Re: help

[AKIN ÿffffffffffd6ZTOPUZ <akinoztopuz@xxxxxxxxx>]

Hello Emmanuel

 

nodes network is below:

 

-two nodes interconnect via cross cable

-1 interface for iscsi (logical volumes)

-1 interface for  public network

 

ı checked again physicall cables and not seen any problem 

From: emmanuel segura <emi2fast@xxxxxxxxx>
To: AKIN ÿffffffffffd6ZTOPUZ <akinoztopuz@xxxxxxxxx>; linux clustering <linux-cluster@xxxxxxxxxx>
Sent: Wednesday, May 30, 2012 11:00 AM
Subject: Re: help

Hello AKIN

Are you sure it's not a connection problem?

2012/5/30 AKIN ÿffffffffffd6ZTOPUZ <akinoztopuz@xxxxxxxxx>

Hello  Digimer

 

I am using qdisk with <quorumd interval="4" label="quorum" min_score="1" tko="15" votes="1" master_wins="1"/>

not heursitic.qdisk   is suggested for avoidin split brain

 

in this configuration my problem is :  node1 is master and continuosly node2 killed by node1

its connection is over iscsi.

ı thınk it is timing problem

doyou have any idea?

 

 

var/log/messages like that:

 

sapclsn2 clurgmgrd[8761]: <notice> Service service:sap is stopped
openais[6755]: [CMAN ] cman killed by node 1 because we were killed by cman_tool or other application 

openais[6755]: [SERV ] AIS Executive exiting (reason: CMAN kill requested, exiting). 
fenced[6788]: cluster is down, exiting

From: Digimer <lists@xxxxxxxxxx>
To: AKIN ÿffffffffffd6ZTOPUZ <akinoztopuz@xxxxxxxxx>; linux clustering <linux-cluster@xxxxxxxxxx>
Sent: Tuesday, May 29, 2012 10:46 PM
Subject: Re: help

On 05/29/2012 02:54 AM, AKIN ÿffffffffffd6ZTOPUZ wrote:
>    Hello
> 
> I need configuration steps about 2 nodes  rhel(5) cluster with quorum disk .
> 
> my config  like that  :
> 
> each node has 1 vote
> quorum disk has 1 vote
> cman expected vote is 3
> quorum will be protected in 2 votes  so when one node is down cluster
> will be up
> 
> whats other things should I care about it  in cluster config?
> 
> thanks in advance

First off, I *strongly* recommend using RHEL6, not 5. There have been
many improvements, plus, EL6 will be supported longer.

What are you trying to do with your cluster? I suspect that a quorum
disk is not necessary, though if you have a SAN anyway, I wouldn't argue
against using it. Unless you need the heuristics though, it's probably
not needed. You can safely build a 2-node cluster, you just need to make
sure your fence devices work (which is needed, regardless).

I have a tutorial that shows how to implement a cluster using cman,
clvmd and other components. It also discusses the cluster components
from a high-level, which may help.

https://alteeve.com/w/2-Node_Red_Hat_KVM_Cluster_Tutorial

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