技术博客 数据库、运维与工程实践笔记

11gR2 RAC手动添加节点数据库实例

2024-01-19ASM / Oracle / RAC

两台服务器构成的Oracle 11gR2 RAC环境中，其中rac1服务器的私有网卡需要更换，所以在rac2服务器上使用dbca创建数据库的时候只创建了本节点的数据库实例(oracledb1)。当rac1服务器私有网卡更换成功，在rac1服务器执行dbca图形化"add Instance"和执行dbca -silent命令添加实例，都收到下面的报错：

[oracle@rac1 ~]$ dbca -silent -addInstance -gdbName oracledb -nodelist rac1 -instanceName oracledb2 -sysDBAUserName sys -sysDBAPassword oracle_Schic1

Look at the log file "/u01/app/oracle/cfgtoollogs/dbca/oracledb.log" for further details.

[oracle@rac1 ~]$ cat /u01/app/oracle/cfgtoollogs/dbca/oracledb.log

"Adding instance" operation on the admin managed database oracledb requires instance configured on local node. There is no instance configured on the local node "rac1".

该操作放在现有的RAC节点rac2上执行应该就可以了。不过下面我们继续讨论手动在rac1上添加oracledb2实例的步骤：

由于rac2运行着oracledb1实例，所以这里先添加rac1的oracledb2实例，之后再做调整。

1.尝试直接在rac1上启动oracledb2实例。

[root@rac1 bin]# su – oracle

[oracle@rac1 ~]$ export ORACLE_SID=oracledb2

[oracle@rac1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Fri Nov 9 02:29:36 2012

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup

ORA-29760: instance_number parameter not specified

     instance_number的内容参考文章：http://space.itpub.net/23135684/viewspace-748572

2.确保rac1的ASM实例加载了相关磁盘组。

[root@rac2 bin]# ./crsctl stat res -t

NAME TARGET STATE SERVER STATE_DETAILS

Local Resources

ora.ARCH.dg

           OFFLINE OFFLINE      rac1                                         
           ONLINE  ONLINE       rac2

ora.DATA.dg

           OFFLINE OFFLINE      rac1                                         
           ONLINE  ONLINE       rac2

……

ora.asm

           ONLINE  ONLINE       rac1                     Started             
           ONLINE  ONLINE       rac2                     Started

……

ora.oracledb.db

  1        ONLINE  ONLINE       rac2                     Open

……

[root@rac2 bin]# ./srvctl start diskgroup -g data -n rac1

[root@rac2 bin]# ./srvctl start diskgroup -g arch -n rac1

[root@rac2 bin]# ./crsctl stat res -t

NAME TARGET STATE SERVER STATE_DETAILS

Local Resources

ora.ARCH.dg

           ONLINE  ONLINE       rac1                                         
           ONLINE  ONLINE       rac2

ora.DATA.dg

           ONLINE  ONLINE       rac1                                         
           ONLINE  ONLINE       rac2

……

3.调整RAC参数文件。

[root@rac2 bin]# su – oracle

[oracle@rac2 ~]$ export ORACLE_SID=oracledb1

[oracle@rac2 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Fri Nov 9 02:34:18 2012

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 – 64bit Production

With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,

Data Mining and Real Application Testing options

SQL> create pfile='/tmp/opfile.txt' from spfile='+DATA/oracledb/spfileoracledb.ora';

File created.

SQL> !vi /tmp/opfile.txt

oracledb1.__db_cache_size=60263759872

oracledb1.__java_pool_size=134217728

oracledb1.__large_pool_size=134217728

oracledb1.__pga_aggregate_target=39728447488

oracledb1.__sga_target=68719476736

oracledb1.__shared_io_pool_size=0

oracledb1.__shared_pool_size=7784628224

oracledb1.__streams_pool_size=0

*.audit_file_dest='/u01/app/oracle/admin/oracledb/adump'

*.audit_trail='db'

*.cluster_database=true

*.compatible='11.2.0.0.0'

*.control_files='+DATA/oracledb/controlfile/current.260.798857565'

*.db_block_size=8192

*.db_create_file_dest='+DATA'

*.db_domain=''

*.db_name='oracledb'

*.diagnostic_dest='/u01/app/oracle'

*.dispatchers='(PROTOCOL=TCP) (SERVICE=oracledbXDB)'

oracledb1.instance_number=1

oracledb2.instance_number=2

*.log_archive_dest_1='LOCATION=+arch'

*.log_archive_format='%t_%s_%r.dbf'

*.open_cursors=300

*.pga_aggregate_target=39625687040

*.processes=5000

*.remote_listener='wstrac.scan.com:1521'

*.remote_login_passwordfile='exclusive'

*.sessions=5505

*.sga_target=68719476736

oracledb1.thread=1

oracledb2.thread=2

oracledb1.undo_tablespace='UNDOTBS1'

oracledb2.undo_tablespace='UNDOTBS2'

~

"/tmp/opfile.txt" 34L, 1103C written

上面加红的部分是新增加的内容。

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> create spfile='+DATA/oracledb/spfileoracledb.ora' from pfile='/tmp/opfile.txt';

File created.

SQL> startup

ORACLE instance started.

Total System Global Area 6.8413E+10 bytes

Fixed Size 2245480 bytes

Variable Size 8053066904 bytes

Database Buffers 6.0264E+10 bytes

Redo Buffers 93609984 bytes

Database mounted.

Database opened.

    增加的参数的含义也参考文章：http://space.itpub.net/23135684/viewspace-748572

4.确保创建了UNDOTBS2表空间。

SQL> select file_id,file_name from dba_data_files;

FILE_ID

FILE_NAME

     4

+DATA/oracledb/datafile/users.259.798857305

     3

+DATA/oracledb/datafile/undotbs1.258.798857305

     2

+DATA/oracledb/datafile/sysaux.257.798857305

FILE_ID

FILE_NAME

     1

+DATA/oracledb/datafile/system.256.798857305

     5

+DATA/oracledb/datafile/undotbs2.266.798863859

5.再次尝试启动rac1上的oracledb2实例。

SQL> startup

ORACLE instance started.

Total System Global Area 6.8413E+10 bytes

Fixed Size 2245480 bytes

Variable Size 6979325080 bytes

Database Buffers 6.1338E+10 bytes

Redo Buffers 93609984 bytes

ORA-01618: redo thread 2 is not enabled – cannot mount

    需要启用 redo thread 2。

6.启用redo thread 2。

以下的操作一定在现存的RAC节点实例上执行（在添加的节点上无法执行），也就是说在rac2节点的oracledb1实例上执行以下命令：

SQL> ALTER DATABASE

2 ADD LOGFILE THREAD 2 GROUP 4

3 ('+DATA') SIZE 256M;

Database altered.

SQL> ALTER DATABASE

2 ADD LOGFILE THREAD 2 GROUP 5

3 ('+DATA') SIZE 256M;

Database altered.

SQL> ALTER DATABASE

2 ADD LOGFILE THREAD 2 GROUP 6

3 ('+DATA') SIZE 256M;

Database altered.

SQL> alter database enable thread 2;

Database altered.

要启动thread 2，必须先为thread 2创建好日志组。

    参考文章：http://space.itpub.net/7199859/viewspace-663572

7.加载rac1 oracledb2实例并打开数据库。

SQL> alter database mount;

Database altered.

SQL> alter database open;

Database altered.

经过以上的步骤，成功为rac1节点添加了oracledb2实例。

8.将实例信息添加到OCR中。

[root@rac1 bin]# su – oracle

[oracle@rac1 ~]$ srvctl add instance -d oracledb -i oracledb2 -n rac1

[oracle@rac1 ~]$ srvctl status database -d oracledb

Instance oracledb2 is not running on node rac1

Instance oracledb1 is running on node rac2

[oracle@rac1 ~]$ srvctl start instance -d oracledb -i oracledb2

[oracle@rac1 ~]$ srvctl status database -d oracledb

Instance oracledb2 is running on node rac1

Instance oracledb1 is running on node rac2

9.调整OCR中实例运行节点。

经过上面的添加后，rac1运行着oracledb2实例，rac2运行着oracledb1实例，执行下面的步骤，使得rac1运行oracledb1实例，rac2运行oracledb2实例。

[oracle@rac1 ~]$ srvctl stop database -d oracledb

[oracle@rac1 ~]$ srvctl remove instance -d oracledb -i oracledb1

Remove instance from the database oracledb? (y/[n]) y

[oracle@rac1 ~]$ srvctl remove instance -d oracledb -i oracledb2

Remove instance from the database oracledb? (y/[n]) y

[oracle@rac1 ~]$ srvctl add instance -d oracledb -i oracledb1 -n rac1

[oracle@rac1 ~]$ srvctl add instance -d oracledb -i oracledb2 -n rac2

[oracle@rac1 ~]$ srvctl start database -d oracledb

[oracle@rac1 ~]$ srvctl status database -d oracledb

Instance oracledb1 is running on node rac1

Instance oracledb2 is running on node rac2

[oracle@rac1 ~]$ srvctl enable database -d oracledb

PRCC-1010 : oracledb was already enabled

PRCR-1002 : Resource ora.oracledb.db is already enabled

[oracle@rac1 ~]$ srvctl enable instance -d oracledb -i oracledb1

[oracle@rac1 ~]$ srvctl enable instance -d oracledb -i oracledb2

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