, to avoid the impact on normal business of the other party, you should notify the other party to back up the shared images before deleting the images.

Does deletion of an image affect a created ECS?

No. The ECS can still be used.

Is sharing an image across regions supported?

Not supported.

Image Management Service

Operation