[Pacemaker] CMAN with multiple networks for HA communication

[Digimer]

Strictly speaking, it might be possible, but I haven't tried it myself 
and I certainly don't recommend it.

On 19/06/14 10:29 PM, Teerapatr Kittiratanachai wrote:
> Great, It work.
>
> Is it possible to use IP address as node name or altname?
> But I guess not.
>
> --Te
>
> On Thu, Jun 19, 2014 at 9:20 PM, Digimer <lists at alteeve.ca> wrote:
>> On 19/06/14 08:00 AM, Teerapatr Kittiratanachai wrote:
>>>
>>> Dear List,
>>>
>>> According to CMAN identify each node in cluster by hostname.
>>> So I configure the IP address in /etc/hosts file as below.
>>>
>>> ...
>>> 172.16.7.1    node00.example.com
>>> 172.16.7.2    node01.example.com
>>> ...
>>>
>>> So the corosync member show as below
>>>
>>> [root at node00 ~]# corosync-objctl | grep member
>>> runtime.totem.pg.mrp.srp.members.2.ip=r(0) ip(172.16.7.2)
>>> runtime.totem.pg.mrp.srp.members.2.join_count=1
>>> runtime.totem.pg.mrp.srp.members.2.status=joined
>>> runtime.totem.pg.mrp.srp.members.1.ip=r(0) ip(172.16.7.1)
>>> runtime.totem.pg.mrp.srp.members.1.join_count=1
>>> runtime.totem.pg.mrp.srp.members.1.status=joined
>>>
>>> My question is, is it possible to add more than one network for the HA
>>> communicate between these nodes?
>>> e.g. if 172.16.7.0/30 is down. And another network, which be main
>>> access network, still be up. the HA will use UP network to talk
>>> instead of the down one.
>>>
>>> Thank you in advance.
>>>
>>> Regards,
>>> Teerapatr Kittiratanachai (Te)
>>
>>
>> You're asking about setting up corosync's redundant ring protocol, correct?
>> If so, yes. You can use cman's 'altname' element to add a second name for
>> the node, and then have that name resolve to the network you want to use as
>> the backup link.
>>
>> --
>> Digimer
>> Papers and Projects: https://alteeve.ca/w/
>> What if the cure for cancer is trapped in the mind of a person without
>> access to education?
>>
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>
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-- 
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without 
access to education?