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！