最近由于工作需要，公司需要部署 tomcat 集群，忙活了几天，终于配置了好了，做个笔记以后备用。
1. 下载 apache2 源码 http2.4.6
2. 配置 apache2 ./configure --prefix=/usr/local/apache2 --enable-modules=shared --enable-mods-shared=all --enable-proxy --enable-proxy-connect --enable-proxy-ftp --enable-proxy-http --enable-proxy-ajp --enable-proxy-balancer --enable-rewrite --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util/ --with-pcre=/usr/local/pcre
其中 apr ,apr-util, pcre 是安装依赖包，需要提前安装
3. 安装 apache2 root@qlserver03:/home/ryanwang/http2.4.6# make && make install
4 配置 load balance 修改 httpd.conf，文件末尾插入如下内容 ProxyRequests Off <Proxy balancer://mycluster> BalancerMember http://192.168.1.202:8080 loadfactor=1 route=jvm1 BalancerMember http://192.168.1.203:8080 loadfactor=1 route=jvm2 </Proxy> ProxyPass / balancer://mycluster/
正向代理需要关闭，主要是为了安全，“ProxyPass / balancer://mycluster/”
表示所有请求都交给 mycluster 来处理。
5 配置 tomcat7 修改 tomcat/conf/server.xml
<!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1"> <Engine name="Catalina" defaultHost="localhost">--> <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
另外一台服务器配置成 jvmRoute="jvm2"
6 应用的web.xml 文件需要增加一个元素 <distributable/>
到此 tomcat集群load balance 已经配置完成。下面配置 session 复制
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"> <Manager className="org.apache.catalina.ha.session.BackupManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true" mapSendOptions="6"/> <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="192.168.1.202" port="4000" 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>
其中修改把 manager元素的 <Manager className="org.apache.catalina.ha.session.DeltaManager" 修改为 <Manager className="org.apache.catalina.ha.session.BackupManager" 表示只有相同应用的tomcat之间才复制session。 <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="192.168.1.202" port="4000" autoBind="100" selectorTimeout="5000" maxThreads="6"/>
修改 receiver IP 地址和端口。
Tomcat 的详细介绍：请点这里 Tomcat 的下载地址：请点这里
