利用Oracle CRS搭建应用的高可用集群

[收藏此页] [打印]作者：IT168 梁涛  2008-01-31内容导航：第3页 第1页：前言：CRS的简介和由来第2页：一、准备工作：软件安装，数据库创建第3页：第3页 第4页：三、Oracle 集群软件的资源的管理第5页：总结
二、Oracle 集群软件资源的手工注册

1. 注销crs本身自带的ons、gsd、vip资源

root@rac01 # crs_stop -all
Attempting to stop `ora.rac01.gsd` on member `rac01`
Attempting to stop `ora.rac01.ons` on member `rac01`
Attempting to stop `ora.rac02.gsd` on member `rac02`
Attempting to stop `ora.rac02.ons` on member `rac02`
Stop of `ora.rac02.gsd` on member `rac02` succeeded.
Stop of `ora.rac02.ons` on member `rac02` succeeded.
Stop of `ora.rac01.gsd` on member `rac01` succeeded.
Stop of `ora.rac01.ons` on member `rac01` succeeded.
Attempting to stop `ora.rac01.vip` on member `rac01`
Attempting to stop `ora.rac02.vip` on member `rac02`
Stop of `ora.rac02.vip` on member `rac02` succeeded.
Stop of `ora.rac01.vip` on member `rac01` succeeded.

root@rac01 # crs_unregister ora.rac01.gsd
root@rac01 # crs_unregister ora.rac01.ons
root@rac01 # crs_unregister ora.rac01.vip
root@rac01 # crs_unregister ora.rac02.vip
root@rac01 # crs_unregister ora.rac02.ons
root@rac01 # crs_unregister ora.rac02.gsd
root@rac01 # crs_stat -t
CRS-0202: No resources are registered.

2.创建虚拟IP资源：

root@rac01 # crs_profile -create havip -t application -a /oracle/crs/bin/usrvip \
-o oi=e1000g0,ov=10.198.94.139,on=255.255.248.0
root@rac01 # crs_register havip
root@rac01 # crs_setperm havip -o root
root@rac01 # crs_setperm havip -u user:oracle:r-x
root@rac01 # crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
ha_vip application 0/1 0/0 OFFLINE OFFLINE
root@rac01 # crs_start havip
root@rac01 # crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
havip application 0/1 0/0 ONLINE ONLINE rac01


3.准备控制其他资源启动、关闭、检查的脚本文件dg.sh/fs.sh/db.sh/lsnr.sh
这四个脚本文件内容参考“五-3/4/5/6”部分

对crs_profile命令中的选项和参数做简单说明：
(1) 选项-r定义了该资源所依赖的资源，在下面的例子中，资源oradata_mount启动时依赖于
disk_group先 启动，需要停止disk_group的时候必须先停止资源oradata_mount，
资源orcl_db的启动则同时依赖于oradata_mount/disk_group/havip/listener；
(2) 参数-o 包括：ci的意思是crs对资源状态的监测间隔(check interval)，单位为秒；
ra : crs重启资源的尝试次数，RESTART_ATTEMPTS，次数到达以后将重新分配；
fi : 资源状态出现错误以后，crs的尝试间隔，FAILURE_INTERVAL，单位是秒；
ft : 资源状态出现错误以后，crs的尝试次数，FAILURE_THRESHOLD；
这些参数可以使用默认值，分别是60秒/1/0秒/0。
(3) 参数-a 是指ACTION_SCRIPT，参数值为资源启动、关闭、监测的脚本，脚本固定的三个参数为
start/stop/check；

管理数据库监听的部分：

修改$ORACLE_HOME/network/admin/listener.ora文件，
将其中(HOST = rac01 )部分修改成(HOST = 10.198.94.139 ) （虚拟IP地址）

crs_profile -create listener -t application -a /oracle/crs/crs/public/lsnr.sh -r havip -o \
ci=180,ra=6,ft=2,fi=12
crs_register listener
crs_setperm listener -o root
crs_setperm listener -u user:oracle:r-x
crs_start listener

管理磁盘组和逻辑卷的部分：

crs_profile -create disk_group -t application -a /oracle/crs/crs/public/dg.sh -r havip -o \
ci=180,ra=6,ft=2,fi=12
crs_register disk_group
crs_setperm disk_group -o root
crs_setperm disk_group -u user:oracle:r-x

注：本身磁盘组的启动并不依赖于虚拟IP的启动，这里之所以设置两者的依赖关系，
是为了防止虚拟IP在一个节点启动，而磁盘组在另外一个节点启动，造成资源不一致的情况出现。

管理文件系统的部分：

crs_profile -create oradata_mount -t application -a /oracle/crs/crs/public/fs.sh -r disk_group -o \
ci=180,ra=6,ft=2,fi=12
crs_register oradata_mount
crs_setperm oradata_mount -o root
crs_setperm oradata_mount -u user:oracle:r-x

管理数据库实例的部分：

crs_profile -create orcl_db -t application -a /oracle/crs/crs/public/db.sh -r \
"oradata_mount listener" -o ci=180,ra=6,ft=2,fi=12
crs_register orcl_db
crs_setperm orcl_db -o root
crs_setperm orcl_db -u user:oracle:r-x
crs_start orcl_db

4.确保脚本具有执行属性，并把public 和profile的内容拷到第二个节点上。
# chmod +x /oracle/crs/crs/public/*
# rcp -r -p /oracle/crs/crs/public/* rac02:/oracle/crs/crs/public/

5.启动所有的资源
下面可以看到，在crs启动和关闭资源的过程中，其顺序是按照前面定义的资源依赖关系进行的：

root@rac01 # crs_stop -all
Attempting to stop `orcl_db` on member `rac01`
Stop of `orcl_db` on member `rac01` succeeded.
Attempting to stop `oradata_mount` on member `rac01`
Stop of `oradata_mount` on member `rac01` succeeded.
Attempting to stop `disk_group` on member `rac01`
Stop of `disk_group` on member `rac01` succeeded.
Attempting to stop `listener` on member `rac01`
Stop of `listener` on member `rac01` succeeded.
Attempting to stop `havip` on member `rac01`
Stop of `havip` on member `rac01` succeeded.

root@rac01 # crs_start -all
Attempting to start `havip` on member `rac01`
Start of `havip` on member `rac01` succeeded.
Attempting to start `listener` on member `rac01`
Start of `listener` on member `rac01` succeeded.
Attempting to start `disk_group` on member `rac01`
Start of `disk_group` on member `rac01` succeeded.
Attempting to start `oradata_mount` on member `rac01`
Start of `oradata_mount` on member `rac01` succeeded.
Attempting to start `orcl_db` on member `rac01`
Start of `orcl_db` on member `rac01` succeeded.

检查资源状态是否正常：

oracle@rac01 $ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
disk_group application ONLINE ONLINE rac01
havip application ONLINE ONLINE rac01
listener application ONLINE ONLINE rac01
oradata_mount application ONLINE ONLINE rac01
orcl_db application ONLINE ONLINE rac01