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RE: [Linux-cluster] RE: Alternative to Shared Storage..



Hi,

 

I attempted doing NFS setup.What I did is I have one more RHEL Machine where I ran the following command:

 

# vi /etc/exports

 

/datashare *(rw,sync,no_root_squash)

 

#service portmap restart

#service nfs restart

 

[root pe ~]# exportfs

/datashare      <world>

 

Is it fine?

 

Now, I went to the two nodes and tried :

 

[root 1014236106 ~]# showmount -e 10.14.236.169

Export list for 10.14.236.169:

/datashare *

[root 1014236106 ~]#

 

The Same Shared Being shown by the second Cluster Node.

 

Now I opened :

#system-config-cluster >   Went to Cluster Configuration > Add New Resource. Now I am confused.

 

There are three Options:

  1. NFS Mount
  2. NFS Exports
  3. NFS Client.

 

When I attempted doing NFS Exports , It just says NAME OF EXPORT CONFIGURATION…Whats That Now? Is it same as entry as /datashare.Or Otherwise Else?

 

I need to Choose NFS Mount or Exports or NFS Client.

 

Let me tell you the condition again.I have two Cluster Nodes and Am using NFS as Alternative Shared Storage.

 

 

Pls Help.


From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of P, Prakash
Sent: Wednesday, July 09, 2008 5:09 PM
To: linux clustering
Subject: RE: [Linux-cluster] RE: Alternative to Shared Storage..

 

You should create a directory in Spare server & export that directory as NFS Share. On the cluster nodes there should be an option to create NFS resource. This will mount the Shared directory in your cluster node. So you are going to use that exported directory as Share. Then if you wish you can copy the required scripts into that directory & run the scripts from there hence it will provide you the flexibility of failover & failback.

 


From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of Singh Raina, Ajeet
Sent: Wednesday, July 09, 2008 4:27 PM
To: linux clustering
Subject: FW: [Linux-cluster] RE: Alternative to Shared Storage..

 

 

Just for Information, How Will we configure NAS Concept you said earlier.

What Should I share actually?

Are you Talking about the Script?

 


From: Singh Raina, Ajeet
Sent: Wednesday, July 09, 2008 4:24 PM
To: 'linux clustering'
Subject: RE: [Linux-cluster] RE: Alternative to Shared Storage..

 

Hi,

 

I would like to go for iSCSI Configuration.That sound good.Atleast I will learn something new.

Can You provide me with steps by steps docs.

One more thing – What Minimum Size of Hard Disk we need for That?

 


From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of P, Prakash
Sent: Wednesday, July 09, 2008 3:40 PM
To: linux clustering
Subject: [Linux-cluster] RE: Alternative to Shared Storage..

 

Yes you can do with iSCSI. You need to install iSCSI software target on the spare RHEL machine & configure the disk space as virtual SCSI volume.

 

And on the both machines of the two node cluster you need to install iSCSI initiators establish iSCSI session with your target server & u can see the volume on both these servers.

 

If you are new to iSCSI & feel it takes more time. You can go for NAS, simply create a NFS share using the spare RHEL machine & export it to both the nodes of cluster. On Cluster nodes create some NFS resources for mounting the share automatically.

 

Regards,

Prakash

 


From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of Singh Raina, Ajeet
Sent: Wednesday, July 09, 2008 3:27 PM
To: linux-cluster redhat com
Subject: [Linux-cluster] Alternative to Shared Storage..

 

Hello Guys,

 

Just Now I have been successful in configuring the two Node Fail-over Cluster. It was tested on RHEL 4.0 U2.Now I have few queries and I know you people gonna help me out.Since This was small two Node Cluster Setup.I have few script which I am running on one primary server and on disabling Ethernet on one , the other is taking responsibility to start the same service plus rebooting the disabled system

That is working fine.

 

Now Let me tell you I don’t have Shared Storage.Is there any alternative for that.

Somewhere I read about iSCSI but donnno whether it will be helpful.

 

I have one RHEL System of 40 GB. Can I make it Shared Storage.

Its Just a matter of Testing a script.

Do Let me Know how gonna it be possible.Or Any Doc Which Talk about that?


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