在Oracle 11g的RAC中增加了SCAN IP,而使用 SCAN IP的一种方式就是使用DNS，这里介绍在RedHat Linux 5.4中DNS的详细配置操作。
在配置DNS之前修改主机名
Redhat Linux 5.4 DNS配置操作
在配置DNS之前修改主机名
[root@beiku1 etc]# hostname beiku1.linuxidc.com
[root@beiku1 etc]# vi /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 beiku1.linuxidc.com localhost
::1 localhost6.localdomain6 localhost6
10.138.130.161 beiku1
[root@beiku1 etc]# vi /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=beiku1.linuxidc.com
GATEWAY=10.138.130.254
一.安装软件包
Redhat linux 5.4 下的dns服务所有的bind包如下：
bind-9.3.6-4.P1.el5
bind-libbind-devel-9.3.6-4.P1.el5
kdebindings-devel-3.5.4-6.el5
kdebindings-3.5.4-6.el5
bind-devel-9.3.6-4.P1.el5
bind-utils-9.3.6-4.P1.el5
bind-chroot-9.3.6-4.P1.el5
ypbind-1.19-12.el5
system-config-bind-4.0.3-4.el5
bind-libs-9.3.6-4.P1.el5
bind-sdb-9.3.6-4.P1.el5
使用rpm –qa | grep bind来检查系统是否已经安装了以上软件包:
[root@beiku1 soft]# rpm -qa | grep bind
bind-chroot-9.3.6-4.P1.el5
kdebindings-3.5.4-6.el5
ypbind-1.19-12.el5
bind-libs-9.3.6-4.P1.el5
bind-9.3.6-4.P1.el5
system-config-bind-4.0.3-4.el5
bind-utils-9.3.6-4.P1.el5
对于没有安装的软件包执行以下命令进行安装
[root@beiku1 soft]# rpm -ivh bind-9.3.6-4.P1.el5.i386.rpm
warning: bind-9.3.6-4.P1.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
package bind-9.3.6-4.P1.el5.i386 is already installed
[root@beiku1 soft]# rpm -ivh caching-nameserver-9.3.6-4.P1.el5.i386.rpm
warning: caching-nameserver-9.3.6-4.P1.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:caching-nameserver ########################################### [100%]
[root@beiku1 soft]# rpm -ivh install kdebindings-devel-3.5.4-6.el5.i386.rpm
error: open of install failed: No such file or directory
warning: kdebindings-devel-3.5.4-6.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
[root@beiku1 soft]# rpm -ivh kdebindings-devel-3.5.4-6.el5.i386.rpm
warning: kdebindings-devel-3.5.4-6.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:kdebindings-devel ########################################### [100%]
[root@beiku1 soft]# rpm -ivh bind-sdb-9.3.6-4.P1.el5.i386.rpm
warning: bind-sdb-9.3.6-4.P1.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:bind-sdb ########################################### [100%]
[root@beiku1 soft]# rpm -ivh bind-libbind-devel-9.3.6-4.P1.el5.i386.rpm
warning: bind-libbind-devel-9.3.6-4.P1.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:bind-libbind-devel ########################################### [100%]
[root@beiku1 soft]# rpm -ivh bind-devel-9.3.6-4.P1.el5.i386.rpm
warning: bind-devel-9.3.6-4.P1.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:bind-devel ########################################### [100%]
还要手动安装一个软件包caching-nameserver-9.3.6-4.P1.el5 ,不安装这个软件包named服务不能启动,会报错误信息 例如:
[root@beiku1 ~]# service named start
Locating /var/named/chroot//etc/named.conf failed:
[FAILED]
[root@beiku1 soft]# rpm -ivh caching-nameserver-9.3.6-4.P1.el5.i386.rpm
warning: caching-nameserver-9.3.6-4.P1.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:caching-nameserver ########################################### [100%]
[root@beiku1 soft]# service named start
Starting named: [ OK ]