[HA]负载均衡：HAPROXY与KEEPALIVED强强联合

hao0089

　　第一步：更改系统控制配置文件，同意分配虚拟IP（VIP）
　　/etc/sysctl.conf
net.ipv4.ip_nonlocal_bind=1<pre style=&quot;word-wrap: normal; line-height: 18px;&quot;>sysctl -p


步骤二：安装HAPROXY和KEEPALIVED　　
　　apt-get update && apt-get install keepalived haproxy -y

步骤三：配置KEEPALIVED
　　etc/keepalived/keepalived.conf
global_defs {
router_id haproxy1
}
vrrp_script haproxy {
script &quot;killall -0 haproxy&quot;
interval 2
weight 2
}
vrrp_instance 50 {
virtual_router_id 50
advert_int 1
priority 101
state MASTER
interface eth0
virtual_ipaddress {
192.168.1.32 dev eth0
}
track_script {
haproxy
}
}步骤四：配置HAPROXY
　　/etc/haproxy/haproxy.cfg
global
chroot /var/lib/haproxy
user haproxy
group haproxy
daemon
log 192.168.1.30 local0
stats socket /var/lib/haproxy/stats
maxconn 4000
defaults
logglobal
modehttp
optionhttplog
optiondontlognull
contimeout 5000
clitimeout 50000
srvtimeout 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
listen stats 192.168.1.30:80
mode http
stats enable
stats uri /stats
stats realm HAProxy\ Statistics
stats auth admin:password步骤五：启动HAPROXY和KEEPALIVED服务
　　service keepalived restart
service haproxy restart

步骤六：检測虚拟IP
　　# ip -a | grep eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
inet 192.168.1.30/24 brd 192.168.1.255 scope global eth0
inet 192.168.1.32/32 scope global eth0








　　




         
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