环境：Oracle 12.2.0.1 RAC
背景：用户反映12c ASM创建的用户具备sysasm权限，但无法在客户端连接到ASM实例，且没有报错。
1.ASM实例创建用户赋予sysasm权限
sqlplus / as sysasm
SQL> create user infa identified by infa;
User created.
SQL> grant sysasm to infa;
Grant succeeded.2.客户端tnsnames.ora配置
分别针对ASM实例1和实例2配置对应的信息：
ASM12c1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.90)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = +ASM)
(INSTANCE_NAME = +ASM1)
)
)
ASM12c2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.92)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = +ASM)
(INSTANCE_NAME = +ASM2)
)
)因为是12c版本，无需配置UR=A，关于UR=A可参考之前的测试：
3.客户端测试连接
客户端测试连接ASM12c1:
[oracle@db01 admin]$ sqlplus infa/infa@asm12c1 as sysasm
SQL*Plus: Release 11.2.0.4.0 Production on Wed Mar 13 22:45:53 2019
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
SQL> show parameter instance_name
NAME TYPE
------------------------------------ ----------------------
VALUE
------------------------------
instance_name string
+ASM1
SQL> exit
Disconnected from Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production客户端测试连接ASM12c2:
[oracle@db01 admin]$ sqlplus infa/infa@asm12c2 as sysasm
SQL*Plus: Release 11.2.0.4.0 Production on Wed Mar 13 22:46:19 2019
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
SQL> show parameter instance_name
NAME TYPE
------------------------------------ ----------------------
VALUE
------------------------------
instance_name string
+ASM2
SQL> 我测试是没有任何问题的，明天连接实际客户环境再进一步看具体情况。