[DRBD-user] DRBD, Xen, HVM and live migration

Bart Coninckx bart.coninckx at telenet.be
Tue May 10 17:35:41 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


One word: Windows.

Cheers,

B.


On 05/10/11 17:26, Boyko Yordanov wrote:
> What makes HVM requisite?
>
> Regarding backups, I think the approach depends on VBD's type/nature.
>
> All best!
>
> Boyko
>
> On May 10, 2011, at 6:20 PM, Bart Coninckx wrote:
>
>> Hi Boyko,
>>
>> HVM is a requisite I'm afraid, that's the reason why I can't the drbd block script.
>>
>> OK, thank you, I will it this way. There is then still the question about how to backup, but I will create a new post for that.
>>
>> thx,
>>
>> B.
>>
>>
>>
>> On 05/10/11 17:15, Boyko Yordanov wrote:
>>> Hi,
>>>
>>> For live migration use PV DomUs and Xen's drbd block script - it automatically switches primary/secondary states on both domUs while migrating.
>>>
>>> Anyway yes, its that simple - two primaries and live migration works.
>>>
>>> Note: I've been having some issues (crashes) with centos xen kernel and drbd 8.3.10 - don't have the time to investigate further.
>>>
>>> Boyko
>>>
>>> On May 10, 2011, at 6:05 PM, Bart Coninckx wrote:
>>>
>>>> Hi,
>>>>
>>>> I want to combine all the above mentioned technologies.
>>>>
>>>> The Linbit pages warn not to use the drbd: VBD with HVM DomUs.
>>>>
>>>> This page however:
>>>>
>>>> http://publications.jbfavre.org/virtualisation/cluster-xen-corosync-pacemaker-drbd-ocfs2.en
>>>>
>>>> (thank you Jean), simply puts two DRBD devices in dual primary mode and starts Xen DomUs while pointing to the DRBD devices with phy: in the DomU config files.
>>>> Live migration and HVM seem possible.
>>>>
>>>> Is it as simple as Jean describes it? What is the advantage then of the drbd: VBD? Just seeing to it that the dual primary is available (which is handled on Jean's Howto by Pacemaker)?
>>>>
>>>>
>>>> Thx!
>>>>
>>>>
>>>> B.
>>>
>



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