[DRBD-user] Stability issue Proxmox4/DRBD9

Claudio Nicora claudio.nicora at gmail.com
Tue Apr 12 08:56:52 CEST 2016

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


 > If you're doing 2 node ha configurations, then drbd9 really isnt for you

That's why I still wonder why Proxmox removed 8.4.
I think a lot of low-mid sized setups are two nodes only, at least in 
development labs.

Re-upgrading to 9.x is not an option now: I got back to 8.4 (as 
described before) with nodes in production state, near-to-no 
documentation supporting me and no certainty of the result.
DRBD 8.4 works perfectly for my needings, I won't relive that feeling in 
a short time ;)
Maybe I'll try DRBD 9.1 when available...


Il 11/04/2016 20:08, Chuck Smith ha scritto:
> Claudio, et al;
> I'm not rushing to the defense of various parties, but I've been 
> actively engaged in testing 9.0.x since its initial release and yes, 
> its been a bear to make it become stable. However the rewards out 
> weigh the troubles, a fully engaged mesh is very powerful approach and 
> auto-promote makes it so much easier than traditional ocf. If you're 
> doing 2 node ha configurations, then drbd9 really isnt for you, its 
> power is in multi-node,  and its higher throughput with the new 
> networking stacks and auto-promote.
> If you do want to realize the benefits and continue down the path, I'd 
> recommend going to top-of-tree and building 9.0.1++, I have seen a 
> quite a few fixes that the readme glosses over, and that may help you 
> progress.
> Regards
> -Chuck
>
> On 4/11/2016 3:08 AM, Jean-Laurent Ivars 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/>   | Viadeo 
>> <http://www.viadeo.com/fr/profile/jean-laurent.ivars>   | 
>> 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 <mailto:drbd-user at lists.linbit.com>
>>> http://lists.linbit.com/mailman/listinfo/drbd-user
>>
>>
>>
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>

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