Installation guide

7.5.1. Adding Clust er Resources

You can configure two types of resources:

Global — Resources that are available to any service in the cluster. These are configured in the

resources section of the configuration file (within the rm element).

Service-specific — Resources that are available to only one service. These are configured in each

service section of the configuration file (within the rm element).

This section describes how to add a global resource. For procedures about configuring service-

specific resources, refer to Section 7.5.2, “Adding a Cluster Service to the Cluster”.

To add a global cluster resource, follow the steps in this section.

1. Open /etc/cl uster/cl uster.co nf at any node in the cluster.

2. Add a reso urces section within the rm element. For example:

<rm>

</resources>

</rm>

3. Populate it with resources according to the services you want to create. For example, here are

resources that are to be used in an Apache service. They consist of a file system (fs)

resource, an IP (i p) resource, and an Apache (apache) resource.

<rm>

<fs name="web_fs" device="/dev/sdd2"

mountpoint="/var/www" fstype="ext3"/>

<ip address="127.143.131.100" monitor_link="yes"

sleeptime="10"/>

<apache config_file="conf/httpd.conf"

name="example_server" server_root="/etc/httpd" shutdown_wait="0"/>

</resources>

</rm>

Example 7.9, “ cl uster. co nf File with Resources Added ” shows an example of a

cl uster.co nf file with the reso urces section added.

4. Update the confi g _versio n attribute by incrementing its value (for example, changing

from co nfi g _versi o n= "2" to co nfi g _versio n= "3").

5. Save /etc/cl uster/cl uster.co nf.

6. (O pti o nal ) Validate the file against the cluster schema (cl uster.rng ) by running the

ccs_co nfi g _val i d ate command. For example:

[root@ example-01 ~]# ccs_co nfi g _val i d ate

Configuration validates

Fencin g Configurat ion Examples

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