Red Hat GLOBAL FILE SYSTEM 5.0 Instrukcja Użytkownika Pobierz pdf (Strona 24)

Deploying a Data Sharing Cluster

Creating and Configuring a Data Sharing Cluster

Before creating and configuring a data sharing cluster, enable the cluster mode on all cluster nodes

and make sure that the vz and parallels-server services are stopped:

# prlsrvctl set --cluster-mode on

# service vz stop

# service parallels-server stop

Creating the Cluster

Now you can start creating the data sharing cluster. The example below demonstrates how to set

up a new cluster using the ccs_tool command-line tool. Using this tool, you can create two

types of data sharing clusters:

• Active/passive clusters. An active/passive cluster includes both active and passive nodes. In

this type of cluster, a passive node is used only if one of the active nodes fails.

• Active/active clusters. An active/active cluster consists of active nodes only, each running the

Parallels Server Bare Metal software and hosting a number of virtual machines and Containers.

In the event of a failover, all virtual machines and Containers running on the problem node are

failed over to one of the healthy active nodes.

The process of creating both types of clusters is almost identical and is described below:

1 Log in to any of your cluster nodes, and create a configuration file for the cluster, for example:

# ccs_tool create psbmCluster

This command creates a new configuration file for the psbmCluster cluster with the default

path /etc/cluster/cluster.conf.

2 Set fence devices for the cluster. The example below uses the apc network power switch as

the fencing device:

# ccs_tool addfence apc fence_apc ipaddr=apc.server.com login="user1"

passwd="XXXXXXXX"

For detailed information on fence device parameters, see the Cluster Administration guide at

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux.

Note: Manual fencing is supported for testing purposes only and is not recommended for use in

production

3 Add all Parallels servers to the cluster. For example, to add the psbmNode server to the cluster,

execute this command:

# ccs_tool addnode psbmNode1 -n 1 -v 1 -f apc port=1

where

• -n specifies the ID that will uniquely identify the node among other nodes in the cluster.

Each node in the cluster must have its own unique port ID.

• -v denotes the number of votes for the psbmNode server. You can use 1 as the default

vote number and change it later on, if necessary.

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Red Hat GLOBAL FILE SYSTEM 5.0 Instrukcja Użytkownika Strona 24