From your descriptions of the problem it sounds like your server-one which binds to port 8080 doesn't have keycloak-server configured at all - it's using a server group, that uses a different profile than the one you configured.
GROUP | SERVER | PROFILE |
configuration | configuration-server-demosetup | idbt-ha |
authentication | authentication-server-demosetup | idbt-ha |
There are four profiles in the default domain.xml - default, ha, full, and full-ha
If you want your multiple Keycloak instances to run in high availability mode, using a shared Infinispan cache, and a shared database, then that's the most complex of all configurations - you have to setup a standalone database, use "full-ha" profile to configure the datasource with proper database connection url, and configure the distributed Infinispan cache. Also add <subsystem xmlns="urn:jboss:domain:keycloak-server:1.1"> declaration.
In server-groups section define a new group or reuse existing one, and set its profile to "full-ha", and use "full-ha-sockets" binding group.In host.xml make sure that server definitions have the proper group set.Then you also have to copy some configurations.Assuming you have two servers defined in host.xml - called server-one, and server-two, create a directory:$WILDFLY_HOME/domain/servers/server-one/configuration$WILDFLY_HOME/domain/servers/server-two/configurationThen copy the following configurations from standalone/configuration:cp $WILDFLY_HOME/standalone/configuration/keycloak-server.json $WILDFLY_HOME/domain/servers/server-one/configuration/cp -r $WILDFLY_HOME/standalone/configuration/themes $WILDFLY_HOME/domain/servers/server-one/configuration/cp -r $WILDFLY_HOME/standalone/configuration/providers $WILDFLY_HOME/domain/servers/server-one/configuration/cp $WILDFLY_HOME/standalone/configuration/keycloak-server.json $WILDFLY_HOME/domain/servers/server-two/configuration/cp -r $WILDFLY_HOME/standalone/configuration/themes $WILDFLY_HOME/domain/servers/server-two/configuration/cp -r $WILDFLY_HOME/standalone/configuration/providers $WILDFLY_HOME/domain/servers/server-two/configuration/