haproxy安装配置

# tar -zxvf haproxy-1.7.1.tar.gz
# cd haproxy-1.7.1
# make TARGET=linux26 PREFIX=/usr/local/haproxy           #将haproxy安装到/usr/local/haproxy
# make install PREFIX=/usr/local/haproxy
# cd /usr/local/haproxy
# vi haproxy.cfg

haproxy/sbin/haproxy -v  查看版本
vi /etc/rsyslog.conf
去掉下面两行前面的#号
$ModLoad imudp
$UDPServerRun 514
添加 localhaproxy.* /usr/local/haproxy/log/haproxy.log
重启rsyslog： systemctl restart rsyslog （systemctl 需安装工具包）

启动服务：
# /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg
重启服务：
# /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg -st `cat /usr/local/haproxy/logs/haproxy.pid`  (没有换行)
停止服务：
# killall haproxy
在浏览器中输入haproxy监控地址:http://10.112.178.108:1080/haproxy-admin,如图所示

haproxy.cfg配置（/haproxy/haproxy-1.7.1/examples下有各种配置样例）
global
        log 127.0.0.1 local3
        #log 127.0.0.1 localhaproxy0 notice
    maxconn 4096  #最大连接数
defaults
        log global
        mode http
    option httplog       #日志类别,采用httplog
        option dontlognull   #不记录健康检查日志信息
    #retries 2            #2次连接失败不可用
        option forwardfor    #后端服务获得真实ip
        option httpclose     #请求完毕后主动关闭http通道
        option abortonclose  #服务器负载很高，自动结束比较久的链接  
        timeout connect 5s
        timeout client 5s
        timeout server 5s
    #timeout check 10s    #心跳检测超时  
        balance roundrobin   #负载均衡方式，轮询
########统计页面配置########
    listen stats  
    bind 0.0.0.0:1080
    mode http
    option httplog
    log 127.0.0.1 local3 err
    #stats refresh 30s
    #maxconn 10               #最大连接数  
    stats uri /admin         #状态页面 http//ip:1080/admin访问  
    stats realm Haproxy\ Statistics
    stats auth admin:admin   #用户和密码:admin
    stats hide-version       #隐藏版本信息  
    stats admin if TRUE      #设置手工启动/禁用
frontend myfrontend
        # primary cert is /etc/cert/server.pem
        # /etc/cert/certdir/ contains additional certificates for SNI clients
        #bind :443 ssl crt /etc/cert/server.pem crt /etc/cert/certdir/
        bind :1081
        default_backend mybackend
backend mybackend
        # a http backend
        #server s3 10.0.0.3:80
    server  web1 10.112.178.108:11103 #cookie 1 weight 5 check inter 2000 rise 2 fall 3
        server  web2 10.112.178.108:50001
        # a https backend
        #server s4 10.0.0.3:443 ssl verify none

http://10.112.178.108:1080/admin
http://10.112.178.108:1081/cashier-task/   访问此链接，可发现两个端口的服务切换显示

**************************************** mq 负载均衡

defaults
        mode http
        timeout connect 5s
        timeout client 5s
        timeout server 5s
listen stats
    bind 0.0.0.0:1080
    mode http
    option httplog
    log 127.0.0.1 local3 err
    #stats refresh 30s
    #maxconn 10
    stats uri /admin
    stats realm Haproxy\ Statistics
    stats auth admin:admin
    stats hide-version
    stats admin if TRUE
frontend myfrontend
        # primary cert is /etc/cert/server.pem
        # /etc/cert/certdir/ contains additional certificates for SNI clients
        #bind :443 ssl crt /etc/cert/server.pem crt /etc/cert/certdir/
        bind :5670
        mode tcp  #tcp模式
        option    clitcpka
        default_backend mybackend
backend mybackend
        # a http backend
        mode tcp
        option srvtcpka
        option redispatch
        balance roundrobin
        option tcp-check
        server m3 192.168.89.131:5672
        server m4 192.168.89.131:5673
        # a https backend
        #server s4 10.0.0.3:443 ssl verify none

测试结果：5670端口连接mq，连接4次会平均分配到5672和5673两台服务上