Re: Two clusters in the network with same "name" in cluster.conf
|[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]|
if you RAELLY need two clusters with the same name on the same subnet,
then try to adjust the following parameters and use unique values for
/Multicast network configuration/
cman uses multicast UDP packets to communicate with other nodes in
the cluster. By default it will generate a multicast address using
239.192.x.x where x.x is the 16bit cluster ID number split into
bytes. This, in turn is generated from a hash of the cluster name
though it can be specified explicitly. The purpose of this is to
allow multiple clusters to share the same subnet - they will each
use a different multicast address. You might also/instead want to
isolate clusters using the port number as shown above.
It is possible to override the multicast address by specifying it in
cluster.conf as shown:
<cman> <multicast addr="126.96.36.199"/> </cman>
The cluster ID number is used to isolate clusters in the same
subnet. Usually it is generated from a hash of the cluster name, but
it can be overridden here if you feel the need. Sometimes cluster
names can hash to the same ID.
<cman cluster_id="669"> </cman>
On 03/28/2012 09:14 AM, Parvez Shaikh wrote:
> Hi experts,
> I am running in to a problem in a situation where two clusters in the
> network have same name.
> Node A, Node B : cluster name CLUSTER
> Node C, Node D : cluster name CLUSTER
> Node C and Node D's cluster is running fine however when I start node
> A it copies /etc/cluster.conf (I believe ccsd) from either C and D and
> replaces its own and start attempting a cluster, of course it fails
> because C or D is not a host name of node A.
> Is it possible to have more than one clusters in same network, these
> nodes are in IBM blades hosted in Bladecenter and the heart beat IPs
> are on private network.
> Linux-cluster mailing list
Linux-cluster mailing list
-- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster