环境
虚拟机：VMware 10
Linux版本：CentOS-6.5-x86_64
客户端：Xshell4
FTP：Xftp4
tomcat7
jdk7
session不一致是指web服务器（tomcat等）出现的问题，所以需要针对web容器进行解决。
网络架构如下：
注意关闭11-13的防火墙：service iptables stop
一、使用内存数据库来缓存session
可以使用memcached或者redis
1、192.168.230.11安装memcached
(1)安装memcached
yum install memcached -y
(2)启动memcached
memcached -d -m 128m -p 11211 -l 192.168.230.11 -u root -P /tmp/
-d:后台启动服务
-m:缓存大小
-p:端口
-l:IP
-u:使用那个用户作为管理用户
-P:服务启动后进程文件存放目录
2、配置nginx
worker_processes ;
events {
worker_connections ;
} http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
access_log logs/access.log main;
sendfile on;
keepalive_timeout ; upstream tom {
server 192.168.230.12:8080;
server 192.168.230.13:8080;
}
server {
listen ;
server_name www.wjy.com;
location / {
root html;
index index.html index.htm;
} location /cat {
proxy_pass http://tom/;
} error_page /50x.html;
location = /50x.html {
root html;
}
}
}
3、192.168.230.12、192.168.230.13配置tomcat
(1)修改tomcat下的context.xml（/usr/local/software/apache-tomcat-7.0.61/conf/context.xml）
在<Context></Context> 里最后面加上下面
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:192.168.230.11:11211"
sticky="false"
lockingMode="auto"
sessionBackupAsync="false"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
sessionBackupTimeout="1000"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory" />
(2)修改index.jsp(/usr/local/apache-tomcat-7.0.61/webapps/ROOT/index.jsp)
192.168.230.12：
from 192.168.230.12
<br/>
SessionId:<%=session.getid()%>
192.168.230.13：
from 192.168.230.13
<br/>
SessionId:<%=session.getid()%>
(3)上传memcached依赖jar(/usr/local/apache-tomcat-7.0.61/lib)
资源链接：
https://download.csdn.net/download/cac2020/10884650
二、tomcat所在集群节点时间必须一致
使用date "+%Y-%m-%d %H:%M:%S"来检查，时间相差很大仍然新生成session
[root@node1 sbin]# date "+%Y-%m-%d %H:%M:%S"
-- ::
[root@node1 sbin]# date -s "2018-12-28 16:49:00"
Fri Dec :: CST
[root@node1 sbin]# date "+%Y-%m-%d %H:%M:%S"
-- ::
验证：
参考：
memcached:
https://blog.csdn.net/qq_24829007/article/details/79393543
https://www.cnblogs.com/interdrp/p/4096466.html
https://blog.csdn.net/a857553315/article/details/80384365
redis:
https://blog.csdn.net/lajigao/article/details/79645057
https://blog.csdn.net/Jack__iT/article/details/80640941
https://github.com/jcoleman/tomcat-redis-session-manager