#nacos dev env PREFER_HOST_MODE=hostname NACOS_SERVERS=nacos1:8848 nacos2:8848 nacos3:8848 MYSQL_MASTER_SERVICE_HOST=mysql-master MYSQL_MASTER_SERVICE_DB_NAME=nacos_devtest MYSQL_MASTER_SERVICE_PORT=3306 MYSQL_SLAVE_SERVICE_HOST=mysql-slave MYSQL_SLAVE_SERVICE_PORT=3306 MYSQL_MASTER_SERVICE_USER=nacos MYSQL_MASTER_SERVICE_PASSWORD=nacos