由於單節點操作系統需要重啟維護，版本為12C
確認集群的db_unique_name,本初的db_unique_name為orcl
SQL> show parameter name
SQL> select instance_name,status from gv$instance;
INSTANCE_NAME STATUS
---------------- ------------
orcl1 OPEN
orcl2 OPEN
#關閉node1監聽，確保應用無法通過監聽連接數據庫
[grid@node1 ~]$ srvctl stop listener -n node1
#使用crs_stat -t -v命令或者使用srvctl status listener命令檢查監聽運行情況
[grid@oranode1 ~]$ srvctl status listener -n node1
Listener LISTENER is enabled on node(s): node1
Listener LISTENER is not running on node(s): node1
[grid@oranode2 ~]$ srvctl status listener -n node2
Listener LISTENER is enabled on node(s): node2
Listener LISTENER is running on node(s): node2
#確保關閉前實例上沒有session在執行，如果有停機窗口的話建議殺一次local=no的會話
[oracle@oranode1 ~]$ ps -ef |grep -i local=no |wc -l
1
[oracle@oranode1 ~]$ ps -ef |grep -i local=no |cut -c 10-15|xargs kill -9
kill 7803: No such process
--關閉集群節點一上的數據庫實例
[grid@oranode1 ~]$ srvctl stop instance -o immediate -d orcl -i orcl1
[oracle@oranode1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 12.2.0.1.0 Production on Thu Mar 16 12:41:30 2021
Copyright (c) 1982, 2016, Oracle. All rights reserved.
Connected to an idle instance.
#確保數據庫實例已經被關閉
[grid@oranode1 ~]$ crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
ora....DISK.dg ora....up.type 0/5 0/ ONLINE ONLINE node1
ora.DATA.dg ora....up.type 0/5 0/ ONLINE ONLINE node1
ora....ER.lsnr ora....er.type 0/5 0/ ONLINE ONLINE node2
ora....N1.lsnr ora....er.type 0/5 0/0 ONLINE ONLINE node2
ora.asm ora.asm.type 0/5 0/ ONLINE ONLINE node1
ora.cvu ora.cvu.type 0/5 0/0 ONLINE ONLINE node2
ora.gsd ora.gsd.type 0/5 0/ OFFLINE OFFLINE
ora....network ora....rk.type 0/5 0/ ONLINE ONLINE node1
ora.oc4j ora.oc4j.type 0/1 0/2 ONLINE ONLINE node2
ora.ons ora.ons.type 0/3 0/ ONLINE ONLINE node1
ora....SM1.asm application 0/5 0/0 ONLINE ONLINE node1
ora....E1.lsnr application 0/5 0/0 OFFLINE OFFLINE
ora....de1.gsd application 0/5 0/0 OFFLINE OFFLINE
ora....de1.ons application 0/3 0/0 ONLINE ONLINE node1
ora....de1.vip ora....t1.type 0/0 0/0 ONLINE ONLINE node1
ora....SM2.asm application 0/5 0/0 ONLINE ONLINE node2
ora....E2.lsnr application 0/5 0/0 ONLINE ONLINE node2
ora....de2.gsd application 0/5 0/0 OFFLINE OFFLINE
ora....de2.ons application 0/3 0/0 ONLINE ONLINE node2
ora....de2.vip ora....t1.type 0/0 0/0 ONLINE ONLINE node2
ora.orcl.db ora....se.type 0/2 0/1 ONLINE ONLINE node2
ora....ry.acfs ora....fs.type 0/5 0/ ONLINE ONLINE node1
ora.scan1.vip ora....ip.type 0/0 0/0 ONLINE ONLINE node2
#可以看到，未關閉集群節點一上的實例前，ora.orcl.db的服務是在節點一上，關閉節點一的數據庫實例后，ora.orcl.db已經飄在了節點二上了。
#或者使用srvctl status database 命令檢查
[grid@node1 ~]$ srvctl status database -d orcl
Instance orcl1 is not running on node oranode1
Instance orcl2 is running on node oranode2
--關閉集群節點一的ASM服務
[grid@node1 ~]$ srvctl stop asm -n node1
PRCR-1014 : Failed to stop resource ora.asm
PRCR-1065 : Failed to stop resource ora.asm
CRS-2529: Unable to act on 'ora.asm' because that would require stopping or relocating 'ora.CLUSTER_DISK.dg', but the force option was not specified
#此處關閉asm實例在報錯，由於ora.CLUSTER_DISK的存在，指明此需要強制指定參數-f才能關閉ASM.此處如果是執行-f參數的話將會已shutdown abort的方式強制關閉數據庫，生產環境上執行此命令有風險
--#11Gr2下，ASM是cssd下管理的，需要把cssd關閉后，才能關閉ASM服務
--切換到root下執行crsctl stop crs的方式關閉整個集群節點一的CRS服務
[root@oranode1 ~]# find / -name crsctl
/u01/app/11.2.0/grid/bin/crsctl
[root@oranode1 ~]# /u01/app/11.2.0/grid/bin/crsctl stop crs
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'node1'
CRS-2673: Attempting to stop 'ora.crsd' on 'node1'
CRS-2790: Starting shutdown of Cluster Ready Services-managed resources on 'node1'
CRS-2673: Attempting to stop 'ora.CLUSTER_DISK.dg' on 'node1'
CRS-2673: Attempting to stop 'ora.registry.acfs' on 'node1'
CRS-2673: Attempting to stop 'ora.DATA.dg' on 'node1'
CRS-2673: Attempting to stop 'ora.node1.vip' on 'node1'
CRS-2677: Stop of 'ora.oranode1.vip' on 'node1' succeeded
CRS-2672: Attempting to start 'ora.node1.vip' on 'node2'
CRS-2677: Stop of 'ora.registry.acfs' on 'node1' succeeded
CRS-2677: Stop of 'ora.DATA.dg' on 'node1' succeeded
CRS-2676: Start of 'ora.node1.vip' on 'node2' succeeded
CRS-2677: Stop of 'ora.CLUSTER_DISK.dg' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.asm' on 'node1'
CRS-2677: Stop of 'ora.asm' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.ons' on 'oranode1'
CRS-2677: Stop of 'ora.ons' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.net1.network' on 'node1'
CRS-2677: Stop of 'ora.net1.network' on 'node1' succeeded
CRS-2792: Shutdown of Cluster Ready Services-managed resources on 'node1' has completed
CRS-2677: Stop of 'ora.crsd' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.crf' on 'node1'
CRS-2673: Attempting to stop 'ora.ctssd' on 'node1'
CRS-2673: Attempting to stop 'ora.evmd' on 'node1'
CRS-2673: Attempting to stop 'ora.asm' on 'node1'
CRS-2673: Attempting to stop 'ora.drivers.acfs' on 'node1'
CRS-2673: Attempting to stop 'ora.mdnsd' on 'node1'
CRS-2677: Stop of 'ora.crf' on 'node1' succeeded
CRS-2677: Stop of 'ora.evmd' on 'node1' succeeded
CRS-2677: Stop of 'ora.mdnsd' on 'node1' succeeded
CRS-2677: Stop of 'ora.ctssd' on 'node1' succeeded
CRS-2677: Stop of 'ora.asm' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.cluster_interconnect.haip' on 'node1'
CRS-2677: Stop of 'ora.drivers.acfs' on 'node1' succeeded
CRS-2677: Stop of 'ora.cluster_interconnect.haip' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.cssd' on 'node1'
CRS-2677: Stop of 'ora.cssd' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.gipcd' on 'node1'
CRS-2677: Stop of 'ora.gipcd' on 'node1' succeeded
CRS-2673: Attempting to stop 'ora.gpnpd' on 'node1'
CRS-2677: Stop of 'ora.gpnpd' on 'node1' succeeded
CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'node1' has completed
CRS-4133: Oracle High Availability Services has been stopped.
#可以看到，CRS命令執行輸出，節點一的cluster服務已經完全飄在了節點二上。
[grid@oranode2 ~]$ crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
ora....DISK.dg ora....up.type 0/5 0/ ONLINE ONLINE node2
ora.DATA.dg ora....up.type 0/5 0/ ONLINE ONLINE node2
ora....ER.lsnr ora....er.type 0/5 0/ ONLINE ONLINE node2
ora....N1.lsnr ora....er.type 0/5 0/0 ONLINE ONLINE node2
ora.asm ora.asm.type 0/5 0/ ONLINE ONLINE node2
ora.cvu ora.cvu.type 0/5 0/0 ONLINE ONLINE node2
ora.gsd ora.gsd.type 0/5 0/ OFFLINE OFFLINE
ora....network ora....rk.type 0/5 0/ ONLINE ONLINE node2
ora.oc4j ora.oc4j.type 0/1 0/2 ONLINE ONLINE node2
ora.ons ora.ons.type 0/3 0/ ONLINE ONLINE node2
ora....de1.vip ora....t1.type 0/0 0/0 ONLINE ONLINE node2
ora....SM2.asm application 0/5 0/0 ONLINE ONLINE node2
ora....E2.lsnr application 0/5 0/0 ONLINE ONLINE node2
ora....de2.gsd application 0/5 0/0 OFFLINE OFFLINE
ora....de2.ons application 0/3 0/0 ONLINE ONLINE node2
ora....de2.vip ora....t1.type 0/0 0/0 ONLINE ONLINE node2
ora.orcl.db ora....se.type 0/2 0/1 ONLINE ONLINE node2
ora....ry.acfs ora....fs.type 0/5 0/ ONLINE ONLINE node2
ora.scan1.vip ora....ip.type 0/0 0/0 ONLINE ONLINE node2
--確保ASM服務已經關閉
[grid@oranode2 ~]$ srvctl status asm -n node1
ASM is not running on node1
[grid@oranode2 ~]$ srvctl status asm -n node2
ASM is running on node2
--驗證集群節點一的oracle相關服務已經完全關閉
[grid@oranode1 ~]$ ps -ef |grep -i ora
root 1555 1 0 12:03 ? 00:00:10 /u01/app/11.2.0/grid/jdk/jre/bin/java -Xms64m -Xmx256m -classpath /u01/app/11.2.0/grid/tfa/node1/tfa_home/jar/RATFA.jar:/u01/app/11.2.0/grid/tfa/node1/tfa_home/jar/je-4.0.103.jar:/u01/app/11.2.0/grid/tfa/node1/tfa_home/jar/ojdbc6.jar oracle.rat.tfa.TFAMain /u01/app/11.2.0/grid/tfa/node1/tfa_home
root 1775 1704 0 12:03 ? 00:00:01 hald-addon-storage: polling /dev/sr0 (every 2 sec)
grid 11980 11916 0 13:14 pts/0 00:00:00 grep -i ora
[grid@oranode1 ~]$ ps -ef |grep -i asm
grid 11988 11916 0 13:14 pts/0 00:00:00 grep -i asm
--確保集群節點二可以正常訪問
SQL> select instance_name,status from gv$instance;
INSTANCE_NAME STATUS
---------------- ------------
orcl2 OPEN
#在配合os補丁打完后需要開啟節點一上ORACLE服務
開啟步驟：
[root@oranode1 ~]# /u01/app/11.2.0/grid/bin/crsctl start crs
CRS-4123: Oracle High Availability Services has been started.
--確保節點一上CRS服務已經開啟成功
[grid@oranode1 ~]$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora....DISK.dg ora....up.type ONLINE ONLINE node1
ora.DATA.dg ora....up.type ONLINE ONLINE node1
ora....ER.lsnr ora....er.type ONLINE ONLINE node2
ora....N1.lsnr ora....er.type ONLINE ONLINE node2
ora.asm ora.asm.type ONLINE ONLINE node1
ora.cvu ora.cvu.type ONLINE ONLINE node2
ora.gsd ora.gsd.type OFFLINE OFFLINE
ora....network ora....rk.type ONLINE ONLINE node1
ora.oc4j ora.oc4j.type ONLINE ONLINE node2
ora.ons ora.ons.type ONLINE ONLINE node1
ora....SM1.asm application ONLINE ONLINE node1
ora....E1.lsnr application OFFLINE OFFLINE
ora....de1.gsd application OFFLINE OFFLINE
ora....de1.ons application ONLINE ONLINE node1
ora....de1.vip ora....t1.type ONLINE ONLINE node1
ora....SM2.asm application ONLINE ONLINE node2
ora....E2.lsnr application ONLINE ONLINE node2
ora....de2.gsd application OFFLINE OFFLINE
ora....de2.ons application ONLINE ONLINE node2
ora....de2.vip ora....t1.type ONLINE ONLINE node2
ora.orcl.db ora....se.type ONLINE ONLINE node2
ora....ry.acfs ora....fs.type ONLINE ONLINE node1
ora.scan1.vip ora....ip.type ONLINE ONLINE node2
--確保ASM服務已經運行在兩個節點上
[grid@oranode1 ~]$ srvctl status asm
ASM is running on node2,node1
--開啟集群節點一數據庫實例
[grid@oranode1 ~]$ srvctl start instance -d orcl -i orcl1
--驗證是否啟動成功
[grid@oranode1 ~]$ srvctl status database -d orcl
Instance orcl1 is running on node node1
Instance orcl2 is running on node node2
--開啟完成后集群服務校驗，確保服務開啟成功且各自運行在集群節點上
[grid@oranode1 ~]$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora....DISK.dg ora....up.type ONLINE ONLINE node1
ora.DATA.dg ora....up.type ONLINE ONLINE node1
ora....ER.lsnr ora....er.type ONLINE ONLINE node1
ora....N1.lsnr ora....er.type ONLINE ONLINE node2
ora.asm ora.asm.type ONLINE ONLINE node1
ora.cvu ora.cvu.type ONLINE ONLINE node2
ora.gsd ora.gsd.type OFFLINE OFFLINE
ora....network ora....rk.type ONLINE ONLINE node1
ora.oc4j ora.oc4j.type ONLINE ONLINE node2
ora.ons ora.ons.type ONLINE ONLINE node1
ora....SM1.asm application ONLINE ONLINE node1
ora....E1.lsnr application ONLINE ONLINE node1
ora....de1.gsd application OFFLINE OFFLINE
ora....de1.ons application ONLINE ONLINE node1
ora....de1.vip ora....t1.type ONLINE ONLINE node1
ora....SM2.asm application ONLINE ONLINE node2
ora....E2.lsnr application ONLINE ONLINE node2
ora....de2.gsd application OFFLINE OFFLINE
ora....de2.ons application ONLINE ONLINE node2
ora....de2.vip ora....t1.type ONLINE ONLINE node2
ora.orcl.db ora....se.type ONLINE ONLINE node1
ora....ry.acfs ora....fs.type ONLINE ONLINE node1
ora.scan1.vip ora....ip.type ONLINE ONLINE node2
[grid@node1 ~]$
--節點停機開啟操作與節點一上操作順序一致