Creating a Full-ECS Image from a CSBS Backup

Scenarios

Create a full-ECS image from a CSBS backup. This image can then be used to create ECSs.

CSBS is being gradually replaced by CBR. If CSBS Backup is unavailable for Source, select another image source.

Background

• If you use a CSBS backup to create a full-ECS image, you will only be charged for the CSBS backup. For detailed service pricing, see Cloud Server Backup Service in Product Pricing Details.
• When deleting a full-ECS image, you can choose whether to delete the associated CSBS backup. If you choose not to delete the CSBS backup, you will continue to be charged for it.
• If you use a full-ECS image to change an ECS OS, only the system disk data can be written into the ECS. Therefore, if you want to restore or migrate the data disk data of an ECS by using a full-ECS image, you can only use the image to create a new ECS rather than use it to change the ECS OS.

Constraints

• When creating a full-ECS image from a CSBS backup, ensure that the source ECS of the CSBS backup has been properly configured, or the image creation may fail.

  For details, see How Do I Configure an ECS, BMS, or Image File Before I Use It to Create an Image?

• If an ECS is in Stopped state, do not start it when you are using it to create a full-ECS image.
• A CSBS backup used to create a full-ECS image cannot have shared disks.
• Only an available CSBS backup can be used to create a full-ECS image. A CSBS backup can be used to create only one full-ECS image.
• A full-ECS image cannot be published in KooGallery.
• A full-ECS image cannot be exported.
• A full-ECS image cannot be replicated within a region.
• Cross-region replication of full-ECS images is only available for certain regions.

  If a full-ECS image cannot be replicated to a different region, you can use it to create an ECS, use the ECS to create a system disk image and a data disk image, and replicate the images to the destination region.

  A full-ECS image created using an ECS backup can be replicated from the region where they reside to another region, but the replicated full-ECS image cannot be replicated across regions again.

Procedure

1. Log in to the IMS console.
2. Create a full-ECS image.
   1. Set image parameters.
   2. You need to set parameters in two areas: Image Type and Source and Image Information. For details about the parameters, see Table 1 and Table 2.
      Figure 1 Image type and source

      

      Table 1 Parameters for configuring the image type and source

      Parameter	Description	Example Value
      Region	Resources in different regions cannot communicate with each other over an intranet. For low latency and fast access, select a region close to where your services will be provided.	-
      Type	Private images can be created or imported.	Create Image
      Image Type	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. It can only be used to provision temporary cloud servers. 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.	Full-ECS image
      Source	A source is the original data required for creating a private image. Select a source based on your requirements. Generally, a data source can be a cloud server, a CSBS backup, or a CBR backup.	CSBS Backup

      Figure 2 Image information
      

      Table 2 Parameters for configuring image information

      Parameter	Description	Example Value
      Name	Set a name for the image.	-
      Enterprise Project	This parameter is for enterprise users. To use this function, contact customer service to enable it. An enterprise project groups cloud resources, so you can manage resources and users by project. The default project is default. Select an enterprise project from the drop-down list.	default
      Tag	This parameter is optional. Set tag keys and values for the image to make identification and management easier. You are advised to create predefined tags in TMS. For details, see Creating Predefined Tags. NOTE: If your organization has configured tag policies for images, you need to add tags to your images based on the policies. Otherwise, tags may fail to be added. For details about image tag format, see Image Tag Format.	-
      Description	This parameter is optional. Enter a description for the image.	-
      Agreement	Read and agree to the Image Disclaimer	-

   3. Click Next. Confirm the settings and click Submit.

3. Go back to the private image list and check the new full-ECS image status.

   When the image status changes to Normal, the image creation is complete.

Follow-up Procedure

• If you want to use the full-ECS image to create ECSs, click Apply for Server in the Operation column. On the displayed page, create ECSs by following the instructions in Elastic Cloud Server User Guide.
  

  When you use a full-ECS image to create an ECS:

  • The system and data disk information defaulted by the image will be automatically displayed.
  • If the full-ECS image contains multiple data disks, it takes some time to load and display the disk information.
• If you use a full-ECS image to change an ECS OS, only the system disk data can be written into the ECS. Therefore, if you want to restore or migrate the data disk data of an ECS by using a full-ECS image, you can only use the image to create a new ECS rather than use it to change the ECS OS.
• If you want to share a full-ECS image with other tenants, you must migrate the associated backup to CBR first because only full-ECS images created from CBR backups can be shared. For details, see Resource Migration from CSBS/VBS.