[Linux-cluster] Multiple TCP/IP adresses for cman communication

[Maciej Bogucki]

Alain Richard napisał(a):
> Hi,
> 
> I am currently using a pretty common setup, using a two or more nodes
> cluster,  one or more iSCSI SANs, at least 3 gigabyte interfaces on each
> nodes (one for cluter member cman communication, and 2 for iSCSI
> communication) :
> 
> 
>     switch 1
>     |       |
> node 1      node 2
>  |   |      |   |
>  |   Switch 2   |
>  |     |        |
>  |    SAN       |
>  |     |        |
>  ———Switch 3----|
> 
> On each switches, I use a separate network :
> 
> 10.10.10.0/24 for switch 1, cman communication and for communicating
> with the rest of the world,
> 10.10.20.0/24 for switch 2 and first port of the SAN and nodes,
> 10.10.30.0/24 for switch 3 and second port of the SAN and nodes.
> 
> My SAN luns are multipathed on the nodes.
> 
> This setup works very well for me and I achieve both redundancy and load
> balancing for access from nodes to SAN.
> 
> I am using Centos 5 (RHEL 5) on the nodes and cman use the default
> configuration of using multicast on the switch 1 network.
> 
> I wonder if it is possible to make cman use the two other interfaces as
> well for its communications between cluster nodes ?



> 
> Doing so, I will be able to support the fail of any of the 3 switches
> without having the cluster members fenced in any way.

Yes, it is possible to do . Here is the answer
https://open.datacore.ch/DCwiki.open/Wiki.jsp?page=GFS.usage.txt

Best Regards
Maciej Bogucki