2013年（350）
分类： Oracle
2013-04-25 11:04:51
1、设置ssh
在clusterware (CRS) 和 Rac Database安装过程中，Oracle Universal Installer (OUI) 必须能够以 oracle 的身份自动将软件复制到所有 RAC 节点。这里我们通过配置ssh 让用户拥有不输入密码即可访问各节点的能力。
首先两个节点间互ping，要确保都是通的
[root@node1 ~]# ping 192.168.100.102
[root@node1 ~]# ping 10.10.17.222
要建立用户等效性，需要在两个节点上以 oracle 用户身份生成用户的公钥和私钥，首先在node1执行：
[root@node1 opt]# su - oracle
[oracle@node1 ~]$ mkdir ~/.ssh
[oracle@node1 ~]$ chmod 700 ~/.ssh
[oracle@node1 ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_rsa.
Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.
The key fingerprint is:
d2:69:eb:ac:86:62:27:50:99:ff:e8:1e:a2:e6:5d:7f oracle@node1
[oracle@node1 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_dsa.
Your public key has been saved in /home/oracle/.ssh/id_dsa.pub.
The key fingerprint is:
0a:9a:20:46:a2:28:ec:72:23:82:f2:9d:f8:62:9b:d1 oracle@node1
然后换node2执行
[root@node2 ~]# ping 192.168.100.102
[root@node2 ~]# ping 10.10.17.222
[root@node2 opt]# su - oracle
[oracle@node2 ~]$ mkdir ~/.ssh
[oracle@node2 ~]$ chmod 700 ~/.ssh
[oracle@node2 ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_rsa.
Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.
The key fingerprint is:
dd:be:7a:37:e4:b5:f0:b2:24:95:50:61:ea:a1:61:07 oracle@node2
[oracle@node2 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_dsa.
Your public key has been saved in /home/oracle/.ssh/id_dsa.pub.
The key fingerprint is:
bc:b5:cb:43:c7:19:53:d6:f7:16:69:85:12:7f:aa:be oracle@node2
切换回node1，接着执行：
[oracle@node1 ~]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
[oracle@node1 ~]$ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
提示：下列命令会提示你输入node2的oracle密码，按照提示输入即可，如果失败可重新尝试执行命令。
[oracle@node1 ~]$ ssh node2 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
The authenticity of host 'node2 (192.168.100.102)' can't be established.
RSA key fingerprint is 92:d1:ce:5b:c8:a1:52:d5:ac:00:5f:48:5d:12:06:e4.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'node2,192.168.100.102' (RSA) to the list of known hosts.
oracle@node2's password:
[oracle@node1 ~]$ ssh node2 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
oracle@node2's password:
[oracle@node1 ~]$ scp ~/.ssh/authorized_keys node2:~/.ssh/authorized_keys
oracle@node2's password:
authorized_keys 100% 1992 2.0KB/s 00:00
两机相互执行，看看是否还需要输入密码
[oracle@node1 ~]$ ssh node1 date
[oracle@node1 ~]$ ssh node2 date
[oracle@node1 ~]$ ssh node1-priv date
[oracle@node1 ~]$ ssh node2-priv date
切换至node2执行
[oracle@node2 ~]$ ssh node1 date
[oracle@node2 ~]$ ssh node2 date
[oracle@node2 ~]$ ssh node1-priv date
[oracle@node2 ~]$ ssh node2-priv date
提示：
注意命令的返回信息，由于rac对节点间时间较敏感，因此如果此处显示节点单时间不一至，建议同步(一般相隔超过20秒就需要同步时间了)。
2、配置asm
注意：必须以root身份进行
首先在node1执行：
[root@node1 ~]# /etc/init.d/oracleasm configure
Configuring the Oracle ASM library driver.
This will configure the on-boot properties of the Oracle ASM library
driver. The following questions will determine whether the driver is
loaded on boot and what permissions it will have. The current values
will be shown in brackets ('[]'). Hitting
answer will keep that current value. Ctrl-C will abort.
Default user to own the driver interface []: oracle
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Fix permissions of Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: [ OK ]
Loading module "oracleasm": [ OK ]
Mounting ASMlib driver filesystem: [ OK ]
Scanning system for ASM disks: [ OK ]
提示：如果本步执行出错(可能出错机率最高的是在Scanning system for ASM)，不妨将转换一下命令行的执行方式，改成:
[root@node1 ~]# sh /etc/init.d/oracleasm configure
有可能解决你的问题！
然后切换至node2执行
[root@node2 ~]# /etc/init.d/oracleasm configure
Configuring the Oracle ASM library driver.
This will configure the on-boot properties of the Oracle ASM library
driver. The following questions will determine whether the driver is
loaded on boot and what permissions it will have. The current values
will be shown in brackets ('[]'). Hitting
answer will keep that current value. Ctrl-C will abort.
Default user to own the driver interface []: oracle
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Fix permissions of Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: [ OK ]
Loading module "oracleasm": [ OK ]
Mounting ASMlib driver filesystem: [ OK ]
Scanning system for ASM disks: [ OK ]
再切换回node1执行
[root@node1 ~]# /etc/init.d/oracleasm createdisk VOL1 /dev/sdd1
Marking disk "/dev/sdd1" as an ASM disk: [ OK ]
[root@node1 ~]# /etc/init.d/oracleasm createdisk VOL2 /dev/sde1
Marking disk "/dev/sde1" as an ASM disk: [ OK ]
[root@node1 linux-patch]# /etc/init.d/oracleasm scandisks
Scanning system for ASM disks: [ OK ]
查看一下当前的磁盘组：
Scanning system for ASM disks: [ OK ]
[root@node1 ~]# /etc/init.d/oracleasm listdisks
VOL1
VOL2
Node2上也查看一下当前磁盘组：
[root@node2 ~]# /etc/init.d/oracleasm scandisks
Scanning system for ASM disks: [ OK ]
[root@node2 ~]# /etc/init.d/oracleasm listdisks
VOL1
VOL2
Ok,配置完成，准备进入到crs的安装阶段
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