把 Oracle 数据库从 Windows 系统迁移到 Linux Oracle Rac 集群环境（2）——将数据库转换为集群模式

一、查看数据库集群属性

-- 查看数据库集群属性
SQL> show parameter cluster

NAME				            TYPE	    VALUE
------------------------------------ ----------- ------------------------------
cluster_database		         boolean	 FALSE  -- 集群开关：关闭
cluster_database_instances	     integer	     1   -- 实例数量为1
cluster_interconnects		     string

-- 查看实例的属性
SQL> show parameter instance

NAME				     		TYPE	 VALUE
------------------------------------ ----------- ------------------------------
active_instance_count		     integer
cluster_database_instances	     integer	 	1
instance_groups 		     	string
instance_name			     	string	 	hisdb1
instance_number 		     	integer	 		0   -- 独占版的实例
instance_type			     	string	 	RDBMS
open_links_per_instance 	     integer	 	4
parallel_instance_group 	     string
parallel_server_instances	     integer	 	1

二、修改集群参数

1、在节点 rac1 上执行如下命令

-- =================================================================================
alter system set cluster_database=true scope=spfile;
alter system set cluster_database_instances=2 scope=spfile;
alter system set instance_number=1 scope=spfile sid='hisdb1';
alter system set thread=1 scope=spfile sid='hisdb1';
alter system set undo_tablespace=undotbs1 scope=spfile sid='hisdb1';
-- =================================================================================
-- =================================================================================
-- =================================================================================

SQL> 
alter system set cluster_database=true scope=spfile;
alter system set cluster_database_instances=2 scope=spfile;
alter system set instance_number=1 scope=spfile sid='hisdb1';
alter system set thread=1 scope=spfile sid='hisdb1';
alter system set undo_tablespace=undotbs1 scope=spfile sid='hisdb1';

System altered.

2、创建节点 rac2 所需的 undo表空间

SQL> show parameter db_creat

NAME				     		TYPE	 VALUE
------------------------------------ ----------- ------------------------------
db_create_file_dest		     	string
db_create_online_log_dest_1	     string
db_create_online_log_dest_2	     string
db_create_online_log_dest_3	     string
db_create_online_log_dest_4	     string
db_create_online_log_dest_5	     string

-- 用于指定 Oracle 数据库服务器创建数据文件的缺省路径
SQL> alter system set db_create_file_dest='+DATA';
System altered.

-- 创建表空间 undotbs2
SQL> create undo tablespace undotbs2 datafile size 500M;
Tablespace created.

-- 查看数据文件
SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
+DATA/hisdb/datafile/system.270.1107594961
+DATA/hisdb/datafile/sysaux.271.1107594961
+DATA/hisdb/datafile/undotbs1.272.1107594961
+DATA/hisdb/datafile/users.275.1107594963
+DATA/hisdb/datafile/ts001.273.1107594963
+DATA/hisdb/datafile/ts001.274.1107594963
+DATA/hisdb/datafile/undotbs2.280.1107605935

7 rows selected.

3、创建节点 rac2 所需的日志文件

-- 查看日志文件
SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
+DATA/hisdb/onlinelog/redo05a.log
+DATA/hisdb/onlinelog/redo06a.log
+DATA/hisdb/onlinelog/redo07a.log

-- 创建日志文件
alter database add logfile thread 2 group 1 '+data/hisdb/onlinelog/redo01.log' size 50m;
alter database add logfile thread 2 group 2 '+data/hisdb/onlinelog/redo02.log' size 50m;
alter database add logfile thread 2 group 3 '+data/hisdb/onlinelog/redo03.log' size 50m;

-- 查看日志文件
SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
+DATA/hisdb/onlinelog/redo01.log
+DATA/hisdb/onlinelog/redo02.log
+DATA/hisdb/onlinelog/redo05a.log
+DATA/hisdb/onlinelog/redo06a.log
+DATA/hisdb/onlinelog/redo07a.log
+DATA/hisdb/onlinelog/redo03.log

6 rows selected.

4、设置节点 rac2 的集群属性

-- ============================================================================================
alter system set instance_number=2 scope=spfile sid='hisdb2';
alter system set thread=2 scope=spfile sid='hisdb2';
alter system set undo_tablespace=undotbs2 scope=spfile sid='hisdb2';
alter database enable thread 2;
-- ============================================================================================
-- ============================================================================================
SQL> alter system set instance_number=2 scope=spfile sid='hisdb2';
SQL> alter system set thread=2 scope=spfile sid='hisdb2';
SQL> alter system set undo_tablespace=undotbs2 scope=spfile sid='hisdb2';

SQL> alter database enable thread 2;

5、在节点 rac1 重启实例，然后在 rac2 启动实例

-- 节点1
-- 停库
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
-- 启动实例
SQL> startup
ORACLE instance started.

Total System Global Area  638853120 bytes
Fixed Size		    2255952 bytes
Variable Size		  494928816 bytes
Database Buffers	  134217728 bytes
Redo Buffers		    7450624 bytes
Database mounted.
Database opened.


-- 节点2
SQL> startup
ORACLE instance started.

Total System Global Area  638853120 bytes
Fixed Size		    2255952 bytes
Variable Size		  494928816 bytes
Database Buffers	  134217728 bytes
Redo Buffers		    7450624 bytes
Database mounted.
Database opened.

三、添加数据库与实例信息到 srvctl

对于 dbca 创建的数据库，srvctl 中包含了数据库和实例的信息。但对于通过备份恢复的数据库，srvctl 中不包含数据库和实例信息。所以，需要手动将 database 信息和实例信息添加到 srvctl 管理器中。

[[email protected] ~]$ crs_stat -t
Name           Type           Target    State     Host        
------------------------------------------------------------
ora.BAK.dg     ora....up.type ONLINE    ONLINE    rac1        
ora.DATA.dg    ora....up.type ONLINE    ONLINE    rac1        
ora....ER.lsnr ora....er.type ONLINE    ONLINE    rac1        
ora....N1.lsnr ora....er.type ONLINE    ONLINE    rac1        
ora.OCR.dg     ora....up.type ONLINE    ONLINE    rac1        
ora.asm        ora.asm.type   ONLINE    ONLINE    rac1        
ora.cvu        ora.cvu.type   ONLINE    ONLINE    rac1        
ora.gsd        ora.gsd.type   OFFLINE   OFFLINE               
ora.mydb.db    ora....se.type OFFLINE   OFFLINE               
ora....network ora....rk.type ONLINE    ONLINE    rac1        
ora.oc4j       ora.oc4j.type  ONLINE    ONLINE    rac1        
ora.ons        ora.ons.type   ONLINE    ONLINE    rac1        
ora....SM1.asm application    ONLINE    ONLINE    rac1        
ora....C1.lsnr application    ONLINE    ONLINE    rac1        
ora.rac1.gsd   application    OFFLINE   OFFLINE               
ora.rac1.ons   application    ONLINE    ONLINE    rac1        
ora.rac1.vip   ora....t1.type ONLINE    ONLINE    rac1        
ora....SM2.asm application    ONLINE    ONLINE    rac2        
ora....C2.lsnr application    ONLINE    ONLINE    rac2        
ora.rac2.gsd   application    OFFLINE   OFFLINE               
ora.rac2.ons   application    ONLINE    ONLINE    rac2        
ora.rac2.vip   ora....t1.type ONLINE    ONLINE    rac2        
ora.scan1.vip  ora....ip.type ONLINE    ONLINE    rac1    

执行以下操作，必须在 oracle 用户下执行：

# 切换为 oracle 用户
[[email protected] admin]$ su - oracle
Password: 
Last login: Mon Jun 20 17:38:23 CST 2022 on pts/0

# 删除原来的数据库信息
[[email protected] dbs]$ srvctl remove database -d mydb
Remove the database mydb? (y/[n]) y

# 添加数据库信息
[[email protected] ~]$ srvctl add database -d hisdb -o /u01/app/oracle/product/11.2.0/db_1 -p +DATA/hisdb/spfilehisdb.ora
# -d db_unique_name; -o oracle_home; -p spfile_path

# 添加实例信息
[[email protected] ~]$ srvctl add instance -d hisdb -i hisdb1 -n rac1
[[email protected] ~]$ srvctl add instance -d hisdb -i hisdb2 -n rac2

# 启动数据库
[[email protected] dbs]$ srvctl start database -d hisdb

# 使数据库和实例自动启动
[[email protected] ~]$ srvctl enable database -d hisdb
PRCC-1010 : hisdb was already enabled
PRCR-1002 : Resource ora.hisdb.db is already enabled

[[email protected] ~]$ srvctl enable instance -d hisdb -i hisdb1
[[email protected] ~]$ srvctl enable instance -d hisdb -i hisdb2


[[email protected] ~]$ crs_stat -t
Name           Type           Target    State     Host        
------------------------------------------------------------
ora.BAK.dg     ora....up.type ONLINE    ONLINE    rac1        
ora.DATA.dg    ora....up.type ONLINE    ONLINE    rac1        
ora....ER.lsnr ora....er.type ONLINE    ONLINE    rac1        
ora....N1.lsnr ora....er.type ONLINE    ONLINE    rac1        
ora.OCR.dg     ora....up.type ONLINE    ONLINE    rac1        
ora.asm        ora.asm.type   ONLINE    ONLINE    rac1        
ora.cvu        ora.cvu.type   ONLINE    ONLINE    rac1        
ora.gsd        ora.gsd.type   OFFLINE   OFFLINE               
ora.hisdb.db   ora....se.type ONLINE    ONLINE    rac1        
ora....network ora....rk.type ONLINE    ONLINE    rac1        
ora.oc4j       ora.oc4j.type  ONLINE    ONLINE    rac1        
ora.ons        ora.ons.type   ONLINE    ONLINE    rac1        
ora....SM1.asm application    ONLINE    ONLINE    rac1        
ora....C1.lsnr application    ONLINE    ONLINE    rac1        
ora.rac1.gsd   application    OFFLINE   OFFLINE               
ora.rac1.ons   application    ONLINE    ONLINE    rac1        
ora.rac1.vip   ora....t1.type ONLINE    ONLINE    rac1        
ora....SM2.asm application    ONLINE    ONLINE    rac2        
ora....C2.lsnr application    ONLINE    ONLINE    rac2        
ora.rac2.gsd   application    OFFLINE   OFFLINE               
ora.rac2.ons   application    ONLINE    ONLINE    rac2        
ora.rac2.vip   ora....t1.type ONLINE    ONLINE    rac2        
ora.scan1.vip  ora....ip.type ONLINE    ONLINE    rac1        

四、生成口令文件

# 节点1
cd $ORACLE_HOME/dbs
orapwd file=orapwhisdb1 password=oracle

# 节点2
cd $ORACLE_HOME/dbs
orapwd file=orapwhisdb2 password=oracle