[DRBD-user] how to drbd the / filesystem device

Alex Dean alex at crackpot.org
Mon May 3 19:46:02 CEST 2010

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


On May 3, 2010, at 12:27 PM, Bart Coninckx wrote:

> On Monday 03 May 2010 19:26:32 Joao Ferreira gmail wrote:
>> Hello all,
>>
>> I've been reading and trying out drbd for the last 3 days. I know  
>> this
>> may sounds a bit crazy, but... here goes: I realy need to drbd my "/"
>> block device.
>>
>> I have a basic understanding of drbd and most examples I've seen so  
>> far
>> point to drbd'ing a specific partition apart from the "core" OS
>> partitions like "/", "/var";
>>
>> I don't know if drbd'ing the "/" partition is acutally an  
>> impossibility
>> "just because" or if there are ways to work around this and make the
>> kernel be able to boot the drbd and mount the root filesystem on it.
>>
>> Like I said: I really don't know if this is a simple thing or a very
>> complex workaround or even totally impossible.
>>
>> My problem is simple: boss want's it :)
>>
>> Any pointers or some light on the matter would be very much  
>> appreciated.
>>
>> Cheers
>> Joao
>>
>
> I've read before on this list it is near to impossible. But I wonder  
> what
> would happen of you would put something on DRBD and to a pivot root  
> to it.

I'm not an expert by any means, but the first major hurdle I see is :  
How would the secondary node operate if it can't have / mounted?   
Perhaps you're talking about running primary/primary, which I don't  
have direct experience with.

alex
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