有个12.2集群环境，需要添加一个实例，直接图形化启动dbca，第四步时只能发现本机，无法识别到另外一个节点，如下图
通过排查发现是oracle用户的密码过期了，细节如下
[root@hydb1 ~]# su - grid
Last login: Wed Jun 28 17:28:31 CST 2023 on pts/1
+ASM1:/home/grid@hydb1> ssh hydb2
You are required to change your password immediately (password aged)
You are required to change your password immediately (password aged)
Last login: Thu Sep 1 21:16:35 2022
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for user grid.
Changing password for grid.
(current) UNIX password: Connection to hydb2 closed.
+ASM1:/home/grid@hydb1> exit
logout
[root@hydb1 ~]# su - oracle
Last login: Wed Jun 28 17:24:47 CST 2023 on pts/1
orcl1:/home/oracle@hydb1> ssh hydb2
You are required to change your password immediately (password aged)
You are required to change your password immediately (password aged)
Last login: Mon Aug 15 17:10:01 2022
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for user oracle.
Changing password for oracle.
(current) UNIX password: Connection to hydb2 closed.
[root@hydb1 ~]# chage -l oracle
Last password change : Feb 28, 2022
Password expires : May 29, 2022
Password inactive : never
Account expires : never
Minimum number of days between password change : 0
Maximum number of days between password change : 90
Number of days of warning before password expires : 7
处理办法，把原来的密码重新配置下就可以，不需要再次配置互信
