Install Haproxy Keppalived on CentOS 6.5

yesn

　　

　　Haproxy/Keepalived Server1: 192.168.20.12
Haproxy/Keepalived Server2: 192.168.20.13
Haproxy/Keepalived VIP: 192.168.20.10

　　

　　disable selinux and iptables
service iptables stop
chkconfig iptables off; chkconfig ip6tables off

setenforce 0
vi /etc/selinux/config
SELINUX=disabled
　　

　　Haproxy/Keepalived Server1:
　　1. echo "net.ipv4.ip_nonlocal_bind = 1" >> /etc/sysctl.conf
sysctl -p

yum -y install keepalived haproxy

2. cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.bak
vi /etc/keepalived/keepalived.conf
global_defs {
      router_id centos65-2
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
       auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.20.10
    }
}
下面的都删除

1). Priority value will be higher on Master server
2). virtual_router_id should be same on both servers
3). By default single vrrp_instance support up to 20 virtual_ipaddress

3. service keepalived start; chkconfig keepalived on
ip addr show eth0
　　

　　4. vi /etc/haproxy/haproxy.cfg
注释原有的frontend和backend
listen stats 192.168.20.12:80
        mode http
        stats enable
        stats uri /stats
　　        stats realm HAProxy\ Statistics
        stats auth admin:password
　　
service haproxy start; chkconfig haproxy on
　　

　　Haproxy/Keepalived Server2:
　　1. echo "net.ipv4.ip_nonlocal_bind = 1" >> /etc/sysctl.conf
sysctl -p

yum -y install keepalived haproxy

2. cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.bak
vi /etc/keepalived/keepalived.conf
global_defs {
      router_id centos65
}
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 90
    advert_int 1
    authentication {
       auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.20.10
    }
}
下面的都删除
　　

　　3. service keepalived start; chkconfig keepalived on
ip addr show eth0
　　

　　4. vi /etc/haproxy/haproxy.cfg
注释原有的frontend和backend
listen stats 192.168.20.13:80
        mode http
        stats enable
        stats uri /stats
　　        stats realm HAProxy\ Statistics
        stats auth admin:password
　　
service haproxy start; chkconfig haproxy on

Haproxy使用自己的log：
　　vi /etc/rsyslog.conf
# Provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514

local2.*                                                /var/log/haproxy.log
*.info;mail.none;authpriv.none;cron.none;!local2        /var/log/messages

service rsyslog restart
service haproxy restart
　　

　　针对Apache的haproxy配置：
　　listen apache 192.168.20.10:80
        balance  source
        capture  cookie vgnvisitor= len 32
        cookie  SERVERID insert indirect nocache
        mode  http
        option  forwardfor
        option  httpchk
        option  httpclose
        rspidel  ^Set-cookie:\ IP=
        server web01 192.168.20.35:80 cookie web01 check inter 2000 rise 3 fall 3
        server web02 192.168.20.36:80 cookie web02 check inter 2000 rise 3 fall 3