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Part3 七层http负载均衡.md

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haproxy 七层 http 负载均衡

环境准备

192.168.140.149		#haproxy节点一，负载均衡代理端口80

192.168.140.150		#haproxy节点二，负载均衡代理端口80

192.168.140.149		#tomcat应用节点一，服务端口8888

192.168.140.150		#tomcat应用节点二，服务端口8888

两台服务器配置tomcat应用

安装jdk1.8并配置好环境变量

tomcat安装包下载地址：https://tomcat.apache.org/download-10.cgi

下载安装包：apache-tomcat-10.0.12.tar.gz

上传到服务器目录：/usr/local/software

解压配置tomcat，输入命令：

	cd /usr/local/software
	
	tar -zxvf ./apache-tomcat-10.0.12.tar.gz
	
	cd ./apache-tomcat-10.0.12/webapps
	
	rm -rf ./*
	
	mkdir ROOT
	
	ifconfig ens33 | grep "inet " | awk '{ print $2}' > ./ROOT/index.html

更改运行端口，修改http端口为8888，输入命令：

	cd /usr/local/software/apache-tomcat-10.0.12
	
	vi ./conf/server.xml

启动应用，输入命令：

	cd /usr/local/software/
	
	mv ./apache-tomcat-10.0.12 ../
	
	cd /usr/local/apache-tomcat-10.0.12/
	
	./bin/startup.sh

服务器配置haproxy

编辑配置文件，输入命令：
	
	cd /usr/local/haproxy
	
	vi ./conf/haproxy.cfg

	=>
	
		listen websites
		bind *:80
		mode http
		log global
		maxconn 1024
		balance roundrobin
		server tomcat149 192.168.140.149:8888 check inter 2000 fall 5
		server tomcat150 192.168.140.150:8888 check inter 2000 fall 5

重启haproxy

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

访问测试

浏览器输入以下地址：

	http://192.168.140.149/
	
	http://192.168.140.150/

不停刷新地址，会轮询访问到两个tomcat