Xen ECS EOS

Since all versions of the Xen virtualization platform used by Huawei Cloud have reached end of service (EOS), Huawei Cloud cannot obtain patch updates or community support. After detecting new security risks, Huawei Cloud cannot provide patches and technical support for users, which is risky to user services. Therefore, Xen ECSs on Huawei Cloud are EOS accordingly.

• After the Xen virtualization platform is EOS, Huawei Cloud cannot provide patch updates and technical support for newly detected security risks. As a result, security risks may occur in user services.
• New disks and NICs cannot be attached to existing Xen ECSs when the ECSs are running.
• The backups of an existing Xen ECS cannot be used to create Xen ECSs, and the KVM ECSs created using a Xen ECS backup cannot be started.

Huawei Cloud will use KVM to replace Xen. Compared with Xen, KVM provides more functions, better stability, and higher performance. KVM ECSs surpass Xen ECSs in:

• Fault detection
• Live migration
• Remote high availability (HA)

KVM can better meet the cloud computing requirements. The majority of users are using KVM, and most Xen users have switched from Xen to KVM.

Change a Xen ECS to a KVM ECS by modifying specifications on the ECS console.

Modifying specifications will change how much you need to pay for the ECS. For details, see Pricing of a Changed Specification.

The following Xen ECS series require specification modification: C1, C2, M1, S1, H1, E1, E2, Et2, and G1 ECSs. Table 1 lists recommended KVM flavors. The available ECS flavors vary based on the offerings in your region.

• Before changing a Xen ECS to a KVM ECS, stop the ECS, which will interrupt services running on the ECS. After the change is complete, start the ECS to restore service running.
• After the change is complete, the underlying virtualization platform is changed from Xen to KVM, which does not affect services.

Before changing a Xen ECS to a KVM ECS, manually install desired drivers on the ECS. If there are no drivers installed on the ECS, the ECS will be unavailable (the OS cannot be started) after the specifications are modified. After drivers are installed, do as follows:

• Windows
  1. Create a system disk snapshot.
  2. Check the UVP VMTools version.
  3. Install or upgrade UVP VMTools.
  4. Modify specifications.
  5. Check disk attachment.

  For details, see Changing a Xen ECS to a KVM ECS (Windows).

• Linux
  For Linux, you are advised to use a script to automatically install desired drivers for specification modification.

  • Using a script for automatic driver installation
    1. Create a system disk snapshot.
    2. Use a script to automatically install drivers.
    3. Modify specifications.
    4. Check disk attachment.

    For details, see Automatically Changing a Xen ECS to a KVM ECS (Linux).

  • Manually installing drivers
    1. Create a system disk snapshot.
    2. Install drivers.
    3. Verify the ECS configuration.
    4. Modify specifications.
    5. Check disk attachment.

    For details, see Manually Changing a Xen ECS to a KVM ECS (Linux).