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Haproxy配置http模式负载均衡
环境准备:
主机名 | 角色 | IP地址 |
mylinux1.contoso.com | haproxy服务器 | eth0:192.168.100.121 eth1:172.16.100.121 |
mylinux3.contoso.com | web服务器1 | eth0:192.168.100.181 |
mylinux4.contoso.com | web服务器2 | eth0:192.168.100.182 |
一、准备工作
在mylinux3和mylinux4上安装http服务,并启动。
yum -y install httpd /etc/init.d/httpd start
使用浏览器访问,保证服务正常。
二、修改haproxy配置文件
[root@mylinux1 conf]# cp haproxy.cfg haproxy.cfg.bak [root@mylinux1 conf]# vi haproxy.cfg [root@mylinux1 conf]# cat haproxy.cfg # this config needs haproxy-1.1.28 or haproxy-1.2.1 global #log 127.0.0.1 local0 log 127.0.0.1:514 local0 warning pidfile /usr/local/haproxy/var/run/haproxy.pid daemon maxconn 4096 chroot /usr/local/haproxy/var/chroot user haproxy group haproxy nbproc 1 defaults log global mode http #默认的模式{tcp|http|health},tcp是4层,http是7层,health只会返回OK retries 3 option httplog #日志类别,采用httplog option httpclose #每次请求完毕后主动关闭http通道,haproxy不支持keep-alive,只能模拟这种模式的实现 option dontlognull #不记录健康检查日志信息 option forwardfor #如果后端服务器需要获得客户端真实ip需要配置的参数,可以从Http Header中获得客户端ip option redispatch #当serverId对应的服务器挂掉后,强制定向到其他健康的服务器 maxconn 2000 balance roundrobin #设置默认负载均衡方式,轮询方式 timeout connect 5000 timeout client 50000 timeout server 50000 listen haproxy_stats bind *:8000 #绑定到本地所有IP地址的8000端口上 mode http #http的7层模式 option httplog #采用http日志格式 maxconn 20 #默认的最大连接数 stats enable #启用状态监控 stats refresh 30s #监控页面自动刷新时间 stats uri /haproxy_status #监控页面url stats auth admin:123456 #设置监控页面的用户名和密码,可以设置多个用户名 stats hide-version #隐藏监控页面上的Haproxy版本信息 listen websites bind 192.168.100.121:80 #绑定到192.168.100.121上的80端口 timeout server 15s timeout connect 30s server mylinux3 192.168.100.181:80 check port 80 inter 2000 fall 3 #检测健康端口80,检测心跳频率是2000ms,失败3次则认为服务器不可用 server mylinux4 192.168.100.182:80 check port 80 inter 2000 fall 3
三、启动haproxy并测试
1、启动haproxy
[root@mylinux1 conf]# /usr/local/haproxy/sbin/haproxy -f haproxy.cfg -c Configuration file is valid [root@mylinux1 conf]# /usr/local/haproxy/sbin/haproxy -f haproxy.cfg -D [root@mylinux1 conf]# ps -ef|grep haproxy haproxy 2575 1 0 23:24 ? 00:00:00 /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/haproxy.cfg root 2584 1015 0 23:45 pts/1 00:00:00 grep haproxy
2、测试haproxy监控页面
3、web访问测试
4、后端节点负载测试
首先使用curl测试一下获取网页内容:
[root@mylinux1 conf]# curl -s http://192.168.100.121
<html>
<head>
<title>Web1</title>
</head>
<body>
<p align="center">
<span style="color:blue;font-size:24px">Web Site 1</span>
</p>
<hr />
<h1 align="center">mylinux3.contoso.com</h1>
</body>
</html>
[root@mylinux1 conf]# curl -s http://192.168.100.121
<html>
<head>
<title>Web2</title>
</head>
<body>
<p align="center">
<span style="color:blue;font-size:24px">Web Site 2</span>
</p>
<hr />
<h1 align="center">mylinux4.contoso.com</h1>
</body>
</html>
然后使用for循环测试100次,并将100次的结果全部追加到一个文件中去,最后检查每个节点出现的次数:
[root@mylinux1 conf]# for i in {1..100};do curl http://192.168.100.121/ >>/tmp/webtest.txt;done [root@mylinux1 conf]# grep mylinux3.contoso.com /tmp/webtest.txt |wc -l 50 [root@mylinux1 conf]# grep mylinux4.contoso.com /tmp/webtest.txt |wc -l 50
结果是mylinux3和mylinux4都访问了50次,证明轮询方式下负载是一样的。
四、haproxy启动停止脚本
#!/bin/bash # BASE=/usr/local/haproxy PROG=$BASE/sbin/haproxy PIDFILE=$BASE/var/run/haproxy.pid CONFFILE=$BASE/conf/haproxy.cfg RUNNING_STATUS=`ps -ef|grep "haproxy -f"|egrep -v grep|wc -l` start(){ RUNNING_STATUS=`ps -ef|grep "haproxy -f"|egrep -v grep|wc -l` if [ $RUNNING_STATUS -ge 1 ];then echo "Haproxy is already running! Exit now." exit 1 else $PROG -f $CONFFILE [ $? -eq 0 ] && echo "Start haproxy successful." || echo "Start haproxy failed." fi } stop(){ if [ $RUNNING_STATUS -lt 1 ];then echo "Haproxy is not running. Stop haproxy failed!" else kill -9 $(cat $PIDFILE) [ $? -eq 0 ] && echo "Stop haproxy successful." || echo "Stop haproxy failed." rm -rf $PIDFILE fi } reload(){ if [ ! -f $PIDFILE ];then echo "No pid file found. Maybe you need to check haproxy status first." exit 1 else $PROG -f $CONFFILE -sf $(cat $PIDFILE) fi } status(){ if [ $RUNNING_STATUS -ge 1 ];then PID_NUM=`cat $PIDFILE` echo "Haproxy (pid $PID_NUM) is running..." else echo "Haproxy is stopped." fi } check(){ $PROG -f $CONFFILE -c } case $1 in start) start ;; stop) stop ;; restart) stop start ;; reload) reload ;; status) status ;; check) check ;; *) echo "USAGE: $0 start|stop|restart|reload|check ." exit 1 ;; esac
测试一下:
[root@mylinux1 ~]# cp haproxy /etc/init.d/ [root@mylinux1 ~]# ll /etc/init.d/haproxy -rwxr-xr-x 1 root root 1567 Oct 1 00:06 /etc/init.d/haproxy [root@mylinux1 ~]# service haproxy status Haproxy (pid 2575) is running... [root@mylinux1 ~]# service haproxy stop Stop haproxy successful. [root@mylinux1 ~]# service haproxy start Start haproxy successful. [root@mylinux1 ~]# service haproxy restart Stop haproxy successful. Start haproxy successful. [root@mylinux1 ~]# service haproxy status Haproxy (pid 2796) is running... [root@mylinux1 ~]# service haproxy reload [root@mylinux1 ~]# service haproxy status Haproxy (pid 2822) is running... [root@mylinux1 ~]# service haproxy check Configuration file is valid
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Haproxy配置http模式负载均衡