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Chapter 4. Cluster Nodes

4.1. Defining a Cluster Node
4.2. Describing a Cluster Node
4.3. Adding a New Cluster Node
4.3.1. Corosync
4.3.2. Heartbeat
4.4. Removing a Cluster Node
4.4.1. Corosync
4.4.2. Heartbeat
4.5. Replacing a Cluster Node
4.5.1. Corosync
4.5.2. Heartbeat

4.1. Defining a Cluster Node

Each node in the cluster will have an entry in the nodes section containing its UUID, uname and type.
  <node id="1186dc9a-324d-425a-966e-d757e693dc86" uname="pcmk-1" type="normal"/>
Example 4.1. Example cluster node entry

In normal circumstances, the admin should let the cluster populate this information automatically from the communications and membership data. However one can use the crm_uuid tool to read an existing UUID or define a value before the cluster starts.