Oracle 11gR2 RAC搭建（虚拟机搭建）

需要注意的是ORACLE_UNQNAME是数据库名（这里用orcl），创建数据库时指定多个节点是会创建多个实例，ORACLE_SID指的是数据库实例名
#su - oracle
$vi .bash_profile
export TMP=/tmp
export TMPDIR=$TMP
export ORACLE_SID=orcl1 # RAC1使用这个配置
export ORACLE_SID=orcl2 # RAC2使用这个配置
export ORACLE_UNQNAME=orcl
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1
export TNS_ADMIN=$ORACLE_HOME/network/admin
export PATH=/usr/sbin:$PATH
export PATH=$ORACLE_HOME/bin:$PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
$ source .bash_profile使配置文件生效（修改环境变量都是在最末行追加，保存后都要source使配置生效）

7.配置oracle、grid用户ssh互信

#su – oracle
$mkdir ~/.ssh
$chmod 755 .ssh 
$/usr/bin/ssh-keygen -t rsa
$/usr/bin/ssh-keygen -t dsa
下面步骤只在节点1执行，将所有的key文件汇总到一个总的认证文件中
$ssh rac1 cat ~/.ssh/id_rsa.pub >> authorized_keys
$ssh rac2 cat ~/.ssh/id_rsa.pub >> authorized_keys
$ssh rac1 cat ~/.ssh/id_dsa.pub >> authorized_keys
$ssh rac2 cat ~/.ssh/id_dsa.pub >> authorized_keys
$ cd ~/.ssh/
$ scp authorized_keys rac2:~/.ssh/  拷贝完整的key到节点2
[[email?protected] .ssh]chmod 600 authorized_keys  此处注意是登陆到节点2修改权限
下面步骤2个节点都要执行，否则后续安装会报错，相当重要，得到的结果应该是一个时间
$ssh rac1 date
$ssh rac2 date
$ssh rac1-priv date
$ssh rac2-priv date

grid的互信参照oracle用户处理即可

8.配置裸盘
(1)fdisk -l 通过该命令查看磁盘，可看到我们后面添加上去的磁盘信息，磁盘从sdb到sdf
(2)分区、格式化磁盘。由于是共享磁盘，所以只需要在一个节点上执行即可
在节点1上格式化，以/dev/sdb为例：
#fdisk /dev/sdb
The number of cylinders for this disk is set to 3824.
There is nothing wrong with that,but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g.,old versions of LILO)
2) booting and partitioning software from other OSs
(e.g.,DOS FDISK,OS/2 FDISK)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-3824,default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-3824,default 3824):
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
格式化完毕后得到如下分区
#ls /dev/sd*
/dev/sda /dev/sda2 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1 /dev/sda1 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf
(3)在节点上添加裸设备，注意2个节点都要执行

#vi /etc/udev/rules.d/99-oracle-asmdevices.rules
ACTION=="add",KERNEL=="sdb1",RUN+="/bin/raw /dev/raw/raw1 %N"
ACTION=="add",KERNEL=="sdc1",RUN+="/bin/raw /dev/raw/raw2 %N"
ACTION=="add",KERNEL=="sdd1",RUN+="/bin/raw /dev/raw/raw3 %N"
ACTION=="add",KERNEL=="sde1",RUN+="/bin/raw /dev/raw/raw4 %N"
ACTION=="add",KERNEL=="sdf1",RUN+="/bin/raw /dev/raw/raw5 %N"
KERNEL=="raw[1]",MODE="0660",OWNER="grid",GROUP="asmadmin"
KERNEL=="raw[2]",GROUP="asmadmin"
KERNEL=="raw[3]",GROUP="asmadmin"
KERNEL=="raw[4]",GROUP="asmadmin"
KERNEL=="raw[5]",GROUP="asmadmin"

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