tomcat集群初探

1.Apache的conf/httpd.conf尾部添加：

# 加载 mod_jk 模块

LoadModule jk_module modules/mod_jk.so

#

# Configure mod_jk

#

JkWorkersFile conf/workers.properties

JkMountFile conf/uriworkermap.properties

JkLogFile logs/mod_jk.log

JkLogLevel warn

2.uriworkermap.properties内容：

/*=lbworker

/jkstatus=status

!/*.gif=lbworker

!/*.jpg=lbworker

!/*.png=lbworker

!/*.css=lbworker

!/*.js=lbworker

!/*.htm=lbworker

!/*.html=lbworker

3.workers.properties内容：

# list the workers by name

worker.list=lbworker, status

# localhost server 1

# ------------------------

worker.worker2.port=9009

worker.worker2.host=localhost

worker.worker2.type=ajp13

worker.worker2.lbfactor=1

# localhost server 2

# ------------------------

worker.worker3.port=9010

worker.worker3.host=localhost

worker.worker3.type=ajp13

worker.worker3.lbfactor=1

#设置均衡策略

worker.lbworker.type=lb

worker.lbworker.balance_workers=worker2,worker3 #这里在的worker2、worker3为需要与tomcat设置的别名一致

worker.lbworker.sticky_session=1

worker.status.type=status

worker.retries=3

4.tomcat修改：

(1)worker2

<Connector port="9090" protocol="HTTP/1.1"

               connectionTimeout="20000"

               redirectPort="8443" />

<Engine name="Catalina" defaultHost="localhost" jvmRoute="worker2">

      ......

      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>

      ......

 </Engine>

(2)worker3

<Connector port="9091" protocol="HTTP/1.1"

               connectionTimeout="20000"

               redirectPort="8443" />

<Engine name="Catalina" defaultHost="localhost" jvmRoute="worker3">

      ......

      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>

      ......

 </Engine>