Oracle21.3 active data guard（ADG）配置
环境介绍：
OS :centos8.3
oracle: 21.3
此次文档搭建的是CDB级别的ADG。Oracle从21.7版本开始支持PDB级别的ADG，不在这篇文章中测试验证，后续有时间再安排更新。
以下是主要的配置步骤：
1、主备开启归档模式
SQL>shutdown immediate
数据库已经关闭。
已经卸载数据库。
ORACLE 例程已经关闭。
SQL> startup mount;
ORACLE 例程已经启动。
Total System Global Area 5301599856 bytes
Fixed Size 9698928 bytes
Variable Size 1006632960 bytes
Database Buffers 4278190080 bytes
Redo Buffers 7077888 bytes
数据库装载完毕。
SQL> alter database archivelog;
数据库已更改。
SQL> alter database open;
数据库已更改。
SQL> show pdbs;
SQL> archive log list;
数据库日志模式 存档模式
自动存档 启用
存档终点 USE_DB_RECOVERY_FILE_DEST
最早的联机日志序列 1
下一个存档日志序列 3
当前日志序列 3
2、主备配置TNS
itsm_pri =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.xx.xx)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = itsmsrv)
)
)
itsm_std =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.xx.xx)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = itsmsrv)
)
)
3、配置静态监听
vi listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = ITSMPROD)
(ORACLE_HOME = /OSdata/oracle/app/product/21.3.0/db_1)
(SID_NAME = ITSMPROD)
)
)
# lsnrctl reload
# lsnrctl status
4、主备开启强制日志和闪回
SQL> alter database force logging;
SQL> shutdown immediate
SQL> startup mount;
SQL> alter database flashback on;
SQL> alter database open;
SQL> select flashback_on,FORCE_LOGGING from v$database;
FLASHBACK_ON FORCE_LOGGING
------------------ ---------------------------------------
YES YES
5、主库添加standb redolog
添加standby日志组
alter database add standby logfile group 4 '/OSdata/oradata/ITSM/std_redo04.log' size 200m;
alter database add standby logfile group 5 '/OSdata/oradata/ITSM/std_redo05.log' size 200m;
alter database add standby logfile group 6 '/OSdata/oradata/ITSM/std_redo06.log' size 200m;
alter database add standby logfile group 7 '/OSdata/oradata/ITSM/std_redo07.log' size 200m;
select group#,sequence#,status, bytes/1024/1024 from v$standby_log;
6、配置主备库参数文件
主库配置参数文件
主库配置参数文件1：
alter system set db_unique_name=PRODITSM sid='*' scope=spfile;
alter system set log_file_name_convert= '/OSdata/oradata/ITSM','/OSdata/oradata/ITSM' sid='*' scope=spfile;
alter system set db_file_name_convert= '/OSdata/oradata/ITSM/ITSMPROD','/OSdata/oradata/ITSM/ITSMPROD','/OSdata/oradata/ITSM/pdbseed','/OSdata/oradata/ITSM/pdbseed','/OSdata/oradata/ITSM','/OSdata/oradata/ITSM' sid='*' scope=spfile;
alter system set service_names=itsmsrv sid='*' scope=spfile;
主库开启闪回：
alter system set db_recovery_file_dest_size=100G sid='*' scope=both; （生产环境根据实际情况调整大小）
--alter system set db_recovery_file_dest='D:\flashbackon' sid='*' scope=both;
shutdown immediate
startup mount;
alter database flashback on;
alter database open;
检查flashback结果：
select flashback_on,FORCE_LOGGING from v$database;
主库配置参数文件2：
alter system set log_archive_config='DG_CONFIG=(PRODITSM,STDITSM)' sid='*' scope=both;
alter system set log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=PRODITSM' sid='*' scope=both;
alter system set log_archive_dest_2='SERVICE=itsm_std LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STDITSM' sid='*' scope=both;
alter system set log_archive_dest_state_1=ENABLE sid='*' scope=both;
alter system set log_archive_dest_state_2=ENABLE sid='*' scope=both;
--# Standby role Parameters
alter system set FAL_SERVER=STDITSM sid='*' scope=both;
alter system set FAL_CLIENT=PRODITSM sid='*' scope=both;
alter system set STANDBY_FILE_MANAGEMENT=AUTO sid='*' scope=both;
备库配置参数文件
备库参数文件修改
alter system set db_unique_name=STDITSM sid='*' scope=spfile;
alter system set log_file_name_convert= '/OSdata/oradata/ITSM','/OSdata/oradata/ITSM' sid='*' scope=spfile;
alter system set db_file_name_convert= '/OSdata/oradata/ITSM/ITSMPROD','/OSdata/oradata/ITSM/ITSMPROD','/OSdata/oradata/ITSM/pdbseed','/OSdata/oradata/ITSM/pdbseed','/OSdata/oradata/ITSM','/OSdata/oradata/ITSM' sid='*' scope=spfile;
alter system set service_names=itsmsrv sid='*' scope=spfile;
开启强制日志功能
alter database force logging;
备库开启闪回：
alter system set db_recovery_file_dest_size=100G sid='*' scope=both; （生产环境根据实际情况调整大小）
--alter system set db_recovery_file_dest='D:\flashbackon' sid='*' scope=both;
shutdown immediate
startup mount;
alter database flashback on;
alter database open;
--检查flashback结果：
select flashback_on,FORCE_LOGGING from v$database;
备库参数修改2
alter system set log_archive_config='DG_CONFIG=(PRODITSM,STDITSM)' sid='*' scope=both;
alter system set log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=STANDBY' sid='*' scope=both;
alter system set log_archive_dest_2='SERVICE=itsm_pri LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=PRODUCTION' sid='*' scope=both;
alter system set log_archive_dest_state_1=ENABLE sid='*' scope=both;
alter system set log_archive_dest_state_2=DEFER sid='*' scope=both;
--# #Standby Database Standby role parameters
alter system set FAL_SERVER=PRODITSM sid='*' scope=both;
alter system set FAL_CLIENT=STDITSM sid='*' scope=both;
alter system set STANDBY_FILE_MANAGEMENT=AUTO sid='*' scope=both;
7、备库启动到nomount状态进行搭建
备库启动到nomount状态
shutdown immediate;
startup nomount;
在线搭建DG
rman target sys/xxx@itsm_pri auxiliary sys/xxx@itsm_std
duplicate target database for standby from active database nofilenamecheck dorecover;
8、启动备库到只读状态
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED MOUNTED
3 ITSMPROD MOUNTED
SQL> alter database open;
数据库已更改。
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 ITSMPROD MOUNTED
SQL> select database_role from v$database;
DATABASE_ROLE
----------------
PHYSICAL STANDBY
SQL> alter pluggable database ITSMPROD open read only;
插接式数据库已变更。
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 ITSMPROD READ ONLY NO
9、检查状态
主库：
SQL> select process,status,sequence# from v$managed_standby;
PROCESS STATUS SEQUENCE#
--------- ------------ ----------
DGRD ALLOCATED 0
ARCH CONNECTED 0
DGRD ALLOCATED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
ARCH CLOSING 3
DGRD ALLOCATED 0
LNS CONNECTED 0
LNS WRITING 7
备库：
SQL> select process,status,sequence# from v$managed_standby;
PROCESS STATUS SEQUENCE#
--------- ------------ ----------
ARCH CONNECTED 0
DGRD ALLOCATED 0
DGRD ALLOCATED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
RFS IDLE 0
RFS IDLE 7
--启动实时应用
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
SQL> select process,status,sequence# from v$managed_standby;
PROCESS STATUS SEQUENCE#
--------- ------------ ----------
ARCH CONNECTED 0
DGRD ALLOCATED 0
DGRD ALLOCATED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
ARCH CLOSING 12
RFS IDLE 0
RFS IDLE 13
MRP0 APPLYING_LOG 13
问题处理
RMAN
-04006: 来自辅助数据库的错误: ORA-01017: invalid username/password; logon denied
该问题主要是由于TNS的服务名配置错误导致。