[Linux-cluster] Clarifications needed on Setting up a two node HA cluster

Zama Ques queszama at yahoo.in
Tue Jun 26 14:36:39 UTC 2012

Hi ,

I need to setup a two node HA cluster on top of HP blade servers using Redhat Cluster Solution.  I have started going through the docs and have the following  doubts as of now. 

I am planning to build my two node setup based on the following architecture as shown in Fig 1.1 in http://www.centos.org/docs/5/pdf/Cluster_Administration.pdf 

As per t'he above fig, I am planning to build my setup as per the following .

1) Each of the nodes will have two interfaces. One interface say eth0 on both the nodes will be assigned private addresses and 
    will be connected to a switch which will be used for cluster traffic.The other interface on both the nodes say eth1 will be 
    assigned public ip address and will be connected to another switch which is connected to internet via a firewall/router . I 
    will also be assigning a virtual public ip address to the cluster by configuring a ip resource in conga. This ip address I 
   will add it to  Listen directive in apache configuration file  so that apache listens on this ip address only to serve client 
    requests. This ip address will also resolve to a registered domain name for our portal which we are going to serve by this 

   And as a prerequisite for conga setup , I will update /etc/hosts on both nodes by supplying FQDNs 
   corresponding to private ip address assigned earlier on eth0 on both the nodes. 
2) Regarding storage , I am not sure as of now what kind of storage device will be used . If it is not a SAN storage 
than I will  configure one of the partitions on the storage as iscsi target and will share it to both the cluster nodes. 
From both the cluster nodes , I will create volumes using clvm and will use GFS on top of it as file system . 

3)Regarding cluster resource , we will be using apache as one of the resource to serve http traffic. Will configure apache
using Conga and after configuration is done , will copy the httpd config file manually to the other cluster node . Will not 
start apache service on both cluster nodes and will leave it to cluster software to start services . Will also do chkconfig 
httpd off on both the nodes and will also not update /etc/fstab with the GFS file system leaving it to cluster node to handle 
mounting of a file system.

Sorry for writing too lenghthy  , but want to clear my doubts before starting up. 

Will be very much grateful if members can read my long mail with patience and reply back whether I am going in the right direction. 

Thanks in Advance
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