Oracle12c-ADG搭建

2019/03/07 18:03
阅读数 154

实验环境:

角色 IP hostname CDB name db_unique_name pdb name 版本
192.168.0.115 Node11 cdb1 cdb_p pdb1
12.2.0.1.0
192.168.0.244 Node12 cdb1 cdb_s pdb1
12.2.0.1.0


1. /etc/hosts配置

1192.168.0.115 Node11
1192.168.0.244 Node12

2. 主库force logging

sqlplus / as sysdba

SQL> alter database force logging;
SQL> select force_logging from v$database;

3. 主库添加standby redo logfile(连接到CDB$ROOT中执行)

SQL> select member from v$logfile;

/data/app/oracle/oradata/cdb1/redo03.log
/data/app/oracle/oradata/cdb1/redo02.log
/data/app/oracle/oradata/cdb1/redo01.log

Standby redo log组数公式>=(每个instance日志组个数+1)*instance个数

假如只有一个节点,这个节点有三组redolog,
所以Standby redo log组数>=(3+1)*1 == 4
所以至少需要创建4组Standby redo log

添加4(3+1)个standby logfile

alter database add standby logfile group 4 '/data/app/oracle/oradata/standbylog/standby_redo04' size 50m;
alter database add standby logfile group 5 '/data/app/oracle/oradata/standbylog/standby_redo05' size 50m;
alter database add standby logfile group 6 '/data/app/oracle/oradata/standbylog/standby_redo06' size 50m;
alter database add standby logfile group 7 '/data/app/oracle/oradata/standbylog/standby_redo07' size 50m;

SQL> set pagesize 100
SQL> col member for a60
SQL> select group#,member from v$logfile order by group#;

4、主备 配置tnsnames.ora

LISTENER_CDB1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.115)(PORT = 1521))


CDB_P =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.115)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = cdb1)
)
)

CDB_S =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.244)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = cdb1)
)
)

5. 主备配置 listener.ora

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = cdb1)
(SID_NAME = cdb1)
(ORACLE_HOME = /data/app/oracle/product/12.2.0.1.0/db_1)
#(PROGRAM = extproc)
#(ENVS = "EXTPROC_DLLS=ONLY:/data/app/oracle/product/12.2.0.1.0/db_1/bin/oraclr12.dll")
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.244)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)

ADR_BASE_LISTENER = /data/app/oracle

重启监听
  lsnrctl reload

测试
  tnsping cdb_p
  tnsping cdb_s

6. 打开归档

SQL> archive log list;
SQL> shutdown immediate;
SQL> startup mount;
SQL> alter database archivelog;
SQL> alter database open;

7.修改pfile文件

create pfile='/data/app/oracle/product/12.2.0.1.0/db_1/dbs/cdb1pfile.ora' from spfile;

vim cdb1pfile.ora

*.db_name='cdb1'
*.db_unique_name='cdb_p'
*.log_archive_config='dg_config=(cdb_p,cdb_s)'
*.log_archive_dest_1='location=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=cdb_p'
*.log_archive_dest_2='service=cdb_s valid_for=(online_logfiles,primary_role)  lgwr affirm sync db_unique_name=cdb_s'
*.log_archive_dest_state_1=enable
*.log_archive_dest_state_2=enable
*.standby_file_management='auto'
*.fal_server='cdb_s'

如果主备库CDB名称不同,还需要加如下参数:
*.DB_FILE_NAME_CONVERT='cdb1','dave'
*.LOG_FILE_NAME_CONVERT='cdb1','dave'
SQL> shutdown immediate
SQL> create spfile from pfile='/data/app/oracle/product/12.2.0.1.0/db_1/dbs/cdb1pfile.ora';
SQL> startup

8. 拷贝密码文件到备库

cd $ORACLE_HOME/dbs
scp orapwcdb1 oracle@Node12:$ORACLE_HOME/dbs  

9. 拷贝pfile 到备库并修改

scp cdb1pfile.ora oracle@Node12:$ORACLE_HOME/dbs
vim cdb1pfile.ora

*.db_unique_name='cdb_s'
*.log_archive_config='dg_config=(cdb_p,cdb_s)'
*.log_archive_dest_1='location=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=cdb_s'
*.log_archive_dest_2='service=cdb_s valid_for=(online_logfiles,primary_role)  lgwr affirm sync db_unique_name=cdb_p'
*.log_archive_dest_state_1=enable
*.log_archive_dest_state_2=enable
*.standby_file_management='auto'
*.fal_server='cdb_s'

注意修改控制文件的路径,也使用新路径。
注意参数:*.db_recovery_file_dest='/data/app/oracle/flash_recovery_area' ,文件夹若不存在,则手动新建。

根据编辑好的pfile生成spfile

create spfile from pfile='/data/app/oracle/product/12.2.0.1.0/db_1/dbs/cdb1pfile.ora';

启动到 nomount 状态

startup nomount

9.开始进行Active duplicate

主:
rman target sys/Sjtsoft123@cdb_p auxiliary sys/Sjtsoft123@cdb_s nocatalog

RMAN> duplicate target database for standby from active database nofilenamecheck;
duplicate target database for standby from active database nofilenamecheck dorecover;
备:
duplicate 完成之后,备库是mount的。
SQL> select open_mode from v$database;
SQL> show pdbs
SQL> alter database open;
SQL> alter pluggable database pdb1 open;
SQL> select open_mode,log_mode,open_mode ,database_role from v$database;

OPEN_MODE LOG_MODE OPEN_MODE DATABASE_ROLE
-------------------- ------------ -------------------- ----------------
READ ONLY ARCHIVELOG READ ONLY PHYSICAL STANDBY

 

10. 备库启动real-time apply:

SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ ONLY

alter database recover managed standby database using current logfile disconnect from session;

SQL> select open_mode from v$database;

OPEN_MODE
--------------------
READ ONLY WITH APPLY

11. 验证DG

主:
SQL> alter pluggable database pdb1 open;
SQL> alter session set container=pdb1;
SQL> create table cndba as select * from dba_users;
SQL> select count(*) from cndba;
SQL> alter system switch logfile; 
备:
SQL> alter session set container=pdb1;
SQL> select count(*) from cndba;

END!

 

12. 查看日志
主:
  tail -100f /data/app/oracle/diag/rdbms/cdb_p/cdb1/trace/alert_cdb1.log
从:
  tail -100f /data/app/oracle/diag/rdbms/cdb_s/cdb1/trace/alert_cdb1.log

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