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Re: [Linux-cluster] Trouble setting up a new cluster



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 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 Mitel com wrote:
    
linux-cluster-bounces 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 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 uaz-so-w51 ~]# group_tool
type             level name  id       state

[root 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 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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