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Oracle 监听
一：没有listener.ora监听文件
监听文件listener.ora文件丢失；
没有listener.ora文件情况时，以默认方式运行监听器，此时，监听器将在解析为计算机主机名(端口1521)的任何地址上进行监听；
建议始终配置listener.ora文件，使Oracle Net环境可以自我记录；
[oracle@chen admin]$ pwd
/u01/app/oracle/product/11.2.0.4/network/admin
[oracle@chen admin]$ ls
samples shrept.lst tnsnames.ora
没有配置listener.ora时，自动使用动态注册
[oracle@chen admin]$
lsnrctl status
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 20-JUL-2017 15:05:25
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 20-JUL-2017 15:03:54
Uptime 0 days 0 hr. 1 min. 30 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /u01/app/oracle/diag/tnslsnr/chen/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=chen)(PORT=1521)))
Services Summary...
Service "orcl" has 1 instance(s).
Instance "orcl", 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
二：监听静态注册
[oracle@chen admin]$ pwd
/u01/app/oracle/product/11.2.0.4/network/admin
[oracle@chen admin]$ cat listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0.4)
(SID_NAME = orcl)
)
)
静态注册时：
可以远程启动数据库(需要有口令文件)；
C:\Users\Administrator>sqlplus sys/oracle@10.1.233.100:1521/orcl as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on 星期四 7月 20 13:33:09 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
已连接到空闲例程。
SQL>
startup
ORACLE 例程已经启动。
Total System Global Area 839282688 bytes
Fixed Size 2257880 bytes
Variable Size 545262632 bytes
Database Buffers 289406976 bytes
Redo Buffers 2355200 bytes
数据库装载完毕。
数据库已经打开。 [oracle@chen admin]$ lsnrctl status
.....
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=chen)(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 "orclXDB" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully
配置DG,EM等建议使用静态注册
三：监听动态注册
[oracle@chen admin]$ cat listener.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = chen)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
SQL> alter system register;
System altered.
[oracle@chen admin]$ lsnrctl status
Services Summary...
Service "orcl" has 1 instance(s).
Instance "orcl", 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
实例未启动时，注册不了服务
Services Summary...
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=chen)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
The listener supports no services
The command completed successfully
动态注册时无法远程启动数据库
C:\Users\Administrator>sqlplus sys/oracle@10.1.233.100:1521/orcl as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on 星期四 7月 20 14:26:57 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
ERROR:
ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务
请输入用户名:
四：监听动态注册+静态注册
[oracle@chen admin]$ cat listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0.4)
(SID_NAME = orcl)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = chen)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
[oracle@chen admin]$ 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 "orclXDB" has 1 instance(s).
Instance "orcl", status
READY, has 1 handler(s) for this service...
The command completed successfully
可以远程启动数据库
C:\Users\Administrator>sqlplus sys/oracle@10.1.233.100:1521/orcl as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on 星期四 7月 20 14:22:59 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
已连接到空闲例程。
SQL>
startup
ORACLE 例程已经启动。
Total System Global Area 839282688 bytes
Fixed Size 2257880 bytes
Variable Size 545262632 bytes
Database Buffers 289406976 bytes
Redo Buffers 2355200 bytes
数据库装载完毕。
数据库已经打开。官方文档位置如下：
Oracle Database Net Services Reference
http://docs.oracle.com/cd/E11882_01/network.112/e10835/listener.htm#NETRF008
Oracle Net Listener Parameters (listener.ora)
http://docs.oracle.com/cd/E11882_01/network.112/e10835/listener.htm#NETRF008
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