Oracle12cRAC修改SCAN配置

 看下12c中对SCAN 的修改，修改包括2个方面：

（1） 修改SCAN 的名称。

（2） 修改SCAN 的IP 地址。

 

如果使用的是/etc/hosts里的SCAN，那么只需要修改hosts文件就可以，如果使用DNS的，就需要从DNS 来修改，我这里使用DNS的RAC环境，所以修改DNS为例，进行示范。

 

另外，修改会停止SCAN，所以如果数据库是用SCAN 连链接的，就需要停部分操作，这部分可以转换到用VIP连链接，修改期间，数据库可以正常运行，其他操作不受影响。

 

1 当前环境

 

[grid@rac1 ~]$ crs_stat -t

Name Type Target State Host

------------------------------------------------------------

ora....SM.lsnr ora....er.type ONLINE ONLINE rac1

ora....ER.lsnr ora....er.type ONLINE ONLINE rac1

ora....N1.lsnr ora....er.type ONLINE ONLINE rac2

ora....N2.lsnr ora....er.type ONLINE ONLINE rac1

ora....N3.lsnr ora....er.type ONLINE ONLINE rac1

ora.MGMTLSNR ora....nr.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.mgmtdb ora....db.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.proxy_advm ora....vm.type ONLINE ONLINE rac1

ora....C1.lsnr application ONLINE ONLINE rac1

ora.rac1.ons application ONLINE ONLINE rac1

ora.rac1.vip ora....t1.type ONLINE ONLINE rac1

ora....C2.lsnr application ONLINE ONLINE rac2

ora.rac2.ons application ONLINE ONLINE rac2

ora.rac2.vip ora....t1.type ONLINE ONLINE rac2

ora.scan1.vip ora....ip.type ONLINE ONLINE rac2

ora.scan2.vip ora....ip.type ONLINE ONLINE rac1

ora.scan3.vip ora....ip.type ONLINE ONLINE rac1

 

[grid@rac1 ~]$ srvctl config scan

SCAN name: scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 0 IPv4 VIP: 192.168.56.21

SCAN name: scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 1 IPv4 VIP: 192.168.56.22

SCAN name: scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 2 IPv4 VIP: 192.168.56.20

[grid@rac1 ~]$

 

这里是2个节点的RAC 集群。

 

SCAN 名称是：scan.cndba.cn

3个SCAN IP：

192.168.56.20

192.168.56.21

192.168.56.22

 

 

2 修改SCAN

 

2.1 停止SCAN

 

[grid@rac1 ~]$ srvctl stop scan_listener

[grid@rac1 ~]$ srvctl stop scan

[grid@rac1 ~]$ srvctl status scan

SCAN VIP scan1 is enabled

SCAN VIP scan1 is not running

SCAN VIP scan2 is enabled

SCAN VIP scan2 is not running

SCAN VIP scan3 is enabled

SCAN VIP scan3 is not running

 

2.2 修改SCAN 信息

 

这里我们修改SCAN 名称和IP 地址。

 

这里将SCAN 名称从SCAN 修改成cndba-scan.

 

IP 地址修改成：

192.168.56.30

192.168.56.31

192.168.56.32

 

关于SCAN的修改，参考如下链接：

Oracle 12c RAC 集群使用DNS 实现 SCAN

http://blog.csdn.net/tianlesoftware/article/details/42917867

 

修改之后，如下：

 

[grid@rac1 grid]$ nslookupcndba-scan.cndba.cn

Server: 192.168.56.200

Address: 192.168.56.200#53

 

Name: cndba-scan.cndba.cn

Address: 192.168.56.30

Name: cndba-scan.cndba.cn

Address: 192.168.56.31

Name: cndba-scan.cndba.cn

Address: 192.168.56.32

 

[grid@rac2 ~]$ nslookup cndba-scan.cndba.cn

Server: 192.168.56.200

Address: 192.168.56.200#53

 

Name: cndba-scan.cndba.cn

Address: 192.168.56.31

Name: cndba-scan.cndba.cn

Address: 192.168.56.32

Name: cndba-scan.cndba.cn

Address: 192.168.56.30

 

2.3 执行修改操作

 

用root用户执行如下操作。

 

[grid@rac1 ~]$ which srvctl

/u01/gridsoft/12.1.0/bin/srvctl

 

[grid@rac1 ~]$ which crsctl

/u01/gridsoft/12.1.0/bin/crsctl

 

[root@rac1 /]# /u01/gridsoft/12.1.0/bin/srvctlmodify scan -n cndba-scan.cndba.cn

 

[grid@rac1 ~]$ srvctl config scan

SCAN name: cndba-scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 0 IPv4 VIP: 192.168.56.30

SCAN name: cndba-scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 1 IPv4 VIP: 192.168.56.31

SCAN name: cndba-scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 2 IPv4 VIP: 192.168.56.32

[grid@rac1 ~]$

 

 

看上去，一切都ok了，实际上，并没有，我们还SCAN_VIP的属性：

 

[grid@rac1 ~]$ crs_stat -t

Name Type Target State Host

------------------------------------------------------------

…

ora.scan1.vip ora....ip.type OFFLINE OFFLINE

ora.scan2.vip ora....ip.type OFFLINE OFFLINE

ora.scan3.vip ora....ip.type OFFLINE OFFLINE

 

[grid@rac1 ~]$ crsctl stat res ora.scan3.vip-p

NAME=ora.scan3.vip

TYPE=ora.scan_vip.type

ACL=owner:root:rwx,pgrp:root:r-x,other::r--,group:oinstall:r-x,user:grid:r-x

ACTIONS=

…

RESTART_ATTEMPTS=0

SCAN_NAME=scan.cndba.cn

SCRIPT_TIMEOUT=60

SERVER_CATEGORY=ora.hub.category

…

USR_ORA_VIP=192.168.56.20

VERSION=12.1.0.1.0

 

[grid@rac1 ~]$

 

[grid@rac1 ~]$ crsctl stat resora.scan3.vip

NAME=ora.scan3.vip

TYPE=ora.scan_vip.type

TARGET=OFFLINE

STATE=OFFLINE

 

所以我们，我们要修改type里的信息。

 

用root用户执行：

[root@rac1 /]#/u01/gridsoft/12.1.0/bin/crsctl modify type ora.scan_vip.type -attr"ATTRIBUTE=SCAN_NAME,DEFAULT_VALUE=cndba-scan.cndba.cn"

[root@rac1 /]#

 

这次就全变了：

[grid@rac1 ~]$ crsctl stat res ora.scan3.vip -p

NAME=ora.scan3.vip

TYPE=ora.scan_vip.type

…

SCAN_NAME=cndba-scan.cndba.cn

…

USR_ORA_VIP=192.168.56.32

VERSION=12.1.0.1.0

 

至此，修改完成。

 

 

 

2.4 启动SCAN

 

用grid用户操作：

 

[grid@rac1 ~]$ srvctl start scan

[grid@rac1 ~]$ srvctl start scan_listener

 

 

 

2.5 验证

 

[grid@rac2 ~]$ srvctl config scan

SCAN name: cndba-scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 0 IPv4 VIP: 192.168.56.30

SCAN name: cndba-scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 1 IPv4 VIP: 192.168.56.31

SCAN name: cndba-scan.cndba.cn, Network: 1

Subnet IPv4:192.168.56.0/255.255.255.0/eth0

Subnet IPv6:

SCAN 2 IPv4 VIP: 192.168.56.32

[grid@rac2 ~]$

 

 

[grid@rac2 ~]$ crsctl stat res -t

--------------------------------------------------------------------------------

Name Target State Server Statedetails

--------------------------------------------------------------------------------

Local Resources

--------------------------------------------------------------------------------

ora.ASMNET1LSNR_ASM.lsnr

ONLINE ONLINE rac1 STABLE

ONLINE ONLINE rac2 STABLE

ora.LISTENER.lsnr

ONLINE ONLINE rac1 STABLE

ONLINE ONLINE rac2 STABLE

ora.OCR.dg

ONLINE ONLINE rac1 STABLE

ONLINE ONLINE rac2 STABLE

ora.net1.network

ONLINE ONLINE rac1 STABLE

ONLINE ONLINE rac2 STABLE

ora.ons

ONLINE ONLINE rac1 STABLE

ONLINE ONLINE rac2 STABLE

ora.proxy_advm

ONLINE ONLINE rac1 STABLE

ONLINE ONLINE rac2 STABLE

--------------------------------------------------------------------------------

Cluster Resources

--------------------------------------------------------------------------------

ora.LISTENER_SCAN1.lsnr

1 ONLINE ONLINE rac2 STABLE

ora.LISTENER_SCAN2.lsnr

1 ONLINE ONLINE rac1 STABLE

ora.LISTENER_SCAN3.lsnr

1 ONLINE ONLINE rac1 STABLE

ora.MGMTLSNR

1 ONLINE ONLINE rac1 169.254.95.238 192.1

68.57.5,STABLE

ora.asm

1 ONLINE ONLINE rac1 STABLE

2 ONLINE ONLINE rac2 STABLE

3 OFFLINE OFFLINE STABLE

ora.cvu

1 ONLINE ONLINE rac1 STABLE

ora.mgmtdb

1 ONLINE ONLINE rac1 Open,STABLE

ora.oc4j

1 ONLINE ONLINE rac1 STABLE

ora.rac1.vip

1 ONLINE ONLINE rac1 STABLE

ora.rac2.vip

1 ONLINE ONLINE rac2 STABLE

ora.scan1.vip

1 ONLINE ONLINE rac2 STABLE

ora.scan2.vip

1 ONLINE ONLINE rac1 STABLE

ora.scan3.vip

1 ONLINE ONLINE rac1 STABLE

--------------------------------------------------------------------------------