docker 从容器中向主机拷贝数据：
sudo docker cp <containerId>:/file/path/within/container /host/path/target
/file/path/within/container : 容器里面的目录
/host/path/target : 主机目录
sudo docker cp 88fc08c48349:/opt/apache-tomcat-8.0.41/logs /opt/logs/
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从主机复制到容器：sudo docker cp host_path containerID:container_path
转载于:https://blog.51cto.com/xiaok007/1909202