[DRBD-user] DRBD9: full-mesh and managed resources

Adam Goryachev mailinglists at websitemanagers.com.au
Thu Aug 18 10:09:46 CEST 2016

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

On 18/08/2016 17:47, Roberto Resoli wrote:

> Hello,
> I'm currently running a three nodes cluster with drbd 9.0.3 and
> drbdmanage 0.97.
> It happens that in my setup i can dedicate two phisical interfaces per
> node to the storage network, and possibly create a "full mesh" network
> as of Chapter 5.1.4 of DRBD9 manual
> (http://drbd.linbit.com/doc/users-guide-90/ch-admin-manual#s-drbdconf-conns).
> The goal is to use only dedicated links (no network switch) for the
> storage network connections.
> I understand that this network topology is currently not supported by
> drbdmanage, and I'm asking if it would be possible to configure the
> three storage nodes as usual (one ip address per node) and change the
> configuration of the network connections afterwards.
> In particular I see that currently is not possible to dedicate an IP for
> every different link betwen a managed resource and its peer node.
> Am I wrong? Any advice/suggestion?
I can't comment on the DRBD related portions, but can't you add both 
interfaces on each machine to a single bridge, and then configure the IP 
address on the bridge. Hence each machine will only have one IP address, 
and the other machines will use their dedicated network to connect to 
it. I would assume the overhead of the bridge inside the kernel would be 
minimal, but possibly not, so it might be a good idea to test it out.


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