tnb0/ha/mysql80/conf/mysqlrouter.conf

[DEFAULT]
logging_folder=/var/log/mysqlrouter
runtime_config_folder=/var/lib/mysqlrouter

[routing:bootstrap_rw]
bind_address=0.0.0.0:6446
destinations=mysql80-1:3306,mysql80-2:3306,mysql80-3:3306
routing_strategy=first-available

[routing:bootstrap_ro]
bind_address=0.0.0.0:6447
destinations=mysql80-1:3306,mysql80-2:3306,mysql80-3:3306
routing_strategy=round-robin