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Service 如何使用 referred 和 avileable 固定会话到一个节点并且宕机后会切换到另一个节点
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Service 使用 referred 和 avileable 固定 session 连接到一台数据库服务器上，这台数据库服务器宕机后会切换到另一台数据库服务器上
管理员管理的 DB 里，service 分为：
– preferred instance：服务启动的时候，在哪个实例上启动，该实例就是 preferred instance。
– available instance：服务所在的实例崩溃，集群件会在另外一个 available instance 里启动该服务。
必须在 oracle 用户下执行
[root@node1 ~]# srvctl add service -d orcl -s srv1 -r orcl1 -a orcl2
PRCD-1026 : Failed to create service srv1 for database orcl
PRKH-1014 : Current user root is not the oracle owner user oracle of oracle home /u01/app/oracle/product/11.2.0/dbhome_1
[oracle@node1 ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.3.0 – Production on 24-AUG-2017 19:56:25
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
————————
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 – Production
Start Date 24-AUG-2017 19:19:59
Uptime 0 days 0 hr. 36 min. 49 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/node1/listener/alert/log.xml
Listening Endpoints Summary…
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.20)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.22)(PORT=1521)))
Services Summary…
Service +ASM has 1 instance(s).
Instance +ASM1 , status READY, has 1 handler(s) for this service…
Service orcl has 1 instance(s).
Instance orcl1 , status READY, has 1 handler(s) for this service…
Service orclXDB has 1 instance(s).
Instance orcl1 , status READY, has 1 handler(s) for this service…
The command completed successfully
[oracle@node2 ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.3.0 – Production on 24-AUG-2017 19:55:48
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
————————
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 – Production
Start Date 24-AUG-2017 19:24:29
Uptime 0 days 0 hr. 31 min. 29 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/node2/listener/alert/log.xml
Listening Endpoints Summary…
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.24)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.23)(PORT=1521)))
Services Summary…
Service +ASM has 1 instance(s).
Instance +ASM2 , status READY, has 1 handler(s) for this service…
Service orcl has 1 instance(s).
Instance orcl2 , status READY, has 1 handler(s) for this service…
Service orclXDB has 1 instance(s).
Instance orcl2 , status READY, has 1 handler(s) for this service…
The command completed successfully
添加一个 service：srv1，orcl1 是 prefer，orcl2 是 available：
srvctl add service -d orcl -s srv1 -r orcl1 -a orcl2
srvctl start service -d orcl -s srv1
[oracle@node1 ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.3.0 – Production on 24-AUG-2017 20:09:06
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
————————
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 – Production
Start Date 24-AUG-2017 19:19:59
Uptime 0 days 0 hr. 49 min. 12 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/node1/listener/alert/log.xml
Listening Endpoints Summary…
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.20)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.22)(PORT=1521)))
Services Summary…
Service +ASM has 1 instance(s).
Instance +ASM1 , status READY, has 1 handler(s) for this service…
Service orcl has 1 instance(s).
Instance orcl1 , status READY, has 1 handler(s) for this service…
Service orclXDB has 1 instance(s).
Instance orcl1 , status READY, has 1 handler(s) for this service…
Service srv1 has 1 instance(s).
Instance orcl1 , status READY, has 1 handler(s) for this service…
The command completed successfully
[oracle@node2 ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.3.0 – Production on 24-AUG-2017 20:09:10
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
————————
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 – Production
Start Date 24-AUG-2017 19:24:29
Uptime 0 days 0 hr. 44 min. 44 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/node2/listener/alert/log.xml
Listening Endpoints Summary…
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.24)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.23)(PORT=1521)))
Services Summary…
Service +ASM has 1 instance(s).
Instance +ASM2 , status READY, has 1 handler(s) for this service…
Service orcl has 1 instance(s).
Instance orcl2 , status READY, has 1 handler(s) for this service…
Service orclXDB has 1 instance(s).
Instance orcl2 , status READY, has 1 handler(s) for this service…
The command completed successfully
异常关闭 orcl1，再过一会，会看到 srv1 在 orcl2 上启动了。
[root@node1 ~]# crsctl stop crs
[oracle@node2 ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.3.0 – Production on 24-AUG-2017 21:11:40
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
————————
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 – Production
Start Date 24-AUG-2017 19:24:29
Uptime 0 days 1 hr. 47 min. 28 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/node2/listener/alert/log.xml
Listening Endpoints Summary…
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.24)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.92.23)(PORT=1521)))
Services Summary…
Service +ASM has 1 instance(s).
Instance +ASM2 , status READY, has 1 handler(s) for this service…
Service orcl has 1 instance(s).
Instance orcl2 , status READY, has 1 handler(s) for this service…
Service orclXDB has 1 instance(s).
Instance orcl2 , status READY, has 1 handler(s) for this service…
Service srv1 has 1 instance(s).
Instance orcl2 , status READY, has 1 handler(s) for this service…
The command completed successfully
可以为服务添加多个 preferred 实例，这样可以不需要 available 实例：
srvctl add service -d orcl -s srv2 -r orcl1,orcl2
srvctl start service -d orcl -s srv2
[oracle@node1 ~]$ srvctl status service -d orcl -s srv2
Service srv2 is running on instance(s) orcl1,orcl2
service 可以只定义 preferred 实例，而不定义 available 实例。但是这样就没有 HA 了。
这样当 service 所在的实例崩溃以后，该 service 不会 failover 到另外一个实例上去。
把 srv1 从 orcl1 上运行，转移到 orcl2 上运行：
srvctl relocate service -d orcl -s srv1 -i orcl1 -t orcl2
感谢各位的阅读！关于“Service 如何使用 referred 和 avileable 固定会话到一个节点并且宕机后会切换到另一个节点”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！
