port	protocol	bind_scope	allowed_sources	purpose
3306	tcp	node-ip	nginx01,nginx02,mysql-peer,management	MySQL5.6 data and replication
3308	tcp	node-ip	nginx01,nginx02,mysql-peer,management	MySQL8.0 data and replication
9201	tcp	node-ip	nginx01,nginx02	MySQL5.6 HA health
9202	tcp	node-ip	nginx01,nginx02	MySQL8.0 HA health