Service如何使用referred和avileable固定會話到一個節點并且宕機后會切換到另一個節點

這篇文章給大家分享的是有關Service如何使用referred和avileable固定會話到一個節點并且宕機后會切換到另一個節點的內容。小編覺得挺實用的，因此分享給大家做個參考，一起跟隨小編過來看看吧。

Service使用referred和avileable固定session連接到一臺數據庫服務器上，這臺數據庫服務器宕機后會切換到另一臺數據庫服務器上

管理員管理的DB里，service分為：
- preferred instance：服務啟動的時候，在哪個實例上啟動，該實例就是preferred instance。
- available instance：服務所在的實例崩潰，集群件會在另外一個available instance里啟動該服務。

必須在oracle用戶下執行
[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


添加一個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






異常關閉orcl1，再過一會，會看到srv1在orcl2上啟動了。

[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



可以為服務添加多個preferred實例，這樣可以不需要available實例：
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可以只定義preferred實例，而不定義available實例。但是這樣就沒有HA了。
這樣當service所在的實例崩潰以后，該service不會failover到另外一個實例上去。


把srv1從orcl1上運行，轉移到orcl2上運行：
srvctl relocate service -d orcl -s srv1 -i orcl1 -t orcl2

感謝各位的閱讀！關于“Service如何使用referred和avileable固定會話到一個節點并且宕機后會切換到另一個節點”這篇文章就分享到這里了，希望以上內容可以對大家有一定的幫助，讓大家可以學到更多知識，如果覺得文章不錯，可以把它分享出去讓更多的人看到吧！