如何在Docker容器内外互相拷贝数据

1.用-v挂载主机数据卷到容器内

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docker run -v /path/to/hostdir:/mnt $container
在容器内拷贝
cp /mnt/sourcefile /path/to/destfile

2.直接在主机上拷贝到容器物理存储系统

A. 获取容器名称或者id :

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$ docker ps

B. 获取整个容器的id

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$ docker inspect -f '{{.Id}}' 步骤A获取的名称或者id

C. 在主机上拷贝文件:

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$ sudo cp path-file-host /var/lib/docker/aufs/mnt/FULL_CONTAINER_ID/PATH-NEW-FILE
或者
$ sudo cp path-file-host /var/lib/docker/devicemapper/mnt/123abc<>/rootfs/root

例子：

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$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

d8e703d7e303 solidleon/ssh:latest /usr/sbin/sshd -D cranky_pare

$ docker inspect -f '{{.Id}}' cranky_pare

or
$ docker inspect -f '{{.Id}}' d8e703d7e303

d8e703d7e3039a6df6d01bd7fb58d1882e592a85059eb16c4b83cf91847f88e5

$ sudo cp file.txt /var/lib/docker/aufs/mnt/**d8e703d7e3039a6df6d01bd7fb58d1882e592a85059eb16c4b83cf91847f88e5

3.用输入输出符

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docker run -i ubuntu /bin/bash -c 'cat > /path/to/container/file' < /path/to/host/file/

或者

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docker exec -it bash -c 'cat > /path/to/container/file' < /path/to/host/file/