[DRBD-user] a Newbie's Questions

Lars Ellenberg Lars.Ellenberg at linbit.com
Sun Oct 30 19:21:10 CET 2005

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


/ 2005-10-30 05:12:38 +0300
\ Louai Al-Awami:

> 1.	Suppose I mounted my drbd drive on the primary node using 
> 
> mount     /dev/drbd/0     /tmp/drbd

you definetly do not want a mount point in /tmp.
put it in /mnt, or wherever. but not in tmp.

> then I moved my webpage into drbd using:
> 
> cp /var/www /tmp/drbd 
> 
>  
> 
> Finally, I make a soft link to the replicated webpage using
> 
> ln -s /tmp/drbd /var/www
> 
> The question is how to do this automatically,

I don't really understand what exactly you want to automate,
since this is a one time job, once setup, always in place.

> and how to do the same thing on the secondary node so it does the
> mounting when taking over.

just put the symlink in place, and let heartbeat mount it on the same
mount point.

> 2.	A second question, in case you have an LVS with a pool of identical
> real servers that use drbd, I would like all real server to have the same
> image of the block device. The question is who to do the same steps on the
> real servers while they are all in secondary state to make use of the
> replicated data simultaneously.

I don't quite understand what you are asking for.
but just in case: DRBD is strictly between two nodes.
and at most one of them may access the data at any given time.

-- 
: Lars Ellenberg                                  Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
: Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://www.linbit.com :
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