[DRBD-user] can't mount on secondary node

CAMPBELL Robert robert.campbell at morpho.com
Wed Feb 1 16:30:18 CET 2012

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


Martin,

I'm actually running a dual-active Samba server with a shared GFS2 
file-system (block-replicated by DR:BD). I'm also (ab)using it for an 
Apache/Tomcat installation with session replication in Tomcat through a 
shared file-system.

Of course, all this is balanced using RR-DNS, and when one node fails, 
the cluster resource (IP address) is taken over by the surviving node to 
re-establish service (at somewhat lower performance).

Did a kitten just die?

Robert Campbell

On 1-2-2012 15:38, Martin Gerhard Loschwitz wrote:
> Am 01.02.12 14:59, schrieb Felix Frank:
>    
>> On 02/01/2012 02:44 PM, Martin Gerhard Loschwitz wrote:
>>      
>>> Every time somebody recommends to use Pacemaker with
>>> OCFS2, god kills a kitten.
>>>        
>> News to me. Care to elaborate? Better alternatives?
>>      
> For a company I used to work for, I wrote a very extensive guide on
> why using DRBD in Dual-Primary mode is not a good idea (let alone
> using OCFS2 or GFS2 on top of it). I can't link to it here directly,
> but googling for "DRBD Dual-Primary think twice" should get you
> going.
>
> Long story short: Don't look for "better alternatives" to OCFS2 or
> GFS2; instead, get rid of the requirement to run a shared FS.
>
> The ability to do live-migration is one of the very few real-world
> use-cases I have ever seen where using DRBD in Dual-Primary mode is
> justified.
>
> Best regards
> Martin
>
>    




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