Oracle同一个IP端口监听多个数据库实例

心已赠人 2021-12-11 08:21 1005阅读 0赞

Oracle 11g配置数据库同一个IP和端口来监听多个数据库实例，我需要监听orcl和orcl002两个数据库实例，参考过程如下。

$ find $ORACLE\_HOME -name listener.ora  
/opt/oracle/product/11.2.0/network/admin/samples/listener.ora  
/opt/oracle/product/11.2.0/network/admin/listener.ora  
$ vim $ORACLE\_HOME/network/admin/listener.ora

1，修改监听器配置，增加监听的SID\_LIST，如果有多个SID，就需要再SID\_LIST中指定多个SID\_DESC。默认配置中无SID\_LIST，手动添加下面蓝色部分内容：  
\# listener.ora Network Configuration File: /opt/oracle/product/11.2.0/network/admin/listener.ora  
\# Generated by Oracle configuration tools.

LISTENER =  
  (DESCRIPTION\_LIST =  
    (DESCRIPTION =  
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))  
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))  
    )  
  )

SID\_LIST\_LISTENER =  \#命名规则为SID\_LIST\_+上面定义的监听器名称。该段用于定义监听器的服务即为哪些数据库实例提供监听服务  
  (SID\_LIST =  
     (SID\_DESC =  
       (GLOBAL\_DBNAME = orcl002)  \#数据库名  
       (SID\_NAME = orcl002)  \#数据库实例名  
     )  
     (SID\_DESC =  
       (GLOBAL\_DBNAME = orcl)  
       (SID\_NAME = orcl)  
     )  
  )

ADR\_BASE\_LISTENER = /opt/oracle

2，修改tnsnames.ora文件，添加SID：  
$ find $ORACLE\_HOME/ -name tnsnames.ora  
/opt/oracle/product/11.2.0/network/admin/samples/tnsnames.ora  
/opt/oracle/product/11.2.0/network/admin/tnsnames.ora  
$ vim $ORACLE\_HOME/network/admin/tnsnames.ora

修改文件内容如下，添加SID：  
\# tnsnames.ora Network Configuration File: /opt/oracle/product/11.2.0/network/admin/tnsnames.ora  
\# Generated by Oracle configuration tools.

ORCL002 =  
  (DESCRIPTION =  
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))  
    (CONNECT\_DATA =  
      (SERVER = DEDICATED)  
      (SERVICE\_NAME = orcl002)  
    )  
  )

ORCL =  
  (DESCRIPTION =  
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))  
    (CONNECT\_DATA =  
      (SERVER = DEDICATED)  
      (SERVICE\_NAME = orcl)  
    )  
  )

注意：  
1）要确保在监听文件listener.ora中也有对应的一个ADDRESS项也包含同样的三个子参数并且子参数的值对应都相等  
2）这里SERVICE\_NAME的值必需确保与监听文件listener.ora中某SID\_DESC项下的SID\_NAME参数的值相等

\[oracle@localhost 11.2.0\]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 09-JUL-2019 21:02:08

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))  
STATUS of the LISTENER  
\------------------------  
Alias                     LISTENER  
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production  
Start Date                09-JUL-2019 21:01:56  
Uptime                    0 days 0 hr. 0 min. 11 sec  
Trace Level               off  
Security                  ON: Local OS Authentication  
SNMP                      OFF  
Listener Parameter File   /opt/oracle/product/11.2.0/network/admin/listener.ora  
Listener Log File         /opt/oracle/diag/tnslsnr/localhost/listener/alert/log.xml  
Listening Endpoints Summary...  
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))  
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)))  
Services Summary...  
Service "orcl" has 1 instance(s).  
  Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...  
Service "orcl002" has 1 instance(s).  
  Instance "orcl002", status UNKNOWN, has 1 handler(s) for this service...  
The command completed successfully  
\[oracle@localhost 11.2.0\]$

启动后，提示Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...  
这个错误可能是由于实例没有注册到监听服务中去，尝试注册实例：alter system register;

SQL> conn / as sysdba  
Connected.  
SQL>   
SQL> alter system register;  
System altered.  
SQL>

再尝试启动监听，发现让然失败，最后发现原来是自己的数据库实例没有启动。

启动两个数据库实例：  
$ sqlplus /nolog  
$ conn /as sysdba  
$ startup

$ lsnrctl status  
......  
Services Summary...  
Service "orcl" has 2 instance(s).  
  Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...  
  Instance "orcl", status READY, has 1 handler(s) for this service...  
Service "orcl002" has 1 instance(s).  
  Instance "orcl002", status UNKNOWN, has 1 handler(s) for this service...  
Service "orclXDB" has 1 instance(s).  
  Instance "orcl", status READY, has 1 handler(s) for this service...  
The command completed successfully  
$

发现orcl已经READY了，再启动另外一个orcl002：

$ export ORACLE\_SID=orcl002  
$ sqlplus /nolog  
SQL>  conn / as sysdba  
SQL> startup  
SQL> exit

然后再查看状态，发现orcl002也已经READY了

$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 09-JUL-2019 21:35:56

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))  
STATUS of the LISTENER  
\------------------------  
Alias                     LISTENER  
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production  
Start Date                09-JUL-2019 21:27:55  
Uptime                    0 days 0 hr. 8 min. 1 sec  
Trace Level               off  
Security                  ON: Local OS Authentication  
SNMP                      OFF  
Listener Parameter File   /opt/oracle/product/11.2.0/network/admin/listener.ora  
Listener Log File         /opt/oracle/diag/tnslsnr/localhost/listener/alert/log.xml  
Listening Endpoints Summary...  
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))  
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)))  
Services Summary...  
Service "orcl" has 2 instance(s).  
  Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...  
  Instance "orcl", status READY, has 1 handler(s) for this service...  
Service "orcl002" has 2 instance(s).  
  Instance "orcl002", status UNKNOWN, has 1 handler(s) for this service...  
  Instance "orcl002", status READY, has 1 handler(s) for this service...  
Service "orcl002XDB" has 1 instance(s).  
  Instance "orcl002", status READY, has 1 handler(s) for this service...  
Service "orclXDB" has 1 instance(s).  
  Instance "orcl", status READY, has 1 handler(s) for this service...  
The command completed successfully  
$

尝试客户端连接2个数据库实例，连接成功。