1.3.4. Cluster Configuration System

1.3.4. Cluster Configuration System

The Cluster Configuration System (CCS) manages the cluster configuration and provides configuration information to other cluster components in a Red Hat cluster. CCS runs in each cluster node and makes sure that the cluster configuration file in each cluster node is up to date. For example, if a cluster system administrator updates the configuration file in Node A, CCS propagates the update from Node A to the other nodes in the cluster (refer to Figure 1.8, “CCS Overview”).

CCS Overview

Figure 1.8. CCS Overview

Other cluster components (for example, CMAN) access configuration information from the configuration file through CCS (refer to Figure 1.8, “CCS Overview”).

Accessing Configuration Information

Figure 1.9. Accessing Configuration Information

The cluster configuration file (/etc/cluster/cluster.conf) is an XML file that describes the following cluster characteristics:

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