KfWiki: OCFS2

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OCFS2

Get packages from if not available from repo
ocfs2 kernel package - http://oss.oracle.com/projects/ocfs2/files/
ocfs2-tools - http://oss.oracle.com/projects/ocfs2-tools/files/

Create ocfs2 config

Node name must match with hostname

/etc/ocfs2/cluster.conf

node:

    ip_port = 7777

    ip_address = 10.0.0.20

    number = 0

    name = vlinux32

    cluster = ocfs2

node:

    ip_port = 7777

    ip_address = 10.0.0.26

    number = 1

    name = vlinux-i2

    cluster = ocfs2

cluster:

    node_count = 2

    name = ocfs2

Configure cluster service

/etc/init.d/o2cb configure

Poor man's shared storage

One can use a shared vmdk file on ESX servers as shared storage.

Configure the shared vmdk file as SCSI 1:x (OS on SCSI 0:x). An additional SCSI controller will be added. From the properties of that new SCSI controller, select "Virtual" such that the vmdk file can be shared among guests. Then you need to create a vmdk file on the console with the thick option.

On ESX, one should be able to enable that option by:

vmkfstools -a lsilogic -d thick -c 250000m /vmfs/volumes/FileStore/fs/fs-home.vmdk

If you are even lower on budget and ends up with an ESXi server, this will require additional work. Running concole commands on ESXi server: Go to the console of the box or put a kvm on, at the yellow screen, press ALT-F1 then enter "unsupported". You will get a password prompt where you can login with your root password. Ref: http://forum.advance.homelinux.net/index.php?topic=8172.0 will try it out tomorrow.

Prepare the ocfs2 partition

This should be done to a shared storage, and be done from one node only. I'm trying to see if it is possible to use VMWare's vmdk file as a shared storage. So far out of luck :(

fdisk /dev/sdb
mkfs.ocfs2 /dev/sdb1

Prepare fstab

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

Start o2cb, ocfs2

chkconfig o2cb on
chkconfig ocfs2 on
service o2cb start
service ocfs2 start

KfWiki : FileSystemOCFS2