1、准备镜像文件 tomcat压缩包，jdk压缩包

2、编写dockerfile文件，官方命名Dockerfile，build 会自动寻找这个文件，就不需要-f 指定了！

FROM centos:7
MAINTAINER xiaowei<2541341974@qq.com>

COPY readme.txt /usr/local/readme.txt
ADD apache-tomcat-9.0.62.tar.gz /usr/local/
ADD jdk-8u291-linux-x64.tar.gz /usr/local/

RUN yum -y install vim

ENV MYPATH /usr/local
WORKDIR /usr/local
ENV JAVA_HOME /usr/local/jdk1.8.0_291
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV CATALINA_HOME /usr/local/apache-tomcat-9.0.62
ENV CATALINA_BASE /usr/local/apache-tomcat-9.0.62
ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin

EXPOSE 8080

CMD /usr/local/apache-tomcat-9.0.62/bin/startup.sh && tail -f /usr/local/apache-tomcat-9.0.62/logs/catalina.out

3、构建镜像

docker build -t dirtomcat .

4、启动镜像

docker run -d -p 9090:8080 --name xiaoweitomcat -v /root/tomcat/test:/usr/local/apache-tomcat-9.0.62/webapps/test -v /root/tomcat/tomcatlogs:/usr/local/apache-tomcat-9.0.62/logs diytomcat

5、访问测试
访问ip:9090，成功！