Basic Concepts

Public

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.

Public images include the following OSs to choose from: Huawei Cloud EulerOS, CentOS, Debian, openSUSE, Fedora, Ubuntu, EulerOS, and CoreOS.

For more information, see Managing Public Images.

Private

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.

• A system disk image contains an OS and preinstalled software for various services. You can use a system disk image to create ECSs and migrate your services to the cloud.
• A data disk image contains only service data. You can use a data disk image to create EVS disks and use them to migrate your service data to the cloud.
• An ISO image is created from an external ISO image file. It is a special image that is not available on the ECS console.
• A full-ECS image contains an OS, preinstalled software, and service data. A full-ECS image is created using differential backups and the creation takes less time than creating a system or data disk image that has the same disk capacity.

Shared

A shared image is a private image another user has shared with you.

For more information, see Sharing Images.

KooGallery

KooGallery is an online store where you can purchase third-party images that have the OS, application environments, and software preinstalled. You can use these images to deploy websites and application development environments in just a few clicks. No additional configuration is required.

KooGallery images are provided by service providers who have extensive experience in configuring and maintaining cloud servers. All the images are thoroughly tested and have been approved by Huawei Cloud KooGallery and service providers before being published.

Modifying an image

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.

Modifying an Image

Sharing images

You can share an image with other Huawei Cloud accounts. These accounts can use your shared private image to quickly create ECSs or EVS disks.

• Sharing Images
• Image Sharing FAQs

Exporting images

You can export private images to your OBS bucket and download them to your local PC for backup.

Exporting an Image

Encrypting images

You can create encrypted images to improve data security. KMS envelope encryption is used.

Encrypted images can be created from external image files or encrypted ECSs.

• Encryption Method
• Creating Encrypted Images

Replicating images within a region

By replicating images within a region, you can convert encrypted and unencrypted images into each other or enable some advanced features, for example, fast instance provisioning.

Replicating Images Within a Region

Replicating images across regions

You can replicate private images created in one region to another region. Cross-region replication can be used together with image sharing for cross-region, cross-account image replication.

Replicating Images Across Regions

Tagging an image

You can tag your private images for easy management and search.

Tagging an Image

Exporting image list

You can export the public or private image list in a given region as a CSV file for local maintenance and query.

Exporting Image List

Deleting images

You can delete images that will be no longer used. Deleting an image does not affect the ECSs created from that image.

Deleting Images