keepalived+lvs 实现站点高可用

一 Server IP：
Real Server 1：192.168.16.62
Real Server 2：192.168.16.63
Virtual Server ：192.168.16.69
Keepalived Server 1:192.168.16.64
Keepalived Server 2:192.168.16.66

二 Real Server 配置

Real Server 1:192.168.16.62
 ifconfig lo:0 192.168.16.69 netmask 255.255.255.255 broadcast 192.168.16.69
 route add -host 192.168.16.69 dev lo:0
 echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
 echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
 echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
 echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
 安装 httpd
 Real Server 2 同上

三 Keepalived Server 1 配置  
安装 keepalived
keepalived.conf按如下配置
 global_defs {
   notification_email {
   suzb@clo.com.cn
 }
 notification_email_from keepalived@clo.com
 smtp_server 192.268.101.12
 smtp_connect_timeout 30
 router_id node04
 vrrp_mcast_group4 224.0.16.18 
}

vrrp_instance VI_1 {
state MASTER|BACKUP
interface ens32
virtual_router_id 60
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123
}
virtual_ipaddress {
192.168.16.69/24 dev ens32
}
notify_master “/etc/keepalived/keepalived-notify.sh master”
notify_backup “/etc/keepalived/keepalived-notify.sh backup”
notify_fault “/etc/keepalived/keepalived-notify.sh fault”

}

virtual_server 192.168.16.69 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP

real_server 192.168.16.62 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.16.63 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3

}
}
}

}

Keepalived Server  2 配置 同上

四，测试

#ip addr l              在 Virtual Server 查看 VIP 在那台Virtual Server 上

#ipvsadm -Ln       查看 ipvs 策略是否生成

#curl 192.168.16.69   发布的web站点