Image Management Service (IMS) refers to the operation environment template to launch an ECS instance, generally comprising operation system and pre-loaded software. Users can quickly deploy applications on ECSs with cloud images

Images are divided into public images, private images and shared images. Public images are provided by the system by default; private images are created by users; and shared images are private images shared by other users.

Image Type	Descriptions
Public Image	All users can use standard operating system images including OS and preinstalled public applications. The maintenance of public images is provided by eSurfing Cloud. Public images are highly stable and are genuinely licensed. Please be assured when using public images. You can also configure the application environment or related software according to actual requirements. The public images supported by official public images include CentOS, Ubuntu and Windows.
Private Image	Private images are uploaded or created by users and are visible to only users who create them. Private images are not as standard or secure as public images. Users need to control the private images they use. Private images include system disk images and data disk images, in which: System disk images: including OS images and application images required by users to run services. System disk images can be used to create an ECS and migrate business to the cloud. Data disk images: including only images of user business data. Data disk images can be used to create an EVS and migrate business data to the cloud.
Shared Image	The images shared by other users can be directly used.