Haproxy Configuring HTTP Mode load Balancing

Environment Preparation:

Host Name	Role	IP Address
my linux1.contoso.com	eth1 : 172.16.100.121
Mylinux3.contoso.com	Web server 1	eth0:192.168.100.181
Mylinux4.contoso.com	Web server 2	eth0:192.168.100.182

First, the preparatory work

Install the HTTP service on MYLINUX3 and mylinux4 and start.

Yum-y Install httpd/etc/init.d/httpd Start

Use browser access to ensure proper service.

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Second, modify the Haproxy configuration file

[[email protected] conf]# cp haproxy.cfg haproxy.cfg.bak[[email protected]  conf]# vi haproxy.cfg[[email protected] conf]# cat haproxy.cfg# this  config needs haproxy-1.1.28 or haproxy-1.2.1global          #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 is Layer 4, HTTP is level 7, health will only return ok           retries 3        option  httplog     #日志类别, using Httplog        option  httpclose       #每次请求完毕后主动关闭http通道, Haproxy does not support keep-alive, only simulates the implementation of this pattern            option  dontlognull    #不记录健康检查日志信息          option  forwardfor    # If the backend server needs to be configured for the client's real IP, the client can be obtained from Http header ip           option  redispatch    #When the ServerID corresponding server is hung, force the redirect to other healthy servers         maxconn 2000         balance roundrobin     #设置默认负载均衡方式, polling method          timeout connect 5000         timeout client  50000        timeout  server  50000        listen  haproxy_stats         bind   *:8000    # Bind to port 8000 on all IP addresses on-premises         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, you can set multiple usernames          stats hide-version           # Hide Haproxy version information on the monitoring page         listen  websites         bind  192.168.100.121:80     # Bind to port 80 on 192.168.100.121         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, detects that the heartbeat is 2000ms and fails 3 times to think the server is unavailable         server   Mylinux4  192.168.100.182:80 check port 80 inter 2000 fall 3

Third, start Haproxy and test

1. Start Haproxy

[Email protected] conf]#/usr/local/haproxy/sbin/haproxy-f haproxy.cfg-cconfiguration file is valid[[email protected]      conf]#/usr/local/haproxy/sbin/haproxy-f haproxy.cfg-d[[email protected] conf]# ps-ef|grep haproxyhaproxy 2575        1 0 23:24? 00:00:00/usr/local/haproxy/sbin/haproxy-f/usr/local/haproxy/conf/haproxy.cfgroot 2584 1015 0 23:45 pts/1 00 : 00:00 grep haproxy

2. Test Haproxy Monitoring Page

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3. Web Access Testing

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4, back-end node load test

First use Curl to test the content of the Web page:

[Email protected] conf]# curl-s http://192.168.100.121

<title>Web1</title>

<body>

<p align= "center" >

<span style= "color:blue;font-size:24px" >web Site 1</span>

</p>

<H1 align= "center" >mylinux3.contoso.com

</body>

[Email protected] conf]# curl-s http://192.168.100.121

<title>Web2</title>

<body>

<p align= "center" >

<span style= "color:blue;font-size:24px" >web Site 2</span>

</p>

<H1 align= "center" >mylinux4.contoso.com

</body>

Then test 100 times with the For loop and append all 100 results to a file, and finally check the number of occurrences of each node:

[[email protected] conf]# for i in {1..100};d o Curl http://192.168.100.121/>>/tmp/webtest.txt;done[[email Protected] conf]# grep mylinux3.contoso.com/tmp/webtest.txt |wc-l50[[email protected] conf]# grep mylinux4.contoso.com /tmp/webtest.txt |wc-l50

The result is that both mylinux3 and mylinux4 have visited 50 times, proving that the polling mode is the same as the load.

Iv. haproxy Start Stop script

#!/bin/bash#base=/usr/local/haproxyprog= $BASE/sbin/haproxypidfile= $BASE/var/run/haproxy.pidconffile= $BASE/conf /haproxy.cfgrunning_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      ;; &Nbsp;    restart)          stop          start     ;;      reload)          reload      ;;      status)          status      ;;      check)          check      ;;      *)          echo  "usage: $ 0 start|stop|restart|reload|check . "          exit 1     ;; Esac

Test it:

[[email protected] ~]# cp haproxy /etc/init.d/[[email protected] ~]#  ll /etc/init.d/haproxy -rwxr-xr-x 1 root root 1567 oct  1  00:06 /etc/init.d/haproxy[[email protected] ~]# service haproxy statushaproxy   (pid  2575)  is running ... [[Email protected] ~]# service haproxy stopstop haproxy successful. [[Email protected] ~]# service haproxy startstart haproxy successful. [[Email protected] ~]# service haproxy restartstop haproxy successful. Start haproxy successful. [[email protected] ~]# service haproxy statushaproxy  (pid  2796)   Is running ... [[email protected] ~]# service haproxy reload[[email protected] ~]#  Service haproxy statushaproxy  (pid  2822)  is running ... [[email protected] ~]# service haproxy checkconfiguration file is  Valid

This article is from "it Little two lang" blog, please make sure to keep this source http://jerry12356.blog.51cto.com/4308715/1858239

Haproxy Configuring HTTP Mode load Balancing