Centos6/RHEL6 11.2.0.3rac添加节点

操作系统版本：Centos6.2 x64

Oracle版本：11.2.0.3 rac

其实添加节点的过程基本上等同于安装rac的步骤，对于新加的节点需要手工去配置ssh。此次试验为模拟1节点坏掉，重新将1号节点添加进来

 

实施步骤：

1、hosts文件  

hosts文件不需要修改，保持原样即可。    

192.168.0.13 DB-A

10.10.10.13  DB-A-priv

192.168.0.16 DB-A-vip

192.168.0.14 DB-B

10.10.10.14  DB-B-priv

192.168.0.17 DB-B-vip

192.168.0.15 scan-ip

2、添加内核参数

vi /etc/sysctl.conf:

 

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

fs.file-max = 6815744

net.ipv4.ip_local_port_range = 9000 65500

net.core.rmem_default=262144

net.core.rmem_max=4194304

net.core.wmem_default=262144

net.core.wmem_max=1048576

fs.aio-max-nr=1048576

 

3、修改limits.conf文件

grid                 soft    nproc   2047

grid                 hard    nproc   16384

grid                 soft    nofile  1024

grid                 hard    nofile  65536

grid                 hard    stack   10240

oracle               soft    nproc   2047

oracle               hard    nproc   16384

oracle               soft    nofile  1024

oracle               hard    nofile  65536

oracle               hard    stack   10240

 

4、安装Oracle所需包

yum install binutils compat-libcapl elfutils-libelf glibc  glibc-common libaio libgcc libstdc++ make compat-libstdc++-33 elfutils-libelf-devel glibc-headers glibc-devel libgomp gcc gcc-c++ libaio-devel libstdc++-devel unixODBC unixODBC-devel sysstat  compat-libcap1

 

5、添加用户和组

/usr/sbin/groupadd -g 1000 oinstall

/usr/sbin/groupadd -g 1100 asmadmin

/usr/sbin/groupadd -g 1200 dba

/usr/sbin/groupadd -g 1201 oper

/usr/sbin/groupadd -g 1300 asmdba

/usr/sbin/groupadd -g 1301 asmoper

 

useradd -u 1100 -g oinstall -G asmadmin,asmdba,asmoper grid

useradd -u 1200 -g oinstall -G dba,oper,asmdba oracle

passwd oracle

passwd grid

 

6、创建安装目录：

mkdir -p /u01/app/11.2.0/grid

mkdir -p /u01/app/grid

chown grid:oinstall /u01/ -R

chmod 775 /u01/ -R

mkdir -p /u02/db_1

chown oracle:oinstall /u02/ -R

chmod 775 /u02/ -R

 

7、修改环境变量

grid：

ORACLE_SID=+ASM1; export ORACLE_SID  

ORACLE_BASE=/u01/app/grid; export ORACLE_BASE

ORACLE_HOME=/u01/app/11.2.0/grid; export ORACLE_HOME

PATH=$PATH:$HOME/bin:$ORACLE_PATH:$ORACLE_HOME/bin

export PATH

Oracle：

export ORACLE_SID=orcl1 

export ORACLE_BASE=/u02

export ORACLE_HOME=/u02/db_1

PATH=$PATH:$HOME/bin:$ORACLE_HOME/bin

export PATH

 

8、禁用NTP服务

#/sbin/service ntpd stop

#chkconfig ntpd off

#mv  /etc/ntp.conf  /etc/ntp.conf.bak

 

9、绑定裸设备

/dev/sdb: 419430400

/dev/sda: 209715200

/dev/sde:   5242880

/dev/sdd: 209715200

/dev/sdf:   5242880

/dev/sdc: 419430400

/dev/sdg:   5242880

 

raw  /dev/raw/raw1  /dev/sde

raw  /dev/raw/raw2  /dev/sdg

raw  /dev/raw/raw3  /dev/sdf

raw  /dev/raw/raw4  /dev/sdc

raw  /dev/raw/raw5  /dev/sdd

 

10、修改磁盘权限

chown grid:asmadmin  /dev/raw/raw1

chown grid:asmadmin  /dev/raw/raw2

chown grid:asmadmin  /dev/raw/raw3

chown grid:oinstall  /dev/raw/raw4

chown grid:oinstall  /dev/raw/raw5

chmod 660  /dev/raw/raw1

chmod 660  /dev/raw/raw2

chmod 660  /dev/raw/raw3

chmod 660  /dev/raw/raw4

chmod 660  /dev/raw/raw5

 

添加到60-rules.d文件：

ACTION=="add", KERNEL=="sde",RUN+="/bin/raw /dev/raw/raw1 %N"

ACTION=="add", KERNEL=="sdg",RUN+="/bin/raw /dev/raw/raw2 %N"

ACTION=="add", KERNEL=="sdf",RUN+="/bin/raw /dev/raw/raw3 %N"

ACTION=="add", KERNEL=="sdc",RUN+="/bin/raw /dev/raw/raw4 %N"

ACTION=="add", KERNEL=="sdd",RUN+="/bin/raw /dev/raw/raw5 %N"

KERNEL=="raw[1-3]", OWNER="grid", GROUP="asmadmin", MODE="660"

KERNEL=="raw[4-5]", OWNER="grid", GROUP="asmadmin", MODE="660"

 

11、配置ssh同步

 

grid、Oracle用户均执行以下操作：

在需要新加的节点执行：

mkdir ~/.ssh

chmod 700 ~/.ssh

ssh-keygen -t rsa

ssh-keygen -t dsa

cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

 

在DB-B节点执行：

ssh DB-A cat ~/.ssh/id_rsa.pub >>   ~/.ssh/authorized_keys

ssh DB-A cat ~/.ssh/id_dsa.pub >>   ~/.ssh/authorized_keys

scp ~/.ssh/authorized_keys  DB-B:~/.ssh/authorized_keys

scp ~/.ssh/authorized_keys  DB-A :~/.ssh/authorized_keys

 

执行如下命令（两个节点都要执行，且不需要再输入密码）：

ssh DB-B date

ssh DB-A date

ssh DB-B-priv date

ssh DB-A-priv date

 

 

12、扩展grid软件

[grid@His-DB-B bin]$ export IGNORE_PREADDNODE_CHECKS=Y

[grid@His-DB-B bin]$ ./addNode.sh -silent CLUSTER_NEW_NODES={DB-A} CLUSTER_NEW_VIRTUAL_HOSTNAMES={DB-A-vip}

 

输出如下：

Starting Oracle Universal Installer...

 

Checking swap space: must be greater than 500 MB.   Actual 39999 MB    Passed

Oracle Universal Installer, Version 11.2.0.3.0 Production

Copyright (C) 1999, 2011, Oracle. All rights reserved.

 

 

Performing tests to see whether nodes DB-A  are available

............................................................... 100% Done.

 

.

-----------------------------------------------------------------------------

Cluster Node Addition Summary

Global Settings

   Source: /u01/app/11.2.0/grid

   New Nodes

Space Requirements

   New Nodes

      His-DB-A

         /u01: Required 19.90GB : Available 45.44GB

Installed Products

   Product Names

      Oracle Grid Infrastructure 11.2.0.3.0

      Sun JDK 1.5.0.30.03

      Installer SDK Component 11.2.0.3.0

      Oracle One-Off Patch Installer 11.2.0.1.7

      Oracle Universal Installer 11.2.0.3.0

      Oracle USM Deconfiguration 11.2.0.3.0

      Oracle Configuration Manager Deconfiguration 10.3.1.0.0

      Enterprise Manager Common Core Files 10.2.0.4.4

      Oracle DBCA Deconfiguration 11.2.0.3.0

      Oracle RAC Deconfiguration 11.2.0.3.0

      Oracle Quality of Service Management (Server) 11.2.0.3.0

      Installation Plugin Files 11.2.0.3.0

      Universal Storage Manager Files 11.2.0.3.0

      Oracle Text Required Support Files 11.2.0.3.0

      Automatic Storage Management Assistant 11.2.0.3.0

      Oracle Database 11g Multimedia Files 11.2.0.3.0

      Oracle Multimedia Java Advanced Imaging 11.2.0.3.0

      Oracle Globalization Support 11.2.0.3.0

      Oracle Multimedia Locator RDBMS Files 11.2.0.3.0

      Oracle Core Required Support Files 11.2.0.3.0

      Bali Share 1.1.18.0.0

      Oracle Database Deconfiguration 11.2.0.3.0

      Oracle Quality of Service Management (Client) 11.2.0.3.0

      Expat libraries 2.0.1.0.1

      Oracle Containers for Java 11.2.0.3.0

      Perl Modules 5.10.0.0.1

      Secure Socket Layer 11.2.0.3.0

      Oracle JDBC/OCI Instant Client 11.2.0.3.0

      Oracle Multimedia Client Option 11.2.0.3.0

      LDAP Required Support Files 11.2.0.3.0

      Character Set Migration Utility 11.2.0.3.0

      Perl Interpreter 5.10.0.0.2

      PL/SQL Embedded Gateway 11.2.0.3.0

      OLAP SQL Scripts 11.2.0.3.0

      Database SQL Scripts 11.2.0.3.0

      Oracle Extended Windowing Toolkit 3.4.47.0.0

      SSL Required Support Files for InstantClient 11.2.0.3.0

      SQL*Plus Files for Instant Client 11.2.0.3.0

      Oracle Net Required Support Files 11.2.0.3.0

      Oracle Database User Interface 2.2.13.0.0

      RDBMS Required Support Files for Instant Client 11.2.0.3.0

      RDBMS Required Support Files Runtime 11.2.0.3.0

      XML Parser for Java 11.2.0.3.0

      Oracle Security Developer Tools 11.2.0.3.0

      Oracle Wallet Manager 11.2.0.3.0

      Enterprise Manager plugin Common Files 11.2.0.3.0

      Platform Required Support Files 11.2.0.3.0

      Oracle JFC Extended Windowing Toolkit 4.2.36.0.0

      RDBMS Required Support Files 11.2.0.3.0

      Oracle Ice Browser 5.2.3.6.0

      Oracle Help For Java 4.2.9.0.0

      Enterprise Manager Common Files 10.2.0.4.3

      Deinstallation Tool 11.2.0.3.0

      Oracle Java Client 11.2.0.3.0

      Cluster Verification Utility Files 11.2.0.3.0

      Oracle Notification Service (eONS) 11.2.0.3.0

      Oracle LDAP administration 11.2.0.3.0

      Cluster Verification Utility Common Files 11.2.0.3.0

      Oracle Clusterware RDBMS Files 11.2.0.3.0

      Oracle Locale Builder 11.2.0.3.0

      Oracle Globalization Support 11.2.0.3.0

      Buildtools Common Files 11.2.0.3.0

      Oracle RAC Required Support Files-HAS 11.2.0.3.0

      SQL*Plus Required Support Files 11.2.0.3.0

      XDK Required Support Files 11.2.0.3.0

      Agent Required Support Files 10.2.0.4.3

      Parser Generator Required Support Files 11.2.0.3.0

      Precompiler Required Support Files 11.2.0.3.0

      Installation Common Files 11.2.0.3.0

      Required Support Files 11.2.0.3.0

      Oracle JDBC/THIN Interfaces 11.2.0.3.0

      Oracle Multimedia Locator 11.2.0.3.0

      Oracle Multimedia 11.2.0.3.0

      HAS Common Files 11.2.0.3.0

      Assistant Common Files 11.2.0.3.0

      PL/SQL 11.2.0.3.0

      HAS Files for DB 11.2.0.3.0

      Oracle Recovery Manager 11.2.0.3.0

      Oracle Database Utilities 11.2.0.3.0

      Oracle Notification Service 11.2.0.3.0

      SQL*Plus 11.2.0.3.0

      Oracle Netca Client 11.2.0.3.0

      Oracle Net 11.2.0.3.0

      Oracle JVM 11.2.0.3.0

      Oracle Internet Directory Client 11.2.0.3.0

      Oracle Net Listener 11.2.0.3.0

      Cluster Ready Services Files 11.2.0.3.0

      Oracle Database 11g 11.2.0.3.0

-----------------------------------------------------------------------------

 

 

Instantiating scripts for add node (Thursday, August 7, 2014 12:28:31 PM CST)

.                                                                 1% Done.

Instantiation of add node scripts complete

 

Copying to remote nodes (Thursday, August 7, 2014 12:28:34 PM CST)

...............................................................................................                                 96% Done.

Home copied to new nodes

 

Saving inventory on nodes (Thursday, August 7, 2014 12:32:55 PM CST)

.                                                               100% Done.

Save inventory complete

WARNING:A new inventory has been created on one or more nodes in this session. However, it has not yet been registered as the central inventory of this system.

To register the new inventory please run the script at '/u01/app/oraInventory/orainstRoot.sh' with root privileges on nodes ‘DB-A '.

If you do not register the inventory, you may not be able to update or patch the products you installed.

The following configuration scripts need to be executed as the "root" user in each new cluster node. Each script in the list below is followed by a list of nodes.

/u01/app/oraInventory/orainstRoot.sh #On nodes DB-A

/u01/app/11.2.0/grid/root.sh #On nodes DB-A

To execute the configuration scripts:

    1. Open a terminal window

    2. Log in as "root"

    3. Run the scripts in each cluster node

   

The Cluster Node Addition of /u01/app/11.2.0/grid was successful.

Please check '/tmp/silentInstall.log' for more details.

 

以root用户执行上述两个脚本：

[root@DB-A oraInventory]# ./orainstRoot.sh

Creating the Oracle inventory pointer file (/etc/oraInst.loc)

Changing permissions of /u01/app/oraInventory.

Adding read,write permissions for group.

Removing read,write,execute permissions for world.

 

Changing groupname of /u01/app/oraInventory to oinstall.

The execution of the script is complete.

 

[root@DB-A grid]# ./root.sh

Performing root user operation for Oracle 11g

 

The following environment variables are set as:

    ORACLE_OWNER= grid

    ORACLE_HOME=  /u01/app/11.2.0/grid

 

Enter the full pathname of the local bin directory: [/usr/local/bin]:

The contents of "dbhome" have not changed. No need to overwrite.

The contents of "oraenv" have not changed. No need to overwrite.

The contents of "coraenv" have not changed. No need to overwrite.

 

Entries will be added to the /etc/oratab file as needed by

Database Configuration Assistant when a database is created

Finished running generic part of root script.

Now product-specific root actions will be performed.

Using configuration parameter file: /u01/app/11.2.0/grid/crs/install/crsconfig_params

Creating trace directory

User ignored Prerequisites during installation

OLR initialization - successful

Adding Clusterware entries to upstart

CRS-4402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node his-db-b, number 2, and is terminating

An active cluster was found during exclusive startup, restarting to join the cluster

clscfg: EXISTING configuration version 5 detected.

clscfg: version 5 is 11g Release 2.

Successfully accumulated necessary OCR keys.

Creating OCR keys for user 'root', privgrp 'root'..

Operation successful.

Preparing packages for installation...

cvuqdisk-1.0.9-1

Configure Oracle Grid Infrastructure for a Cluster ... succeeded

 

13、扩展database软件

[oracle@His-DB-A bin]$ ./addNode.sh  -silent "CLUSTER_NEW_NODES={His-DB-A}"

输出如下：

Performing pre-checks for node addition

Checking node reachability...

Node reachability check passed from node "His-DB-B"

Checking user equivalence...

User equivalence check passed for user "oracle"

 

WARNING:

Node "His-DB-B" already appears to be part of cluster

 

Pre-check for node addition was successful.

Starting Oracle Universal Installer...

 

Checking swap space: must be greater than 500 MB.   Actual 1691 MB    Passed

Oracle Universal Installer, Version 11.2.0.3.0 Production

Copyright (C) 1999, 2011, Oracle. All rights reserved.

 

 

Performing tests to see whether nodes His-DB-A ,His-DB-B are available

............................................................... 100% Done.

 

.

-----------------------------------------------------------------------------

Cluster Node Addition Summary

Global Settings

   Source: /u02/db_1

   New Nodes

Space Requirements

   New Nodes

      His-DB-B

         /: Required 4.23GB : Available 9.14GB

Installed Products

   Product Names

      Oracle Database 11g 11.2.0.3.0

      Sun JDK 1.5.0.30.03

      Installer SDK Component 11.2.0.3.0

      Oracle One-Off Patch Installer 11.2.0.1.7

      Oracle Universal Installer 11.2.0.3.0

      Oracle USM Deconfiguration 11.2.0.3.0

      Oracle Configuration Manager Deconfiguration 10.3.1.0.0

      Oracle DBCA Deconfiguration 11.2.0.3.0

      Oracle RAC Deconfiguration 11.2.0.3.0

      Oracle Database Deconfiguration 11.2.0.3.0

      Oracle Configuration Manager Client 10.3.2.1.0

      Oracle Configuration Manager 10.3.5.0.1

      Oracle ODBC Driverfor Instant Client 11.2.0.3.0

      LDAP Required Support Files 11.2.0.3.0

      SSL Required Support Files for InstantClient 11.2.0.3.0

      Bali Share 1.1.18.0.0

      Oracle Extended Windowing Toolkit 3.4.47.0.0

      Oracle JFC Extended Windowing Toolkit 4.2.36.0.0

      Oracle Real Application Testing 11.2.0.3.0

      Oracle Database Vault J2EE Application 11.2.0.3.0

      Oracle Label Security 11.2.0.3.0

      Oracle Data Mining RDBMS Files 11.2.0.3.0

      Oracle OLAP RDBMS Files 11.2.0.3.0

      Oracle OLAP API 11.2.0.3.0

      Platform Required Support Files 11.2.0.3.0

      Oracle Database Vault option 11.2.0.3.0

      Oracle RAC Required Support Files-HAS 11.2.0.3.0

      SQL*Plus Required Support Files 11.2.0.3.0

      Oracle Display Fonts 9.0.2.0.0

      Oracle Ice Browser 5.2.3.6.0

      Oracle JDBC Server Support Package 11.2.0.3.0

      Oracle SQL Developer 11.2.0.3.0

      Oracle Application Express 11.2.0.3.0

      XDK Required Support Files 11.2.0.3.0

      RDBMS Required Support Files for Instant Client 11.2.0.3.0

      SQLJ Runtime 11.2.0.3.0

      Database Workspace Manager 11.2.0.3.0

      RDBMS Required Support Files Runtime 11.2.0.3.0

      Oracle Globalization Support 11.2.0.3.0

      Exadata Storage Server 11.2.0.1.0

      Provisioning Advisor Framework 10.2.0.4.3

      Enterprise Manager Database Plugin -- Repository Support 11.2.0.3.0

      Enterprise Manager Repository Core Files 10.2.0.4.4

      Enterprise Manager Database Plugin -- Agent Support 11.2.0.3.0

      Enterprise Manager Grid Control Core Files 10.2.0.4.4

      Enterprise Manager Common Core Files 10.2.0.4.4

      Enterprise Manager Agent Core Files 10.2.0.4.4

      RDBMS Required Support Files 11.2.0.3.0

      regexp 2.1.9.0.0

      Agent Required Support Files 10.2.0.4.3

      Oracle 11g Warehouse Builder Required Files 11.2.0.3.0

      Oracle Notification Service (eONS) 11.2.0.3.0

      Oracle Text Required Support Files 11.2.0.3.0

      Parser Generator Required Support Files 11.2.0.3.0

      Oracle Database 11g Multimedia Files 11.2.0.3.0

      Oracle Multimedia Java Advanced Imaging 11.2.0.3.0

      Oracle Multimedia Annotator 11.2.0.3.0

      Oracle JDBC/OCI Instant Client 11.2.0.3.0

      Oracle Multimedia Locator RDBMS Files 11.2.0.3.0

      Precompiler Required Support Files 11.2.0.3.0

      Oracle Core Required Support Files 11.2.0.3.0

      Sample Schema Data 11.2.0.3.0

      Oracle Starter Database 11.2.0.3.0

      Oracle Message Gateway Common Files 11.2.0.3.0

      Oracle XML Query 11.2.0.3.0

      XML Parser for Oracle JVM 11.2.0.3.0

      Oracle Help For Java 4.2.9.0.0

      Installation Plugin Files 11.2.0.3.0

      Enterprise Manager Common Files 10.2.0.4.3

      Expat libraries 2.0.1.0.1

      Deinstallation Tool 11.2.0.3.0

      Oracle Quality of Service Management (Client) 11.2.0.3.0

      Perl Modules 5.10.0.0.1

      JAccelerator (COMPANION) 11.2.0.3.0

      Oracle Containers for Java 11.2.0.3.0

      Perl Interpreter 5.10.0.0.2

      Oracle Net Required Support Files 11.2.0.3.0

      Secure Socket Layer 11.2.0.3.0

      Oracle Universal Connection Pool 11.2.0.3.0

      Oracle JDBC/THIN Interfaces 11.2.0.3.0

      Oracle Multimedia Client Option 11.2.0.3.0

      Oracle Java Client 11.2.0.3.0

      Character Set Migration Utility 11.2.0.3.0

      Oracle Code Editor 1.2.1.0.0I

      PL/SQL Embedded Gateway 11.2.0.3.0

      OLAP SQL Scripts 11.2.0.3.0

      Database SQL Scripts 11.2.0.3.0

      Oracle Locale Builder 11.2.0.3.0

      Oracle Globalization Support 11.2.0.3.0

      SQL*Plus Files for Instant Client 11.2.0.3.0

      Required Support Files 11.2.0.3.0

      Oracle Database User Interface 2.2.13.0.0

      Oracle ODBC Driver 11.2.0.3.0

      Oracle Notification Service 11.2.0.3.0

      XML Parser for Java 11.2.0.3.0

      Oracle Security Developer Tools 11.2.0.3.0

      Oracle Wallet Manager 11.2.0.3.0

      Cluster Verification Utility Common Files 11.2.0.3.0

      Oracle Clusterware RDBMS Files 11.2.0.3.0

      Oracle UIX 2.2.24.6.0

      Enterprise Manager plugin Common Files 11.2.0.3.0

      HAS Common Files 11.2.0.3.0

      Precompiler Common Files 11.2.0.3.0

      Installation Common Files 11.2.0.3.0

      Oracle Help for the  Web 2.0.14.0.0

      Oracle LDAP administration 11.2.0.3.0

      Buildtools Common Files 11.2.0.3.0

      Assistant Common Files 11.2.0.3.0

      Oracle Recovery Manager 11.2.0.3.0

      PL/SQL 11.2.0.3.0

      Generic Connectivity Common Files 11.2.0.3.0

      Oracle Database Gateway for ODBC 11.2.0.3.0

      Oracle Programmer 11.2.0.3.0

      Oracle Database Utilities 11.2.0.3.0

      Enterprise Manager Agent 10.2.0.4.3

      SQL*Plus 11.2.0.3.0

      Oracle Netca Client 11.2.0.3.0

      Oracle Multimedia Locator 11.2.0.3.0

      Oracle Call Interface (OCI) 11.2.0.3.0

      Oracle Multimedia 11.2.0.3.0

      Oracle Net 11.2.0.3.0

      Oracle XML Development Kit 11.2.0.3.0

      Database Configuration and Upgrade Assistants 11.2.0.3.0

      Oracle JVM 11.2.0.3.0

      Oracle Advanced Security 11.2.0.3.0

      Oracle Internet Directory Client 11.2.0.3.0

      Oracle Enterprise Manager Console DB 11.2.0.3.0

      HAS Files for DB 11.2.0.3.0

      Oracle Net Listener 11.2.0.3.0

      Oracle Text 11.2.0.3.0

      Oracle Net Services 11.2.0.3.0

      Oracle Database 11g 11.2.0.3.0

      Oracle OLAP 11.2.0.3.0

      Oracle Spatial 11.2.0.3.0

      Oracle Partitioning 11.2.0.3.0

      Enterprise Edition Options 11.2.0.3.0

-----------------------------------------------------------------------------

 

 

Instantiating scripts for add node

.                                                                 1% Done.

Instantiation of add node scripts complete

 

Copying to remote nodes

...............................................................................................                                 96% Done.

Home copied to new nodes

 

Saving inventory on nodes

.                                                               100% Done.

Save inventory complete

WARNING:

The following configuration scripts need to be executed as the "root" user in each new cluster node. Each script in the list below is followed by a list of nodes.

/u02/ db_1/root.sh #On nodes His-DB-A

To execute the configuration scripts:

    1. Open a terminal window

    2. Log in as "root"

    3. Run the scripts in each cluster node

   

The Cluster Node Addition of /u01/app/oracle/product/11.2.0/db_1 was successful.

Please check '/tmp/silentInstall.log' for more details.

按照提示在新增节点执行root.sh脚本之后database软件扩展完毕

 

注：如果是rac中坏掉一个节点（如上述实验案例），重新添加回来的节点扩展完grid和database软件之后，无需再进行dbca创建实例。如果是在rac基础上新加一个节点，扩展完grid和database之后，还需要dbca创建实例）