XAPI VM Migration
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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
