这篇文章主要介绍了关于nginx负载调度器+双tomcat负载及会话共享+mysql后端数据库，有着一定的参考价值，现在分享给大家，有需要的朋友可以参考一下
Nginx负载调度器+双Tomcat负载及会话复制+MySQL后端数据库
环境：
| IP | 作用 |
|---|---|
| 192.168.2.5 | nginx |
| 192.168.2.6 | tomcat1 |
| 192.168.2.7 | tomcat2 |
| 192.168.2.8 | mysql |
一、session共享之前配置
步骤：
①关闭防火墙或者开放端口80，8080，3306，关闭selinux
②安装nginx
从nginx官网下载最新版 wget http://nginx.org/download/nginx-1.13.9.tar.gz
[root@192 ~]# yum -y install pcre-devel zlib-devel gcc gcc-c++ make
[root@192 ~]# useradd -M -s /sbin/nologin nginx
[root@192 ~]# tar zxf nginx-1.13.9.tar.gz -C /usr/src
[root@192 ~]# cd /usr/src/nginx-1.13.9/
[root@192 nginx-1.13.9]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_stub_status_module && make && make install
[root@192 ~]# ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin
不启动nginx
③两台tomcat主机进行安装
jdk从官网下载需要许可，允许之后下载至本地，导入主机 tomcat从官网downloads找到tomcat7.0或者更高版本 wget http://mirror.bit.edu.cn/apache/tomcat/tomcat-7/v7.0.86/bin/apache-tomcat-7.0.86.tar.gz
[root@192 ~]# tar zxf jdk-7u65-linux-x64.gz -C /usr/src
[root@192 ~]# tar zxf apache-tomcat-7.0.54.tar.gz -C /usr/src
[root@192 ~]# mv jdk1.7.0_65/ /usr/local/java
[root@192 ~]# mv apache-tomcat-7.0.54/ /usr/local/tomcat7
[root@192 ~]# vim /etc/profile
export JAVA_HOME=/usr/local/java export CATALINA_HOME=/usr/local/tomcat7 export PATH=$JAVA_HOME/bin:$CATALINA_HOME/bin:$PATH
[root@192 ~]# source /etc/profile
[root@192 ~]# java -version
java version "1.8.0_171" Java(TM) SE Runtime Environment (build 1.8.0_171-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)
[root@192 ~]# catalina.sh version
Using CATALINA_BASE: /usr/local/tomcat7 Using CATALINA_HOME: /usr/local/tomcat7 Using CATALINA_TMPDIR: /usr/local/tomcat7/temp Using JRE_HOME: /usr/local/java Using CLASSPATH: /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar Server version: Apache Tomcat/7.0. Server built: May 19 2014 10:26:15 Server number: 7.0.86.0 OS Name: Linux OS Version: 3.10.0-327.el7.x86_64 Architecture: amd64 JVM Version: 1.7.0_65-b17 JVM Vendor: Oracle Corporation
启动tomcat
[root@192 ~]# /usr/local/tomcat7/bin/startup.sh
Using CATALINA_BASE: /usr/local/tomcat7 Using CATALINA_HOME: /usr/local/tomcat7 Using CATALINA_TMPDIR: /usr/local/tomcat7/temp Using JRE_HOME: /usr/local/java Using CLASSPATH: /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar Tomcat started.
测试访问
http://192.168.2.6:8080http://192.168.2.7:8080
④两台主机修改tomcat配置文件
[root@192 ~]#cd /usr/local/tomcat7/conf
[root@192 ~]#cp server.xml server.xml.bak
[root@192 ~]#vim server.xml
.......
[root@192 ~]#mkdir -p /web/webapp1
[root@192 ~]#vim /web/webapp1/index.jsp
<%@page language="java" import="java.util.*" pageEncoding="UTF-8"%>tomcat-1 Session serviced by tomcat
| Session ID | <%=session.getId()%> | <% session.setAttribute("abc","abc");%>
| Create on | <%= session.getCreationTime() %> |
重启tomcat
[root@192 ~]#shutdown.sh
[root@192 ~]#startup.sh
注意:第二台主机不同处server.xml中jvmRoute=”tomcat-2”，还有index.jsp中
测试访问看到两台tomcat主机session ID不同，准备工作完成
http://192.168.2.6:8080
http://192.168.2.7:8008
二、session共享配置
步骤：
①两台主机配置会话共享群集
[root@192 ~]#vim /usr/local/tomcat7/conf/server.xml
.......
[root@192 ~]#mkdir /web/webapp1/WEB-INF
[root@192 ~]#cp /usr/local/tomcat7/conf/web.xml WEB-INF/
[root@192 ~]#vim WEB-INF/web.xml
#添加这个单词，必须有这一步，否则用户的session没法使用
如果开启防火墙的话，开启以下
[root@192 ~]#firewall-cmd --add-port=45564/udp --permanent
[root@192 ~]#firewall-cmd --add-port=4000/tcp --permanent
[root@192 ~]#firewall-cmd --reload
重启tomcat
[root@192 ~]#shutdown.sh
[root@192 ~]#startup.sh
注意：两个tomcat配置一样只要在Receiver段指对第二台主机ip地址即可
②配置nginx
[root@192 ~]#vim /usr/local/nginx/conf/nginx.conf
.......
http {
.......
upstream tomcat_server {
server 192.168.2.6:8080 weight=1;
server 192.168.2.7:8080 weight=1;
}
#gzip on;
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
proxy_pass http://tomcat_server;
}启动nginx，访问nginx地址刷新页面测试访问
[root@192 ~]#nginx
http://192.168.2.5
三、连接mysql数据库
步骤：
①192.168.2.8中的mysql容器作为数据库服务器，配置mysql：
mysql>grant all privileges on . to javauser@’192.168.2.%’ identified by ‘123.com’;
mysql> create database javatest
mysql>use javatest
mysql>create table testdata(id int not null auto_increment primary key,foo varchar(25),bar varchar(10));
mysql>insert into testdata(foo,bar) values(‘hello’,’123.com’);
mysql>select * from testdata;
| id | foo | bar |
|---|---|---|
| 1 | hello | 123.com |
②下载mysql-connector-java-5.1.22-bin.jar 复制到tomcat7/lib/目录下(两台tomcat都需要配置)
[root@192 ~]# cp mysql-connector-java-5.1.22-bin.jar /usr/local/tomcat7/lib/
③配置context.xml
[root@192 ~]# cp /usr/local/tomcat7/conf/context.xml /usr/local/tomcat7/conf/context.xml.bak
[root@192 ~]# vim /usr/local/tomcat7/conf/context.xml
WEB-INF/web.xml
④配置web.xml
[root@192 ~]# vim /web/webapp1/web.xml
......MySQL Test App DB Connection jdbc/TestDB javax.sql.DataSource Container
⑤编写连接数据库jsp文件
[root@192 ~]# vim /web/webapp1/test.jsp
<%@ page language="java" import="java.sql.*" pageEncoding="GB2312"%>
MySQL
connect MySQL
<%
String driverClass="com.mysql.jdbc.Driver";
String url="jdbc:mysql://192.168.2.8:3306/javatest";
String username = "javauser";
String password = "123.com";
Class.forName(driverClass);
Connection conn=DriverManager.getConnection(url, username, password);
Statement stmt=conn.createStatement();
ResultSet rs = stmt.executeQuery("select * from testdata");
while(rs.next()){
out.println("
foo:"+rs.getString(2)+"bar:"+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
%>
⑥重启tomcat，测试连接
[root@192 ~]# shutdown.sh
[root@192 ~]# startup.sh
http://192.168.2.5/test.jsp
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