You only need 1 publisher per cluster. Your subscriber(s) provide fault tolerance for the publisher. Please see the IPT SRND below and specifically the Cisco Callmanager Publisher section. The publisher contains the only read/write copy of the database, so database changes cannot be made during an outage. The Cisco Callmanager Publisher section in the link below lists the functions that will not work if the publisher is down. Normal call processing will continue.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.