全步骤：

[root@localhost ~]# yum install yum-utils device-mapper-persistent-data lvm2 -y
[root@localhost ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[root@localhost ~]# yum install -y docker-ce
[root@localhost ~]# systemctl stop firewalld.service
[root@localhost ~]# setenforce 0
[root@localhost ~]# systemctl start docker.service
[root@localhost ~]# systemctl enable docker.service
[root@localhost ~]# tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://w1ogxqvl.mirror.aliyuncs.com"]
}
EOF

[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl restart docker
[root@localhost ~]# docker pull centos:7
[root@localhost ~]# docker images
REPOSITORY            TAG                 IMAGE ID            CREATED             SIZE
centos                7                   5e35e350aded        6 weeks ago         203MB

[root@localhost ~]# ls
anaconda-ks.cfg   模板  图片  下载  桌面    initial-setup-ks.cfg  公共  视频  文档  音乐
[root@localhost ~]# mkdir tomcat
[root@localhost ~]# ls
anaconda-ks.cfg       tomcat  模板  图片  下载  桌面
initial-setup-ks.cfg  公共    视频  文档  音乐

`接下来的操作需要先把 jdk-8u91-linux-x64.tar.gz 和 apache-tomcat-9.0.16.tar.gz 两个压缩包 下载下来之后放在 /root/tomcat/ 目录下，再直接解压`
[root@localhost ~]# cd tomcat/
[root@localhost tomcat]# ls
jdk-8u91-linux-x64.tar.gz   apache-tomcat-9.0.16.tar.gz
[root@localhost tomcat]# tar zxvf jdk-8u91-linux-x64.tar.gz
[root@localhost tomcat]# tar zxvf apache-tomcat-9.0.16.tar.gz

[root@localhost tomcat]# vim Dockerfile
#基于基础镜像
FROM centos:7
MAINTAINER This is tomcat server

ADD jdk-8u91-linux-x64.tar.gz /root
RUN mv /root/jdk1.8.0_91/ /usr/local/jdk1.8
ENV JAVA_HOME=/usr/local/jdk1.8
ENV CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
ENV PATH=$JAVA_HOME/bin:$PATH

ADD apache-tomcat-9.0.16.tar.gz /root
RUN mv /root/apache-tomcat-9.0.16/ /usr/local/tomcat
RUN ln -s /usr/local/tomcat/bin/shutdown.sh /usr/local/bin/;ln -s /usr/local/tomcat/bin/startup.sh /usr/local/bin/

EXPOSE 8080
ENTRYPOINT /usr/local/tomcat/bin/startup.sh && /bin/bash && tail -f /usr/local/tomcat/logs/catalina.out

[root@localhost tomcat]# docker build -t tomcat:centos 
[root@localhost tomcat]# docker run -d -P tomcat:centos
61946199e564f72903d17f70d0d1d14627d7b01e5dc80a808936866c494fc1c5
[root@localhost tomcat]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                         PORTS                     NAMES
61946199e564        tomcat:centos       "/bin/sh -c '/usr/lo…"   12 seconds ago      Up 11 seconds                  0.0.0.0:32768->8080/tcp   quirky_wilbur
#端口为32768

验证：回到宿主机在浏览器中访问CentOS的IP地址的32768端口，看是否可以访问Tomcat主页