keepalived haproxy 实现web 双主模型的高可用负载均衡

[root@node2 ~]# yum -y install haproxy  安装haproxy

[root@node2 ~]# vim /etc/haproxy/haproxy.cfg

    #

    log         127.0.0.1 local2

    chroot      /var/lib/haproxy

    pidfile     /var/run/haproxy.pid

    maxconn     4000

    user        haproxy

    group       haproxy

    daemon

    # turn on stats unix socket

    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------

# common defaults that all the 'listen' and 'backend' sections will

# use if not designated in their block

#---------------------------------------------------------------------

defaults

    mode                    http      指定haproxy工作模式为http

    log                     global

    option                  httplog

    option                  dontlognull

    option http-server-close       当客户端超时时，允许服务端断开连接

    option forwardfor       except 127.0.0.0/8  在http的响应头部加入forwardfor

    option                  redispatch    #在使用了基于cookie的会话保持的时候，通常加这么一项，一旦后端某一server宕机时，能够将其会话重新派发到其它的upstream servers

    retries                 3

    timeout http-request    10s

    timeout queue           1m

    timeout connect         10s

    timeout client          1m

    timeout server          1m

    timeout http-keep-alive 10s

    timeout check           10s

    maxconn                 3000

#---------------------------------------------------------------------

# main frontend which proxys to the backends

#---------------------------------------------------------------------

frontend  main *:80  前端代理

    acl url_static       path_beg       -i /static /images /javascript /stylesheets

    acl url_static       path_end       -i .jpg .gif .png .css .js

    acl url_dynamic      path_end       -i .php

    use_backend static          if url_static

    default_backend             dynamic

#---------------------------------------------------------------------

# static backend for serving up images, stylesheets and such

#---------------------------------------------------------------------

backend static   后端的静态请求响应

    balance     roundrobin

    server      static 192.168.1.100:80 inter 3000 rise 2 fall 3 check maxconn 5000

#---------------------------------------------------------------------

# round robin balancing between the various backends

#---------------------------------------------------------------------

backend dynamic   后端的动态请求响应

    balance     roundrobin

    server  dynamic1 192.168.1.101:80 inter 3000 rise 2 fall 3 check maxconn 5000

    server  dynamic2 192.168.1.102:80 inter 3000 rise 2 fall 3 check maxconn 5000

listen statistics

        mode http

        bind *:8080

~       stats enable

        stats auth admin:admin

        stats uri /admin?stats   指定URI的访问路径

        stats admin if TRUE

        stats hide-version

        stats refresh 5s

        acl allow src 192.168.0.0/24   定义访问控制列表

        tcp-request content accept if allow

        tcp-request content reject