下载tomcat

#wget https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.0.36/bin/apache-tomcat-8.0.36.tar.gz

安装

#tar -zxvf apache-tomcat-8.0.36.tar.gz

下载jdk1.8：

首先查找是否已经安装

#rpm -qa | grep jdk

如果显示为空，则表示没有安装jdk

#wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept- securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u91-b14/jdk-8u91-linux-x64.rpm

加粗的地址，根据需求选择自己的jdk版本

安装jdk

#rpm -ivhjdk-8u91-linux-x64.rpm

安装在/usr/java/

在/etc/profile 配置环境变量

下载haproxy

#wgethaproxy-1.5.4-3.el6.x86_64.rpm

安装

#rpm -ivhhaproxy-1.5.4-3.el6.x86_64.rpm

先备份haproxy的@R_404_382@

# cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.back

#vim /etc/haproxy/haproxy.cfg

global
log 127.0.0.1 local2 #使用本机 syslog服务的local2 设备记录错误信息

chroot /var/lib/haproxy #当前工作目录
pidfile /var/run/haproxy.pid #定义haproxy的pid
maxconn 4000 #最大并发连接数
user haproxy #haproxy 的用户
group haproxy #haproxy 的组
daemon #后台方式运行
# turn on stats unix socket
stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http #mode{http|tcp|health} 运行模式或协议 http是七层模式，tcp是四层模式，health是健康监测 返回ok
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s #请求超时时间
timeout queue 1m
timeout connect 10s #连接超时时间
timeout client 1m #客户端超时
timeout server 1m #服务器超时
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000 #最大连接数量

stats uri /haproxy_status #监控页面地址

#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend main *:5000 #监听端口 5000
acl url_static path_beg -i /static /images /javascript /stylesheets
acl url_static path_end -i .jpg .gif .png .css .js

use_backend static if url_static
default_backend app

#---------------------------------------------------------------------
# static backend for serving up images,stylesheets and such
#---------------------------------------------------------------------
backend static
balance roundrobin
server static 127.0.0.1:4331 check

#---------------------------------------------------------------------
# round robin balancing between the varIoUs backends
#---------------------------------------------------------------------
backend app
balance roundrobin
server app1 127.0.0.1:8080 check
server app2 127.0.0.1:5002 check
server app3 127.0.0.1:5003 check
server app4 127.0.0.1:5004 check

配置完

重新加载HAProxy的@R_404_382@

/etc/init.d/harpoxy reload

启动Haproxy， 启动命令如下所示：
haproxy -f /etc/haproxy/haproxy.cfg

开启tomcat

#./startup.sh

输入网址，显示

输入网址，显示出如下。

可以看到app1已经启动了，显示绿色

也可以根据命令看是否启动

# ps -ef | grep haproxy
haproxy 3725 1 0 12:28 ? 00:00:01 /usr/sbin/haproxy -D -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -sf 3648
haproxy 4572 1 0 14:14 ? 00:00:00 /usr/sbin/haproxy -D -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -sf 4562
haproxy 4586 1 0 14:18 ? 00:00:00 /usr/sbin/haproxy -D -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -sf 4574
haproxy 4588 1 0 14:18 ? 00:00:00 haproxy -f /etc/haproxy/haproxy.cfg
root 4594 4352 0 14:25 pts/1 00:00:00 grep haproxy

停止haproxy

killall haproxy