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1.4. Cluster Configuration Considerations
When configuring a Red Hat High Availability Add-On cluster, you must take the following considerations into account:
- Red Hat does not support cluster deployments greater than 16 full cluster nodes. It is possible, however, to scale beyond that limit with remote nodes running the
pacemaker_remoteservice. For information on thepacemaker_remoteservice, see Section 8.4, “The pacemaker_remote Service”. - The use of Dynamic Host Configuration Protocol (DHCP) for obtaining an IP address on a network interface that is utilized by the
corosyncdaemons is not supported. The DHCP client can periodically remove and re-add an IP address to its assigned interface during address renewal. This will result incorosyncdetecting a connection failure, which will result in fencing activity from any other nodes in the cluster usingcorosyncfor heartbeat connectivity.