Subordinate WildFly Host Controller Post-Install Configuration
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Internal
Specify the Domain Controller
host.xml Host Name
A subordinate host controller does not need to expose its management interface. However, it needs to know the coordinates of the domain controller(s) it will connect to. This is done by setting the values of jboss.domain.master.address and jboss.domain.master.port in its $JBOSS_HOME/bin/domain.conf:
HOST_CONTROLLER_JAVA_OPTS="${HOST_CONTROLLER_JAVA_OPTS} -Djboss.domain.master.address=1.2.3.4 -Djboss.domain.master.port=9990"
For more details see WildFly System Properties#jboss.domain.master.address and WildFly System Properties#jboss.domain.master.port.