1. yum -y install kernel-devel make gcc openssl-devel libnl* popt* popt-static
2. wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
3. tar zxvf keepalived-1.2.7.tar.gz
4. cd keepalived-1.2.7
5. ./configure
6. 执行完最后一条时，终端应该显示为下图这样，如果不是请不要继续，自己返回来看下有没有哪里执行有误；
1.2.7,gcc,-g -o2,yes,yes,yes,yes,yes,no,no
7. make &make install
注册成系统服务
1. cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
2. cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
3. mkdir /etc/keepalived
4. cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
5. cp /usr/local/sbin/keepalived /usr/sbin/
至此，可以使用 service keepalived stop start status 等启动停止查看
设置开机启动 chkconfig keepalived on
配置keepalived
vi /etc/keepalived/keepalived.conf
主节点：
1. global_defs {
2. router_id NodeB
3. }
4. vrrp_instance VI_1 {
5. state MASTER #设置为主服务器
6. interface eth0 #监测网络接口
7. virtual_router_id 51 #主、备必须一样
8. priority 90 #(主、备机取不同的优先级，主机值较大，备份机值较小,值越大优先级越高)
9. advert_int 1 #VRRP Multicast广播周期秒数
10. authentication {
11. auth_type PASS #VRRP认证方式，主备必须一致
12. auth_pass 1111 #(密码)
13.}
14.virtual_ipaddress {
15. 192.168.8.100/24 #VRRP HA虚拟地址
16.}
备节点：
1. global_defs {
2. router_id NodeB
3. }
4. vrrp_instance VI_1 {
5. state BACKUP #设置为备服务器
6. interface eth0 #监测网络接口
7. virtual_router_id 51 #主、备必须一样
8. priority 90 #(主、备机取不同的优先级，主机值较大，备份机值较小,值越大优先级越高)
9. advert_int 1 #VRRP Multicast广播周期秒数
10. authentication {
11. auth_type PASS #VRRP认证方式，主备必须一致
12. auth_pass 1111 #(密码)
13.}
14.virtual_ipaddress {
15. 192.168.8.100/24 #VRRP HA虚拟地址
16.}
至此可以实现VIP自动浮动，使用ip addr 验证
####以下配置在172.28.8.199上绑定DNS服务端口53
virtual_server172.28.8.199 53 {
delay_loop 2
lb_algo wrr
lb_kind DR
net_mask 255.255.255.255 #一定要加上这行，否则53端口在199 ip上监听不起来
persistence_timeout 3
protocol TCP
real_server 172.28.8.197 53 {
weight 3
TCP_CHECK {
connect_timeout 2
nb_get_retry 3
delay_before_retry 3
connect_port 53
}
}
real_server 172.28.8.198 53 {
weight 3
TCP_CHECK {
connect_timeout 2
nb_get_retry 3
delay_before_retry 3
connect_port 53
}
######udp 53
virtual_server172.28.8.199 53 {
delay_loop 2
lb_algo wrr
lb_kind DR
persistence_timeout 3
protocol UDP
real_server 172.28.8.197 53 {
weight 3
UDP_CHECK {
connect_timeout 2
nb_get_retry 3
delay_before_retry 3
connect_port 53
}
}
real_server 172.28.8.198 53 {
weight 3
UDP_CHECK {
connect_timeout 2
nb_get_retry 3
delay_before_retry 3
connect_port 53
}
Keepalive在一个节点启动或重启后，一定要重启下named服务，要不然53端口要过很长时间才能在浮动IP上启来
