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Terracotta+Tomcat+nginx实现session的共享
环境准备:(Nginx,tomcat的安装部署本例不赘述。)
192.168.1.13 nginx
192.168.1.225 tomcat7,terracotta
192.168.1.226 tomcat7
部署terracotta+tomcat集群:
一:安装java程序至系统,配置java环境。
# vi /etc/profile export JAVA_HOME=/usr/local/java export PATH=/usr/local/java/bin:$PATH
二:部署单terracotta服务。
下载terracotta:http://www.terracotta.org/downloads
本例使用terracotta3.7.7版本,每个版本的部署配置略有不同。
# tar -zxvf terracotta-3.7.7.tar.gz # mv terracotta-3.7.7.tar.gz /usr/local/terracotta 开启terracotta服务: # /usr/local/terracotta/bin/start-tc-server.sh &
三:整合Tomcat,使之成为terracotta的客户端。
复制terracotta的相关jar包到Tomcat的lib目录下:(tomcat家目录以$TOMCAT_HOME替代)
# cp /usr/local/terracotta/common/terracotta-toolkit-1.6-runtime-5.7.0.jar $TOMCAT_HOME/lib/ # cp /usr/local/terracotta/sessions/terracotta-session-1.3.7.jar $TOMCAT_HOME/lib
修改context.xml文件,添加terracotta连接配置:
# vi $TOMCAT_HOME/conf/context.xml <ValveclassName="org.terracotta.session.TerracottaTomcat70xSessionValve"tcConfigUrl="192.168.1.225:9510"/>
集群中的Tomcat配置都基本如上。
四:配置nginx,使用loadblance方式访问后端tomcat。
# vi/usr/local/nginx/conf/nginx upstream session { server 192.168.1.225:8080 weight=5 max_fails=2 fail_timeout=30s; server 192.168.1.226:8080 weight=5 max_fails=2 fail_timeout=30s; } server { listen 80 default_server; server_name 0.0.0.0; location /session { proxy_passhttp://session; } }
五:开启tomcat、nginx。
13: # /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf 225:# $TOMCAT_HOME/bin/startup.sh 226:# $TOMCAT_HOME/bin/startup.sh
六:session测试。
在所有tomcat的session配置目录下,新建session测试页面。
#vi test.jsp <%@ pagesession="true" %> <html> <head> <title>test Host1</title><!-- //Host2就写为"test Host1" 以示区分 --> </head> <body> <% out.println("SessionId:"+request.getSession().getId()+"<br />"); out.println("CreationTime:"+request.getSession().getCreationTime()); Stringname=(String)session.getAttribute("name"); if(name==null||name.equals("")){ session.setAttribute("name","HelloHost1!"); //Host2就写为"Hello Host2!" out.println(session.getAttribute("name")); }else{ out.println(name); } %> </body> </html>
使用nginx跳转访问tomcat的test.jsp页面,效果如下:
刷新页面多次,可以清楚看到页面是在两个tomcat之间互相跳转。SessionId除了最后的标识改变外,其余的都保持一直,且内容value一直都是HelloHost2。证明了页面的session id 与内容都保持了一直,session共享是生效的。
另外,还可以在terracotta服务器上开启监控工具,来查看集群状态:
#/usr/local/terracotta/bin/dev-console.sh
Terracotta双机配置:
部署两台Terracotta服务器,在Terracotta目录下,新建tc-config.xml
#vi tc-config.xml <?xmlversion="1.0" encoding="UTF-8"?> <!--All content copyright Terracotta, Inc., unless otherwise indicated. All rights reserved. --> <tc:tc-config xsi:schemaLocation="http://www.terracotta.org/schema/terracotta-5.xsd" xmlns:tc="http://www.terracotta.org/config" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <servers> <!-- Sets where the Terracotta servercan be found. Replace the value of host with the server‘s IP address.--> <server host="192.168.1.225" name="Server1"> <data>%(user.home)/terracotta/server-data</data> <logs>%(user.home)/terracotta/server-logs</logs> </server> <!-- If using a standby Terracottaserver, also referred to as an ACTIVE-PASSIVEconfiguration, add the second server here. --> <server host="192.168.1.226" name="Server2"> <data>%(user.home)/terracotta/server-data</data> <logs>%(user.home)/terracotta/server-logs</logs> </server> <!--If using more than one server, add an <ha> section. --> <ha> <mode>networked-active-passive</mode> <networked-active-passive> <election-time>5</election-time> </networked-active-passive> </ha> </servers> <!-- Sets where the generated client logsare saved on clients. --> <clients> <logs>%(user.home)/terracotta/client-logs</logs> </clients> </tc:tc-config>
然后分别用该配置文件,开启terratocca服务。
225:
#/bin/start-tc-server.sh-f /usr/local/terracotta/tc-config.xml -n Server1 &
226:
#/bin/start-tc-server.sh-f /usr/local/terracotta/tc-config.xml -n Server2 &
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Terracotta+Tomcat+nginx实现session的共享