Linux下用dnsmasq做dns cache server的配置方法
目前最新版是2.7.1，可去其FTP下载：http://www.thekelleys.org.uk/dnsmasq/
安装过程比较简单
yum-yinstalldnsmasq* wgethttp://www.keepalived.org/software/keepalived-1.2.9.tar.gz tarzxvfkeepalived-1.2.9.tar.gz cdkeepalived-1.2.9 ./configure--prefix=/usr/local/keepalived make&&makeinstall mkdir/etc/keepalived cp/usr/local/keepalived/etc/keepalived/keepalived.conf/etc/keepalived/ ln-s/usr/local/keepalived/etc/sysconfig/keepalived/etc/sysconfig/ ln-s/usr/local/keepalived/etc/rc.d/init.d/keepalived/etc/init.d/ ln-s/usr/local/keepalived/sbin/keepalived/usr/sbin/ chkconfig--addkeepalived chkconfig--level35keepalivedon
keepalived的配置很简单，只需要配置一个VIP可以在两台Server之间飘来飘去就可以实现主备了
!ConfigurationFileforkeepalived
global_defs{
notification_email{
xxx@xxx.com
}
notification_email_fromxxx@xxx.com
smtp_server127.0.0.1
smtp_connect_timeout30
router_idLVS_DEVEL
}
vrrp_instancednscache{
stateMASTER//另一台配置BACKUP
interfaceeth1//在哪个接口上进行服务器状态检测
virtual_router_id51
priority180//BACKUP机器上配置100
advert_int1//检查间隔，单位为秒
authentication{
auth_typePASS
auth_pass1234
}
virtual_ipaddress{//VIP设置，指定到内网网卡
192.168.100.99/24deveth1
}
}
dnsmasq的配置也很简单
resolv-file=/etc/resolv.dnsmasq.conf cache-size=1000 conf-dir=/etc/dnsmasq.d
将dns地址写入到/etc/resolv.dnsmasq.conf文件中
echo"nameserver8.8.8.8">/etc/resolv.dnsmasq.conf
本机和局域网其它全部的服务器dns解析都用它
echo"nameserver192.168.100.99">/etc/resolv.conf
最后找一台局域网Server验证一下，如果能解析就说明正常了.
nslookupwww.google.cn192.168.100.99
此方案只适合小型企业，规模少的情况下使用，解析量大的时候还是用bind最好。
下面是其它网友的补充：
sudopacman-S--neededdnsmasq cd/etc
[admin@huangyeetc]$sudocp-vdnsmasq.conf{,.orig} `dnsmasq.conf'->`dnsmasq.conf.orig'
[admin@huangyeetc]$sudovimdnsmasq.conf