[Pacemaker] CMAN with multiple networks for HA communication

Fri Jun 20 16:16:34 UTC 2014

Noted, and thank you for your confirmation.

--Te

On Fri, Jun 20, 2014 at 2:49 PM, Christine Caulfield
<ccaulfie at redhat.com> wrote:
> On 20/06/14 04:33, Teerapatr Kittiratanachai wrote:
>>
>> 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?
>>
>
>
> It's a current document (based on cman.5 in the distribution) but it is
> actually very wrong. corosync only supports a maximum of 2 interfaces -
> that's 1 only altname!
>
> Chrissie
>
>
>
>> 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
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> 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
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> 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
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> 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
>>>>
>>>
>>>
>>> --
>>> 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
>>
>>
>> _______________________________________________
>> 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
>>
>
>
> _______________________________________________
> 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