WEB服务器负载均衡之HAProxy

安装

wget

tar xzvf haproxy-1.3.20.tar.gz

mv haproxy-1.3.20 /usr/local/haproxy

cd /usr/local/haproxy/

make TARGET=linux26

make install

./haproxy -v

 

HA-Proxy version 1.3.20 2009/08/09
Copyright 2000-2009 Willy Tarreau

 

 

vim haproxy.cfg

 

global
        log 127.0.0.1   local0
        maxconn 4096
        chroot /usr/local/haproxy
        uid 99
        gid 99
        daemon
        nbproc 10
        pidfile /usr/local/haproxy/haproxy.pid
        #debug
        #quiet

defaults
        log     127.0.0.1       local3
        mode    http
        #mode   tcp
        option httplog
        option httpclose
        option dontlognull
        option forwardfor
        option redispatch
        option originalto
        option abortonclose
        retries 2
        maxconn 2000
        balance roundrobin
        #balance source
        #balance leastconn
        stats   uri     /haproxy-stats
        stats auth admin:admin
        stats    refresh   5s
        #stats hide-version
        contimeout      5000
        clitimeout      50000
        srvtimeout      50000
        #timeout check 2000

#set haproxy servers ip adress and port;
listen web_proxy 0.0.0.0:80

#set mode of balance
        #balance source

#set haproxy servers check web servers status;
        #option httpchk GET /check.php
        #option httpchk HEAD /index.php

#set sticky sessions
        cookie SERVERID insert indirect nocache
        #cookie  SERVERID rewrite

#set web servers ip address and port
        server web1 192.168.1.77:80 cookie appinst1 check weight 1
        server web2 192.168.1.78:80 cookie appinst2 check weight 1
        #server web1 192.168.1.77:80 cookie app1inst1 check inter 2000 rise 2 fall 5
        #server web2 192.168.1.78:80 cookie app1inst2 check inter 2000 rise 2 fall 5
        #server web1 192.168.1.77:80 cookie web1 check
        #server web2 192.168.1.78:80 cookie web2 check

 

 

/etc/init.d/

 

vim haproxy

 

#! /bin/sh
 set -e
 PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/haproxy/sbin
 PROGDIR=/usr/local/haproxy
 PROGNAME=haproxy
 DAEMON=$PROGDIR/$PROGNAME
 CONFIG=$PROGDIR/$PROGNAME.cfg
 PIDFILE=$PROGDIR/logs/$PROGNAME.pid
 DESC="HAProxy daemon"
 SCRIPTNAME=/etc/init.d/$PROGNAME

 # Gracefully exit if the package has been removed.
 test -x $DAEMON || exit 0

 start()
 {
         echo -n "Starting $DESC: $PROGNAME"
         $DAEMON -f $CONFIG
         echo "."
 }

 stop()
 {
         echo -n "Stopping $DESC: $PROGNAME"
         haproxy_pid=$(cat $PIDFILE)
         kill -15 $haproxy_pid
         echo "."
 }

 restart()
 {
         echo -n "Restarting $DESC: $PROGNAME"
         $DAEMON -f $CONFIG -p $PIDFILE -sf $(cat $PIDFILE)
         echo "."
 }

 case "$1" in
   start)
         start
         ;;
   stop)
         stop
         ;;
   restart)
         restart
         ;;
   *)
         echo "Usage: $SCRIPTNAME {start|stop|restart}" >&2
         exit 1
         ;;
 esac

exit 0