An image is a running environment template for ECS instances. It generally includes an operating system and preinstalled software. You can use an image to create an ECS instance or change the system disk of an ECS instance. It works as a file copy that includes data from one more multiple disks. These disks can be a single system disk, or the combination of the system disk and data disks.
ECS provides a diverse types of images for you to easily access image resources.
|Public image||Public images officially provided by Alibaba Cloud support nearly all main Windows and Linux versions. Including:
||Officially provided by Alibaba Cloud|
|Custom image||Custom mirrors created based on your existing physical server, virtual machine, or cloud host. These images are flexible to meet your personalized needs.||
|Cloud Marketplace||Provided by third-party service providers (ISV, independent software) Vendor). The image of the Marketplace includes not only the operating system required for the application, but also the configuration environment. It saves you complicated deployment process and deploy the environment with one-click.|
|Shared image||Shared by other Alibaba Cloud users.||A Custom image shared by ther Alibaba Cloud users.|
Currently, ECS supports VHD and RAW. You must convert other formats into VHD or RAW to use them in ECS
Details of the images are as follows:
|Custom image||Free. Potential costs include:
|Alibaba Cloud Marketplace||Subject to ISV policies.|
|Shared image||If the origine of the shared image is from the Marketplace, it is subject to the ISV policies.|
For more information, seeECS Pricing.
Except for public images, custom images, Marketplace images, and shared images vary depending on the region. For more information about regions and zones, see General Reference-Regions and zones。
You can create instances by using existing images.
You can change the system disk in any of the following ways:
- Using a public image
- Using other images other than public ones
You can obtain custom images in the following ways:
- Creating a custom image by using a snapshot
- Creating a custom image by using a an instance
- Importing a custom image
You can copy your custom images to other regions.
You can share your custom images with other Alibaba Cloud users.
You can export custom images to local testing environments or your private cloud environments.
You can view the .Development Guide for APIs about images.