keepalive实现简单的高可用案例
1.系统环境说明
OS: centos 6.2
Server A:
内网:192.168.1.101 [em2]
外网:219.234.89.101 [em1]
Server B:
内网: 192.168.1.102 [em2]
外网:219.234.87.102 [em1]
VIP: 公网:219.234.87.100
应用场景: 搭建一个简单的服务器高可用,目的是为了能实现一台服务器宕机,另一台服务器立即响应对外提供服务(要求两台服务器上部署相同的服务并且服务都已开启);
2.keepalived下载与安装
[root@test2 tools]# wgethttp://www.keepalived.org/software/keepalived-1.2.7.tar.gz
[root@test2 tools]#yum -y install openssl opensll-devel poptpopt-devel libnl libnl-devel kernel-devel
[root@test2 tools]# tar -zxvf keepalived-1.2.7.tar.gz
[root@test2 tools]#cd keepalived-1.2.7
[root@test2 keepalived-1.2.7]# mkdir /usr/local/keepalived
[root@test2 keepalived-1.2.7]# ./configure--prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-358.6.2.el6.x86_64
[[email protected]]# make;make install
3.keepalived配置
[root@test2 keepalived-1.2.7]# cd /usr/local/app/keepalived/etc
[root@test2 etc]# vim keepalived.conf
3.1Server A keepalived.conf:
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.1.101
smtp_connect_timeout 30
router_idLVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface em1
virtual_router_id 51
mcast_src_ip 219.234.87.102
priority 100
advert_int 1
authentication{
auth_typePASS
auth_pass gy2012
}
virtual_ipaddress{
219.234.87.100
}
}
3.2 Server B keepalived.conf:
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.1.102
smtp_connect_timeout 30
router_idLVS_DEVEL
}
#vrrp: 虚拟路由器冗余协议是一种选择协议，它可以把一个虚拟路由器的责任动态分配到局域网上的 VRRP 路由器中的一台(http://baike.baidu.com/view/876125.htm?fromId=51194)
vrrp_instanceVI_1 {
state MASTER
interface em1
virtual_router_id 51
mcast_src_ip 219.234.87.101
priority 100
advert_int 1
authentication{
auth_typePASS
auth_pass gy2012
}
virtual_ipaddress {
219.234.87.100
}
}
4.启动和关闭
4.1 启动
[root@test2 etc]#/usr/local/app/keepalived/sbin/keepalived-f /usr/local/app/keepalived/etc/keepalived.conf �CD
4.2 关闭
[root@test2 etc]# pkill keepalived
5. 测试，出现如下信息表示成功：
C:\Users\Administrator>ping xxxx.com
正在 Ping taoying.com [219.234.87.100] 具有 32 字节的数据:
来自 219.234.87.100 的回复: 字节=32 时间=6ms TTL=47
来自 219.234.87.100 的回复: 字节=32 时间=5ms TTL=48
来自 219.234.87.100 的回复: 字节=32 时间=7ms TTL=47
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