[Linux-cluster] Trouble setting up a new cluster

[Dan Frincu]

Does you setup require multicast routing? Maybe the switches have 
multicast enabled, but aren't capable of running PIM-SM, PIM-DM or 
PIM-SM/DM or are not configured with support for this.

My 2 cents.

Todd Merritt wrote:
> And after several reboots, it's all online:
>
> [root at uaz-so-w52 ~]# clustat
> Cluster Status for SOA @ Fri Aug 27 12:21:09 2010
> Member Status: Quorate
>
>  Member Name                             ID   Status
>  ------ ----                             ---- ------
>  uaz-so-w52.mosaic.arizona.edu               1 Online, Local
>  uaz-so-w51.mosaic.arizona.edu               2 Online
>  /dev/mapper/soap1                           0 Online, Quorum Disk
>
>
> I've seen it show up all as online before briefly and then go offline.
> Any ideas what could cause this erratic behavior ?
>
> Todd
>
> On 08/27/2010 09:16 AM, Todd Merritt wrote:
>   
>> On 08/27/2010 08:46 AM, Jason_Henderson at Mitel.com wrote:
>>     
>>> linux-cluster-bounces at redhat.com wrote on 08/27/2010 11:28:27 AM:
>>>
>>>       
>>>> I'm trying unsuccessfully to set up a new cluster on redhat 5.  The
>>>> nodes seem to see each other, but they alway start up inquorate and
>>>> never join up.  I'm not sure what else I should be looking at.  Iptables
>>>> is not running.
>>>>
>>>> [root at uaz-so-w52 ~]# group_tool
>>>> type             level name       id       state
>>>> fence            0     default    00010001 none
>>>> [1]
>>>> dlm              1     clvmd      00020001 none
>>>> [1]
>>>> dlm              1     rgmanager  00030001 none
>>>> [1]
>>>>
>>>> [root at uaz-so-w51 ~]# group_tool
>>>> type             level name  id       state
>>>>
>>>> [root at uaz-so-w51 ~]# cman_tool nodes
>>>> Node  Sts   Inc   Joined               Name
>>>>    0   X      0                        /dev/mapper/soap1
>>>>    1   X      0                        uaz-so-w52.mosaic.arizona.edu
>>>>    2   M   7920   2010-08-26 10:04:51  uaz-so-w51.mosaic.arizona.edu
>>>>
>>>> [root at uaz-so-w52 ~]# cman_tool nodes
>>>> Node  Sts   Inc   Joined               Name
>>>>    0   M      0   2010-08-26 09:59:16  /dev/mapper/soap1
>>>>    1   M   7436   2010-08-26 09:59:04  uaz-so-w52.mosaic.arizona.edu
>>>>    2   X      0                        uaz-so-w51.mosaic.arizona.edu
>>>>
>>>> Any help would be greatly appreciated.
>>>>         
>>> Looks like they are each a member of their own cluster. Perhaps multicast 
>>> communication between the two nodes is not working. Are you using RedHat 
>>> 5.5?
>>>
>>>       
>> Yes, it's rh 5.5.  And multicast not working is the track I've been
>> running down.  Our network team tells me multicast is enabled within the
>> switch.  I had used ssmping to test multicast and it seemed to be
>> working.  I just ran it (ssmping) again, and if I start ssmpingd on node
>> 1 and run ssmping from node 2 it works fine.  If I start ssmpingd from
>> node 2 and run ssmping from node 1 I get connection refused errors from
>> ssmping.
>>
>> Thanks,
>> Todd
>>
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>> Linux-cluster at redhat.com
>> https://www.redhat.com/mailman/listinfo/linux-cluster
>>
>>     
>
> --
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>   

-- 
Dan FRINCU
Systems Engineer
CCNA, RHCE
Streamwide Romania

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