[Linux-cluster] RE: NFS Issue in Cluster??

Singh Raina, Ajeet ajeet.singh.raina at logica.com
Thu Aug 14 13:14:27 UTC 2008

Just be more Clear,

I have two Cluster Nodes: Edwin1 and Edwin2.
Edwin2 is NFS Server while Edwin1 is NFS Client.
Anyway,NFS will be running on Active/Active ie both are running NFS

On Edwin2 we can see the following configuration:

# df -h on /var/tmp/kunal type nfs
/dev/sdj1 on /usr/bang-test type ext3 (rw)

[[[[Note: As for Now /dev/sdj1 which is a shared storage partition is
right now mounted on 
Edwin2.As We do Clusvcadm -r bang -m edwin1 command,it will relocate to
edwin1 node.]]]

I have mounted /usr/bang-test/xml to /var/tmp/kunal as seen above.
Corresponding to that I made the entry under NFS Mount on LUCI as:

NFS Mount Resource Configuration

Name  --->  NFSMount   
Mount point   ---> /var/tmp/kunal
Host   -->
Export path   -->
NFS version NFS3 -> <Default>


On Edwin1 Now, The mount point /dev/sdj1 couldnt be seen.(After failover
it will be seen)

#df -h
                      206G  360M  195G   1% /var/tmp/kunal

Now When I have written another Service Script called bang which mean
now I have two Script 
in hand.I have added both to the cluster.

As you see output of Clustat:


edwin2# clustat
Member Status: Quorate

  Member Name                              Status
  ------ ----                              ------
  edwin1-cluster                           Online, rgmanager
  edwin2-cluster                           Online, Local, rgmanager

  Service Name         Owner (Last)                   State
  ------- ----         ----- ------                   -----
  bang                 edwin2-cluster                 started
  NFSCluster           edwin1-cluster                 started

So Now Both the service are added.When I now perform failover it doesnt
appear working.
Is there anything mischievious I am doing?

Pls Advise

From: Singh Raina, Ajeet 
Sent: Thursday, August 14, 2008 6:03 PM
To: 'linux clustering'
Cc: 'piyush yaduvanshi'
Subject: NFS Issue in Cluster??

Hello Guys,

I have a doubt and I hope you people gonna Help me with.
I have been stucked with including NFS Resource and Services.
Let me tell you....I want to run NFS Service on one of the red hat
cluster node .ON failover to the second cluster node the NFS should come
But I donno why the way to configure that has been so complicated
All I can see is:

1.	NFS Mount 
		Name - Create a symbolic name for the NFS mount. 
		Mount Point - Choose the path to which the file system
resource is mounted. 
		Host - Specify the NFS server name. 
		Export Path - NFS export on the server. 
		NFS version - Specify NFS protocol: 
o	NFS3 - Specifies using NFSv3 protocol. The default setting is
o	NFS4 - Specifies using NFSv4 protocol. 
		Options - Mount options. For more information, refer to
the nfs(5) man page. 
		Force Unmount checkbox - If checked, forces the file
system to unmount. The default setting is unchecked. Force Unmount kills
all processes using the mount point to free up the mount when it tries
to unmount. 
			NFS Client 
		Name - Enter a name for the NFS client resource. 
		Target - Enter a target for the NFS client resource.
Supported targets are hostnames, IP addresses (with wild-card support),
and netgroups. 
		Options - Additional client access rights. For more
information, refer to the exports(5) man page, General Options 
				NFS Export 
		Name - Enter a name for the NFS export resource. 
Please Help me understanding what's the difference between NFS Mount,NFS
Export and NFS Client in this context.
I just want to do failover ie. When one node has NFS running then on
being stopped NFS Should be starting at the other end.

Pls Help

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