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Migrating Instances Among CDHs

Last updated: 2021-09-27 18:45:46


    This document describes how to migrate instances among dedicated hosts.


    To migrate an instance, note the following:
    The instance to migrate is shut down.
    An instance with local disks cannot be migrated.
    Use VPC for the migiration. If you need to migrate an instance in the classic network, switch to VPC
    The destination CVM Dedicated Host (CDH) should meet the following requirements:
    Both the source and destination CDHs are in the same availability zone of a single region under the same account.
    The destination CDH has sufficient available resources. The available CPU and memory resources should be no less than that of the instances to migrate.


    1. Log in to the CVM console and click Dedicated Hosts on the left sidebar.
    2. Select the region where the CDH resides.
    3. Click the ID/Host Name of the CDH that hosts the instance to migrate to enter the details page. Select the Instance List tab.
    4. Migrate one or multiple instances in the list as needed:
    Migrating a single instance
    Batch migrating instances
    Select the instance to migrate, and click More > Change Host under the Operation column.
    Select instances to migrate, and select More Actions > Change Host above the list.
    5. In the pop-up window, select a destination host.
    6. Click OK. Refresh the Dedicated Hosts page. You can see that the instances reside in another host after the migration, and they are shut down.
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