HAProxy+Keepalived实现双主高可用负载均衡
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OS:CentOS7
HAProxy+Keepalived-1:192.168.10.128
HAProxy+Keepalived-2:192.168.10.129
VIP1:192.168.10.111
VIP2:192.168.10.222
WEB1:192.168.10.130:80
WEB2:192.168.10.131:80
二、配置Keepalived(注:安装及配置解释详见本博其他文章)
①配置keepalived主配置文件(配置文件大部相同)
配置192.168.10.128做192.168.10.111的MASTER,192.168.10.222的BACKUP;
配置192.168.10.128做192.168.10.111的BACKUP,192.168.10.222的MASTER.
a.192.168.10.128配置如下:
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# vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
zhi@163.com ##设置邮件报警地址
}
notification_email_from zhi@zhi.com
smtp_server 127.0.0.1
smtp_connect_timeout 3
router_id LVS_DEVEL
}
vrrp_script check_haproxy { ##添加haproxy服务监控脚本
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 { ##配置vrrp实例1
state MASTER
interface eno16777736
virtual_router_id 51 ##实例1虚拟路由标识
priority 101
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script { ##检测执行脚本
check_haproxy
}
virtual_ipaddress {
192.168.10.111
}
}
vrrp_instance VI_2 { ##配置vrrp实例2
state BACKUP
interface eno16777736
virtual_router_id 52 ##实例2虚拟路由标识
priority 100
advert_int 1
garp_master_delay 5
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.10.222
}
b.192.168.10.129配置如下:
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# vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
zhi@163.com ##设置邮件报警地址
}
notification_email_from zhi@zhi.com
smtp_server 127.0.0.1
smtp_connect_timeout 3
router_id LVS_DEVEL
}
vrrp_script check_haproxy { ##添加haproxy服务监控脚本
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 { ##配置vrrp实例1
state BACKUP
interface eno16777736
virtual_router_id 51 ##实例1虚拟路由标识
priority 100
advert_int 1
garp_master_delay 5
authentication {
auth_type PASS
auth_pass 1111
}
track_script { ##检测执行脚本
check_haproxy
}
virtual_ipaddress {
192.168.10.111
}
}
vrrp_instance VI_2 { ##配置vrrp实例2
state MASTER
interface eno16777736
virtual_router_id 52 ##实例2虚拟路由标识
priority 101
advert_int 1
garp_master_delay 5
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.10.222
}
②配置HAProxy检测脚本
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# vi /etc/keepalived/check_haproxy.sh
#!/bin/bash
if [ $(ps -C haproxy --no-header |wc -l) -eq 0 ]
then
systemctl start haproxy
fi
sleep 2
if [ $(ps -C haproxy --no-header |wc -l) -eq 0 ]
then
systemctl stop keepalived
fi
# chmod u+x /etc/keepalived/check_haproxy.sh
③开启keepalived并查看
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# systemctl start keepalived
192.168.10.128:
192.168.10.129:
三、配置HAProxy(注:安装及配置解释详见本博其他文章)
①配置HAProxy主配置文件(配置文件相同)
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# vi /etc/haproxy/haproxy.cfg
# this config needs haproxy-1.1.28 or haproxy-1.2.1
global ##全局配置
log 127.0.0.1 local0
log 127.0.0.1 local1 notice
#log loghost local0 info
maxconn 4096
chroot /usr/share/haproxy
uid 99
gid 99
daemon
#debug
#quiet
defaults ##默认配置
log global
mode http
optionhttplog
optiondontlognull
retries 3
option redispatch
maxconn 4000
timeout connect 5000
timeout client50000
timeout server50000
frontend web ##前端代理
bind 0.0.0.0:80
acl www.zhi.com hdr(host) -i
use_backend www.zhi.com if www.zhi.com
acl www.fly.com hdr(host) -i www.fly.com
use_backend www.fly.com if
backend ##后端www.zhi.com作用域
mode http
balance source ##保存session值
optionhttpchk /index.html
server192.168.10.130 192.168.10.130:80 check inter 2000 rise 2 fall 1
backend ##后端www.fly.com作用域
mode http
balance source ##保存session值
optionhttpchk /index.html
server192.168.10.131 192.168.10.131:80 check inter 2000 rise 2 fall 1
listen status ##监控页面设置
mode http
bind 0.0.0.0:80
stats enable
stats hide-version
stats uri /haproxyadmin
stats auth admin:admin
stats admin if TRUE
②开启HAProxy并查看
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# systemctl start haproxy
①浏览器输入192.168.10.128/haproxyadmin，输入账号密码查看
②浏览器输入192.168.10.129/haproxyadmin，输入账号密码查看
③浏览器输入192.168.10.111/haproxyadmin，输入账号密码查看
④浏览器输入192.168.10.222/haproxyadmin，输入账号密码查看
四、测试
①更改Windows的hosts文件
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C:\Windows\System32\drivers\etc\hosts
192.168.10.111 www.zhi.com
192.168.10.111 www.zhi.com
192.168.10.222 www.fly.com
192.168.10.222 www.fly.com
②测试1
ping www.zhi.com
ping www.fly.com
③测试2
192.168.10.128:
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# systemctl stop keepalived
# ip addr
192.168.10.129:
# ip addr
虚拟IP192.168.10.111已漂移至192.168.10.129，继续ping，依然通
OK了
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