How to match the IP of the configuration file of MySQL router with two masters and one slave

generally speaking, mysqlrouter is one master and two slaves, so can two masters and one slave MySQL work? how do you write ip?

Mar.20,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bf5f72-31319.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf5f72-31319.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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