[tomcat]集群配置以及联合apache httpd实现负载均衡

超、凢脫俗 2021-11-18 01:16 245阅读 0赞

环境：  
CentOS release 6.4 (Final)  
uname -r: 2.6.32-358.el6.x86\_64  
httpd: httpd-2.2.15-26.el6.centos.x86\_64  
java: Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)  
tomcat: apache-tomcat-6.0.37  
tomcat connector: /etc/httpd/modules/mod\_jk.so, from tomcat-connectors-1.2.37-src.tar.gz  
  
  
一、配置tomcat集群  
1.修改tomcat/conf/server.xml（一个用默认的端口，另一个所有端口+1000）

jvmRoute的值和后续的worker名称一致  
在Engine中加入Cluster,Receiver中的address替换为自己的ip地址

2.修改web.xml文件  
增加一行<distributable/>  
启动tomcat,一个控制台显示Replication member added:org.apache.catalina.tribes.membership.MemberImpl表示集群成功

二、配置apache http连接到tomcat，配置负载均衡

1.修改/etc/httpd/conf/httpd.conf,文件的最后添加如下内容

# Load mod_jk module
    LoadModule    jk_module  modules/mod_jk.so
    # Where to find workers.properties
    # Update this path to match your conf directory location (put workers.properties next to httpd.conf)
    JkWorkersFile conf/workers.properties
    # Where to put jk shared memory
    # Update this path to match your local state directory or logs directory
    JkShmFile     /var/log/httpd/mod_jk.shm
    # Where to put jk logs
    # Update this path to match your logs directory location (put mod_jk.log next to access_log)
    JkLogFile     /var/log/httpd/mod_jk.log
    # Set the jk log level [debug/error/info]
    JkLogLevel    info
    # Select the timestamp log format
    JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
    # Send everything for context /examples to worker named worker1 (ajp13)
    JkMount /* controller

2.新建文件/etc/httpd/conf/workers.properties,文件内容如下

worker.list=tomcat1, tomcat2, controller
    
    
    worker.tomcat1.type=ajp13
    worker.tomcat1.host=localhost
    worker.tomcat1.port=8009
    worker.tomcat1.lbfactor=1
    
    
    worker.tomcat2.type=ajp13
    worker.tomcat2.host=localhost
    worker.tomcat2.port=9009
    worker.tomcat2.lbfactor=1
    
    
    worker.controller.type=lb
    worker.controller.balance_workers=tomcat1, tomcat2
    worker.controller.sticky_session=1

3.重启httpd  
service httpd stop  
service httpd start  
4.测试负载均衡  
不能通过刷新F5来测试，linux下面可以用ab工具  
ab -n 10000 -c 200 http://192.168.72.134/cluster/  
\-n访问量  
\-c并发数