tomcat发布应用，及JVM配置

一、tomcat 发布多个应用

1. 同一端口下发布多个应用，如果需要不带端口，可以设置端口为80，多个host的name一定不能相同

  <Service name="Catalina">
    <Connector port="80" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
    <Engine name="Catalina" defaultHost="localhost">
      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>
      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <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" />
		<Context docBase="tbp" path="" debug="0" reloadable="true" />
      </Host>
	  <Host name="127.0.0.1"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <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" />
		<Context docBase="tbp2" path="" debug="0" reloadable="true" />
      </Host>
    </Engine>
  </Service>

如果应用访问需要加上context：

  <Service name="Catalina">
    <Connector port="80" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
    <Engine name="Catalina" defaultHost="localhost">
      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>
      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <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" />
		<Context docBase="tbp" path="/tbp" debug="0" reloadable="true" />
      </Host>
	  <Host name="127.0.0.1"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <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" />
		<Context docBase="tbp2" path="/tbp2" debug="0" reloadable="true" />
      </Host>
    </Engine>
  </Service>

2. 如果不同的应用需要对应不同的端口，可以将多个应用分别放到多个tomcat下，也可以在server.xml中进行配置

<Service name="tbp">
    <Connector port="2080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <Connector port="2009" protocol="AJP/1.3" redirectPort="8443" />
    <Engine name="tbp" defaultHost="localhost">
      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>
      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <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" />
		<Context docBase="tbp" path="" debug="0" reloadable="true" />
      </Host>
    </Engine>
  </Service>
  
  <Service name="tbp2">
    <Connector port="3080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <Connector port="3009" protocol="AJP/1.3" redirectPort="8443" />
    <Engine name="tbp2" defaultHost="localhost">
      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>
      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <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" />
		<Context docBase="tbp2" path="" debug="0" reloadable="true" />
      </Host>
    </Engine>
  </Service>

但如果配置多个应用，可能会出现内存溢出的错误，这时需要调整Catalina.bat中设置的JVM大小：

在rem ----- Execute The Requested Command ---------------------------------------后调整

Linux下修改JVM内存大小:

要添加在tomcat 的bin 下catalina.sh 里，位置cygwin=false前。注意引号要带上,红色的为新添加的.

# OS specific support. $var _must_ be set to either true or false.
JAVA_OPTS="-Xms256m -Xmx512m -Xss1024K -XX:PermSize=128m -XX:MaxPermSize=256m"
cygwin=false

windows下修改JVM内存大小:

情况一:解压版本的Tomcat, 要通过startup.bat启动tomcat才能加载配置

要添加在tomcat 的bin 下catalina.bat 里

rem Guess CATALINA_HOME if not defined
set CURRENT_DIR=%cd%后面添加,红色的为新添加的.

set JAVA_OPTS=-Xms256m -Xmx512m -XX:PermSize=128M -XX:MaxNewSize=256m -XX:MaxPermSize=256m -Djava.awt.headless=true

具体大小，可以根据实际情况调整。

tomcat发布应用，及JVM配置

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