Basic Concepts
Images are classified as public, private, and shared.
Image Type |
Description |
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Public image |
A public image is a standard, widely used image. It contains an OS and preinstalled public applications and is available to all users. Public images are very stable and their OS and any included software have been officially authorized for use. If a public image does not contain the environments or software you need, you can use a public image to create an ECS and then deploy the required environments or software on it. |
Private image |
A private image contains an OS or service data, preinstalled public applications, and a user's personal applications. Private images are only available to the users who created them. A private image can be a system disk image, data disk image, ISO image, or full-ECS image.
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Shared image |
A shared image is a private image another user has shared with you. For more information about shared images, see "Sharing Images" in Image Management Service User Guide. |
You can modify an image, share images, export images, encrypt images, replicate images, export an image list, and delete images.
Feature |
Description |
Helpful Link |
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Modifying an image |
To facilitate private image management, you can modify the following attributes of an image: name, description, minimum memory, maximum memory, and advanced functions such as NIC multi-queue and SR-IOV driver. |
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Sharing images |
You can share an image with other accounts. These accounts can use your shared private image to quickly create ECSs or EVS disks. |
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Exporting images |
You can export private images to your OBS bucket and download them to your local PC for backup. |
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Encrypting images |
You can create encrypted images to improve data security. The encryption mode is KMS envelope encryption. Encrypted images can be created from external image files or encrypted ECSs. |
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Replicating images |
By replicating images, you can convert encrypted and unencrypted images into each other or enable some advanced features, for example, quick instance provisioning. |
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Tagging an image |
You can tag your private images for easy management and search. |
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Exporting image list |
You can export the public or private image list in a given region in CSV format, facilitating local maintenance and query. |
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Deleting images |
You can delete images that will be no longer used. Deleting an image does not affect the ECSs created from that image. |
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