Tomcat 工作原理和优化

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• 使用Tomcat部署虚拟主机

• 步骤一：配置服务器虚拟主机

• 1）修改server.xml配置文件，创建虚拟主机

[root@svr100 ~]# vim /usr/local/tomcat/conf/server.xml
… …
<Host name="www.test.com" appBase="test" unpackWARS="true" autoDeploy="true">
</Host>
<Host name="www.tomcat.com" appBase="tom" unpackWARS="true" autoDeploy="true">
</Host>

• 2）创建虚拟主机对应的页面根路径

[root@svr100 ~]# mkdir -p  /usr/local/tomcat/{test,tom}/ROOT
[root@svr100 ~]# echo “test.com”   > /usr/local/tomcat/test/ROOT/index.html
[root@svr100 ~]# echo “tomcat.com” > /usr/local/tomcat/tom/ROOT/index.html

• 3）重启Tomcat服务器

[root@svr100 ~]# /usr/local/tomcat/bin/catalina.sh stop
[root@svr100 ~]# /usr/local/tomcat/bin/catalina.sh start

4）客户端设置host文件，并浏览测试页面进行测试

[root@client ~]# vim /etc/hosts
… …
192.168.4.5    www.test.com  www.tomcat.com
[root@client ~]# firefox http://www.test.com:8080/
[root@client ~]# firefox http://www.tomcat.com:8080/

• 步骤二：配置Tomcat支持SSL加密网站

• 1）创建加密用的私钥和证书文件

[root@svr100 ~]# keytool -genkeypair -alias tomcat -keyalg RSA -keystore /usr/local/tomcat/keystore                //提示输入密码为:123456

• 2)再次修改server.xml配置文件，创建支持加密连接的Connector

[root@svr100 ~]# vim /usr/local/tomcat/conf/server.xml
… …
<Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
keystoreFile="/usr/local/tomcat/keystore" keystorePass="123456" clientAuth="false" sslProtocol="TLS" />

• 3）重启Tomcat服务器

[root@svr100 ~]# /usr/local/tomcat/bin/catalina.sh stop
[root@svr100 ~]# /usr/local/tomcat/bin/catalina.sh start

• 4）客户端设置host文件，并浏览测试页面进行测试

[root@client ~]# vim /etc/hosts
… …
192.168.4.5    www.test.com  www.tomcat.com
[root@client ~]# firefox https://www.test.com:8443/
[root@client ~]# firefox https://www.test.com:8443/

• 步骤二：配置Tomcat支持SSL加密网站

• 1)为每个虚拟主机设置不同的日志文件

[root@svr100 ~]# vim /usr/local/tomcat/conf/server.xml
<Host name="www.test.com" appBase="test" unpackWARS="true" autoDeploy="true">
      <Valve className="org.apache.catalina.valves.AccessLogValve"
               prefix="test_access" suffix=".log"
                        pattern="common"/>
</Host>
<Host name="www.tomcat.com" appBase="tom" unpackWARS="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve"
               prefix="tomcat_access" suffix=".log"
                        pattern="common"/>
</Host>

• 2）重启Tomcat服务器

[root@svr100 ~]# /usr/local/tomcat/bin/catalina.sh stop
[root@svr100 ~]# /usr/local/tomcat/bin/catalina.sh start

• 3）查看服务器日志文件

[root@svr100 ~]# tail /usr/local/tomcat/logs/test_access.log
[root@svr100 ~]# tail /usr/local/tomcat/logs/tomcat_access.log