运维笔记35-web应用实战 (nginx+memcached+tomcat)

叁歲伎倆 2022-10-01 03:53 97阅读 0赞

系统发行版:Red Hat Enterprise Linux Server release 6.5 (Santiago)  
nginx版本:nginx-1.10.3.tar  
memcached版本:memcached-1.4.4-3.el6  
tomcat:apache-tomcat-7.0.37

系统框图:  
![这里写图片描述][SouthEast]

ha1上使用ha2的memcached，只有当ha2不可用的时候才使用ha1上的mecached。

### 一.软件安装与配置 ###

1.java安装

[root@ha2 work-2017.3.25]# sh jdk-6u32-linux-x64.bin 
     [root@ha2 work-2017.3.25]# cp -r jdk1.6.0_32/ /usr/local/java

现在修改一下linux的环境变量

export JAVA_HOME=/usr/local/jdk
    export CLASSPATH=:$JAVA_HOME/lib
    export PATH=$PATH:$JAVA_HOME/bin

2.tomcat安装  
将tomcat解压后直接将其复制到/usr/local下

[root@ha2 work-2017.3.25]# cp -r apache-tomcat-7.0.37 /usr/local/tomcat

memcached的功能是为了缓存session。我们为了添加对tomcat对这些功能的支持我们要给tomcat添加一些库。

添加的库如下:

[root@ha2 jar]# ls
    asm-3.2.jar                              minlog-1.2.jar
    kryo-1.04.jar                            msm-kryo-serializer-1.6.3.jar
    kryo-serializers-0.10.jar                reflectasm-1.01.jar
    memcached-session-manager-1.6.3.jar      spymemcached-2.7.3.jar
    memcached-session-manager-tc7-1.6.3.jar

编辑tomcat的xml配置文件/usr/local/tomcat/conf/context.xml

现在启动tomcat

[root@ha1 bin]# /usr/local/tomcat/bin/startup.sh

关闭tomcat

[root@ha1 bin]# /usr/local/tomcat/bin/shutdown.sh

3.memcache的安装  
这里直接使用yum安装就可以了

[root@ha2 jar]# yum install memcached -y

开启memcached

[root@ha2 jar]# /etc/init.d/memcached start

4.nginx的安装

安装依赖包

[root@ha2 ~]# yum install -y pcre-devel openssl-devel

解压源码包，安装nginx-sticky-module第三方模块，这个模块的功能是让nginx支持sticky模式，一个用户的请求都被发往一台tomcat上。  
将这个模块解压到nginx源码包，方便nginx的源码编译过程。  
configure过程

[root@ha2 nginx-1.10.3]# ./configure --user=nginx --group=nginx --with-http_ssl_module --with-http_stub_status_module --add-module=nginx-goodies-nginx-sticky-module-ng-c78b7dd79d0d/

如果没有问题，直接进入make

[root@ha2 nginx-1.10.3]# make && make install

配置nginx

user nginx nginx;
    worker_processes 4;
    events {
    use epoll;
    worker_connections 1024;
    }
    http {
    upstream www.mo.com {
    sticky;
    server 192.168.5.11:8080;
    server 192.168.5.12:8080;
    }
    include mime.types;
    default_type application/octet-stream;
    sendfile on;
    tcp_nopush on;
    keepalive_timeout 65;
    gzip on;
    server {
    listen 80;
    server_name www.mo.com;
    location / {
    root html;
    index index.html index.htm;
    }
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
    root html;
    }
    location ～ \.jsp$ { #所有 jsp 页面交给 tomcat 处理，动静分离
    proxy_pass http://desktop91.example.com;
    }
    }
    }

将jsp测试页放到如下目录

[root@ha2 conf]# cd /usr/local/tomcat/webapps/ROOT/
    [root@ha2 ROOT]# pwd
    /usr/local/tomcat/webapps/ROOT

test.jsp

<%@ 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>");
    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>

测试一下访问  
![这里写图片描述][SouthEast 1]

看到如上界面就代表我们基本成功了。

[SouthEast]: /images/20220705/b926e2cd23954bf09ca7053c545f3631.png
[SouthEast 1]: /images/20220705/2cdd953dcbc9484a96669d4822217ad1.png