session共享机制

来源：互联网发布：金字塔期货交易软件编辑：程序博客网时间：2024/06/05 18:47

session共享机制tomcat将缓存信息备份存在memcache中

1.tomcat和nginx的使用

[root@server1 conf]# cd /usr/local/lnmp/nginx/conf/
[root@server1 conf]# /etc/init.d/php-fpm start
Starting php-fpm done
[root@server1 conf]# nginx##开启服务
[root@server1 conf]# vim nginx.conf
[root@server1 conf]# nginx -t
nginx: the configuration file /usr/local/lnmp/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/lnmp/nginx/conf/nginx.conf test is successful
[root@server1 conf]# nginx -s reload

(18)http {        upstream westos{        ip_hash;##开启ip_hash固定一个主机访问的后端服务器        server 172.25.39.2:8080;        server 172.25.39.3:8080;} (90)   location ~ \.jsp$ {                proxy_pass http://westos;   ##所有以.jsp结尾的都转换        }

[root@server1 conf]# cat nginx.conf—–所有没有大规模注释的文件内容如下

用；这里表示注释;user  nobody;worker_processes  2;worker_cpu_affinity 01 10;;error_log  logs/error.log;;error_log  logs/error.log  notice;error_log  logs/error.log  info;;pid        logs/nginx.pid;events {    worker_connections  65535;}http { upstream westos{        ip_hash;        server 172.25.78.2:8080;        server 172.25.78.3:8080;}    include       mime.types;    default_type  application/octet-stream;    sendfile        on;    #tcp_nopush     on;    #keepalive_timeout  0;    keepalive_timeout  65;    #gzip  on;    server {        listen       80;        server_name  localhost;        location / {            root   html;            index  index.php index.html index.htm;        }        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }location ~ \.php$ {    root           html;    fastcgi_pass   127.0.0.1:9000;    fastcgi_index  index.php;  #  fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;    include        fastcgi.conf;}location ~ \.jsp$ {                proxy_pass http://westos;          }    }   server {       listen       443 ssl;       server_name  localhost;       ssl_certificate      cert.pem;       ssl_certificate_key  cert.pem;       ssl_session_cache    shared:SSL:1m;       ssl_session_timeout  5m;       ssl_ciphers  HIGH:!aNULL:!MD5;       ssl_prefer_server_ciphers  on;       location / {           root   html;           index  index.html index.htm;       }   }server {listen 80;server_name www.westos.org;location / {proxy_pass http://westos;}}}

测试页码的编写
[root@server2 ~]# cd /usr/local/tomcat/webapps/ROOT/
[root@server2 ROOT]# vim test.jsp
内容从老吴文档复制

<%@ page contentType="text/html; charset=GBK" %><%@ page import="java.util.*" %><html><head><title>Cluster App Test</title></head><body>Server Info:<%out.println(request.getLocalAddr() + " : " + request.getLocalPort()+"<br>");%><%out.println("<br> ID " + session.getId()+"<br>");String dataName = request.getParameter("dataName");if (dataName != null && dataName.length() > 0) {String dataValue = request.getParameter("dataValue");session.setAttribute(dataName, dataValue);}out.print("<b>Session list</b>");Enumeration e = session.getAttributeNames();while (e.hasMoreElements()) {String name = (String)e.nextElement();String value = session.getAttribute(name).toString();out.println( name + " = " + value+"<br>");Enumeration e = session.getAttributeNames();while (e.hasMoreElements()) {String name = (String)e.nextElement();String value = session.getAttribute(name).toString();out.println( name + " = " + value+"<br>");System.out.println( name + " = " + value);}%><form action="test.jsp" method="POST">name:<input type=text size=20 name="dataName"><br>key:<input type=text size=20 name="dataValue"><br><input type=submit></form></body></html>

scp test.jsp 172.25.39.3:/root/tomcat/webapps/ROOT##给3
中复制相同的页

nginx+tomcat+memcache####共享的实现

1.
get {—from 老吴
asm-3.2.jar
kryo-1.04.jar
kryo-serializers-0.10.jar
memcached-session-manager-1.6.3.jar
memcached-session-manager-tc6-1.6.3.jar
memcached-session-manager-tc7-1.6.3.jar
minlog-1.2.jar
msm-kryo-serializer-1.6.3.jar
reflectasm-1.01.jar
spymemcached-2.7.3.jar }
因为使用的tomcat是7的所以把6的删掉

2.把这些东西放到/usr/local/tomcat/lib

3.打开server2和server3的memc
/etc/init.d/memecached start

vim /usr/local/tomcat/conf/context.xml

<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"memcachedNodes="n1:172.25.39.2:11211,n2:172.25.39.3:11211"failoverNodes="n1"##在server2和server3上分别弄n1和n2如果tomcat1 故障了那么就n1取缓存数据否则就是取自己的缓存---n1就相当于上课讲解的memc2requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"/>

. \ / .
. X .
. / \ .

Tomcat-1 (T1) 将 session 存储在 memcached-2 (T2)上。只有当 M2 不可用时,T1 才将 session 存储在 memcached-1 上(M1 是 T1 failoverNode)。使用这种配置的好处是,当 T1 和 M1 同时崩溃时也不会丢失 session 会话,避免单点故障。

5.打开tomcat服务
/usr/local/tomcat/bin/startup.sh(关闭服务)
/usr/local/tomcat/bin/shutdown.sh

cd /usr/local/tomcat
tail -f logs/catalina.out 试验服务打开是否成功

(INFO: MemcachedSessionService finished initialization, sticky true, operation timeout 1000, with node ids [n1] and failover node ids [n2])证明成功

6.yum install telnet -y两台都做—–telnet作用监控

测试
172.25.78.1/test.jsp
telnet localhost 11211远程监控本地的11211端口监控存储

[root@server3 lib]# telnet localhost 11211Trying ::1...Connected to localhost.Escape character is '^]'.get 48844C8F70F022944863813004730A7E-n2VALUE 48844C8F70F022944863813004730A7E-n2 2048 136W]hB8]h01]h)]h)#48844C8F70F022944863813004730A7E-n2user2456user3789user8888usr1123END

这里写图片描述

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