Re: Secure migration of LVM based guests over WAN

Avi Kivity
2012-10-16T10:10:43Z

On 10/16/2012 11:48 AM, Lukas Laukamp wrote:
> Am 16.10.2012 11:40, schrieb Avi Kivity:
>> On 10/16/2012 11:12 AM, Lukas Laukamp wrote:
>>> Hey all,
>>>
>>> I have a question about a solution for migrate LVM based guests directly
>>> over the network.
>>>
>>> So the situation: Two KVM hosts with libvirt, multiple LVM based guests
>>> Want to do: Migrate a LVM based guest directly to the other host over an
>>> secure connection
>>>
>>> I know that migration is possible when the VM disks are stored on an
>>> NFS, GFS2 filer/cluster etc.
>>>
>>> So would it be possible to do an offline migration directly with netcat
>>> or something like that?
>>>
>> If all you need is offline, you can use scp to copy each volume to the
>> destination volume. Make sure the guests are shut down when you do that.
>>
>> It is also possible to do a live migration, but unless the destination
>> and source are in the same IP subnet, the guests are going to lose
>> connectivity.
>>
>>
>
> Hello Avi,
>
> so can I simply copy an logical volume to the path of the volume group
> with scp?

Yes. Best to enable compression to avoid sending zero blocks.

>
> For the live migration theme, it would be no problem when the guests
> looses connectivity, how could be done a live migration?
>

See the -b option to the migrate command.

--
error compiling committee.c: too many arguments to function