hadoop生态搭建（3节点）-15.Nginx_Keepalived_Tomcat配置

时间：2023-01-08 08:47:03

# Nginx+Tomcat搭建高可用
服务器名称 预装软件 IP地址
Nginx服务器 Nginx1 192.168.6.131
Nginx服务器 Nginx2 192.168.6.132

# ==================================================================node1 node2

yum -y install gcc gcc-c++ autoconf

# http://www.pcre.org/

# ==================================================================安装 Pcre

scp -r ~/pcre2-10.32.tar.gz node2:~/

tar zxf ~/pcre2-10.32.tar.gz

cd pcre2-10.32

./configure --prefix=/usr/local/pcre && make && make install

rm -rf ~/pcre2-10.32.tar.gz

rm -rf ~/pcre2-10.32

# https://www.openssl.org/source/

# ==================================================================安装 openssl

# 在rabbitmq安装过就不用再执行了

# scp -r ~/openssl-1.1.0g.tar.gz node2:~/

# tar -zvxf ~/openssl-1.1.0g.tar.gz

# cd openssl-1.1.0g

# ./config --prefix=/usr/local/openssl && make && make install

# rm -rf ~/openssl-1.1.0g.tar.gz

# rm -rf ~/openssl-1.1.0g

# http://www.zlib.net/

# ==================================================================安装 zlib

scp -r ~/zlib-1.2.11.tar.gz node2:~/

tar -zxvf ~/zlib-1.2.11.tar.gz

cd zlib-1.2.11

./configure --prefix=/usr/local/zlib && make && make install

rm -rf ~/zlib-1.2.11.tar.gz

rm -rf ~/zlib-1.2.11

# http://nginx.org/download/

# ==================================================================安装 nginx

scp -r ~/nginx-1.14.0.tar.gz node2:~/

tar -zxvf ~/nginx-1.14.0.tar.gz

cd nginx-1.14.0

./configure --prefix=/usr/local/nginx && make && make install

rm -rf ~/nginx-1.14.0.tar.gz

rm -rf ~/nginx-1.14.0

# 环境变量

vi /etc/profile

# 在export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL下添加

export NGINX_HOME=/usr/local/nginx

export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$NGINX_HOME/sbin

# 使环境变量生效

source /etc/profile

# 查看配置结果

echo $NGINX_HOME

# 启动

$NGINX_HOME/sbin/nginx -c $NGINX_HOME/conf/nginx.conf

# 查看Nginx的进程号

ps -ef|grep nginx

# 三种关闭方式 将***替换为具体的进程号

# 从容停止

kill -QUIT ***

# 快速停止

kill -TERM ***

# kill -INT ***

# 强制停止

pkill -9 nginx

# ==================================================================node1

# http://archive.apache.org/dist/tomcat/tomcat-8/v8.5.31/bin/

# ==================================================================安装 tomcat

tar -zxvf ~/apache-tomcat-8.5.31.tar.gz -C /usr/local

mv /usr/local/apache-tomcat-8.5.31 /usr/local/tomcat

rm -rf ~/apache-tomcat-8.5.31.tar.gz

# 环境变量
# ==================================================================node1 node2 node3

vi /etc/profile

# 在export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL下添加

export JAVA_HOME=/usr/java/jdk1.8.0_111

export ZOOKEEPER_HOME=/usr/local/zookeeper-3.4.12

export HADOOP_HOME=/usr/local/hadoop-2.7.6

export MYSQL_HOME=/usr/local/mysql

export HBASE_HOME=/usr/local/hbase-1.2.4

export HIVE_HOME=/usr/local/hive-2.1.1

export SCALA_HOME=/usr/local/scala-2.12.4

export KAFKA_HOME=/usr/local/kafka_2.12-0.10.2.1

export FLUME_HOME=/usr/local/flume-1.8.0

export SPARK_HOME=/usr/local/spark-2.3.0

export STORM_HOME=/usr/local/storm-1.1.0

export ERLANG_HOME=/usr/local/erlang

export RABBITMQ_HOME=/usr/local/rabbitmq_server-3.7.5

export MONGODB_HOME=/usr/local/mongodb-3.4.5

export REDIS_HOME=/usr/local/redis-4.0.10

export RUBY_HOME=/usr/local/ruby-2.5.1

export NGINX_HOME=/usr/local/nginx

export CATALINA_BASE=/usr/local/tomcat

export CATALINA_HOME=/usr/local/tomcat

export TOMCAT_HOME=/usr/local/tomcat

export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$ZOOKEEPER_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$MYSQL_HOME/bin:$HBASE_HOME/bin:$HIVE_HOME/bin:$SCALA_HOME/bin:$KAFKA_HOME/bin:$FLUME_HOME/bin:$SPARK_HOME/bin:$SPARK_HOME/sbin:$STORM_HOME/bin:$ERLANG_HOME/bin:$RABBITMQ_HOME/ebin:$RABBITMQ_HOME/sbin:$MONGODB_HOME/bin:$REDIS_HOME/bin:$RUBY_HOME/bin:$NGINX_HOME/sbin:$CATALINA_HOME/bin

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export HADOOP_INSTALL=$HADOOP_HOME

export HADOOP_MAPRED_HOME=$HADOOP_HOME

export HADOOP_COMMON_HOME=$HADOOP_HOME

export HADOOP_HDFS_HOME=$HADOOP_HOME

export YARN_HOME=$HADOOP_HOME

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native

# ==================================================================node1

# 使环境变量生效

source /etc/profile

# 查看配置结果

echo $CATALINA_BASE

echo $CATALINA_HOME

echo $TOMCAT_HOME

scp -r $CATALINA_HOME node2:/usr/local/

scp -r $CATALINA_HOME node3:/usr/local/

# ==================================================================node2 node3

# 使环境变量生效

source /etc/profile

# 查看配置结果

echo $CATALINA_BASE

echo $CATALINA_HOME

echo $TOMCAT_HOME

# ==================================================================node1 node2 node3

# 启动tomcat

$CATALINA_HOME/bin/startup.sh

# 停止tomcat

$CATALINA_HOME/bin/shutdown.sh

# 远程查看

# http://node1:8080

# http://node2:8080

# http://node3:8080

# Nginx+Tomcat实现Web服务器的负载均衡

服务器名称 预装软件 IP地址
Nginx服务器 Nginx1 192.168.6.131
Nginx服务器 Nginx2 192.168.6.132
Web服务器1 tomcat 192.168.6.131
Web服务器2 tomcat 192.168.6.132
Web服务器3 tomcat 192.168.6.133

# ==================================================================node1

mkdir $CATALINA_HOME/webapps/test

# 编写测试静态页

vi /usr/local/tomcat/webapps/test/login.html

<html>

    <head>

        <meta http-equiv="content-type" content="text/html;charset=UTF-8" />

    </head>

    <body>

        <h1>您正在访问：node1</h1>

		<h1>login.html</h1>

    </body>

</html>

# ==================================================================node2

mkdir /usr/local/tomcat/webapps/test

# 编写测试静态页

vi /usr/local/tomcat/webapps/test/login.html

<html>

    <head>

        <meta http-equiv="content-type" content="text/html;charset=UTF-8" />

    </head>

    <body>

        <h1>您正在访问：node2</h1>

		<h1>login.html</h1>

    </body>

</html>

# ==================================================================node3

mkdir /usr/local/tomcat/webapps/test 

# 编写测试静态页

vi /usr/local/tomcat/webapps/test/login.html

<html>

    <head>

        <meta http-equiv="content-type" content="text/html;charset=UTF-8" />

    </head>

    <body>

        <h1>您正在访问：node3</h1>

		<h1>login.html</h1>

    </body>

</html>

# http://node1:8080/test/login.html
# http://node2:8080/test/login.html
# http://node3:8080/test/login.html

# ==================================================================node1

cp $NGINX_HOME/conf/nginx.conf $NGINX_HOME/conf/nginx.conf.bak

vi $NGINX_HOME/conf/nginx.conf

user nobody;

# 工作进程个数，一般跟服务器cpu核数相等，或者核数的两倍

worker_processes 2;

# 单个进程最大连接数

events{

    worker_connections 1024;

}

http{

    keepalive_timeout 65;

    gzip on;

    # 服务器集群

    upstream tomcatcluster{

        # 集群有几台服务器即可配置几台，weight表示权重，权重越大被访问到的几率越大

        # 启动好Tomcat服务器

        server node1:8080 weight=1 max_fails=2 fail_timeout=30s;

        server node2:8080 weight=1 max_fails=2 fail_timeout=30s;

        server node3:8080 weight=1 max_fails=2 fail_timeout=30s;

    }

    #nginx基本配置

    server{

        listen 8088; #端口号

        server_name node1; #服务名

        location /{

            #将访问请求转向至服务器集群, tomcatcluster 和上面 upstream tomcatcluster 对应

            proxy_pass http://tomcatcluster;

            # 真实的客户端IP

            proxy_set_header   X-Real-IP        $remote_addr;

            # 请求头中Host信息

            proxy_set_header   Host             $host;

            # 代理路由信息，此处取IP有安全隐患

            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

            # 真实的用户访问协议

            proxy_set_header   X-Forwarded-Proto $scheme;

        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {

            root   html;

        }

    }

}

# ==================================================================node2

cp $NGINX_HOME/conf/nginx.conf $NGINX_HOME/conf/nginx.conf.bak

vi $NGINX_HOME/conf/nginx.conf

user nobody;

# 工作进程个数，一般跟服务器cpu核数相等，或者核数的两倍

worker_processes 2;

# 单个进程最大连接数

events{

    worker_connections 1024;

}

http{

    keepalive_timeout 65;

    gzip on;

    # 服务器集群

    upstream tomcatcluster{

        # 集群有几台服务器即可配置几台，weight表示权重，权重越大被访问到的几率越大

        # 启动好Tomcat服务器

        server node1:8080 weight=1 max_fails=2 fail_timeout=30s;

        server node2:8080 weight=1 max_fails=2 fail_timeout=30s;

        server node3:8080 weight=1 max_fails=2 fail_timeout=30s;

    }

    #nginx基本配置

    server{

        listen 8088; #端口号

        server_name node2; #服务名

        location /{

            #将访问请求转向至服务器集群, tomcatcluster 和上面 upstream tomcatcluster 对应

            proxy_pass http://tomcatcluster;

            # 真实的客户端IP

            proxy_set_header   X-Real-IP        $remote_addr;

            # 请求头中Host信息

            proxy_set_header   Host             $host;

            # 代理路由信息，此处取IP有安全隐患

            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

            # 真实的用户访问协议

            proxy_set_header   X-Forwarded-Proto $scheme;

        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {

            root   html;

        }

    }

}

# ==================================================================node1 node2

# 查看Nginx的进程号

ps -ef|grep nginx

# 停止

kill -QUIT ***

# 启动

$NGINX_HOME/sbin/nginx -c $NGINX_HOME/conf/nginx.conf

# http://node1:8088/test/login.html

# http://node2:8088/test/login.html

# Nginx服务器做负载均衡和动静分离，Web服务器1 Web服务器2 Web服务器3 做集群
# ==================================================================node1 node2 node3

mkdir -p $CATALINA_HOME/webapps/test/img

# 上传 testimg.jpg

# ==================================================================node1

cp ~/testimg.jpg $CATALINA_HOME/webapps/test/img/

# 编写测试静态页

vi $CATALINA_HOME/webapps/test/index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Nginx动静分离测试</title>

</head>

    <body>

        <h1>您正在访问：node1</h1>

        <img src="/test/img/testimg.jpg" alt="测试" />

    </body>

</html>

scp -r ~/testimg.jpg node2:$CATALINA_HOME/webapps/test/img/

scp -r ~/testimg.jpg node3:$CATALINA_HOME/webapps/test/img/

# ==================================================================node2

# 编写测试动态页

vi $CATALINA_HOME/webapps/test/index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Nginx动静分离测试</title>

</head>

    <body>

        <h1>您正在访问：node2</h1>

        <img src="/test/img/testimg.jpg" alt="测试" />

    </body>

</html>

# ==================================================================node3

# 编写测试动态页

vi /usr/local/tomcat/webapps/test/index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Nginx动静分离测试</title>

</head>

    <body>

        <h1>您正在访问：node3</h1>

        <img src="/test/img/testimg.jpg" alt="测试" />

    </body>

</html>

# http://node1:8080/test/index.jsp

# http://node2:8080/test/index.jsp

# http://node3:8080/test/index.jsp

# http://node1:8088/test/index.jsp

# http://node2:8088/test/index.jsp

# ==================================================================node1 node2

mkdir -p /data/webapps

# 加入下面的配置

vi $NGINX_HOME/conf/nginx.conf

http{

	server{

		charset    utf-8; #设置编码为utf-8;

		#静态文件交给nginx处理

		location ~ .*\.(htm|html|gif|jpg|jpeg|png|bmp|swf|ioc|rar|zip|txt|flv|mid|doc|ppt|pdf|xls|mp3|wma)$ {

			root  /data/webapps;

			expires 30d;

		}

		#静态文件交给nginx处理

		location ~ .*\.(js|css)?$ {

			root /data/webapps;

			expires 1h;

		}

	}

}

# 查看Nginx的进程号

ps -ef|grep nginx

# 停止

kill -QUIT ***

# 启动

$NGINX_HOME/sbin/nginx -c $NGINX_HOME/conf/nginx.conf

# 测试Nginx动静分离

# http://node1:8088/test/index.jsp

# http://node2:8088/test/index.jsp

mkdir -p /data/webapps/test/img

cp -r $CATALINA_HOME/webapps/test/img /data/webapps/test/

# 测试Nginx动静分离

# http://node1:8088/test/index.jsp

# http://node2:8088/test/index.jsp

shutdown -h now

# 快照 Nginx_Tomcat集群

服务器名称 预装软件 IP地址
Nginx服务器 Nginx1+Keepalived(Master) 192.168.6.131
Nginx服务器 Nginx2+Keepalived(Backup) 192.168.6.132
Web服务器1 tomcat 192.168.6.131
Web服务器2 tomcat 192.168.6.132
Web服务器3 tomcat 192.168.6.133

# Nginx+Keepalived+Tomcat搭建高可用/负载均衡/动静分离的Webserver集群

# 添加虚拟IP（VIP）

# ==================================================================node1

vi /etc/sysconfig/network-scripts/ifcfg-ens33

# BOOTPROTO=dhcp

BOOTPROTO=static

# ONBOOT=no

ONBOOT=yes

IPADDR=192.168.6.131

IPADDR1=192.168.6.141

NETMASK=255.255.255.0

GATEWAY=192.168.6.2

DNS1=192.168.6.2

systemctl restart network

ip addr

# ==================================================================node2

vi /etc/sysconfig/network-scripts/ifcfg-ens33

# BOOTPROTO=dhcp

BOOTPROTO=static

# ONBOOT=no

ONBOOT=yes

IPADDR=192.168.6.132

IPADDR1=192.168.6.142

NETMASK=255.255.255.0

GATEWAY=192.168.6.2

DNS1=192.168.6.2

systemctl restart network

ip addr

# ==================================================================安装 keepalived

yum install -y psmisc

scp -r ~/keepalived-2.0.5.tar.gz node2:~/

tar -zxvf ~/keepalived-2.0.5.tar.gz

cd ~/keepalived-2.0.5

yum -y install libnl libnl-devel

yum install -y libnfnetlink-devel

./configure --prefix=/usr/local/keepalived

make && make install

rm -rf ~/keepalived-2.0.5.tar.gz

cd ~

# 环境变量

# ==================================================================node1 node2

vi /etc/profile

export NGINX_HOME=/usr/local/nginx

export CATALINA_BASE=/usr/local/tomcat

export CATALINA_HOME=/usr/local/tomcat

export TOMCAT_HOME=/usr/local/tomcat

export KEEPALIVED_HOME=/usr/local/keepalived

export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$NGINX_HOME/sbin:$CATALINA_HOME/bin:$KEEPALIVED_HOME/sbin

# 使环境变量生效

source /etc/profile

# 查看配置结果

echo $KEEPALIVED_HOME

# ==================================================================node1 node2

mkdir /etc/keepalived

# cp $KEEPALIVED_HOME/etc/keepalived/keepalived.conf /etc/keepalived/

cp ~/keepalived-2.0.5/keepalived/etc/init.d/keepalived /etc/init.d/

cp $KEEPALIVED_HOME/etc/sysconfig/keepalived /etc/sysconfig/

ln -s $KEEPALIVED_HOME/sbin/keepalived /usr/sbin/

# ln -s $KEEPALIVED_HOME/sbin/keepalived /sbin/

# 设置 keepalived 服务开机启动

chkconfig keepalived on

# 创建并赋予权限

touch $KEEPALIVED_HOME/check_nginx.sh && chmod a+x $KEEPALIVED_HOME/check_nginx.sh

vi $KEEPALIVED_HOME/check_nginx.sh

#!/bin/bash

COUNT=$(ps -C nginx --no-header |wc -l)

echo $COUNT

# 判断Nginx 是否都挂掉了

if [ $COUNT -eq 0 ]

then

	# 如果挂掉了，就启动nginx

	/usr/local/nginx/sbin/nginx

	echo "重启nginx"

	# 等5秒钟后，再次查看是否启动成功

	sleep 5

	# 如果nginx没有启动起来，就直接干掉keepalived

	COUNT=$(ps -C nginx --no-header |wc -l)

	if [ $COUNT -eq 0 ]

	then

		echo "干掉keepalived"

		# 如果killall命令不能使用，就需要安装psmisc工具了

		# yum install -y psmisc

		killall keepalived

	fi

fi

# ==================================================================node1

vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

   # 主服务器，从服务器需修改，表示运行keepalived服务器的一个标识

   # 标识本节点的字条串,通常为hostname

   router_id node1

}

# 监控服务.NGINX mysql等

vrrp_script chk_nginx {

    script "/usr/local/keepalived/check_nginx.sh"

    # 每2s检查一次

    interval 2

    # 每次检查-20

    weight -20

}

vrrp_instance VI_1 {

	# 主从设置 MASTER/BACKUP

    state MASTER

	# 绑定VIP的网络接口，通过ifconfig查看自己的网络接口

    interface ens33

	# 虚拟路由的ID号,两个节点设置必须一样,可选IP最后一段使用,相同的VRID为一个组,他将决定多播的MAC地址

    virtual_router_id 51

	# 节点优先级，值范围0～254，MASTER要比BACKUP高优先级

    priority 100

	# 设定MASTER与BACKUP负载均衡器之间同步检查的时间间隔，两个节点必须设置一样，默认为1秒

    advert_int 1

    authentication {

        auth_type PASS

		# 设定授权密码，密码相同的为一个集群

        auth_pass 1111

    }

	# nginx存活状态检测脚本

    track_script {

        chk_nginx

    }

	# 虚拟ip地址

    virtual_ipaddress {

        192.168.6.150

    }

}

# ==================================================================node2

vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

   # 主服务器，从服务器需修改，表示运行keepalived服务器的一个标识

   # 标识本节点的字条串,通常为hostname

   router_id node1

}

# 监控服务.NGINX mysql等

vrrp_script chk_nginx {

    script "/usr/local/keepalived/check_nginx.sh"

    # 每2s检查一次

    interval 2

    # 每次检查-20

    weight -20

}

vrrp_instance VI_1 {

	# 主从设置 MASTER/BACKUP

    state BACKUP

	# 绑定VIP的网络接口，通过ifconfig查看自己的网络接口

    interface ens33

	# 虚拟路由的ID号,两个节点设置必须一样,可选IP最后一段使用,相同的VRID为一个组,他将决定多播的MAC地址

    virtual_router_id 51

	# 节点优先级，值范围0～254，MASTER要比BACKUP高优先级

    priority 99

	# 设定MASTER与BACKUP负载均衡器之间同步检查的时间间隔，两个节点必须设置一样，默认为1秒

    advert_int 1

    authentication {

        auth_type PASS

		# 设定授权密码，密码相同的为一个集群

        auth_pass 1111

    }

	# nginx存活状态检测脚本

    track_script {

        chk_nginx

    }

	# 虚拟ip地址

    virtual_ipaddress {

        192.168.6.150

    }

}

# ==================================================================node1 node2

# 启动服务

$NGINX_HOME/sbin/nginx -c $NGINX_HOME/conf/nginx.conf

$CATALINA_HOME/bin/startup.sh

service keepalived start

# 停止服务

service keepalived stop

# 重启服务

service keepalived restart

ps -ef | grep keepalived

# 测试

# http://node1:8088/test/index.jsp

# http://192.168.6.150:8088/test/index.jsp

shutdown -h now

# 快照 Nginx_Keepalived_Tomcat

# ==================================================================参考

vi $NGINX_HOME/sbin/nginx.conf

user nobody;

# 工作进程个数，一般跟服务器cpu核数相等，或者核数的两倍

worker_processes 2;

# 单个进程最大连接数

events{

    worker_connections 1024;

}

server{

    listen 8088; #端口号

    server_name node1; #服务名

}

http{

	# 设置默认类型为二进制流

	default_type    application/octet-stream;

	server_names_hash_bucket_size   128;

	#指定来自客户端请求头的headerbuffer大小，设置为32KB

	client_header_buffer_size   32k;

	#指定客户端请求中较大的消息头的缓存最大数量和大小，这里是4个32KB

	large_client_header_buffers 4 32k;

	#上传文件大小

	client_max_body_size 356m;

	#nginx的HttpLog模块指定，指定nginx日志的输出格式，输出格式为access

	log_format access '$remote_addr - $remote_user [$time_local] "$request" '

			'$status $body_bytes_sent "$http_referer" '

			'"$http_user_agent" "$http_x_forwarded_for"';

	#access日志存在未知

	access_log  /var/log/nginx/access.log   access;

	#开启高效模式文件传输模式，将tcp_nopush和tcp_nodelay两个指另设置为on，用于防止网络阻塞。

	sendfile    on;

	tcp_nopush  on;

	tcp_nodelay on;

	#设置客户端连接保持活动的超时时间

	keepalive_timeout   65;

	server_tokens   off;

	#客户端请求主体读取缓存

	client_body_buffer_size 512k;

	proxy_connect_timeout   5;

	proxy_send_timeout      60;

	proxy_read_timeout      5;

	proxy_buffer_size       16k;

	proxy_buffers           4 64k;

	proxy_busy_buffers_size 128k;

	proxy_temp_file_write_size 128k;

	#开启gzip

	gzip    on;

	#允许压缩的最小字节数

	gzip_min_length 1k;

	#4个单位为16k的内存作为压缩结果流缓存

	gzip_buffers 4 16k;

	#设置识别HTTP协议版本，默认是1.1

	gzip_http_version 1.1;

	#gzip压缩比，可在1~9中设置，1压缩比最小，速度最快，9压缩比最大，速度最慢，消耗CPU

	gzip_comp_level 2;

	#压缩的类型

	gzip_types text/plain application/x-javascript text/css application/xml;

	#让前端的缓存服务器混村经过的gzip压缩的页面

	gzip_vary   on;

	# 服务器集群

	upstream tomcatcluster{

		# 集群有几台服务器即可配置几台，weight表示权重，权重越大被访问到的几率越大

		# 启动好Tomcat服务器

		server node1:8080 weight=1;

		server node2:8080 weight=1;

		server node3:8080 weight=1;

	}

	server{

		listen 8088;

		server_name node1;

		charset    utf-8; #设置编码为utf-8;

		#location / {

		#    root   html;

		#    index  index.html index.htm;

		#}

		#location ~ .*\.(jsp|do|action)$

		location / {

			proxy_next_upstream http_502 http_504 error timeout invalid_header;

			proxy_pass http://tomcatcluster;

			# 真实的客户端IP

			proxy_set_header   X-Real-IP        $remote_addr;

			# 请求头中Host信息

			proxy_set_header   Host             $host;

			# 代理路由信息，此处取IP有安全隐患

			proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

			# 真实的用户访问协议

			proxy_set_header   X-Forwarded-Proto $scheme;

		}

		#静态文件交给nginx处理

		location ~ .*\.(htm|html|gif|jpg|jpeg|png|bmp|swf|ioc|rar|zip|txt|flv|mid|doc|ppt|pdf|xls|mp3|wma)$ {

			root  /data/webapps;

			expires 30d;

		}

		#静态文件交给nginx处理

		location ~ .*\.(js|css)?$ {

			root /data/webapps;

			expires 1h;

		}

		error_page   500 502 503 504  /50x.html;

		location = /50x.html {

			root   html;

		}

	}

}

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