[PVE-User] [DRBD-user] Stability issue Proxmox4/DRBD9

[Olivier Borowski]

Hi, I'm using DRBD9 with 2 resources (old way) but just remember you 
cannot use anymore dual primary resource until DRBD 9.1 (can lead to a 
kernel crash)

So, I just use autopromote on my resource and to migrate a VM, I just 
shut it down, migrate it, and start it on the other node.

Olivier

Le 11/04/2016 à 15:53, Jean-Laurent Ivars a écrit :
> Hi there !
>
> I did the same as you, I set up my DRBD9 PVE4 the old way (2 ressources…) but I have issues.
> Maybe you did not notice it because your system is not loaded, for example, in my case, everything works perfectly until I try do clone a VM especially when I clone from one ressource to an other one. Sometimes it happen when I choose to « move » a disk from one ressource to the other.
> What happen exactly, you can see it in my first mail to the mailing list. Basically the kernel crash.
>
> Maybe you are lucky and on your material you will have no problem ? I really don’t know, it’s just a suspicion but i think it’s CPU relative.
>
> You will find that it is not production ready on Proxmox DRBD9 wiki page and on Linbit pages :
>
> https://pve.proxmox.com/wiki/DRBD9 <https://pve.proxmox.com/wiki/DRBD9>
> https://www.linbit.com/en/partners/11-en/products-and-services/drbd <https://www.linbit.com/en/partners/11-en/products-and-services/drbd>
>
> regards,
>
> 	
> Jean-Laurent Ivars
> Responsable Technique | Technical Manager
> 22, rue Robert - 13007 Marseille
> Tel: 09 84 56 64 30 - Mobile: 06.52.60.86.47
> Linkedin <http://fr.linkedin.com/in/jlivars/>   |  Viadeo <http://www.viadeo.com/fr/profile/jean-laurent.ivars>   |  www.ipgenius.fr <https://www.ipgenius.fr/>
>> Le 11 avr. 2016 à 14:53, Patrick Kaiser <pk at argonius.de> a écrit :
>>
>> Hi all,
>>
>> i was also just setting up PVE 4.1 with DRBD9. But I’ve setup drbd9 in the “old-way”.
>>
>> Currently there is no load on the system and everything is working like expected. But now I think about resetup everything with latest Proxmox 3.x and latest DRBD 8.
>>
>> I do not see any noticeable feature in PVE 4 I will miss in PVE3 but I am thinking more about problems in Upgrade process later on…
>>
>> Where do you guys got the information, that DRBD 9 is NOT production ready?
>>
>> thanks,
>> patrick
>>
>>
>> On 11 Apr 2016, at 12:08, Jean-Laurent Ivars <jl.ivars at ipgenius.fr <mailto:jl.ivars at ipgenius.fr>> wrote:
>>
>>> Hi Claudio,
>>>
>>> I wonder the same as you and I’m a little bit afraid about the production ready thing…
>>>
>>> I am wondering about downgrading my whole Proxmox installation to have a stable system rather than using something that can brake any day with a simple update… Do you think the version 4 features worth the risk and I should go your way ?
>>>
>>> Thank you for your answer again
>>> Best regards,
>>>
>>> 	
>>> Jean-Laurent Ivars
>>> Responsable Technique | Technical Manager
>>> 22, rue Robert - 13007 Marseille
>>> Tel: 09 84 56 64 30 - Mobile: 06.52.60.86.47
>>> Linkedin <http://fr.linkedin.com/in/jlivars/ <http://fr.linkedin.com/in/jlivars/>>   |  Viadeo <http://www.viadeo.com/fr/profile/jean-laurent.ivars <http://www.viadeo.com/fr/profile/jean-laurent.ivars>>   |  www.ipgenius.fr <http://www.ipgenius.fr/> <https://www.ipgenius.fr/ <https://www.ipgenius.fr/>>
>>>> Le 11 avr. 2016 à 10:13, Claudio Nicora <claudio.nicora at gmail.com> a écrit :
>>>>
>>>> Welcome aboard, and thanks for bringing back an issue that nobody took care of since now.
>>>> It means I was not the alone...
>>>>
>>>> I've had the same issue a few months ago, I've reported it here (and on Proxmox forums) but the issue is still there.
>>>>
>>>> Linbit: nobody took care of it (however it's a kernel crash, should be critical enough...)
>>>> Proxmox: a kernel with an updated DRBD module (still DRBD 9.0) was released but the issue persisted. Still wondering how a "non-production ready" feature could end up in a "production ready" bundle like Proxmox 4 without a choice to get DRBD 8.4 back.
>>>>
>>>> I've sorted it out by downgrading DRBD module to 8.4 and building the kernel module + DRBD tools on my own.
>>>> This is the post on Proxmox forum with a backlink to my blog post where I detailed the actions to downgrade the module.
>>>> I've also set up a script to run after each Proxmox kernel upgrade, just in case.
>>>>
>>>> PS: still waiting for a feedback from Linbit/Proxmox guys ;)
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>>>> drbd-user at lists.linbit.com
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-- 
Olivier Borowski
Service informatique
4murs
Tel : 03 87 63 28 13