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

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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

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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！

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