nginx+redis实现负载均衡和session共享

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负载均衡 session共享

nginx+redis实现session共享和负载均衡

最近想实现一个通过nginx做负载，然后共享session的东西
需要到的资源
nginx-1.13.4
apache-tomcat-7.0.63
commons-pool2-2.3.jar
commons-pool-1.2.jar
jedis-2.1.0.jar
tomcat-juli-8.0.23.jar
tomcat-redis-session-manager-1.2-tomcat-7.jar

首先是nginx的配置

upstream cluster_redis {    
        server localhost:8280 max_fails=1 fail_timeout=60s;    
        server localhost:8380 max_fails=1 fail_timeout=60s;    

    }    
    server { 
       listen 8180;    
       server_name localhost;    
       location / {    
        proxy_pass http://cluster_redis;
		proxy_set_header Host $host:$server_port;
		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header X-Forwarded-Scheme $scheme;
		proxy_connect_timeout 10;
		proxy_read_timeout 10;
		proxy_send_timeout 10;
       }    
    }

刚开始nginx一直报80端口冲突，按照网上的方法，怎么试怎么不行，最后放弃了，把80端口改成其他的了，我改成了8080，就能启动nginx了

再者是tomcat的配置

<Valve className="com.radiadesign.catalina.session.RedisSessionHandlerValve" />    
	<Manager className="com.radiadesign.catalina.session.RedisSessionManager"    
             host="127.0.0.1"    
             port="6379"    
             database="0"    
			 password="123456"
             maxInactiveInterval="60" />

然后把上面的jar包放进tomcat的lib文件夹下，这里的redis配置和redis的搭建这里就详写了，这个很简单的，下个redis的安装包，安装就行。

然后在tomcat里面的ROOT底下新建一个index.jsp

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

<%    
    String sessionId=session.getId(); //获取session ID号
    String userName=request.getParameter("userName");
	String password=request.getParameter("password");
	String logout=request.getParameter("logout");
	
    if(userName!=null&&!"".equalsIgnoreCase(userName.trim())){
		System.out.println("userName:"+userName);
        session.setAttribute("userName", userName);
    }
	
	if(logout!=null){
		session.setAttribute("userName", "");
		System.out.println("logout....");
	}
	System.out.println("tomcat 1");
	out.println("tomcat 1");
%>
<!DOCTYPE html>  
<html>  
<head>  
<title>test</title>  
<script src="jquery-1.8.3.min.js"></script>
<script>
function logout11(){
	$.ajax({
		type:"POST",
		url:"index.jsp",
		dataType:"json",
		data:{logout:"logout"},
		success:function(result) {
			location.href="index.jsp";
		},
		error:function(result){
			
		}
	});
}

function login(){
	var userName=$("#userName").val();
	
	$.ajax({
		type:"POST",
		url:"index.jsp",
		dataType:"json",
		data:{userName:userName},
		success:function(result) {
			alert(1111);
			location.href="index.jsp";
		},
		error:function(result){
			
		}
	});
}
</script>
</head>
<body>  
<div>
current sessionID:<%=sessionId %>
</div>
<%if(session.getAttribute("userName")!=null&&!"".equals((String)session.getAttribute("userName"))){%>
<div>
userName:<%=(String)session.getAttribute("userName")%>
<p>
<form action="index.jsp" method="post">
	<input name="logout" type="hidden">
	<input type="button" value="logout" onclick="logout11()"> 
</form>
</p>
</div>
<%}else {%>
<div>
	<form action="index.jsp" method="post">
		<table>
			<tr>
				<td>userName:</td>
				<td><input id="userName" name="userName" type="text" /></td>
			</tr>
			<tr>
				<td>password:</td>
				<td><input name="password" type="text" /></td>
			</tr>
		</table>
		<p>
			<input type="button" value="login" onclick="login()"> 
		</p>
	</form>
</div>
<%}%>
</body>  
</html>

jquery js自己下载替换。
然后，复制tomcat，改端口，此时我的两个tomcat的端口分别是8280,8380
好了，启动nginx和两个tomcat，访问http://localhost:8180/index.jsp