[Linux-cluster] CMAN nodes in different LANs

[Heiko Nardmann]

Sometimes I wonder whether an ML bot grepping for 'fencing' and
responding with something like 'Check fencing' might make sense ... ;-)

    Heiko

Am 17.10.2012 15:41, schrieb Digimer:
> On 10/17/2012 09:12 AM, Terance Dias wrote:
>> Hi,
>>
>> We're trying to create a cluster in which the nodes lie in 2 different
>> LANs. Since the nodes lie in different networks, they cannot resolve the
>> other node by their internal IP. So in my cluster.conf file, I've provided
>> their external IPs. But now when I start CMAN service, I get the following
>> error.
>>
>> NOTE: fencing is not shown, you must configure fencing appropriately for
>> your cluster.
> You do need fencing. Without *working* fencing, the first time something
> goes wrong, your cluster will hang (by design).
>
>> <cluster name="test-cluster" config_version="18">
>>   <!-- The cluster has 2 nodes. Each has a unique nodid and one vote
>>        for quorum. -->
>>   <clusternodes>
>>     <clusternode name="*external-ip-1*" nodeid="1"/>
>>     <clusternode name="*external-ip-2*" nodeid="2"/>
> You need to use names and these names need to resolve to an IP.
> Whichever interface that IP matches will be used for cluster
> communications. The ideal is to use `uname -n` from each node, though
> this is more convention that a requirement.
>