keepalived+haproxy 安装配置

修改配置文件/etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
      router_id Node_A （另一台Node_B）
}

#vrrp_script check_haproxy {
#    script "/etc/keepalived/check_haproxy.sh"  （如果启用脚本则打开注释）
#    interval 2
#    weight 2
#}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 100 （另一台改为50）
    nopreempt
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 密码（自定义）
    }

#    track_script {
#        check_haproxy
#    }

    virtual_ipaddress {
        VIP/掩码 dev eth0 label eth0:0
    }
}

#!/bin/bash

/etc/init.d/haproxy status &> /dev/null || /etc/init.d/haproxy restart &> /dev/null

if [ $? -ne 0 ]; then
  /etc/init.d/keepalived stop &> /dev/null
fi

listen server （自定义名称）
    bind *:PORT（端口）
    mode tcp
    timeout connect         30s
    timeout client          30s
    timeout server          180s
    timeout check           180s
    no option dontlog-normal
    balance leastconn
    option socket-stats
    option tcplog
    option tcp-check
    tcp-check connect
    server rs1（自定义名称） IP:PORT weight 1 check inter 6000 rise 2 fall 3
    server rs2（自定义名称） IP:PORT weight 1 check inter 6000 rise 2 fall 3

listen server VIP:PORT

如果遇到本机没有VIP，不能启动haproxy
修改/etc/sysctl.conf文件
net.ipv4.ip_nonlocal_bind = 1

sysctl -p

修改/etc/rsyslog.conf

打开下面两行的注释
$ModLoad imudp
$UDPServerRun 514

添加
local2.*       /var/log/haproxy.log

重启/etc/init.d/rsyslog restart