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- Migrate VM: via destination host (TODO)
- Migrate Volume: via other host (TODO)
- Copy Command: via other host on same cluster or pod or zone, depends on the scope of storage, or cluster of host (TODO)
3.7 Limitations
- Assumption
- Each request does not have multiple commands with same name
- Only support:
- CopyCommand, MigrateCommand, MigrateVolumeCommand
- resources in Migration state (vm, source volume, dest volume)
- Hypervisor: KVM
- Storage: NFS, Local, Powerflex
4. Test cases
Please note:
Migration between NFS and Local requires the fix: https://github.com/apache/cloudstack/pull/10266
| NFS to NFS | NFS to Local | Local to Local | Local to NFS | Powerflex to Powerflex | Powerflex to NFS | NFS to Powerflex | |
|---|---|---|---|---|---|---|---|
| Migrate VM | PrepareForMigrationCommand (dest) MigrateCommand (source) | - | - | - |
PrepareForMigrationCommand (dest) MigrateCommand (source) | - | - |
| Migrate VM with volumes | CopyCommand (template to primary if needed) CreateObjectCommand (new volume) ModifyTargetsCommand PrepareForMigrationCommand (dest) MigrateCommand (source) |
DeleteCommand (source) | same as "NFS to NFS" | same as "NFS to NFS" | same as "NFS to NFS" | |||
| Migrate ROOT |
| Volume (of Running VM) |
| KVM does not support volume live migrationdue to the limited possibility to refresh VM XML domain. Therefore, to live migrate a volume between storage pools, one must migrate the VM to a different host as well to force the VM XML domain update. Use 'migrateVirtualMachineWithVolumes' instead. | same | same | same | ||||
| Migrate ROOT Volume (of Stopped VM) | CopyCommand (primary1 to secondary) CopyCommand (secondary to primary2) DeleteCommand (secondary) DeleteCommand (primary1) | same | same | same | |||
| Migrate DATA Volume (of Running VM) | KVM does not support volume live migrationdue to the limited possibility to refresh VM XML domain. Therefore, to live migrate a volume between storage pools, one must migrate the VM to a different host as well to force the VM XML domain update. Use 'migrateVirtualMachineWithVolumes' instead. | same | same | same | |||
| Migrate DATA Volume (of Stopped VM) | CopyCommand (primary1 to secondary) CopyCommand (secondary to primary2) DeleteCommand (secondary) DeleteCommand (primary1) | same | same | same | |||
| Migrate DATA Volume (unattached) | CopyCommand (primary1 to secondary) CopyCommand (secondary to primary2) DeleteCommand (secondary) DeleteCommand (primary1) | same | same | same |
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