[DRBD-user] drbdmanage - 2 node configuration

Roland Kammerer roland.kammerer at linbit.com
Tue Nov 28 11:19:51 CET 2017

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

On Tue, Nov 14, 2017 at 05:50:08PM +0100, Marco Marino wrote:
> Hi,
> I'm trying to understand if it is possible to deploy a 2 node solution with
> drbd9/drbdmanage compatible with openstack-cinder-volume. Should I use 2 or
> 3 nodes with drbdmanage? It seems that, in a 2 node configuration, if one
> node goes down, drbdmanage becomes unstable ( please see
> https://lists.gt.net/drbd/users/28672 )

In a two node cluster both have to be up, otherwise really have to force
drbdmanage to do operations (that is intentional). In a 3 node setup one
can fail, the others still have quorum. That is something you have to

A common setup for openstack is 3 storage nodes and $N hypervisors that
act as drbdmange satellites/DRBD clients (without local storage, they
read/write data via the network).

HTH, rck

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