Red Hat GLOBAL FILE SYSTEM 5.0 Manual do Utilizador descarregar pdf (Página 23)

Deploying a Data Sharing Cluster

As a result of the aforementioned command, a new GFS file system with the gfs2 name for the

psbmCluster cluster will be created. The file system will use the lock_dlm protocol, contain

4 journals, and reside on the /vg01/lv01 volume.

4 Make sure that the created logical volumes can be accessed by all servers in the cluster. This

ensures that the clustering software can mount the /vz partition that you will create on the

logical volume in the next step to any of your cluster nodes.

5 Tell the node to automatically mount the /vz partition on the node boot. To do this, add the

/vz entry to the /etc/fstab file on the node. Assuming that your GFS file system resides on

the /vg01/lv01 logical volume, you can add the following entry to the fstab file:

/dev/vg01/lv01 /vz gfs2 defaults,noatime 0 0

If you use LVM on a GFS filesystem over a partition provided via the iSCSI protocol, you need to

define the extra option _netdev in /etc/fstab in the order LVM tools search for the

volumes after network filesystems are initialized.

/dev/vg01/lv01 /vz gfs2 defaults,noatime,_netdev 0 0

Also make sure that the netfs service is enabled by default.

# chkconfig netfs on

6 Configure the gfs2 service on the node to start in the default runlevel. You can enable the

gfs2 service by executing the following command on each of the cluster nodes:

# chkconfig --level 3 gfs2 on

7 Enable the cluster mode, and stop the vz, parallels-server, and PVA Agent services:

# prlsrvctl set --cluster-mode on

# service vz stop

# service parallels-server stop

# service pvaagentd stop

# service pvapp stop

8 Move /vz to a temporary directory /vz1, and create a new /vz directory:

# mv /vz /vz1; mkdir /vz

Later on, you will mount a shared data storage located on a GFS volume to the created /vz

directory and move there all data from the /vz1 directory.

Configuring the Data Storage for Other Nodes in the Cluster

To configure the shared data storage for the second and all remaining nodes in the cluster, do the

following:

1 Tell each node in the cluster to automatically mount the /vz partition on the node boot. To do

this, add the /vz entry to the /etc/fstab file on each node in the cluster. Assuming that your

GFS file system resides on the /vg01/lv01 logical volume, you can add the following entry to

the fstab file:

/dev/vg01/lv01 /vz gfs2 defaults,noatime 0 0

2 Configure the gfs2 service on each node in the cluster to start in the default runlevel. For

example, if your system default runlevel is set to 3, you can enable the gfs2 service by

executing the following command on each of the cluster nodes:

# chkconfig --level 3 gfs2 on

1 2 ... 18 19 20 21 22 23 24 25 26 27 28

Sem comentários

Red Hat GLOBAL FILE SYSTEM 5.0 Manual do Utilizador Página 23