java - Apache Tomcat 负载均衡集群

Question

我有 3 台安装了 Ubuntu 的服务器，我想配置 Tomcat 负载平衡。

Server A = 10.0.0.1,
Server B = 10.0.0.2,
Server C = 10.0.0.3

我已将域指向安装了 Apache 和 Mod_JK 的服务器 A。而服务器 B 和 C 有 Apache Tomcat 8。下面是我的 workers.properties 文件的详细信息

workers.apache_log=/var/log/apache2 worker.list=tomcatlb,status
worker.stat1.type=status

worker.tomcat1.type=ajp13 worker.tomcat1.host=10.0.0.2 #put your app
host here worker.tomcat1.port=8009 worker.tomcat2.type=ajp13 
worker.tomcat2.host=10.0.0.3 worker.tomcat2.port=8009

worker.tomcat1.lbfactor=1  worker.tomcat2.lbfactor=1 

worker.tomcatlb.type=lb
worker.tomcatlb.balance_workers=tomcat1,tomcat2

worker.list=jkstatus worker.jkstatus.type=status

我还在 Apache Tomcat 的 server.xml 中使用 jvmRounte 名称作为 tomcat1 和 tomcat2。

我还在 server.xml 中添加了以下行

      <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2">

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

        <Sender     className="org.apache.catalina.tribes.transport.ReplicationTransmitter">

        <Transport     className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>

        </Sender> 

        <Receiver     className="org.apache.catalina.tribes.transport.nio.NioReceiver"
        address="auto" port="4001" autoBind="100"
        selectorTimeout="5000" maxThreads="6"/> 

        <Interceptor     className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>

        <Interceptor     className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interc    eptor"/>
        <Interceptor     className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>


        </Channel>

context.xml 如下所示

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!-- The contents of this file will be loaded for each web application -->
<Context>

<!-- Default set of monitored resources. If one of these changes, the -->
<!-- web application will be reloaded. -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>

<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />
-->

<!-- Uncomment this to enable Comet connection tacking (provides events
on session expiration as well as webapp lifecycle) -->
<!--
<Valve className="org.apache.catalina.valves.CometConnectionManagerValve" />
-->

<Manager className="org.apache.catalina.ha.session.DeltaManager"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>
<Manager className="org.apache.catalina.ha.session.BackupManager" />

</Context>

apache 配置有以下几行

 RewriteEngine on
    RewriteRule ^/$ /test [PT,L]
    JkMount /* tomcatlb

apache 通过 mod_jk 将请求重定向到 Tomcat，它工作正常，但是当一个 tomcat 出现故障时，它应该将请求重定向到另一个 tomcat，而不是我必须重新登录，因为它没有复制 session 。

Answer 1

我发现你不见了 stickysession=JSESSIONID|jsessionid lbmethod=byrequests nofailover=Off connectiontimeout=5 timeout=30