Oracle 12C Rac到Rac搭建ADG

一、環境介紹
搭建一套ADG災備環境。主庫環境爲12.1.2.0 RAC，備庫同主庫，軟件補丁均已安裝。
二、配置步驟
2.1 歸檔

select log_mode from v$database;  #####是否爲歸檔模式
 alter database force logging;           #####強制歸檔

2.2 主庫standby log

alter database add standby logfile thread 1 group 5  ('+DATADG') size 2048M;
alter database add standby logfile thread 1 group 6  ('+DATADG') size 2048M;
alter database add standby logfile thread 1 group 7  ('+DATADG') size 2048M;
alter database add standby logfile thread 1 group 8  ('+DATADG') size 2048M;
alter database add standby logfile thread 1 group 9  ('+DATADG') size 2048M;
alter database add standby logfile thread 1 group 10 ('+DATADG') size 2048M;
alter database add standby logfile thread 2 group 11    ('+DATADG') size 2048M;
alter database add standby logfile thread 2 group 12    ('+DATADG') size 2048M;
alter database add standby logfile thread 2 group 13    ('+DATADG') size 2048M;
alter database add standby logfile thread 2 group 14    ('+DATADG') size 2048M;
alter database add standby logfile thread 2 group 15    ('+DATADG') size 2048M;
alter database add standby logfile thread 2 group 16    ('+DATADG') size 2048M;

三、文件
3.1 密碼文件

拷貝主庫密碼文件到備庫，最開始放在$ORACLE_HOME/dbs目錄下，後續配置完成後，須要將密碼文件存放在ASM磁盤組中並進行更名。
 scp orapwbmacdb IP: $ORACLE_HOME/dbs1
 ASMCMD> pwcopy /u01/app/oracle/product/12.1.0/dbhome_1/dbs/orapwbmacdb1 +datadg/bmacdbdg/password/orapwbmacdb
copying /u01/app/oracle/product/12.1.0/dbhome_1/dbs/orapwbmacdb1 -> +datadg/bmacdbdg/password/orapwbmacdb

3.2 參數文件

拷貝主庫參數文件到備庫，放在$ORACLE_HOME/dbs目錄下，恢復完成後，須要將參數文件存放在ASM磁盤組中，並經過pfile指定其位置。參數文件內容以下：
*.audit_file_dest='/u01/app/oracle/admin/bmacdb/adump'
*.control_files='+DATADG/BMACDB/control01.ctl','+DATADG/BMACDB/control02.ctl'
*.db_file_name_convert='+DATADG/BMACDB/DATAFILE/','+DATADG/BMACDB/DATAFILE/','+SSDDG/BMACDB/DATAFILE/','+DATADG/BMACDB/DATAFILE/','+DATADG/bmacdb/','+DATADG/BMACDB/DATAFILE/'
*.db_unique_name='bmacdbdg'
*.log_archive_config='DG_CONFIG=(bmacdb,bmacdbdg)'
*.log_archive_dest_1='LOCATION=+ARCHDG VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=bmacdbdg'
*.log_archive_dest_2='SERVICE=BMACDB1 ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=BMACDB'
*.log_file_name_convert='+SSDDG/bmacdb/','+LOGDG/BMACDB/ONLINELOG/'
*.fal_server='BMACDB'
以上參數時咱們須要修改的地方。

3.3 目錄結構

mkdir -p /u01/app/oracle/admin/bmacdb/adump
ASM：
+DATADG/BMACDB/DATAFILE
+LOGDG/BMACDB/ONLINELOG
建立完目錄結構後，啓動數據庫到nomount狀態。
startup nomount

3.4 配置監聽

在配置ADG開始階段，須要在備庫靜態註冊監聽，搭建完成後，能夠將靜態註冊信息刪掉。靜態註冊信息以下：/u01/app/12.1.0/grid/network/admin/listener.ora
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = bmacdbdg)
      (ORACLE_HOME = /u01/app/oracle/product/12.1.0/dbhome_1)
      (SID_NAME = bmacdb1)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = LISTENER))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = IP地址)(PORT = 1521))
    )
  )
配置完監聽後啓動監聽，靜態監聽信息以下：
Service "bmacdbdg" has 1 instance(s).
  Instance "bmacdb1", status UNKNOWN, has 1 handler(s) for this service...
主庫鏈接串配置
主庫tnsnames.ora新增到備庫的鏈接串，而且在RAC兩個節點同時新增：
BMACDBDG =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = IP地址)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = bmacdbdg)
    )
  )
配置完成後，進行連通性測試：
sqlplus sys/password@BMACDBDG as sysdba
SQL*Plus: Release 12.1.0.2.0 Production on Tue Jun 18 14:28:16 2019
Copyright (c) 1982, 2014, Oracle.  All rights reserved.

備庫鏈接串配置
備庫tnsnames.ora新增到主庫的鏈接串，而且在RAC兩個節點同時新增：
BMACDB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = IP地址)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = bmacdb)
    )
  )
配置完成後，進行連通性測試：
sqlplus sys/password@BMACDB as sysdba
SQL*Plus: Release 12.1.0.2.0 Production on Tue Jun 18 14:29:29 2019
Copyright (c) 1982, 2014, Oracle.  All rights reserved.

四、恢復備庫

source /home/oracle/.profile 
rman target sys/password@BMACDB auxiliary sys/password@BMACDBDG <<EOF
run
{
allocate channel cl1 type disk;
allocate auxiliary channel c1 type disk;
duplicate target database for standby from active database nofilenamecheck;
release channel c1;
release channel cl1;
}
EOF
給腳本授予執行權限並執行腳本：
chmod +x dg.sh
nohup ./dg.sh &

五、修改主庫參數

alter system set log_archive_config='dg_config=(bmacdb,bmacadg,bmacdg,bmacdbdg)';
alter system set log_archive_dest_4='service=BMACDBDG async valid_for=(online_logfiles,primary_role) db_unique_name=bmacdbdg';

六、備庫spfile

SQL> create spfile ='+datadg/bmacdbdg/spfilebmacdb.ora' from pfile;

File created.
oracle@bmacdrdb1:/home/oracle>cd $ORACLE_HOME/dbs
oracle@bmacdrdb1:/u01/app/oracle/product/12.1.0/dbhome_1/dbs>cat initbmacdb1.ora
spfile ='+datadg/bmacdbdg/spfilebmacdb.ora'

七、備庫RAC添加資源

srvctl add database -db bmacdbdg -dbname bmacdb -oraclehome /u01/app/oracle/product/12.1.0/dbhome_1 -dbtype RAC -role PHYSICAL_STANDBY
srvctl add instance -db bmacdbdg -instance bmacdb1 -node bmacdrdb1 
srvctl add instance -db bmacdbdg -instance bmacdb2 -node bmacdrdb2 
srvctl modify database -db bmacdbdg -spfile '+datadg/bmacdbdg/spfilebmacdb.ora' -pwfile '+datadg/bmacdbdg/password/orapwbmacdb'
srvctl modify database -db bmacdbdg -diskgroup DATADG,LOGDG
備庫配置信息：
oracle@bmacdrdb1:/home/oracle>srvctl config database -d bmacdbdg
Database unique name: bmacdbdg
Database name: bmacdb
Oracle home: /u01/app/oracle/product/12.1.0/dbhome_1
Oracle user: oracle
Spfile: +datadg/bmacdbdg/spfilebmacdb.ora
Password file: +datadg/bmacdbdg/password/orapwbmacdb
Domain: 
Start options: open
Stop options: immediate
Database role: PHYSICAL_STANDBY
Management policy: AUTOMATIC
Server pools: 
Disk Groups: DATADG,LOGDG
Mount point paths: 
Services: 
Type: RAC
Start concurrency: 
Stop concurrency: 
OSDBA group: dba
OSOPER group: oper
Database instances: bmacdb1,bmacdb2
Configured nodes: bmacdrdb1,bmacdrdb2
Database is administrator managed

八、應用日誌

alter database recover managed standby database disconnect from session;
alter database recover managed standby database cancel;
alter database open;
alter database recover managed standby database using current logfile disconnect;
select open_Mode,DATABASE_ROLE from v$database;

OPEN_MODE            DATABASE_ROLE
-------------------- ----------------
READ ONLY WITH APPLY PHYSICAL STANDBY