前面关闭了节点3上的数据库实例和ASM实例，这篇文章继续介绍清除CLUSTER节点的操作。

bash-2.03$ /data/oracle/product/10.2/crs/bin/crs_stat -t
名称           类型           目标      状态      主机       
------------------------------------------------------------
ora....SM1.asm application    ONLINE    ONLINE    racnode1   
ora....E1.lsnr application    ONLINE    ONLINE    racnode1   
ora....E1.lsnr application    ONLINE    OFFLINE              
ora....de1.gsd application    ONLINE    ONLINE    racnode1   
ora....de1.ons application    ONLINE    ONLINE    racnode1   
ora....de1.vip application    ONLINE    ONLINE    racnode1   
ora....SM2.asm application    ONLINE    ONLINE    racnode2   
ora....E2.lsnr application    ONLINE    ONLINE    racnode2   
ora....E2.lsnr application    ONLINE    OFFLINE              
ora....de2.gsd application    ONLINE    ONLINE    racnode2   
ora....de2.ons application    ONLINE    ONLINE    racnode2   
ora....de2.vip application    ONLINE    ONLINE    racnode2   
ora....SM3.asm application    OFFLINE   OFFLINE              
ora....E3.lsnr application    ONLINE    ONLINE    racnode3   
ora....de3.gsd application    ONLINE    ONLINE    racnode3   
ora....de3.ons application    ONLINE    ONLINE    racnode3   
ora....de3.vip application    ONLINE    ONLINE    racnode3   
ora....TRAC.cs application    OFFLINE   OFFLINE              
ora....ac1.srv application    OFFLINE   OFFLINE              
ora....ac2.srv application    OFFLINE   OFFLINE              
ora.testrac.db application    ONLINE    ONLINE    racnode1   
ora....c1.inst application    ONLINE    ONLINE    racnode1   
ora....c2.inst application    ONLINE    ONLINE    racnode2   
ora....c3.inst application    OFFLINE   OFFLINE              

检查当前的CLUSTER状态。

首先清除srvctl工具中的实例和ASM配置信息。

bash-3.00$ srvctl status db -d testrac
实例 testrac1 正在节点 racnode1 上运行
实例 testrac2 正在节点 racnode2 上运行
实例 testrac3 没有在 racnode3 节点上运行
bash-3.00$ srvctl remove inst -d testrac -i testrac3
是否从数据库 testrac 中删除实例 testrac3? (y/[n]) y
bash-3.00$ srvctl status asm -n racnode3
ASM 实例 +ASM3 不在节点 racnode3 上运行。
bash-3.00$ srvctl remove asm -n racnode3

在清除rac节点前，需要利用netca来删除监听，否则会报错：

# ./rootdelete.sh
CRS resources for listeners are still configured. You must remove the CRS listener resources before deconfiging CRS stack. Use NETCA to remove them.
1

启动netca，选择CLUSTER操作，选择监听，最后选择删除监听。

bash-3.00$ netca

Oracle Net Services Configuration:
racnode3...
    Deleted listener: LISTENER_RACNODE3
Oracle Net Services configuration successful. The exit code is 0

利用racgons清除rac的配置信息，其中远端端口信息可以从$CRS_HOME/opmn/conf/ons.config文件中获取：

bash-2.03$ more /data/oracle/product/10.2/crs/opmn/conf/ons.config
localport=6100
remoteport=6200
loglevel=3
useocr=on
bash-3.00$ ./racgons remove_config racnode3:6200
racgons: Existing key value on racnode3 = 6200.
racgons: racnode3:6200 removed from OCR.

下面利用root执行rootdelete.sh：

bash-3.00$ su -
口令:
Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
# bash
bash-3.00# cd /data/oracle/product/10.2/crs/install
bash-3.00# ./rootdelete.sh
Shutting down Oracle Cluster Ready Services (CRS):
Jun 16 16:46:12.850 | INF | daemon shutting down
Stopping resources.
Successfully stopped CRS resources
Stopping CSSD.
Shutting down CSS daemon.
Shutdown request successfully issued.
Shutdown has begun. The daemons should exit soon.
Checking to see if Oracle CRS stack is down...
Oracle CRS stack is not running.
Oracle CRS stack is down now.
Removing script. for Oracle Cluster Ready services
Updating ocr file for downgrade
Cleaning up SCR settings in '/var/opt/oracle/scls_scr'

在CLUSTER的安装节点racnode1上执行脚本：

# bash
bash-2.03# cd /data/oracle/product/10.2/crs/install
bash-2.03# ./rootdeletenode.sh racnode3,3
CRS-0210: Could not find resource 'ora.racnode3.LISTENER_RACNODE3.lsnr'.
PRKO-2112 : Some or all node applications are not removed successfully on node: racnode3
CRS nodeapps are deleted successfully
clscfg: EXISTING configuration version 3 detected.
clscfg: version 3 is 10G Release 2.
Successfully deleted 14 values from OCR.
Key SYSTEM.css.interfaces.noderacnode3 marked for deletion is not there. Ignoring.
Successfully deleted 5 keys from OCR.
Node deletion operation successful.
'racnode3,3' deleted successfully

再次检查CLUSTER配置：

bash-2.03$ crs_stat -t
名称           类型           目标      状态      主机       
------------------------------------------------------------
ora....SM1.asm application    ONLINE    ONLINE    racnode1   
ora....E1.lsnr application    ONLINE    ONLINE    racnode1   
ora....E1.lsnr application    ONLINE    OFFLINE              
ora....de1.gsd application    ONLINE    ONLINE    racnode1   
ora....de1.ons application    ONLINE    ONLINE    racnode1   
ora....de1.vip application    ONLINE    ONLINE    racnode1   
ora....SM2.asm application    ONLINE    ONLINE    racnode2   
ora....E2.lsnr application    ONLINE    ONLINE    racnode2   
ora....E2.lsnr application    ONLINE    OFFLINE              
ora....de2.gsd application    ONLINE    ONLINE    racnode2   
ora....de2.ons application    ONLINE    ONLINE    racnode2   
ora....de2.vip application    ONLINE    ONLINE    racnode2   
ora....TRAC.cs application    OFFLINE   OFFLINE              
ora....ac1.srv application    OFFLINE   OFFLINE              
ora....ac2.srv application    OFFLINE   OFFLINE              
ora.testrac.db application    ONLINE    ONLINE    racnode1   
ora....c1.inst application    ONLINE    ONLINE    racnode1   
ora....c2.inst application    ONLINE    ONLINE    racnode2   
bash-2.03$ olsnodes -n
racnode1        1
racnode2        2

至此，CLUSTER清除的手工操作完成。