Migrate Instances Between Node Controllers

In order to ensure optimal system performance, or to perform system maintenance, it is sometimes necessary to move running instances between Node Controllers (NCs). You can migrate instances individually, or migrate all instances from a given NC.

Important: For migrations to succeed, you must have INSTANCE_PATH set to the same value in the eucalyptus.conf file on each NC.

In some cases, timeouts may cause a migration to initially fail. Run the command again to complete the migration.

If the migration fails, check the nc.log file on the source and destination NCs. If you see an error similar to:
libvirt: Cannot get interface MTU on 'br0': No such device (code=38)
... then ensure the NCs have the same interface and bridge device names, as described in Configure Bridges.