Nginx负载调度器+双Tomcat负载及会话共享+MySQL后端数据库
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互联网集市收集整理的这篇技术教程文章主要介绍了Nginx负载调度器+双Tomcat负载及会话共享+MySQL后端数据库，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含9786字，纯文字阅读大概需要14分钟。
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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://192.168.2.6:8080
http://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
.......
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat-1">
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Context docBase="/web/webapp1" path="" reloadable="true"/>[root@192 ~]#mkdir -p /web/webapp1
[root@192 ~]#vim /web/webapp1/index.jsp
<%@page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>tomcat-1</title>
</head>
<body>
<h1><font color="red">Session serviced by tomcat</font></h1>
<table aligh="center" border="1">
<tr>
<td>Session ID</td>
<td><%=session.getId()%></td>
<% session.setAttribute("abc","abc");%>
</tr>
<tr>
<td>Create on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>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<title>tomcat-2</title>
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
.......
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat-1">
<!--For clustering, please take a look at documentation at:
/docs/cluster-howto.html (simple how to)
/docs/config/cluster.html (reference documentation) -->
<!--
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
-->
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="8">
<Manager className="org.apache.catalina.ha.session.DeltaManager"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>
<Channel className="org.apache.catal
ina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService"
address="228.0.0.4"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="192.168.2.5"
port="4000"
autoBind="100"
selectorTimeout="5000"
maxThreads="6"/>
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
filter=""/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer"
temDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>
<ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>
<!-- Use the LockOutRealm to prevent attempts to guess user passwords
via a brute-force attack -->
<Realm className="org.apache.catalina.realm.LockOutRealm">
<!-- This Realm uses the UserDatabase configured in the global JNDI
resources under the key "UserDatabase". Any edits
that are performed against this UserDatabase are immediately
available for use by the Realm. -->
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Context docBase="/web/webapp1" path="" reloadable="true"/>[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
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<distributable/> #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
<Context>
<!-- Default set of monitored resources -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="javauser" password="123.com" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://192.168.2.8:3306/javatest"/>④配置web.xml
[root@192 ~]# vim /web/webapp1/web.xml
......
<distributable/>
<description>MySQL Test App</description>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/TestDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>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"%>
<html>
<head>
<title>MySQL</title>
</head>
<body>
connect MySQL<br>
<%
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("<br>foo:"+rs.getString(2)+"bar:"+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
%>
</body></html>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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