[DRBD-user] Re: Just making sure DRBD is the right project for me... ; -)

[Evert Meulie]

http://linux-vserver.org/Vserver+DRBD looks promising, since 90% of the changes will be made in the vservers on the node

The HowTo tells how to give a vserver its own partition, and use drbd to keep this in sync over 2 nodes.

Would it also work to mount the DRBD device as /var/lib/vservers, instead of /var/lib/vservers/<vserver-name> , and hereby take all vservers in 1 go?


Regards,
	Evert



Helmut Wollmersdorfer wrote:
> Evert Meulie wrote:
> 
>> Now I would like to use DRBD to make these 2 systems completely 
>> identical to each other, including root & boot partitions. Can DRBD 
>> help me out here?   8-)
> 
> 
> 'Completely' is not possible, and I would not like it.
> 
> Think about the content of /proc, or hardware/kernel related messages in 
> /var/log.
> 
> The only possibility (which I know) to fully sync a root / is, to run it 
> as a guest in XEN or vserver. This means having DRBD and the cluster 
> manager running in the host, and booting the guest at failover.
> 
> See
> http://linux-vserver.org/Vserver+DRBD
> http://lists.xensource.com/archives/html/xen-users/2005-06/msg00215.html
> 
> IMHO there should be a serious need for virtualization. Just syncing the 
> installed packages and the configuration is _not_ a serious reason.
> 
> Helmut Wollmersdorfer