Nginx+Tomcat 集群部署
1.Nginx + Tomcat 集群部署 简单配置
1 #user nobody; 2 worker_processes 4;#工作进程的个数 3 4 #error_log logs/error.log; 5 #error_log logs/error.log notice; 6 #error_log logs/error.log info; 7 8 #pid logs/nginx.pid; 9 10 11 events { 12 worker_connections 1024; #单个进程连接数 13 } 14 15 16 http { 17 include mime.types; 18 default_type application/octet-stream; 19 20 #log_format main '$remote_addr - $remote_user [$time_local] "$request" ' 21 # '$status $body_bytes_sent "$http_referer" ' 22 # '"$http_user_agent" "$http_x_forwarded_for"'; 23 24 #access_log logs/access.log main; 25 26 sendfile on; 27 #tcp_nopush on; 28 29 #keepalive_timeout 0; 30 keepalive_timeout 65; 31 32 #gzip on; 33 #配置反向代理配置 34 gzip on; 35 upstream netitcast.com{ 36 # 定下请求ip_hash; 37 ip_hash; 38 server 127.0.0.1:8181 weight=1;#服务器配置 代理分配 weight:分配权重 down:不参与负载均衡 39 server 192.168.0.105:8181 weight=1;# 40 } 41 42 server { 43 listen 8888; 44 server_name localhost; 45 46 #charset koi8-r; 47 48 #access_log logs/host.access.log main; 49 50 location / { 51 root html; 52 index index.html index.htm; 53 # 配置 54 proxy_pass http://netitcast.com; 55 } 56 57 #error_page 404 /404.html; 58 59 # redirect server error pages to the static page /50x.html 60 # 61 error_page 500 502 503 504 /50x.html; 62 location = /50x.html { 63 root html; 64 } 65 66 # proxy the PHP scripts to Apache listening on 127.0.0.1:80 67 # 68 #location ~ \.php$ { 69 # proxy_pass http://127.0.0.1; 70 #} 71 72 # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000 73 # 74 #location ~ \.php$ { 75 # root html; 76 # fastcgi_pass 127.0.0.1:9000; 77 # fastcgi_index index.php; 78 # fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name; 79 # include fastcgi_params; 80 #} 81 82 # deny access to .htaccess files, if Apache's document root 83 # concurs with nginx's one 84 # 85 #location ~ /\.ht { 86 # deny all; 87 #} 88 } 89 90 91 # another virtual host using mix of IP-, name-, and port-based configuration 92 # 93 #server { 94 # listen 8000; 95 # listen somename:8080; 96 # server_name somename alias another.alias; 97 98 # location / { 99 # root html; 100 # index index.html index.htm; 101 # } 102 #} 103 104 105 # HTTPS server 106 # 107 #server { 108 # listen 443 ssl; 109 # server_name localhost; 110 111 # ssl_certificate cert.pem; 112 # ssl_certificate_key cert.key; 113 114 # ssl_session_cache shared:SSL:1m; 115 # ssl_session_timeout 5m; 116 117 # ssl_ciphers HIGH:!aNULL:!MD5; 118 # ssl_prefer_server_ciphers on; 119 120 # location / { 121 # root html; 122 # index index.html index.htm; 123 # } 124 #} 125 126 }
2.关于Session 的问题
2.1Tomcat 提供了Cluster 的组件实现session 复制 ，Clurster 的配置
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"> <!-- 复制方式： org.apache.catalina.ha.session.DeltaManager：复制所有的session 到所有的节点（节点太多，耗费资源） org.apache.catalina.ha.session.BackupManager： expireSessionsOnShutdown:一个程序被关闭时候，是否要销毁所有session notifyListenersOnReplication:session复制和移动的时候通知 --> <Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true"/> <Channel className="org.apache.catalina.tribes.group.GroupChannel"> <Membership className="org.apache.catalina.tribes.membership.McastService" address="228.0.0.4" port="45564" frequency="500" dropTime="3000"/> <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="auto" port="4002" autoBind="100" selectorTimeout="5000" maxThreads="6"/> <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/> </Sender> <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/> </Channel> <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=""/> <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/> <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/" deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/> </Cluster>
注意:使用Cluster的组件实现Session复制的时候，一定要在程序中web.xml加上这样一句告诉tomcat这个程序是分布式
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>Test</display-name> <!-- 分布式 --> <distributable/> </web-app>
测试Session复制和Nginx集群是否成功页面
1 <%@ page contentType="text/html; charset=GBK" %> 2 <%@ page import="java.util.*" %> 3 <html><head><title>Cluster App Test</title></head> 4 <body> 5 Server Info: 6 <% 7 out.println(request.getLocalAddr() + " : " + request.getLocalPort()+"<br>");%> 8 <% 9 out.println("<br> ID " + session.getId()+"<br>"); 10 // 如果有新的 Session 属性设置 11 String dataName = request.getParameter("dataName"); 12 if (dataName != null && dataName.length() > 0) { 13 String dataValue = request.getParameter("dataValue"); 14 session.setAttribute(dataName, dataValue); 15 } 16 out.println("<b>Session 列表</b><br>"); 17 System.out.println("============================"); 18 Enumeration e = session.getAttributeNames(); 19 while (e.hasMoreElements()) { 20 String name = (String)e.nextElement(); 21 String value = session.getAttribute(name).toString(); 22 out.println( name + " = " + value+"<br>"); 23 System.out.println( name + " = " + value); 24 } 25 %> 26 <form action="index.jsp" method="POST"> 27 名称:<input type=text size=20 name="dataName"> 28 <br> 29 值:<input type=text size=20 name="dataValue"> 30 <br> 31 <input type=submit> 32 </form> 33 </body> 34 </html>
到了这里我有两个疑问没有解决，
1.使用Cluster虽然Session复制成功了，但是在网页上使用iframe 框架时候会出现失效
2.文件上传的问题
