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Red Hat Enterprise Linux 9 Essentials Book now available.

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25.10. Configuring guest live migration

Red Hat Virtualization can migrate virtual machines between other servers running Red Hat Virtualization. Further, migration is performed in an offline method (using the xm migrate command). Live migration can be done from the same command. However there are some additional modifications that you must do to the xend-config configuration file. This example identifies the entries that you must modify to ensure a successful migration:
(xend-relocation-server yes)
The default for this parameter is 'no', which keeps the relocation/migration server deactivated (unless on a trusted network) and the domain virtual memory is exchanged in raw form without encryption.
(xend-relocation-port 8002)
This parameter sets the port that xend uses for migration. This value is correct, just make sure to remove the comment that comes before it.
(xend-relocation-address )
This parameter is the address that listens for relocation socket connections, after you enable the xend-relocation-server . When listening, it restricts the migration to a particular interface.
(xend-relocation-hosts-allow )
This parameter controls the host that communicates with the relocation port. If the value is empty, then all incoming connections are allowed. You must change this to a space-separated sequences of regular expressions (such as xend-relocation-hosts-allow- '^localhost\\.localdomain$' ). A host with a fully qualified domain name or IP address that matches these expressions are accepted.
After you configure these parameters, you must reboot the host for the Red Hat Virtualization to accept your new parameters.

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