Haproxy入门(安装篇)

一、安装部署

1.1 下载需要的haproxy版本并上传到服务器上

wget http://pkgs.fedoraproject.org/repo/pkgs/haproxy/haproxy-1.7.9.tar.gz

下载.png

1.2 解压haproxy

tar -zxvf haproxy-1.7.9.tar.gz
cd haproxy-1.7.9

查看linux内核版本
版本.png

1.3 安装

make TARGET=linux26 prefix=/usr/local/haproxy

编译.png

make install PREFIX=/usr/local/haproxy

安装.png

参数说明：
TARGET=linux26
#使用uname -r查看内核，如：2.6.18-371.el5，此时该参数就为linux26
#kernel 大于2.6.28的用：TARGET=linux2628
CPU=x86_64   #使用uname -r查看系统信息，如x86_64 x86_64 x86_64 GNU/Linux，此时该参数就为x86_64
PREFIX=/usr/local/haprpxy   #/usr/local/haprpxy为haprpxy安装路径

1.4 设置HAproxy

haproxy的配置文件需要自己创建
mkdir /usr/local/haproxy/conf/
mkdir /usr/local/haproxy/logs

1.5 配置haproxy.cfg参数

vim /usr/local/haproxy/haproxy.cfg

填写以下内容：

    global
    log    127.0.0.1 local3
    chroot  /usr/local/haproxy
    pidfile  /usr/local/haproxy/logs/haproxy.pid
    maxconn  4000
    uid 99
    gid 99
    daemon
    nbproc 1
    stats socket /usr/local/haproxy/haproxy.sock level admin
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will 
# use if not designated in their block
#---------------------------------------------------------------------
defaults
        log     global
        option dontlognull
        option redispatch
        mode http
        timeout connect      5000
        timeout client      50000
        timeout server      50000
listen stats
        mode http
        bind 172.31.8.102:8888
        stats enable
        stats   uri    /haproxy-status
        stats  auth haproxy:haproxy
            stats hide-version
        stats admin if TRUE
########################################################################
backend test-web
        mode http
        acl being_scanned be_conn gt 1500
        http-request deny if being_scanned
        option httplog
        option httpclose
        option forwardfor
        log global

        server mobile-node9  172.31.8.24:80 cookie web1 check inter 500 rise 3 fall 3

1.6 启动haproxy

/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg

查看haproxy启动进程
进程.png
配置文件设置的访问用户名和密码为haproxy，web访问IP为172.31.8.102端口号为8888

1.7 使用浏览器进行访问测试

http://172.31.8.102:8888/haproxy-status

1.8 测试

1.8.1 启动nginx服务，检测到的状态为正常

控制台.png

1.8.2 停掉nginx服务，检测到的状态为DOWN

状态检测.png

1.9 编写haproxy启动脚本

vim haproxy.sh

填写入以下内容：

#!/bin/bash
BASE_DIR="/usr/local/haproxy"
ARGV="$@"
pp=`ps -fe |grep haproxy |grep -v "grep" |grep -v "haproxy.sh"|awk '{print $2}'`

start()
{
echo "START HAPoxy SERVERS OK"
$BASE_DIR/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg
}

stop()
{
kill -9 $pp
echo "STOP HAPoxy Listen OK"
}
case $ARGV in

start)
start
ERROR=$?
;;

stop)
stop
ERROR=$?
;;

restart)
stop
start
ERROR=$?
;;

*)
echo "haproxy.sh [start|restart|stop]"
esac
exit $ERROR

1.9.1 给脚本执行权限

chmod +x haproxy.sh

1.9.2 脚本验证

验证.png
安装验证正常，HAproxy安装完毕（以上为haproxy单节点安装，启动脚本、haproxy.cfg配置文件可看下面汇总内容）

二、配置文件汇总:

2.1 haproxy.cfg 配置文件

    global
    log    127.0.0.1 local3
    chroot  /usr/local/haproxy
    pidfile  /usr/local/haproxy/logs/haproxy.pid
    maxconn  4000
    uid 99
    gid 99
    daemon
    nbproc 1
    stats socket /usr/local/haproxy/haproxy.sock level admin
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will 
# use if not designated in their block
#---------------------------------------------------------------------
defaults 
        log     global
        option dontlognull 
        option redispatch 
        mode http
        timeout connect      5000 
        timeout client      50000 
        timeout server      50000 
listen stats
        mode http
        bind 172.31.8.102:8888
        stats enable
        stats   uri    /haproxy-status 
        stats  auth haproxy:haproxy
            stats hide-version
        stats admin if TRUE                  
########################################################################
backend test-web
        mode http
        acl being_scanned be_conn gt 1500
        http-request deny if being_scanned
        option httplog
        option httpclose
        option forwardfor
        log global

        server mobile-node9  172.31.8.24:80 cookie web1 check inter 500 rise 3 fall 3
        server mobile-node8  172.31.8.102:80 cookie web1 check inter 500 rise 3 fall 3

2.2 haproxy.sh 启动脚本：

#!/bin/bash
BASE_DIR="/usr/local/haproxy"
ARGV="$@"
pp=`ps -fe |grep haproxy |grep -v "grep" |grep -v "haproxy.sh"|awk '{print $2}'`

start()
{
echo "START HAPoxy SERVERS OK"
$BASE_DIR/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg
}

stop()
{
kill -9 $pp
echo "STOP HAPoxy Listen OK"
}
case $ARGV in

start)
start
ERROR=$?
;;

stop)
stop
ERROR=$?
;;

restart)
stop
start
ERROR=$?
;;

*)
echo "haproxy.sh [start|restart|stop]"
esac
exit $ERROR