配置Server Side TAF

实验环境：Oracle 11.2.0.4 RAC
参考MOS文档：
How To Configure Server Side Transparent Application Failover (文档 ID 460982.1)

1.为设置TAF在RAC集群上新建服务
2.启动server_taf服务
3.检查确认服务正在运行
4.找到刚创建服务的service_id
5.根据service_id审查服务的信息
6.给服务添加server side failover参数
7.再次审查服务可以看到Method, Type和Retries值
8.检查已注册的服务的监听信息
9.创建网络服务名
10.测试TAF功能

1.为设置TAF在RAC集群上新建服务

eg: srvctl add service -d rac -s server_taf -r "rac1,rac2" -P BASIC

使用oracle用户在RAC集群上新建服务server_taf:

[oracle@jyrac1 ~]$ srvctl add service -d jyzhao -s server_taf -r "jyzhao1,jyzhao2" -P BASIC
[oracle@jyrac1 ~]$

注意不能使用grid用户操作，如果使用grid 用户执行的话，会报错:

[grid@jyrac1 ~]$ srvctl add service -d jyzhao -s server_taf -r "jyzhao1,jyzhao2" -P BASIC
PRCD-1288 : User is not authorized to create service server_taf for database jyzhao
PRKH-1014 : Current user "grid" is not the oracle owner user "oracle" of oracle home "/opt/app/oracle/product/11.2.0/dbhome_1"

2.启动server_taf服务

eg: srvctl start service -d rac -s server_taf

启动server_taf服务

[oracle@jyrac1 ~]$ srvctl start service -d jyzhao -s server_taf

3.检查确认服务正在运行

eg: srvctl config service -d rac

检查确认服务正在运行:

[oracle@jyrac1 ~]$ srvctl config service -d jyzhao
Service name: server_taf
Service is enabled
Server pool: jyzhao_server_taf
Cardinality: 2
disconnect: false
Service role: PRIMARY
Management policy: AUTOMATIC
DTP transaction: false
AQ HA notifications: false
Failover type: NONE
Failover method: NONE
TAF failover retries: 0
TAF failover delay: 0
Connection Load Balancing Goal: LONG
Runtime Load Balancing Goal: NONE
TAF policy specification: BASIC
Edition: 
Preferred instances: jyzhao1,jyzhao2
Available instances:

4.找到刚创建服务的service_id

eg: select name,service_id from dba_services where name = 'server_taf';

找到刚创建服务的service_id

sql> select name,service_id from dba_services where name = 'server_taf'; 

NAME                                                             SERVICE_ID
---------------------------------------------------------------- ----------
server_taf                                                                7

5.根据service_id审查服务的信息

col name format a15
col failover_method format a11 heading 'METHOD'
col failover_type format a10 heading 'TYPE'
col failover_retries format 9999999 heading 'RETRIES'
col goal format a10
col clb_goal format a8
col AQ_HA_NOTIFICATIONS format a5 heading 'AQNOT'

select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications
from dba_services where service_id = 7;

根据service_id审查服务的信息:

sql> col name format a15  
sql> col failover_method format a11 heading 'METHOD' 
sql> col failover_type format a10 heading 'TYPE' 
sql> col failover_retries format 9999999 heading 'RETRIES' 
sql> col goal format a10 
sql> col clb_goal format a8 
sql> col AQ_HA_NOTIFICATIONS format a5 heading 'AQNOT' 
sql> select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications  
  2  from dba_services where service_id = 7
  3  ;

NAME            METHOD      TYPE        RETRIES GOAL       CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf      NONE        NONE              0 NONE       LONG     NO

sql>

6.给服务添加server side failover参数

execute dbms_service.modify_service (service_name => 'server_taf' -
, aq_ha_notifications => true -
, failover_method => dbms_service.failover_method_basic -
, failover_type => dbms_service.failover_type_select -
, failover_retries => 180 -
, failover_delay => 5 -
, clb_goal => dbms_service.clb_goal_long);

11.2版本可以使用srvctl 修改服务的信息：
srvctl modify service -d RAC -s server_taf -m BASIC -e SELECT -q TRUE -j LONG

给服务添加server side failover参数:

sql> execute dbms_service.modify_service (service_name => 'server_taf' - 
> , aq_ha_notifications => true - 
> , failover_method => dbms_service.failover_method_basic - 
> , failover_type => dbms_service.failover_type_select - 
> , failover_retries => 180 - 
> , failover_delay => 5 - 
> , clb_goal => dbms_service.clb_goal_long); 

PL/sql procedure successfully completed.

7.再次审查服务可以看到Method, Type和Retries值

select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications
from dba_services where service_id = 7;

再次审查服务可以看到Method, Type和Retries值:

sql> select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications  
  2  from dba_services where service_id = 7;

NAME            METHOD      TYPE        RETRIES GOAL       CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf      BASIC       SELECT          180 NONE       LONG     YES

8.检查已注册的服务的监听信息

lsnrctl services

Service "server_taf.za.oracle.com" has 2 instance(s).
Instance "rac1", status READY, has 2 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
Remote Server
(ADDRESS=(PROTOCOL=TCP)(HOST=dell01)(PORT=1521))
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Instance "rac2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
Remote Server
(ADDRESS=(PROTOCOL=TCP)(HOST=dell02)(PORT=1521))

我这里版本差异，显示有区别，分别在不同节点显示自己的实例：

--node1:
Service "server_taf" has 1 instance(s).
  Instance "jyzhao1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0 state:ready
         LOCAL SERVER
The command completed successfully

--node2:
Service "server_taf" has 1 instance(s).
  Instance "jyzhao2", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0 state:ready
         LOCAL SERVER
The command completed successfully

9.创建网络服务名

SERVERTAF =
(DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = dell01)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = dell02)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = server_taf.za.oracle.com)
)
)

服务端RAC所有节点配置tnsnames.ora,添加内容：

SERVERTAF =
  (DESCRIPTION =
    (LOAD_BALANCE = yes)
    (ADDRESS = (PROTOCOL = TCP)(HOST = jyrac1)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = jyrac2)(PORT = 1521))
    (CONNECT_DATA =
      (SERVICE_NAME = server_taf)
    )
  )

sqlplus system/oracle@192.168.56.160/server_taf

10.测试TAF功能

select host_name,instance_name from v$instance;

sql> select instance_name from V$instance;
INSTANCE_NAME
----------------
rac2

sql> shutdown abort;
ORACLE instance shut down.

select host_name,instance_name from v$instance;

10.1 模拟客户端使用scanVIP测试能否实现TAF
sqlplus system/oracle@192.168.56.160/server_taf

[grid@jyrac1 ~]$ sqlplus system/oracle@192.168.56.160/server_taf

sql*Plus: Release 11.2.0.4.0 Production on Fri Mar 10 02:59:53 2017

copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

sql> select host_name,instance_name from v$instance;

HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1

--这里强制关掉jyzhao1实例。

sql> /

HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac2
jyzhao2

10.1 结论：可以实现TAF功能，相当于客户端不再需要配置，直接通过SCAN VIP连接。

10.2 模拟客户端使用Public IP测试能否实现TAF
sqlplus system/oracle@192.168.56.150/server_taf

sql>  select host_name,instance_name from v$instance;

HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1

--这里强制关掉jyzhao1实例。
sql> /
 select host_name,instance_name from v$instance
*
ERROR at line 1:
ORA-12153: TNS:not connected
Process ID: 20116
Session ID: 24 Serial number: 7

如果客户端配置tnsnames.ora,将publicIP配置

TAF =
  (DESCRIPTION =
    (LOAD_BALANCE = yes)
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.150)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.152)(PORT = 1521))
    (CONNECT_DATA =
      (SERVICE_NAME = server_taf)
    )
  )

再次测试：

[oracle@jyrac2 admin]$ sqlplus system/oracle@taf

sql*Plus: Release 11.2.0.4.0 Production on Fri Mar 10 05:11:30 2017

copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

sql> select host_name,instance_name from v$instance;

HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac2
jyzhao2

--这里强制关掉jyzhao2实例。
sql> /

HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1

10.2 结论：直接连接Public IP无法实现TAF功能。但客户端配置Public IP列表，可以实现。

10.3 模拟客户端使用VIP测试能否实现TAF
sqlplus system/oracle@192.168.56.151/server_taf

[grid@jyrac1 ~]$ sqlplus system/oracle@192.168.56.151/server_taf

sql*Plus: Release 11.2.0.4.0 Production on Fri Mar 10 04:32:20 2017

copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

sql> select host_name,instance_name from v$instance;

HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1


sql> /
select host_name,instance_name from v$instance
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 32459
Session ID: 159 Serial number: 3

如果客户端配置tnsnames.ora，可以通过sqlplus system/oracle@tafvip连接。

TAFVIP =
  (DESCRIPTION =
    (LOAD_BALANCE = yes)
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.151)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.153)(PORT = 1521))
    (CONNECT_DATA =
      (SERVICE_NAME = server_taf)
    )
  )