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研究了下nginx+tomcat+memcached 的配置,练习了下脚本的书写,参考了好几篇文章,在此记录一下,有不对的地方敬请指正。

系统环境:
RHEL6.5 x64
iptables -F & selinux is disabled

主机角色:
node1 :192.168.122.101 :nginx tomcat memcached
node2 :192.168.122.102 :tomcat memcached

https://code.google.com/memcached-session-manager
memcached的session管理

nginx做反向代理两台tomcat,用memcached同步session,防止数据丢失

Tomcat1将session存储在memcacted2上.tomcat和Memcached使用交叉存储,只有当M2不可用时T1才将数据存储在M1上(M1是T1的failoverNode),使用这种方式可以避免单点故障.从而实现应用的高可用性.

注意:两台node上的tomcat应完全一致

1.在两台node主机上配置tomcat环境

<code><span>#./jdk-6u32-linux-x64.bin</span><span># mv jdk1.6.0_32/ /usr/local/lnmp/jdk</span><span>#vim /etc/profile              编写环境变量</span>export JAVA_HOME=/usr/local/lnmp/jdk

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

export PATH=$PATH:$JAVA_HOME/bin

<span>#source /etc/profile</span>测试java能否正常工作
<span>#vim test.java</span><span>public</span><span><span>class</span><span>test</span>{</span><span>public</span><span>static</span><span>void</span> main(String[] args)

{System.out.println(<span>"Hello!"</span>);  }

}

<span>#javac test.java          编译</span><span>#java test               执行后出现Hello!说明java环境配置好</span></code>

安装tomcat服务器

<code><span>#tar zxf apache-tomcat-7.0.37.tar.gz      解压就能用,不需要编译</span><span>#mv apache-tomcat-7.0.37 tomcat</span><span>#/TOMCAT_ROOT_DIR/tomcat/webapps/ROOT                tomcat的默认发布目录</span><span>#/TOMCAT_ROOT_DIR/tomcat/bin/startup.sh(shutdown.sh)    tomcat默认的启动和关闭脚本</span></code>

tomcat默认开启8080端口,

测试http://192.168.122.101:8080 访问到tomcat默认的测试页

<code><span>#cd tomcat/webapps/ROOT</span><span>#cat test.jsp           #测试页</span><span>this</span> time is: new java.util.Date()%></code>

测试访问;http://192.168.122.101:8080 显示当前时间

tomcat访问8080端口,使用nginx反向代理。

使用nginx发布jsp动态网页:

nginx配置文件:

cat /usr/local/nginx/conf/nginx.conf

<code><span>#user  nginx nginx;</span>
worker_processes  <span>4</span>;

<span>#error_log  logs/error.log;</span><span>#error_log  logs/error.log  notice;</span><span>#error_log  logs/error.log  info;</span><span>#pid        logs/nginx.pid;</span>events {
    use epoll;
    worker_connections  <span>1024</span>;
}


http {
    upstream tomcat {  <span>#两台tomcat负载均衡</span>
    sticky;               <span>#session同步,为nginx的模块</span><span>server</span><span>192.168</span><span>.0</span><span>.1</span>:<span>8080</span>;
        <span>server</span><span>192.168</span><span>.0</span><span>.2</span>:<span>8080</span>;
    }

    include       mime.types;
    default_type  application/octet-stream;

    <span>#log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '</span><span>#                  '$status $body_bytes_sent "$http_referer" '</span><span>#access_log  logs/access.log  main;</span>    sendfile        on;
    <span>#tcp_nopush     on;</span><span>#keepalive_timeout  0;</span>
    keepalive_timeout  <span>65</span>;

    <span>#gzip  on;</span><span>server</span> {
        listen       <span>80</span>;
        server_name  localhost;

        <span>#charset koi8-r;</span><span>#access_log  logs/host.access.log  main;</span>        location / {
            root   html;
            proxy_pass   http:<span>//tomcat;</span><span>index</span><span>index</span>.html <span>index</span>.htm;
        }

        <span>#error_page  404              /404.html;</span><span># redirect server error pages to the static page /50x.html</span>
        error_page   <span>500</span><span>502</span><span>503</span><span>504</span>  /<span>50</span>x.html;
        location = /<span>50</span>x.html {
            root   html;
        }

        location ~ \.jsp$ {
            proxy_pass   http:<span>//tomcat;</span>
        }
}

nginx -t && nginx -s reload</code>

访问:http://192.168.122.101/test.jsp 测试

同步两台tomcat的内容,并且修改java环境变量/etc/profile

测试:http://192.168.122.102:8080/test.jsp

两台node(tomcat)准备好了

2、在node1上的nginx环境中发布网页

使用nginx的负载均衡功能,

体现在nginx.conf中:

<code><span>upstream</span> tomcat-lb {

  <span>server</span><span>192.168.122.101:8080</span>;

  <span>server</span><span>192.168.122.102:8080</span>;

}

<span>location</span><span>~ \.jsp$</span> {

  <span>proxy_pass</span><span>http://tomcat-lb</span>;

}

<span>nginx</span> -t && nginx -s reload</code>

测试:http://192.168.122.101/test.jsp
实现两台主机的负载均衡(访问nginx所在的node)

问题:在后台实现了nginx的负载均衡,但是当一个用户刷新数据时,数据总是变化的,试想,在动态页面,如果用户提交数据刷新后并没有提交到服务器上,并且必须要重新填写表格,这样会造成糟糕的用户体验。

解决:给nginx增加一个sticky模块.(需要重新编译nginx)

重新在nginx在进行模块化编译:

nginx-sticky-modules.tar.gz(解压就行)

<code><span>#tar zxf nginx-sticky-modules.tar.gz -C /root/nginx-1.4.2</span><span>#cd nginx-1.4.2/</span><span>#make clean</span><span>#./configure --prefix=/usr/local/nginx --add-module=$NGINX_PKG_DIR/$DIR/nginx-sticky-module-1.0 --with-http_ssl_module --with-http_stub_status_module</span><span>#make && make install</span><span>#vim nginx.conf</span>upstream linux {
  sticky;   #装了nginx-sticky后的功能
  server <span>192.168</span><span>.122</span><span>.101</span>:<span>8080</span> ;
  server <span>192.168</span><span>.122</span><span>.102</span>:<span>8080</span> ;
}</code>

测试:http://192.168.122.101/test.jsp 后发现刷新不会来回负载(每个用户看到的其实不是一个tomcat上的数据,但是对用户是透明的)

3.nginx负载tomcat的jsp时,需要解决session共享:

使用memcache进行缓存(用户)后端数据,但是又要想到解决单点故障问题,因而可以采用两台memcache作为后端负载.

memcached默认端口11211,后端使用交叉存储(tomcat会将session同步,session自动寻找存储的memcached,但是默认是交叉存储,当一个memcached服务器坏掉,tomcat都会存到存活的memcached服务器上)

只要tomcat不宕掉,一切数据都还存在

但是当memcached宕掉,tomcat会向存活的memcached上存取

session 的序列化方案官方推荐的有 4 种:

  1. java serialization

  2. msm-kryo-serializer

  3. msm-javolution-serializer

  4. msm-xstream-serializer

其中性能最好的是Kryo,我们使用kryo来做

mecached服务器node1 and node2

<code><span>#yum install memcached -y</span><span>#/etc/init.d/memcached start</span></code>

memcached默认开启11211端口

测试访问:telnet localhost 11211

stats 查看状态
set user 0 0 3 存储新值(add replace)
get user 获取值

配置两台memcached服务器(tomcat),下载jar包(必须支持相关的java程序)
提供测试环境的包,解压即可用:
链接: http://pan.baidu.com/s/1mgIF9NU 密码: n5wu

asm-3.2.jar
couchbase-client-1.2.2.jar
kryo-1.03.jar
kryo-serializers-0.11.jar
memcached-session-manager-1.6.5.jar
memcached-session-manager-tc7-1.6.5.jar
minlog-1.2.jar
msm-kryo-serializer-1.6.5.jar
reflectasm-0.9.jar
spymemcached-2.10.3.jar

node1 and node2 同步内容

<code><span>#cd tomcat/lib/</span><span>#mget jar/*    下载tomcat的session共享管理包</span><span>#cd tomcat/conf/</span><span># vim context.xml</span><manager classname="<span">"de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes=<span>"n1:192.168.122.101:11211,n2:192.168.122.102:11211"</span>
failoverNodes=<span>"n1"</span>    #tomcat2需要写成n2
requestUriIgnorePattern=<span>".*\.(ico|png|gif|jpg|css|js)$"</span> transcoderFactoryClass=<span>"de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"</span>
/>


<span>#tomcat/bin/shutdown.sh #重启tomcat,以识别memcached-session-manager</span><span># tail -f logs/catalina.out    #默认日志</span>INFO: MemcachedSessionService finished initialization, sticky <span>true</span>, operation timeout <span>1000</span>, with node ids [n2] and failover node ids [n1]</manager></code>

正常启动

编辑测试文件:(提交用户信息的jsp测试页)

<code># vim tomcat/webapps/ROOT/test.jsp             

<span>"text/html; charset=GBK"</span> %><span>"java.util.*"</span> %><span>html</span>><span>head</span>><span>title</span>>Cluster App Test<span><span>title</span>></span><span><span>head</span>></span><span>body</span>>Server Info:

<span>request</span>.getLocalAddr() + <span>" : "</span> + <span>request</span>.getLocalPort()+<span>"<br>"</span>);%><span>"<br> ID "</span> + session.getId()+<span>"<br>"</span>);

<span>String</span> dataName = <span>request</span>.getParameter(<span>"dataName"</span>);

<span>if</span> (dataName != <span>null</span> && dataName.length() > <span>0</span>) {

<span>String</span> dataValue = <span>request</span>.getParameter(<span>"dataValue"</span>);

session.setAttribute(dataName, dataValue);

}

out.print(<span>"<b>Session list</b>"</span>);

Enumeration e = session.getAttributeNames();

<span>while</span> (e.hasMoreElements()) {

<span>String</span> name = (<span>String</span>)e.nextElement();

<span>String</span> value = session.getAttribute(name).toString();

out.println( name + <span>" = "</span> + value+<span>"<br>"</span>);

System.out.println( name + <span>" = "</span> + value);

}

%><span>form</span><span>action</span>=<span>"test.jsp"</span><span>method</span>=<span>"POST"</span>>name:<span>input</span><span>type</span>=<span>text</span><span>size</span>=<span>20</span><span>name</span>=<span>"dataName"</span>><span>br</span>>key:<span>input</span><span>type</span>=<span>text</span><span>size</span>=<span>20</span><span>name</span>=<span>"dataValue"</span>><span>br</span>><span>input</span><span>type</span>=<span>submit</span>><span><span>form</span>></span><span><span>body</span>></span><span><span>html</span>></span></code>

session共享完成:两台tomcat和memcached做相同的配置(jdk,memcache,tomcat)

测试:

http://192.168.122.101/test.jsp
使用一台tomcat和另外一台的memcached进行session共享

任何一台tomcat或者memcached挂了都无所谓

session会记录并且保持用户的数据信息

我同时写了一键安装的脚本,还有一些问题,也分享出来,希望有大神能指点~~

第一个,在有nginx的机器上运行:

<code><span>#!/bin/bash
</span>
setenforce <span>0</span> > /dev/null
iptables -F > /dev/null
sed -i <span>'s/^SELINUX=enforcing/SELINUX=disabled/g'</span> /etc/selinux/config

<span>###############  nginx + tomcat + memcached</span>DIR_NOW=`<span>pwd</span>`

IPADDR_NTM=<span>'192.168.122.101'</span>
IPADDR_TM=<span>'192.168.122.102'</span>NGINX_PKG_DIR=<span>'/root/one_key_install'</span>
NGINX_PKG_NAME=<span>'nginx-1.6.1.tar.gz'</span>
NGINX_DIR=<span>'/usr/local/nginx'</span>TOMCAT_PKG_DIR=<span>'/root/one_key_install'</span>
TOMCAT_PKG_NAME=<span>'apache-tomcat-7.0.37.tar.gz'</span>
TOMCAT_DIR=<span>'/usr/local/tomcat'</span>STICKY_PKG_DIR=<span>'/root/one_key_install'</span>
STICKY_PKG_NAME=<span>'nginx-sticky-module-1.0.tar.gz'</span>JDK_BIN_DIR=<span>'/root/one_key_install'</span>
JDK_BIN_NAME=<span>'jdk-6u32-linux-x64.bin'</span><span>###################  nginx + sticky install</span><span>cd</span><span>$NGINX_PKG_DIR</span>
tar zxf <span>$NGINX_PKG_NAME</span>
DIR=`ls -F | grep /$ | grep nginx | awk -F <span>'/'</span><span>'{print $1}'</span>`
tar zxf <span>$STICKY_PKG_DIR</span>/<span>$STICKY_PKG_NAME</span> -C <span>$NGINX_PKG_DIR</span>/<span>$DIR</span>sed -i <span>'s/^CFLAGS="$CFLAGS -g"/#CFLAGS="$CFLAGS -g"/g'</span> /<span>$NGINX_PKG_DIR</span>/<span>$DIR</span>/auto/cc/gcc
sed -i <span>'s/^#define NGINX_VER          \"nginx\/\" NGINX_VERSION/#define NGINX_VER          \"nginx\/\"/g'</span> /<span>$NGINX_PKG_DIR</span>/<span>$DIR</span>/src/core/nginx.h

yum install gcc pcre-devel openssl-devel -y

<span>cd</span><span>$NGINX_PKG_DIR</span>/<span>$DIR</span>
./configure --prefix=/usr/local/nginx --add-module=<span>$NGINX_PKG_DIR</span>/<span>$DIR</span>/nginx-sticky-module-<span>1.0</span> --with-http_ssl_module --with-http_stub_status_module
make && make install

ln <span>-s</span> /usr/local/nginx/sbin/nginx /usr/local/sbin/
useradd -M <span>-d</span> /usr/local/nginx/ <span>-s</span> /sbin/nologin nginx

<span>cd</span><span>$DIR_NOW</span>
rm <span>-f</span> /usr/local/nginx/conf/nginx.conf
cp nginx.conf.exp /usr/local/nginx/conf/nginx.conf
sed -i <span>"s/server 192.168.0.1:8080;/server <span>${IPADDR_NTM}</span>:8080;/g"</span> /usr/local/nginx/conf/nginx.conf
sed -i <span>"s/server 192.168.0.2:8080;/server <span>${IPADDR_TM}</span>:8080;/g"</span> /usr/local/nginx/conf/nginx.conf

<span>#####################  tomcat install</span><span>cd</span><span>$JDK_BIN_DIR</span>
sh <span>$JDK_BIN_NAME</span>
DIR=`ls -F | grep /$ | grep jdk | awk -F <span>'/'</span><span>'{print $1}'</span>`
mv <span>$DIR</span> /usr/local/
mv /usr/local/<span>$DIR</span> /usr/local/jdk
<span>echo</span><span>"export JAVA_HOME=/usr/local/jdk
export CLASSPATH=:\$JAVA_HOME/lib
export PATH=\$PATH:\$JAVA_HOME/bin
"</span>>>/etc/profile

<span>cd</span><span>$TOMCAT_PKG_DIR</span>
tar zxf <span>$TOMCAT_PKG_NAME</span> -C /usr/local
<span>cd</span> /usr/local
mv /usr/local/`ls | grep tomcat` /usr/local/tomcat
ln <span>-s</span> /usr/local/tomcat/bin/startup.sh /usr/local/sbin/tomcat-start
ln <span>-s</span> /usr/local/tomcat/bin/shutdown.sh /usr/local/sbin/tomcat-stop

<span>cd</span><span>$DIR_NOW</span>
tar zxf kryo_pkgs.tar.gz
<span>cd</span> kryo_pkgs
cp * /usr/local/tomcat/lib

<span>cd</span><span>$DIR_NOW</span>
rm <span>-f</span> /usr/local/tomcat/conf/context.xml
cp context.xml.exp /usr/local/tomcat/conf/context.xml
 <span>cd</span><span>$DIR_NOW</span>
rm <span>-f</span> /usr/local/tomcat/conf/context.xml
cp context.xml.exp /usr/local/tomcat/conf/context.xml
sed -i <span>"s#memcachedNodes=\"n1:192.168.0.1:11211,n2:192.168.0.2:11211\"#memcachedNodes=\"n1:<span>${IPADDR_NTM}</span>:11211,n2:<span>${IPADDR_TM}</span>:11211\"#"</span> /usr/local/tomcat/conf/context.xml

<span>####################  memcached install</span>yum install memcached -y

<span>####################  start services</span>
/etc/init.d/memcached start
<span>source</span> /etc/profile
tomcat-start
nginx</code>

第二个,在只有tomcat和memcached的机器上运行

<code><span>#!/bin/bash
</span>
setenforce <span>0</span> > /dev/null
iptables -F > /dev/null
sed -i <span>'s/^SELINUX=enforcing/SELINUX=disabled/g'</span> /etc/selinux/config

DIR_NOW=`<span>pwd</span>`

IPADDR_NTM=<span>'192.168.122.101'</span>
IPADDR_TM=<span>'192.168.122.102'</span>TOMCAT_PKG_DIR=<span>'/root/no_ngx'</span>
TOMCAT_PKG_NAME=<span>'apache-tomcat-7.0.37.tar.gz'</span>
TOMCAT_DIR=<span>'/usr/local/tomcat'</span>STICKY_PKG_DIR=<span>'/root/no_ngx'</span>
STICKY_PKG_NAME=<span>'nginx-sticky-module-1.0.tar.gz'</span>JDK_BIN_DIR=<span>'/root/no_ngx'</span>
JDK_BIN_NAME=<span>'jdk-6u32-linux-x64.bin'</span><span>cd</span><span>$JDK_BIN_DIR</span>
sh <span>$JDK_BIN_NAME</span>DIR=`ls -F | grep /$ | grep jdk | awk -F <span>'/'</span><span>'{print $1}'</span>`
mv <span>$DIR</span> /usr/local/
mv /usr/local/<span>$DIR</span> /usr/local/jdk
<span>echo</span><span>"export JAVA_HOME=/usr/local/jdk
export CLASSPATH=:\$JAVA_HOME/lib
export PATH=\$PATH:\$JAVA_HOME/bin
"</span>>>/etc/profile

<span>cd</span><span>$TOMCAT_PKG_DIR</span>
tar zxf <span>$TOMCAT_PKG_NAME</span> -C /usr/local/
<span>cd</span> /usr/local
mv /usr/local/`ls | grep tomcat` /usr/local/tomcat


<span>cd</span><span>$DIR_NOW</span>
tar zxf kryo_pkgs.tar.gz
<span>cd</span> kryo_pkgs
cp * /usr/local/tomcat/lib

<span>cd</span><span>$DIR_NOW</span>
rm <span>-f</span> /usr/local/tomcat/conf/context.xml
cp context.xml.exp /usr/local/tomcat/conf/
mv /usr/local/tomcat/conf/context.xml.exp /usr/local/tomcat/conf/context.xml
sed -i <span>"s#memcachedNodes=\"n1:192.168.0.1:11211,n2:192.168.0.2:11211\"#memcachedNodes=\"n1:<span>${IPADDR_NTM}</span>:11211,n2:<span>${IPADDR_TM}</span>:11211\"#"</span> /usr/local/tomcat/conf/context.xml
sed -i <span>'s/failoverNodes="n1"/failoverNodes="n2"/'</span> /usr/local/tomcat/conf/context.xml

yum install memcached -y

/etc/init.d/memcached start

<span>source</span> /etc/profile
ln <span>-s</span> /usr/local/tomcat/bin/startup.sh /usr/local/sbin/tomcat-start
ln <span>-s</span> /usr/local/tomcat/bin/shutdown.sh /usr/local/sbin/tomcat-stop

tomcat-start</code>

这两个脚本存在同样的问题,执行完毕之后发现

<code><span>source</span> /etc/profile</code>

这一句没有执行,必须手动执行,一直百思不得其解,希望有谁能解答,多谢啦~~

以上就介绍了nginx+tomcat+memcached配置+脚本,包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

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PHP的核心优势包括易于学习、强大的web开发支持、丰富的库和框架、高性能和可扩展性、跨平台兼容性以及成本效益高。1)易于学习和使用,适合初学者;2)与web服务器集成好,支持多种数据库;3)拥有如Laravel等强大框架;4)通过优化可实现高性能;5)支持多种操作系统;6)开源,降低开发成本。

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