容器数据卷：
方法一：使用命令挂载 -v
docker run -it -v 主机目录：容器内目录
测试：docker run -d -v /home/webapps:/usr/local/tomcat/webapps -p 8089:8080 --name tomcat01 tomcat:9.0
1.查看 docker inspect 容器ID
"Mounts": [
{
"Type": "bind",
"Source": "/home/webapps",
"Destination": "/usr/local/tomcat/webapps",
"Mode": "",
"RW": true,
"Propagation": "rprivate"
}
],
