nginx+tomcat8+memcached实现session共享

Posted 2020-10-20

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安装nginx-1.13.8

安装jdk1.8.0_144

安装tomcat-8.5.24

安装memcached-1.4.15

下载tomcat8连接memcached所需jar包

官方参考资料:https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration#decide-which-serialization-strategy-to-use

配置nginx

以下是我的主配置文件，请根据自己情况进行修改

worker_processes 1;

events {

worker_connections 1024;

}

http {

include mime.types;

default_type application/octet-stream;

sendfile on;

keepalive_timeout 65;

upstream tomcat_nginx {

server 192.168.3.58:8080;

server 192.168.3.54:8080;

server 192.168.3.31:8080;

}

server {

listen 80;

server_name localhost;

location / {

proxy_pass http://tomcat_nginx;

}

error_page 500 502 503 504 /50x.html;

location = /50x.html {

root html;

}

配置nginx的启动脚本

#! /bin/bash

# Description: Startup script for webserver on CentOS. cp it in /etc/init.d and

# chkconfig --add nginx && chkconfig nginx on

# then you can use server command control nginx

# chkconfig: 2345 08 99

# description: Starts, stops nginx

set -e

PATH=$PATH:/usr/local/nginx/sbin/

DESC="nginx daemon"

NAME=nginx

DAEMON=/usr/local/nginx/sbin/$NAME

CONFIGFILE=/usr/local/nginx/conf/nginx.conf

#PIDFILE=/var/run/nginx.pid

PIDFILE=/usr/local/nginx/logs/nginx.pid

SCRIPTNAME=/etc/init.d/$NAME

# Gracefully exit if the package has been removed.

test -x $DAEMON || exit 0

d_start() {

$DAEMON -c $CONFIGFILE || echo -n " already running"

}

d_stop() {

kill -QUIT `cat $PIDFILE` || echo -n " not running"

}

d_reload() {

kill -HUP `cat $PIDFILE` || echo -n " can't reload"

}

case "$1" in

start)

echo -n "Starting $DESC: $NAME"

d_start

echo "."

;;

stop)

echo -n "Stopping $DESC: $NAME"

d_stop

echo "."

;;

reload)

echo -n "Reloading $DESC configuration..."

d_reload

echo "reloaded."

;;

restart)

echo -n "Restarting $DESC: $NAME"

d_stop

sleep 1

d_start

echo "."

;;

echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2

exit 3

;;

esac

exit 0

感觉有必要搞个githup账号用来管理配置文件了

启动nginx

编写tomcat的测试页面，一下是两种格式的，都可以用（放在webapps/ROOT/）

<html>

<%= request.getSession().getId() %>

<h1>this is tomcat 1! </h1>

</center>

</body>

</html>

<%@ page contentType="text/html;charset=UTF-8" isELIgnored="false"%>

SessionID:<%=session.getId()%><BR>

SessionIP:<%=request.getServerName()%> <BR>

SessionPort:<%=request.getServerPort()%>

<% out.println("This is Tomcat server 54 !"); %>

启动tomcat

tomcat访问测试

nginx访问测试

tomcat8+memcached实现会话共享

下载jar包

不同版本的tomcat使用的jar包可能会有区别，本测试使用的是tomcat-8.5.24

jar包详细列表及tomcat（注：jedis-2.9.0.jar是连接redis的jar包）

技术分享图片

修改conf/context.xml（每个tomcat）

这里是 non-sticky sessions + kryo，建议参考官方文档：https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration

<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>

<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"

memcachedNodes="n1:192.168.3.31:11211"

sticky="false"

sessionBackupAsync="false"

lockingMode="none"

requestUriIgnorePattern=".*\.(ico|png|gif|jpg|jpeg|css|js)$"

sessionBackupTimeout="1000"

transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"

</Context>

memcachedNodes是指定memcached，可以有多个节点，n1是标签，其他的靠猜

启动memcached，重启tomcat

访问测试

使用redis代替memcached

上面jar包里面jedis-2.9.0.jar就是连接redis的jar包，详情看官方的解释

测试失败(⊙﹏⊙)b

一堆版本不兼容的问题，尝试所有的jar包都用最新的结果不行

报错

技术分享图片

缺少jar包或版本冲突

参考： https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration#decide-which-serialization-strategy-to-use

https://wenku.baidu.com/view/caecc5cf6037ee06eff9aef8941ea76e58fa4abd.html

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