1、安装nginx
- 官网地址：http://nginx.org/en/download.html
- 稳定解压版下载地址：http://nginx.org/download/nginx-1.14.0.zip
- 运行
nginx.exe启动nginx，关闭命令nginx -s stop，重启命令nginx -s reload
2、修改nginx/conf/nginx.conf文件，支持负载均衡
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
#负载均衡模块节点+tomcat服务
upstream test{
server localhost:8080 weight=1;
server localhost:8081 weight=1;
}
server {
listen 80;
server_name localhost;
location / {
#proxy_pass配置为:http:// + upstream名称
proxy_pass http://test;
#添加如下3个配置后，当一台server宕机,切换速度会很快，此时配置是1秒
proxy_connect_timeout 1;
proxy_send_timeout 1;
proxy_read_timeout 1;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
3、tomcat配置
3.1、下载tomcat，解压、复制、重命名为tomcat6-8080、tomcat6-8081两个文件夹。
3.2、修改每个tomcat目录下的server.xml文件
<!-- 端口配置 -->
<!-- 关闭指令端口 -->
<Server port="8005" shutdown="SHUTDOWN">
<Server port="8006" shutdown="SHUTDOWN">
<!--请求处理端口，8080为http请求处理端口，8443位https请求处理端口-->
<Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />
<Connector port="8081" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />
<!--接收AJP协议的处理端口-->
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
<Connector port="8010" protocol="AJP/1.3" redirectPort="8443" />
<!--session复制配置-->
<!--取消Cluster节点的注释-->
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
<!--在Engine节点中增加jvmRoute，多个tomcat保持相同值-->
<Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
4、部署项目
4.1、新建一个javaweb工程，命名为test,包含web.xml和index.jsp即可，部署至两个tomcat中
4.1、web.xml中添加<distributable/>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:javaee="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
id="WebApp_ID" version="2.4">
<distributable/>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
4.2、 index.jsp
<%@ page pageEncoding="UTF-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title>sessionId</title>
</head>
<body>
tomcat-8080 sessionId : <%=session.getId()%>
</body>
</html>
5、测试
多次访问http://localhost/test，结果如下：
tomcat-8080 sessionId : A486C4A2355074B0C56604863C487A7F.jvm1
tomcat-8081 sessionId : A486C4A2355074B0C56604863C487A7F.jvm1
