通过ADG技术迁移单实例到rac集群上

通过ADG技术迁移单实例到rac集群上

osc_bf1dhmmd

2019/06/21 16:02

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系统环境：centos6
数据库软件版本：oracle11g
目标：单实例数据库迁移到RAC集群上
过程：首先为单实例数据库搭建ADG到rac一个节点上，然后通过切换主备库将单实例变成备库，rac成为主库，启用第二个节点。

一、搭建单实例数据库
二、搭建rac环境
装GI软件装oracle软件不创建数据库
三、搭建DG架构
1. 主库准备
1.1 检查主库是否是开启归档模式
开启归档
#开启归档模式
#一致性停库
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

#开启到mount状态
SQL> startup mount;
ORACLE instance started.
Total System Global Area 835104768 bytes
Fixed Size 2257840 bytes
Variable Size 541068368 bytes
Database Buffers 289406976 bytes
Redo Buffers 2371584 bytes
Database mounted.

#打开归档模式
SQL> alter database archivelog;
Database altered.

#打开数据库
SQL> alter database open;
Database altered.
#修改归档路径
SQL> alter system set log_archive_dest_1='location=/u02/arcdata';
System altered.

#检查归档是否开启
archive log list

1.2 启用强日志模式
SQL> alter database force logging;
Database altered.

1.3 设置DG相关参数

#检查remote_login_passwordfile 参数（EXCLUSIVE）
SQL> show parameter remote_login_passwordfile
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
remote_login_passwordfile string EXCLUSIVE

#检查standby_file_management 参数（AUTO）
SQL> show parameter standby_file_management
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
standby_file_management string MANUAL
#不是AUTO，修改为AUTO
SQL> alter system set standby_file_management=AUTO scope=both;
System altered.

#检查db_unique_name （有唯一名）
SQL> show parameter db_unique_name
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_unique_name string orasgl

#打开DG开关（orasgl为本库唯一名，orarac为RAC库唯一名）
SQL> alter system set log_archive_config='dg_config=(orasgl,orarac)';
System altered.

#配置本地归档
SQL> alter system set log_archive_dest_1='location=/home/oracle/archlog valid_for=(all_logfiles,all_roles) db_unique_name=orasgl';
System altered.
#激活归档路径1
SQL> alter system set log_archive_dest_state_1='enable';
System altered.

#配置远程归档
SQL> alter system set log_archive_dest_2='service=orarac valid_for=(online_logfiles,primary_role) db_unique_name=orarac';
System altered.
#激活归档路径2
SQL> alter system set log_archive_dest_state_2='enable';
System altered.

#配置fal_client、fal_server
SQL> alter system set fal_client='orasgl';
System altered.

SQL> alter system set fal_server='orarac';
System altered.

#配置文件路径转换（前面为远程库的数据文件路径，后面为本地库的数据文件路径）
SQL> alter system set db_file_name_convert='+RACDATA/oradata/orarac/','/u01/app/oracle/oradata/orasgl/' scope=spfile;
System altered.

SQL> alter system set log_file_name_convert='+RACDATA/oradata/orarac/','/u01/app/oracle/oradata/orasgl/' scope=spfile;
System altered.
#重启数据库，检查scope=spfile选项的配置
SQL> show parameter convert;

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_file_name_convert string +RACDATA/oradata/orarac/, /u01/app/or
acle/oradata/orasgl/
log_file_name_convert string +RACDATA/oradata/orarac/, /u01/app/or
acle/oradata/orasgl/

1.4 将参数文件、密码文件传输给RAC库
#创建pfile文件
SQL> create pfile from spfile;
File created.
#将参数文件传输给rac1节点
cd $ORACLE_HOME/dbs
#将密码文件传输给rac1、rac2节点
scp orapworasgl rac1：$ORACLE_HOME/dbs
scp orapworasgl RAC2: $ORACLE_HOME/dbs

2. 备库准备（rac1）
2.1 将rac1、rac2节点的文件拷贝到指定位置
#rac1节点
mv orapwRAC1 initorasgl.ora $ORACLE_HOME/dbs
mv orapwRAC1 $ORACLE_HOME/dbs
#根据SID修改文件名
#rac1节点
[oracle@rac1 ~]cdcdORACLE_HOME/dbs
[oracle@rac1 dbs]$ mv initorasgl.ora initorarac1.ora
[oracle@rac1 dbs]$ mv orapworasgl orapworarac1
#rac2节点
[oracle@rac2 ~]cdcdORACLE_HOME/dbs
[oracle@rac2 dbs]$ mv orapworasgl orapworarac2
2.2 将pfile修改为适用于备库的参数文件

#依照如下配置做修改
[oracle@rac1 dbs]$ vim initorarac1.ora
--------------------------------------------
*.db_domain=''
*.db_recovery_file_dest_size=4385144832
*.dispatchers='(PROTOCOL=TCP) (SERVICE=orasglXDB)'
*.memory_target=838860800
*.open_cursors=300
*.processes=150
*.undo_tablespace='UNDOTBS1'

#以下参数需要注意

#该参数为数据库名，不可修改
*.db_name='orasgl'
#唯一名，修改为RAC库的唯一名
*.db_unique_name='orarac'
#审计文件所在路径
*.audit_file_dest='/u01/app/oracle/admin/orarac/adump'
#自诊断档案库文件所在路径
*.diagnostic_dest='/u01/app/oracle'
#控制文件放于ASM磁盘组对应位置
*.control_files='+RACDATA/oradata/orarac/control01.ctl','+RACFRA/oracle/fast_recovery_area/orarac/control02.ctl'
#快速恢复区对应路径（直接用磁盘组）
*.db_recovery_file_dest='+RACFRA'
#DG配置，不用改
*.log_archive_config='dg_config=(orasgl,orarac)'
#本地归档路径修改为ASM磁盘组路径，唯一名修改为RAC库唯一名
*.log_archive_dest_1='location=+RACFRA/oracle/archlog valid_for=(all_logfiles,all_roles) db_unique_name=orarac'
#服务名和唯一名修改为单实例库对应的名字
*.log_archive_dest_2='service=orasgl valid_for=(online_logfiles,primary_role) db_unique_name=orasgl'
*.log_archive_dest_state_1='enable'
*.log_archive_dest_state_2='enable'
#修改为RAC库唯一名
*.fal_client='orarac'
#修改为单实例库唯一名
*.fal_server='orasgl'
#与单实例库配置正好相反
*.db_file_name_convert='/u01/app/oracle/oradata/orasgl/','+RACDATA/oradata/orarac/'
#与单实例库配置正好相反
*.log_file_name_convert='/u01/app/oracle/oradata/orasgl/','+RACDATA/oradata/orarac/'
*.remote_login_passwordfile='EXCLUSIVE'
*.standby_file_management='AUTO'
--------------------------------------------
2.3 根据参数文件中出现的路径，创建对应的目录
#本地目录
#rac1节点

[oracle@rac1 dbs]$ mkdir -p /u01/app/oracle/admin/orarac/adump
#rac2节点
[oracle@rac2 ~]$ mkdir -p /u01/app/oracle/admin/orarac/adump
#ASM磁盘组目录（切换至grid用户，在其中一个节点上操作即可）
*********************************************
注：在ASM创建相应目录（归档地址，数据文件，控制文件）很重要rman恢复的时候没有目录会报错
*********************************************
[grid@rac2 ~]$ asmcmd
ASMCMD> cd +RACDATA
ASMCMD> mkdir oradata
ASMCMD> cd oradata
ASMCMD> mkdir orarac

#通过命令检查配置文件中涉及到的目录是否均已创建
#rac1节点
[oracle@rac1 dbs]$ ll /u01/app/oracle/admin/orarac/adump
#rac2节点
[oracle@rac2 ~]$ ll /u01/app/oracle/admin/orarac/adump

2.4 在rac1节点通过pfile启动数据库到nomount状态

[oracle@rac1 dbs]$ sqlplus / as sysdba
startup nomount

3.配置监听
3.1 配置主库监听（xxdb1）
配置主库的listener.ora文件
cd $ORACLE_HOME/network/admin
[oracle@xxdb1 admin]$ vi listener.ora
-------------------------------------------
LISTENER=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.80.11)(PORT=1521))
)

SID_LIST_LISTENER=
(SID_LIST=
(SID_DESC=
(GLOBAL_DBNAME=xxdb1)
(ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME=xxdb1)
)
)
-------------------------------------------
启动监听
$ lsnrctl start
配置主库的tnsnames.ora文件
$ vi tnsnames.ora
-------------------------------------------
xxdb1=
(DESCRIPTION=
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.80.11)(PORT=1521))
)
(CONNECT_DATA=
(SERVER=DEDICATED)
(SERVICE_NAME=xxdb1)
)
)

rac=
(DESCRIPTION=
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.80.12)(PORT=1521))
)
(CONNECT_DATA=
(SERVER=DEDICATED)
(SERVICE_NAME=rac)
)
)
-------------------------------------------
3.2 配置RAC集群监听（ rac）
配置备库的listener.ora文件
注意RAC集群的监听需在grid用户下配置（节点1配置）

#加入静态监听配置
[grid@rac1 ~]$ cd /u01/grid/network/admin/
[grid@rac1 admin]$ vim listener.ora
-------------------------------------
SID_LIST_LISTENER=
(SID_LIST=
(SID_DESC=
(GLOBAL_DBNAME=orarac)
(ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1) #此处为oracle的ORACLE_HOME
(SID_NAME=orarac1)
)
)
-------------------------------------

重载监听

[grid@rac1 admin]$ lsnrctl reload

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 24-DEC-2018 19:19:45

Copyright (c) 1991, 2013, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
The command completed successfully
[grid@rac1 admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 24-DEC-2018 19:19:48

Copyright (c) 1991, 2013, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 24-DEC-2018 13:04:17
Uptime 0 days 6 hr. 15 min. 30 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/rac1/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
Services Summary...
Service "orarac" has 1 instance(s).
Instance "orarac1", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

配置备库的tnsnames.ora文件
在oracle用户下建

[oracle@rac1 ~]$ cd /u01/app/oracle/product/11.2.0/db_1/network/admin/
[oracle@rac1 admin]$ vi tnsnames.ora
-------------------------------------
orasgl=
(DESCRIPTION=
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=TCP)(HOST=172.17.10.209)(PORT=1521))
)
(CONNECT_DATA=
(SERVER=DEDICATED)
(SERVICE_NAME=orasgl)
)
)

orarac=
(DESCRIPTION=
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=TCP)(HOST=172.17.10.203)(PORT=1521))
)
(CONNECT_DATA=
(SERVER=DEDICATED)
(SERVICE_NAME=orarac)
)
)
-------------------------------------

配置完成后传输给rac2节点一份

[oracle@rac1 admin]$ scp tnsnames.ora rac2:/u01/app/oracle/product/11.2.0/db_1/network/admin/
tnsnames.ora 100% 388 0.4KB/s
00:00

3.3 监听连接测试
单实例测试：
[oracle@xxdb1 ~]$ sqlplus sys/oracle@xxdb1 as sysdba
show parameter db_unique_name
[oracle@xxdb1 ~]$ sqlplus sys/oracle@rac as sysdba
show parameter db_unique_name
集群测试：

[oracle@rac1 ~]$ sqlplus sys/oracle@xxdb1 as sysdba
show parameter db_unique_name

[oracle@rac1 ~]$ sqlplus sys/oracle@rac as sysdba
SQL> show parameter db_unique_name
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_unique_name string rac

4. 数据复制
在单实例数据库上通过RMAN连接单实例数据和RAC集群
[oracle@xxdb1 ~]$ rman target sys/oracle@xxdb1 auxiliary sys/oracle@rac

RMAN> duplicate target database for standby from active database;
...
...
#过程略
#复制脚本自动运行完exit退出rman即可
#此时rac1节点库已经是mount状态

可以登录grid用户，查看文件是否复制正确（主要看数据文件和归档文件）

[root@rac2 ~]# su - grid
[grid@rac2 ~]$ asmcmd
ASMCMD> cd +RACDATA/oradata/orarac
ASMCMD> ls
control01.ctl
example01.dbf
redo01.log
redo02.log
redo03.log
sysaux01.dbf
system01.dbf
undotbs01.dbf
users01.dbf

检查归档是否可以正常传输

#主库操作（xxdb1）
SQL> select group#,sequence#,status from v$log;
#切换日志组
SQL> alter system switch logfile;
System altered.
#查看归档是否生成

#备库操作（rac）
grid用户asmcmd查看产生的归档日志是否正确

#验证成功，归档可以正常传输
5. 添加日志组

5.1 主库（xxdb1）添加日志组 （为主库切换为备库做准备）
SQL> show parameter standby_file_management
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
standby_file_management string AUTO
#先改为手动模式
SQL> alter system set standby_file_management=manual;
System altered.

SQL> select a.group#,member,thread#,bytes/1024/1024 MB from vlogfile a, vlogfilea,vlog b where a.group#=b.group#;
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
alter system set standby_file_management=manual;
alter database add standby logfile thread 1 '/u01/app/oracle/oradata/xxdb1/standby01.log' size 50m;
alter database add standby logfile thread 1 '/u01/app/oracle/oradata/xxdb1/standby02.log' size 50m;
alter database add standby logfile thread 1 '/u01/app/oracle/oradata/xxdb1/standby03.log' size 50m;
alter database add logfile thread 2 '/u01/app/oracle/oradata/xxdb1/redo04.log' size 50m;
alter database add logfile thread 2 '/u01/app/oracle/oradata/xxdb1/redo05.log' size 50m;
alter database add logfile thread 2 '/u01/app/oracle/oradata/xxdb1/redo06.log' size 50m;
alter database add standby logfile thread 2 '/u01/app/oracle/oradata/xxdb1/standby04.log' size 50m;
alter database add standby logfile thread 2 '/u01/app/oracle/oradata/xxdb1/standby05.log' size 50m;
alter database add standby logfile thread 2 '/u01/app/oracle/oradata/xxdb1/standby06.log' size 50m;
alter database enable thread 2;
alter system set standby_file_management=auto;
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
备库rac添加standby日志
alter database add standby logfile thread 1 '+RACDATA/oradata/rac/standby01.log' size 50m;
alter database add standby logfile thread 1 '+RACDATA/oradata/rac/standby02.log' size 50m;
alter database add standby logfile thread 1 '+RACDATA/oradata/rac/standby03.log' size 50m;
alter database add logfile thread 2 '+RACDATA/oradata/rac/redo04.log' size 50m;
alter database add logfile thread 2 '+RACDATA/oradata/rac/redo05.log' size 50m;
alter database add logfile thread 2 '+RACDATA/oradata/rac/redo06.log' size 50m;
alter database add standby logfile thread 2 '+RACDATA/oradata/rac/standby04.log' size 50m;
alter database add standby logfile thread 2 '+RACDATA/oradata/rac/standby05.log' size 50m;
alter database add standby logfile thread 2 '+RACDATA/oradata/rac/standby06.log' size 50m;
alter system set standby_file_management=auto;

6.打开数据库，测试数据同步

#在rac1节点操作
#打开数据库
SQL> alter database open;
Database altered.

#开启日志实时应用
SQL> alter database recover managed standby database using current logfile disconnect from session;
Database altered.

#检查日志同步情况
SQL> select sequence#,applied from v$archived_log order by 1;

#在主库（xxdb1）操作更新表，检查同步
#在备库（rac1）检查同步情况
#可以通过以下SQL检查DG备库运行状态
SQL> select * from v$dataguard_stats;

8. 创建spfile到ASM磁盘组

在rac1节点操作

#通过pfile创建spfile

create spfile='+RACDATA/oradata/spfilerac.ora' from pfile='/u01/app/oracle/product/11.2.0/dbhome_1/dbs/initrac1.ora';

#修改rac1节点的pfile
#备份原pfile
[oracle@rac1 dbs]$ cp initorarac1.ora initorarac1.ora_bak
#修改rac1的pfile（清空文件内容，修改为如下内容）
[oracle@rac1 dbs]$ vim initorarac1.ora
-------------------------------------------
spfile='+RACDATA/oradata/spfilerac.ora'
-------------------------------------------

#关闭数据库，重启，验证spfile是否正常

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area 835104768 bytes
Fixed Size 2257840 bytes
Variable Size 541068368 bytes
Database Buffers 289406976 bytes
Redo Buffers 2371584 bytes
Database mounted.
Database opened.

#开启实时同步
SQL> alter database recover managed standby database using current logfile disconnect from session;
Database altered.

#将pfile传给rac2节点，并修改成对应的文件名
[oracle@rac1 dbs]$ scp initrac1.ora rac2:/u01/app/oracle/product/11.2.0/db_1/dbs/initorarac2.ora
initorarac1.ora 100% 43 0.0KB/s
00:00

7. 注册到CRS资源管理

在rac1节点操作即可（oracle用户操作）

#注册数据库
[oracle@orarac01 ~]$ srvctl add database -d rac -n xxdb1 -o /u01/app/oracle/product/11.2.0/dbhome_1 -p +RACDATA/oradata/spfilerac.ora -r
physical_standby -a "RACDATA"
[oracle@orarac01 ~]$
#注册节点
[oracle@orarac01 ~]$ srvctl add instance -d rac -i rac1 -n orarac01
[oracle@orarac01 ~]$ srvctl add instance -d rac -i rac2 -n orarac02
#检查资源配置
[oracle@rac1 ~]$ srvctl config database -d rac

8. 将rac2节点开启
#为rac2节点配置自己的UNDOTBS
#主库（orasgl）操作
SQL> select file_name,bytes/1024/1024 from dba_data_files;

#在主库添加UNDOTBS2，RAC库同步（加完可以切一下日志）
SQL> create undo tablespace undotbs2 datafile '/u01/app/oracle/oradata/xxdb1/undotbs02.dbf' size 100m;
Tablespace created.

#备库（rac）操作
#检查UNDOTBS2是否已经同步过来

SYS@rac1> select file_name from dba_data_files;

FILE_NAME
--------------------------------------------------------------------------------
+RACDATA/oradata/rac/users01.dbf
+RACDATA/oradata/rac/undotbs01.dbf
+RACDATA/oradata/rac/sysaux01.dbf
+RACDATA/oradata/rac/system01.dbf
+RACDATA/oradata/rac/undotbs02.dbf

SYS@rac1>

#将数据库转换为rac模式
注：千万不能漏，漏会报错只能把本地pfile恢复重新来
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
SQL> alter system set cluster_database=true scope=spfile;

SQL> alter system set cluster_database_instances=2 scope=spfile;

SQL> alter system set instance_number=1 scope=spfile sid='rac1';

SQL> alter system set instance_number=2 scope=spfile sid='rac2';

SQL> alter system set thread=1 scope=spfile sid='rac1';

SQL> alter system set thread=2 scope=spfile sid='rac2';

SQL> alter system set undo_tablespace=undotbs1 scope=spfile sid='rac1';

SQL> alter system set undo_tablespace=undotbs2 scope=spfile sid='rac2';
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

#重启数据库（rac1节点）
SQL> shutdown immediate;
SQL> startup

SQL> alter database recover managed standby database using current logfile disconnect from session;
Database altered.

#启动数据库（rac2节点）
注意asm权限
[root@orarac02 ~]# usermod -a -G asmadmin oracle
[root@orarac02 ~]# id oracle
uid=1101(oracle) gid=1000(oinstall) groups=1000(oinstall),1200(asmadmin),1201(asmdba),1300(dba),1301(oper)
[root@orarac02 ~]# id grid
uid=1000(grid) gid=1000(oinstall) groups=1000(oinstall),1200(asmadmin),1201(asmdba),1202(asmoper)

SQL> startup

#测试数据同步

#至此完成DG部分的所有操作
-----------------------------------------------------------------------------------
单实例+ADG+双节点RAC 架构搭建成功
————————————————————————

四、主备切换（主库变为rac架构）

#关闭rac2节点
[oracle@rac1 ~]$ srvctl stop instance -d rac -i rac2

#检查主库（xxdb1）状态
SQL> select database_role,switchover_status from v$database;
DATABASE_ROLE SWITCHOVER_STATUS
---------------- --------------------
PRIMARY TO STANDBY

#将主库（xxdb1）切换为备库
SQL> alter database commit to switchover to physical standby with session shutdown;
Database altered.

#将新备库（xxdb1）启动到mount状态
SQL> startup mount;
ORACLE instance started.
Total System Global Area 835104768 bytes
Fixed Size 2257840 bytes
Variable Size 541068368 bytes
Database Buffers 289406976 bytes
Redo Buffers 2371584 bytes
Database mounted.
#将备库（rac）切换为主库
SQL> alter database commit to switchover to primary;
Database altered.

#将新主库（rac）打开
SQL> alter database open;
Database altered.

#将新备库（xxdb1）打开
SQL> alter database open;
Database altered.
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
备库xxdb1此时是mount状态主库rac起来之后不能查询其他窗口
ora-01219
将备库shutdown，之后再startup，
执行日志实时应用即ok
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
#检查新主备状态
#主库（rac）状态
SQL> select name,database_role,switchover_status from v$database;
NAME DATABASE_ROLE SWITCHOVER_STATUS
--------- ---------------- --------------------
ORASGL PRIMARY TO STANDBY

#备库（xxdb1）状态
SQL> select name,database_role,switchover_status from v$database;
NAME DATABASE_ROLE SWITCHOVER_STATUS
--------- ---------------- --------------------
ORASGL PHYSICAL STANDBY RECOVERY NEEDED

#备库开启日志应用
SQL> alter database recover managed standby database using current logfile disconnect from session;
Database altered.

#开启rac2节点
[oracle@rac1 ~]$ srvctl start instance -d rac -i rac2
#两个节点分别执行切换日志命令
SQL> alter system switch logfile;
#在备库（xxdb1）检查是否有归档过来
ll /u02/arcdata

#测试数据同步
#主库（rac）rac1节点操作
insert
#备库（xxdb1）检查
#主库（rac）rac2节点操作
#备库（xxdb1）检查

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耗时一星期，解决了大大小小各种各样的问题。终于搭成功了 啊啊啊啊啊啊啊啊啊