Re: Secure migration of LVM based guests over WAN

Lukas Laukamp
2012-10-17T10:19:06Z

Am 16.10.2012 12:10, schrieb Avi Kivity:
> 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.
>

I will read a little bit about the live migration theme.

Best Regards