[Pacemaker] CMAN with multiple networks for HA communication

Fri Jun 20 03:33:06 UTC 2014

For IP address issue, I will find about that concern and take
responsibility on risk for now.

For multiple altname's, as I found in
http://rpm.pbone.net/index.php3/stat/45/idpl/8711809/numer/5/nazwa/cman
it said that

>
> Multi-home configuration .... Up to 9 altnames (10 interfaces in total) can be used.
>

Is that the old document?

On Fri, Jun 20, 2014 at 10:27 AM, Digimer <lists at alteeve.ca> wrote:
> Using raw IPs is not recommended. I remember Chrissie explaining the reason
> why a couple of years ago, but I can't remember that reasoning right not.
>
> As for multiple altname's, that is not possible. Corosync's RRP (redundant
> ring protocol) supports a primary and backup ring only.
>
> digimer
>
>
> On 19/06/14 11:24 PM, Teerapatr Kittiratanachai wrote:
>>
>> I just already try this. It work !!
>> I don't understand that why there is no example in the Internet using
>> IP address as node name or altname.
>>
>> But I cann't add more than one altname, can you give me the xml
>> example or the ccs command ?
>>
>> Thanks
>> --Te
>>
>> On Fri, Jun 20, 2014 at 9:56 AM, Digimer <lists at alteeve.ca> wrote:
>>>
>>> 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?
>>>>>
>>>>> _______________________________________________
>>>>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>>>>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>>>>
>>>>> Project Home: http://www.clusterlabs.org
>>>>> Getting started:
>>>>> http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>>>>> Bugs: http://bugs.clusterlabs.org
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>>
>>>> Project Home: http://www.clusterlabs.org
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>>>> Bugs: http://bugs.clusterlabs.org
>>>>
>>>
>>>
>>> --
>>> 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?
>>>
>>> _______________________________________________
>>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>>
>>> Project Home: http://www.clusterlabs.org
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>>> Bugs: http://bugs.clusterlabs.org
>>
>>
>> _______________________________________________
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>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs: http://bugs.clusterlabs.org
>>
>
>
> --
> 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?
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org