[Linux-cluster] [Openais] Newbie clustering questions

[Jan Friesse]

Per,

> Hi Jan
>
> Many thanks for your response.
>
> I spent some more time on this yesterday so I found out that the nodes
> needs really to have 2 nics, 2 ip's and the resource ip gets assigned to
> the node that becomes the running node.
>

You don't need two nics. Even tho it's better, because you have 
separated cluster traffic from app traffic.

> I have setup vmware fencing for each node, but I could not see anything in
> the configuration to allow or disallow one node to fence of the other or
> does this happen automagically? apologies if the question seem a bit stupid

Yes, it is happening automatically as long as you've configured fencing 
for every node.

> but 1 week ago I started this project with very little experience in
> clustering :)
>

That's why I'm recommending you to ask linux-cluster at redhat.com and read 
some docs 
(https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html-single/High_Availability_Add-On_Overview/index.html).

Regards,
   Honza

> Regards
> Per Qvindesland
>
>
> On Thu, Jun 5, 2014 at 9:36 AM, Jan Friesse <jfriesse at redhat.com> wrote:
>
>> Per,
>> it looks like none of your question is really corosync related (so I'm
>> CC'ing linux clustering <linux-cluster at redhat.com> (this is really
>> better list) but I will try to answer at least some of your questions.
>>
>>> Hi all
>>>
>>> I have redhat clustering running on a 3 VMware vm's 2 nodes and 1
>>> management server I can join the nodes without any problems but I got a
>>> couple of questions that I hope someone here can shed some lights on for
>> me.
>>>
>>> If I want to add a ip resource to the cluster must both nodes be
>> configured
>>> with a interface with that ip or is there a better way of doing it? If
>> not
>>
>> You must make sure that NO nodes has this address assigned. IPAddr
>> resource will take care to add ip to interface.
>>
>>> then can one of the nodes have the nic in standby?
>>>
>>
>> I don't think this is supported by any resource script.
>>
>>> How do I add fencing for a VMware vm's I notice that there is the VMware
>>> soa must the each vm be configured with its individual VMware soa fencing
>>> or is fencing not needed? From what I can read fencing is needed.
>>
>> Every node must be able to fence any other node. So you have to
>> configure fencing method for every node.
>>
>> In theory fencing is not needed as long as you are not using shared
>> storage, but it's still better to have it.
>>
>>>
>>> I am using Centos .6.5 with ESXI 4.1
>>>
>>> Many thanks for your time
>>>
>>> Regards
>>>
>>
>> Regards,
>>    Honza
>>
>>>
>>>
>>> _______________________________________________
>>> Openais mailing list
>>> Openais at lists.linux-foundation.org
>>> https://lists.linuxfoundation.org/mailman/listinfo/openais
>>>
>>
>>
>