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前言

以LNMP为例，一个企业内部最基础的架构组成需要一个处理静态Web服务的页面，一个动态Web服务的页面和数据库
而我们实现了在Linux平台上，实现了Nginx + PHP 实现动静分离，而实际生产中往往一台nginx 需要“对应”多个动态处理的服务（及tomcat），所以如何将前端接收到的动态请求转交给后端多个tomcat处理，

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两台tomcat 一台nginx

nginx 192.168.32.10
tomcat1 192.168.32.20
tomcat2 192.168.32.40

Nginx主机安装

systemctl stop firewalld.service
systemctl disable firewalld.service
setenforce 0

yum install -y pcre-devel zlib-devel openssl-devel gcc gcc-c++ make

useradd -M -s /sbin/nologin nginx
cd /opt
tar zxvf nginx-1.15.9.tar.gz -C /opt/

cd nginx-1.15.9/
./configure
–prefix=/usr/local/nginx
–user=nginx
–group=nginx
–with-file-aio
–with-http_stub_status_module
–with-http_gzip_static_module
–with-http_flv_module
–with-http_ssl_module

make && make install

ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin/

vim /lib/systemd/system/nginx.service
[Unit]
Description=nginx
After=network.target
[Service]
Type=forking
PIDFile =/usr/local/nginx/logs/nginx.pid
ExecStart=/usr/local/nginx/sbin/nginx
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true
[Install]
WantedBy=multi-user.target

chmod 754 /lib/systemd/system/nginx.service
systemctl start nginx.service
systemctl enable nginx.service

安装启动 Tomcat

① 解压apache-tomcat软件包
cd /opt
rpm -ivh jdk-8u201-linux-x64.rpm

tar zxvf apache-tomcat-9.0.16.tar.gz
mv apache-tomcat-9.0.16 /usr/local/tomcat

Tomcat 配置

vim /etc/profile.d/java.sh			
export JAVA_HOME=/usr/java/jdk1.8.0_201-amd64
export CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
export PATH=$JAVA_HOME/bin:$PATH
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加载生效、查看版本

source /etc/profile.d/java.sh
java -version

启动tomcat

优化管理
ln -s /usr/local/tomcat/bin/startup.sh /usr/local/bin/
ln -s /usr/local/tomcat/bin/shutdown.sh /usr/local/bin/
开启服务
startup.sh
netstat -natp | grep 8080

另外一台tomcat一样的安装方法。。

动静分离配置

1、Tomcat1 server 配置

mkdir /usr/local/tomcat/webapps/test
vim /usr/local/tomcat/webapps/test/index.jsp     #动态页面的配置
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>





<% out.println("动态页面 1,http://www.test1.com");%>


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添加虚拟主机配置

vim /usr/local/tomcat/conf/server.xml
删除原host端和valve端
   
   		#新增
---》wq
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shutdown.sh
startup.sh

Tomcat2 server 配置

mkdir /usr/local/tomcat/webapps/test
vim /usr/local/tomcat/webapps/test/index.jsp     #动态页面的配置
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>





<% out.println("动态页面 2,http://www.test2.com");%>


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配置虚拟主机

vim /usr/local/tomcat/conf/server.xml    #修改配置文件 

   
   
   		#新增
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#重启服务
shutdown.sh
startup.sh

Nginx server 配置

#准备静态页面
echo '
this is static
' > /usr/local/nginx/html/index.html
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vim /usr/local/nginx/conf/nginx.conf

配置负载均衡的服务器列表，weight参数表示权重，权重越高，被分配到的概率越大

   #gzip  on;
    upstream tomcat_server {
      server 192.168.32.20:8080 weight=1;
      server 192.168.32.40:8081 weight=1;
    }

    server {
        listen       80;
        server_name  www.liuxu.com;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;
        location ~ .*\.jsp$ {
            proxy_pass http://tomcat_server;
            proxy_set_header HOST $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        location / {
            root   html;
            index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
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测试访问

http://192.168.32.10

http://192.168.32.10/index.jsp 刷新一下