[原创]同一个Tomcat，配置多个context、多个Host

需求前提：

系统结束后，需要部署到服务器上。

目前只可以映射到一个固定IP的非80端口。

而server端和web端都要暴露到外网。

所以配置两个context，使得client应用不需要添加服务名，直接使用IP即可访问；server可以通过http://xxx/server进行访问。

见下文：

<?xml version='1.0' encoding='utf-8'?>
<!--Licensed to the Apache Software Foundation (ASF) under one or morecontributor license agreements.  See the NOTICE file distributed withthis work for additional information regarding copyright ownership.The ASF licenses this file to You under the Apache License, Version 2.0(the "License"); you may not use this file except in compliance withthe License.  You may obtain a copy of the License athttp://www.apache.org/licenses/LICENSE-2.0Unless required by applicable law or agreed to in writing, softwaredistributed 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 andlimitations under the License.
-->
<!-- Note:  A "Server" is not itself a "Container", so you may notdefine subcomponents such as "Valves" at this level.Documentation at /docs/config/server.html-->
<Server port="8005" shutdown="SHUTDOWN"><Listener className="org.apache.catalina.startup.VersionLoggerListener" /><!-- Security listener. Documentation at /docs/config/listeners.html<Listener className="org.apache.catalina.security.SecurityListener" />--><!--APR library loader. Documentation at /docs/apr.html --><Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /><!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html --><Listener className="org.apache.catalina.core.JasperListener" /><!-- Prevent memory leaks due to use of particular java/javax APIs--><Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /><Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /><Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" /><!-- Global JNDI resourcesDocumentation at /docs/jndi-resources-howto.html--><GlobalNamingResources><!-- Editable user database that can also be used byUserDatabaseRealm to authenticate users--><Resource name="UserDatabase" auth="Container"type="org.apache.catalina.UserDatabase"description="User database that can be updated and saved"factory="org.apache.catalina.users.MemoryUserDatabaseFactory"pathname="conf/tomcat-users.xml" /></GlobalNamingResources><!-- A "Service" is a collection of one or more "Connectors" that sharea single "Container" Note:  A "Service" is not itself a "Container",so you may not define subcomponents such as "Valves" at this level.Documentation at /docs/config/service.html--><Service name="Catalina"><!--The connectors can use a shared executor, you can define one or more named thread pools--><!--<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"maxThreads="150" minSpareThreads="4"/>--><!-- A "Connector" represents an endpoint by which requests are receivedand responses are returned. Documentation at :Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)Java AJP  Connector: /docs/config/ajp.htmlAPR (HTTP/AJP) Connector: /docs/apr.htmlDefine a non-SSL HTTP/1.1 Connector on port 8080--><Connector port="8080" protocol="HTTP/1.1"connectionTimeout="20000"redirectPort="8443" /><!-- A "Connector" using the shared thread pool--><!--<Connector executor="tomcatThreadPool"port="8080" protocol="HTTP/1.1"connectionTimeout="20000"redirectPort="8443" />--><!-- Define a SSL HTTP/1.1 Connector on port 8443This connector uses the BIO implementation that requires the JSSEstyle configuration. When using the APR/native implementation, theOpenSSL style configuration is required as described in the APR/nativedocumentation --><!--<Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol"maxThreads="150" SSLEnabled="true" scheme="https" secure="true"clientAuth="false" sslProtocol="TLS" />--><!-- Define an AJP 1.3 Connector on port 8009 --><Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /><!-- An Engine represents the entry point (within Catalina) that processesevery request.  The Engine implementation for Tomcat stand aloneanalyzes the HTTP headers included with the request, and passes themon to the appropriate Host (virtual host).Documentation at /docs/config/engine.html --><!-- You should set jvmRoute to support load-balancing via AJP ie :<Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">--><Engine name="Catalina" defaultHost="localhost"><!--For clustering, please take a look at documentation at:/docs/cluster-howto.html  (simple how to)/docs/config/cluster.html (reference documentation) --><!--<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>--><!-- Use the LockOutRealm to prevent attempts to guess user passwordsvia a brute-force attack --><Realm className="org.apache.catalina.realm.LockOutRealm"><!-- This Realm uses the UserDatabase configured in the global JNDIresources under the key "UserDatabase".  Any editsthat are performed against this UserDatabase are immediatelyavailable for use by the Realm.  --><Realm className="org.apache.catalina.realm.UserDatabaseRealm"resourceName="UserDatabase"/></Realm><Host name="localhost"  appBase="webapps"unpackWARs="true" autoDeploy="true"xmlValidation="false" xmlNamespaceAware="false"><Context path="" docBase="client" reloadable="true" crossContext="true" /> <Context path="/server" docBase="server" reloadable="true" crossContext="true" /> </Host></Engine></Service>
</Server>

 以下是两个域名映射到Tomcat上的两个应用的server.xml的配置。

这种配置方案会存在以下问题：

在webapps和webapps1中会自动生成名称为ROOT的应用，代码就是自己指定的docBase的路径下对应的应用。

<Host name="www.a.com"  appBase="webapps"unpackWARs="true" autoDeploy="true"><Context path="" docBase="E:/apache-tomcat-7.0.73/a" /><Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"prefix="localhost_access_log." suffix=".txt"pattern="%h %l %u %t &quot;%r&quot; %s %b" /></Host><Host name="www.b.com"  appBase="webapps1"unpackWARs="true" autoDeploy="true"><Context path="" docBase="E:/apache-tomcat-7.0.73/b" /><Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"prefix="localhost_access_log." suffix=".txt"pattern="%h %l %u %t &quot;%r&quot; %s %b" /></Host>