OCFS2 Configuration

OCFS Configuration

OCFS related rpms are now available with Oracle Linux CD

Install the following

rpm –Uvh ocfs2-2.6.9-22.EL-1.2.1-1.i686.rpm \

           ocfs2console-1.2.1-1.i386.rpm \

           ocfs2-tools-1.2.1-1.i386.rpm \

           ocfs2-tools-debuginfo-1.2.1-1.i386.rpm

Run the below command it will open the window to add nodes –

$ ocfs2console 

Select the "Cluster > Configure Nodes..." menu option and ignore the subsequent information message by clicking the "Close" button.

You may get the message to startup ocfs on startup/boot

On the "Node Configuration" screen add the nodes and click on apply.

You may get the error for configuration.. It might be because of the hostname misconfiguration

You would require to delete the cluster config file in /etc/ocfs2/cluster.conf

Can be done as follows:-

$/etc/init.d/ocfs2 stop

$/etc/init.d/o2cb offline ocfs2

$/etc/init.d/o2cb unload

$rm –f /etc/ocfs2/cluster.conf

$/usr/sbin/ocfs2console &

Now follow the above steps again to add nodes.

Edit /etc/init.d/o2cb script and delete the following lines.

### BEGIN INIT INFO

## Provides: o2cb

## Required-Start: $network

## Should-Start:

## Required-Stop:

## Default-Start: 2 3 5

## Default-Stop:

## Description: Load O2CB cluster services at system boot.

### END INIT INFO

Reregister the o2cb using below commands:-

$chkconfig - - del o2cb

$chkconfig - - add o2cb

$chkconfig - - list o2cb

o2cb            0:off   1:off   2:on    3:on    4:on    5:on    6:off

$

Now configure the o2cb using the below command:-

$/etc/init.d/o2cb offline ocfs2

$/etc/init.d/o2cb unload

$/etc/init.d/o2cb configure

Other commands:-

• "/etc/init.d/o2cb load" - Loads all OCFS2 modules.
• "/etc/init.d/o2cb online" - Brings the cluster online.
• "/etc/init.d/o2cb offline" - Takes the cluster offline.
• "/etc/init.d/o2cb unload" - Unloads all OCFS2 modules.

Partion the available disks using fdisk

Options can be choosed as n, 1, Enter, Enter and w to write the partition table.

Start the OCFS2CONSOLE

Format the disk from the task menu… names can be given as per choice.

And then mount the disks by clicking on mount icon.

To make the persistent mounting of the file system make an entry in the file /etc/fstab on all nodes.

/dev/sdb1     /u02    ocfs2   _netdev,datavolume     0 0

Filesystem should be available on all nodes.