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HomeDatabaseMysql TutorialOracle 添加RAC数据库集群节点

本系列文章详细记录了在已有两个rac节点的基础上,添加rac第3个节点的过程,期间对rac的使用没有任何影响,rac节点的操作系统均为

 1:配置新节点操作系统环境同其他节点一致,包括共享存储,补丁包,内核参数,,用户环境变量等等
[root@rac3 ~]# cat /etc/hosts
127.0.0.1              localhost.localdomain localhost
192.168.1.41            rac1.yang.com      rac1
192.168.122.41          rac1-priv.yang.com rac1-priv
192.168.1.141          rac1-vip.yang.com  rac1-vip

192.168.1.42            rac2.yang.com      rac2
192.168.122.42          rac2-priv.yang.com rac2-priv
192.168.1.142          rac2-vip.yang.com  rac2-vip

192.168.1.43            rac3.yang.com      rac3
192.168.122.43          rac3-priv.yang.com rac3-priv
192.168.1.143          rac3-vip.yang.com  rac3-vip

[root@rac3 ~]# getenforce
Disabled
[root@rac3 ~]# groupadd  oinstall
[root@rac3 ~]# groupadd dba
[root@rac3 ~]# useradd -g oinstall -G dba Oracle
[root@rac3 ~]# echo 'oracle' |passwd --stdin oracle
Changing password for user oracle.
passwd: all authentication tokens updated successfully.

[root@rac3 ~]# tail /etc/sysctl.conf
kernel.shmall = 2097152 
kernel.shmmax = 2147483648   
kernel.shmmni = 4096   
kernel.sem = 250 32000 100 128   
fs.file-max = 65536   
net.ipv4.ip_local_port_range = 1024 65000   
net.core.rmem_default = 262144   
net.core.rmem_max = 262144   
net.core.wmem_default = 262144   
net.core.wmem_max = 262144   
[root@rac3 ~]# sysctl -p

[root@rac3 ~]# tail -4  /etc/security/limits.conf
oracle soft nproc 2047 
oracle hard nproc 16384 
oracle soft nofile 1024 
oracle hard nofile 65536

[root@rac3 ~]# tail -1 /etc/pam.d/login
session    required    pam_limits.so
 
[root@rac3 ~]# tail -1 /etc/modprobe.conf
options hangcheck-timer hangcheck_tick=30 hangcheck_margin=180

[root@rac3 ~]# modprobe -v hangcheck-timer 
insmod /lib/modules/2.6.9-89.EL/kernel/drivers/char/hangcheck-timer.ko hangcheck_tick=30 hangcheck_margin=180


2:在新节点上配置共享存储,创建相关目录,设置用户环境变量
[root@rac3 ~]# chown -R oracle.oinstall /u01/
[root@rac3 ~]# su - oracle
[oracle@rac3 ~]$ cat .bash_profile
# .bash_profile 
# Get the aliases and functions 
if [ -f ~/.bashrc ]; then 
        . ~/.bashrc 
fi 
 
PATH=/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin:/root/bin 
export EDITOR=vim
export ORACLE_SID=racdb3
export ORACLE_BASE=/u01/app/oracle 
export ORACLE_HOME=$ORACLE_BASE/product/10.2.0/db_1 
export ORA_CRS_HOME=$ORACLE_BASE/product/10.2.0/crs_1 
export LD_LIBRARY_PATH=/lib 
alias sqlplus='/usr/local/rlwrap/bin/rlwrap sqlplus'
alias rman='/usr/local/rlwrap/bin/rlwrap rman'
export NLS_DATE_FORMAT='YYYY-MM-DD HH24:MI:SS'
export NLS_LANG=american_america.UTF8 
export PATH=$ORACLE_HOME/bin:$ORA_CRS_HOME/bin:$PATH
umask 022 
[oracle@rac3 ~]$ mkdir -p  $ORACLE_BASE/admin
[oracle@rac3 ~]$ mkdir -p  $ORACLE_HOME
[oracle@rac3 ~]$ mkdir -p  $ORA_CRS_HOME 

 3:配置各个节点的ssh对等性
[oracle@rac3 ~]$ ssh-keygen  -t dsa
[oracle@rac3 ~]$ ssh-keygen  -t rsa
使用ssh-copy-id命令将rac3节点的公钥导入到rac1,rac2上的/home/oracle/.ssh/authorized_keys文件中,步骤不在赘述;
最终需要实现在3个节点上使用oracle用户进行相互ssh登陆不需要输入密码

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