Updated on 2025-07-18 GMT+08:00

Migrating ECSs Across AZs

Scenarios

Migration Center (MgC) provides a single place for you to easily migrate, modernize, and optimize your applications using tools built based on Huawei Cloud migration methodologies and best practices. With MgC, you can create a migration workflow quickly and easily based on different migration scenarios.

You can use the cross-AZ migration function of MgC to efficiently and visually migrate resources and switch services between AZs. This section describes how to migrate ECSs across AZs on the ECS console.

Preparations

  • Prepare a HUAWEI ID or an IAM user that has required permissions to use MgC. For details, see Preparations.
  • On the MgC console, create an independent project for the migration and set Project Type to Application migration. For details, see Managing Projects.
  • On the MgC console, create an application for the migration. Set Business Scenario to Cross-AZ migration-Cross-AZ migration, Target Region to the destination region, and Target AZ to the AZ where ECSs will be migrated. For details, see Creating an Application.

Constraints

  • Servers whose system disk is greater than 1 TB cannot be migrated.
  • Frozen servers in the retention period cannot be migrated.

For more constraints about cross-AZ migration, see Cross-AZ Server Migration.

Procedure

  1. Log in to the management console and access the Elastic Cloud Server page.
  2. Click in the upper left corner and select a region and project.
  3. In the Operation column of the ECS to be migrated, choose More > View O&M and Monitoring > Migrate Across AZs.

    The Migration Center (MgC) page is displayed.

  4. In the left navigation pane, select the created project for application migration from the drop-down list.
  5. Configure cross-AZ migration for ECSs.

    The table below lists the steps for configuring cross-AZ migration. For details, see Migrating Servers Across AZs on Huawei Cloud.

    Table 1 Configuring cross-AZ migration

    Step

    Description

    Step 1: Discover servers in the source AZ

    On the Cloud Discovery page, if you select an application from the Application (Optional) drop-down list in the Basic Information area, all discovered servers will be grouped into the application.

    If you only want to migrate a specified ECS, go to the next step. You do not need to specify Application (Optional) here.

    Step 2: Group servers as an application

    Select the servers to be grouped as an application.

    Step 3: Get target recommendations

    Assess the servers grouped into an application. If the assessment fails, you can click Modify Target Configuration to manually update the specifications, disk type, and disk storage for a target server.

    Step 4: Create a cross-AZ migration workflow

    Create a cross-AZ migration workflow and migrate the servers as instructed.