session共享机制（nginx+tomcat+memcached）

Posted 2020-09-29

一、配置jdk环境java的编译环境------server2和server3同时配置

 

jdk是JAVA的开发编译环境是java语言的软件开发工具包主要用于移动设备的嵌入式设备上的java应用程序

 

jdk的安装基础过程

1将jdk的包解压在指定路径 使用-C来指定路径

2进入指定的路径给jdk解压后的目录做个软连接

3编辑系统的环境变量使得java命令可以使用更改后让文件生效让环境变量文件即时生效使用source命令

4编辑java测试文件编译执行

 

1. get jdk-7u79-linux-x64.tar.gz -C /usr/local/(from 老吴)

tar zxf jdk-7u79-linux-x64.tar.gz -C /usr/local/

 

 

2. ln -s /usr/local/jdk1.7.0_79/ /usr/local/java##软链接方便版本升级

 

 

3. vim /etc/profile##编辑系统的环境变量全局变量所有用户都可以用而~/.bash_profile是局部变量只针对某些用户加载才可以使用

 

在配置文件末端加上

export JAVA_HOME=/usr/local/java

export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

export PATH=$PATH:$JAVA_HOME/bin

 

4. source /etc/profile##让更改在当前位置生效

 

查看是否生效

[[email protected] local]# echo $PATH

/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/java/bin

[[email protected] local]# echo $CLASSPATH

.:/usr/local/java/lib:/usr/local/java/jre/lib

 

5.写java证明环境配置是ok的

[[email protected] ~]# vim test.java

 

public class test {

 

        public static void main(String[] arge) {

                System.out.println("Hello World!");

        }

}

 

[[email protected] ~]# javac test.java

[[email protected] ~]# java test

Hello World!

 

 

 

二、安装tomcatjsp页面的解释------server2和server3同时配置

 

Tomcat服务器是一个免费的开放源代码的web应用服务器其属于轻量级应用服务器很适合开发和调试jsp程序

Tomcat是 Apache服务器的扩展但运行时它是独立运行的所以当tomcat运行时它实际上作为一个与Apache独立的进程单独运行的

 

Tomcat 的安装很简单其基本步骤如下

1从官网 down 一个安装包  例如apache-tomcat-7.0.37.tar.gz

2解压 也可以在解压的时候加上你要解压到的目录等参数

3进入tomcat的bin目录开启服务就好

4测试可以编写一个测试页

 

 

1.get apache-tomcat-7.0.37.tar.gz(from 老吴)

   tar zxf apache-tomcat-7.0.37.tar.gz -C /usr/local/

 

 

2. ln -s /usr/local/apache-tomcat-7.0.37/ /usr/local/tomcat

 

 

3. cd /usr/local/tomcat/bin/   

   ./startup.sh##开启tomcat服务

 

4. netstat -antlp   #此时8080端口打开

 

tcp        0      0 :::8080                     :::*                        LISTEN      1122/java

 

 

5.cd /usr/local/tomcat/webapps/ROOT

   vim test.jsp

 

the time is: <%=new java.util.Date() %>

 

 

在server3中

     tar zxf apache-tomcat-7.0.37.tar.gz -C /usr/local/

     ln -s /usr/local/apache-tomcat-7.0.37/ /usr/local/tomcat

     cd tomcat/bin/

     ./startup.sh

     netstat -antlp

 

测试在网页搜索 172.25.78.2:8080/test.jsp

 

 

 

 

三、session共享机制tomcat将缓存信息备份存在memcache中

 

1.tomcat和nginx的使用

 

[[email protected] conf]# cd /usr/local/lnmp/nginx/conf/

[[email protected] conf]# /etc/init.d/php-fpm start

Starting php-fpm  done

[[email protected] conf]# nginx##开启服务

[[email protected] conf]# vim nginx.conf

[[email protected] 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

[[email protected] 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

 

        }

[[email protected] conf]# cat nginx.conf-----所有没有大规模注释的文件内容如下

 

#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

[[email protected] ~]# cd /usr/local/tomcat/webapps/ROOT/

[[email protected] 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

 

4. 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memc2

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

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

/>

 

<T1><T2>

. \ / .

.  X  .

. / \ .

<M1><M2>

 

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

 

[[email protected] lib]# telnet localhost 11211

Trying ::1...

Connected to localhost.

Escape character is ‘^]‘.

get 48844C8F70F022944863813004730A7E-n2

VALUE 48844C8F70F022944863813004730A7E-n2 2048 136

W]hB8]h01]h)]h)#48844C8F70F022944863813004730A7E-n2user2456user3789user8888usr1123

END

 

 

 

 

 

集群-----------------保证时间同步

 

ricci是集群的管理工具

一个客户端两个集群节点

 

 

*********保证两个server纯净***********

 

1.先重新配置yum把这些全部配置才能满足集群的需要

 

yum里面的文件

[HighAvailability]高可用

name=HighAvailability

baseurl=http://172.25.39.250/rhel6.5/HighAvailability

gppcheck=0

 

[LoadBalancer]负载均衡

name=LoadBalancer

baseurl=http://172.25.39.250/rhel6.5/LoadBalancer

gpgcheck=0

 

[ResilientStorage]存储

name=ResilientStorage

baseurl=http://172.25.39.250/rhel6.5/ResilientStorage

gpgcheck=0

 

[ScalableFileSystem]大文件系统支持

name=ScalableFileSystem

baseurl=http://172.25.39.250/rhel6.5/ScalableFileSystem

gpgcheck=0

 

 yum repolist##更新yum

*****************************************************   

*repo id            repo name                 status

*HighAvailability   HighAvailability             56

*LoadBalancer       LoadBalancer                  4

*ResilientStorage   ResilientStorage             62

*ScalableFileSystem ScalableFileSystem            7

*rhel6.5            Red Hat Enterprise Linux  3,690

*repolist: 3,819

*****************************************************

 

2.安装 yum install -y ricci

   passwd ricci在企业六里面必须要给密码

 

3. /etc/init.d/ricci start##开启服务

    chkconfig ricci on##开机自启动

 

4.[[email protected] ~]# clustat##查看集群的状态

Cluster Status for hahaha  @ Sat Jul 22 17:02:21 2017

Member Status: Quorate

 

 Member Name              ID   Status

 ------ ----              ---- ------

 server1                      1 Online

 server4                      2 Online, Local

 

 

5.相同配置server1

 

 a.vim /etc/yum.repos.d/rhel-source.repo

   yum repolist

 

 b. yum install -y ricci

    passwd ricci

   /etc/init.d/ricci start

   chkconfig ricci on

 c. yum install -y luci##图形操作界面-------测试的那个服务器安装就行(会发现全是用python写的)

   /etc/init.d/luci start

    chkconfig luci on##开机自启动

 d. clustat

 

 

在浏览器

https://172.25.39.1:8084----在哪个主机安装了luci用哪个主机测试

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