XAPI VM Migration

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Revision as of 12:14, 11 July 2013 by Lars.kurth (talk | contribs)


XAPI VM Migration

Here's an overview of how xapi does migration of VMs. The code can be found in api.hg/ocaml/xapi/xapi_vm_migrate.ml.

Receiver
* attach the VDIs
* create the domain
* restore the devices (unless we must delay until after VDI activation)
* send handshake to transmitter
Synchronisation point 1
* restore the domain, deserialising it from the transmitter
Synchronisation point 2
* receive handshake from transmitter
Synchronisation point 3
* activate VDIs (unless it's a localhost migrate)
* restore the devices (unless done already)
* unpause the domain
* plug PCI devices
* send handshake to transmitter
Synchronisation point 4

You may be interested in a proposal for CrossPoolMigration