Creating a FlexusX Instance from a Private Image or Using a Private Image to Change the OS

Scenarios

You can use a private image to quickly create FlexusX instances with the same configurations or change the OS of a FlexusX instance. A private image can be created from a Huawei Cloud server or from an external image file. For more information, see Image Management Service.

Billing

System disk images and data disk images can be used for free.
If a full-server image is created using Cloud Server Backup Service (CSBS) or Cloud Backup and Recovery (CBR), you will be billed for the storage and cross-region replication traffic on a pay-per-use basis. For details, see CBR Billing Items.
If a private image is created using a cloud server created from a KooGallery image, the image will be billed based on the KooGallery image pricing details.

Constraints

Images are regional resources. FlexusX instances can only use private images that are in the same region as them.
Only private images created using x86 servers are supported in FlexusX.
For Windows private images, FlexusX instances only support Windows Server 2022/2019/2016/2012 R2 Standard Edition and Data Center Edition images purchased from Huawei Cloud KooGallery, as well as Windows private images with the Bring Your Own License (BYOL).
When you use a private image to create a FlexusX instance or change the OS, ensure that the instance specifications (vCPUs, memory, and system disk capacity) meet the requirements of that private image. Otherwise, the private image cannot be used.

Preparations

First, you need to create a private image based on one of the three scenarios described here.

**Table 1** Creating or importing an image using IMS
Image Source		Reference
Scenario 1	If your private image is created from a Huawei Cloud ECS or BMS, it can be used in the current region. If you want to use the private image in another region, replicate the image to the region where you want to use it first.	Creating a System Disk Image from a Linux ECS Replicating Images Across Regions
Scenario 2	If your private image is created on another cloud platform or downloaded from a third party, import the private image using IMS. The import process depends on the image file format. The following formats are supported: VMDK, VHD, QCOW2, RAW, VHDX, QED, VDI, QCOW, ZVHD2, and ZVHD ISO	Creating a Linux System Disk Image from an External Image File Creating a Linux System Disk Image from an ISO File
Scenario 3	If you want to use a private image from another account, ask the account owner to share the image with you, and you can replicate the shared image as a private image.	Sharing Images Replicating a Shared Image

Creating a FlexusX Instance from a Private Image

After creating or importing a private image using IMS, you can select the private image from the image list when creating a FlexusX instance. For details about how to purchase a FlexusX instance, see Purchasing a FlexusX Instance.

Figure 1 Creating a FlexusX instance from a private image
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Using a Private Image to Change the OS of a FlexusX Instance

After creating or importing a private image using IMS, you can use the private image to change the OS of your FlexusX instance. For details, see Changing the OS of a FlexusX Instance.

Figure 2 Using a private image to change the OS of a FlexusX instance
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