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4.3. Adding a New Cluster Node

4.3.1. Corosync

Adding a new is as simple as installing Corosync and Pacemaker, and copying /etc/corosync/corosync.conf and /etc/ais/authkey (if it exists) from an existing node. You may need to modify the mcastaddr option to match the new node's IP address.
If a log message containing "Invalid digest" appears from Corosync, the keys are not consistent between the machines.