关于Volumes和SELinux的完整故事，请参阅Project Atomic的博客文章。

具体地说:

This got easier recently since Docker finally merged a patch which will be showing up in docker-1.7 (We have been carrying the patch in docker-1.6 on RHEL, CentOS, and Fedora). This patch adds support for "z" and "Z" as options on the volume mounts (-v). For example: docker run -v /var/db:/var/db:z rhel7 /bin/sh Will automatically do the chcon -Rt svirt_sandbox_file_t /var/db described in the man page. Even better, you can use Z. docker run -v /var/db:/var/db:Z rhel7 /bin/sh This will label the content inside the container with the exact MCS label that the container will run with, basically it runs chcon -Rt svirt_sandbox_file_t -l s0:c1,c2 /var/db where s0:c1,c2 differs for each container.

这是SELinux的问题。

你可以临时发行

su -c "setenforce 0"

在主机上访问或通过运行添加SELinux规则

chcon -Rt svirt_sandbox_file_t /path/to/volume

警告:此解决方案存在安全风险。

尝试以特权模式运行容器:

sudo docker run --privileged=true -i -v /data1/Downloads:/Downloads ubuntu bash

另一种选择(我没有尝试过)是创建一个特权容器，然后在其中创建非特权容器。

我也遇到过类似的问题。我的错误是由于主机的UID和容器用户的UID不匹配造成的。解决方法是将用户的UID作为参数传递给docker build命令，并使用相同的UID创建容器的用户。

在DockerFile中:

ARG UID=1000
ENV USER="ubuntu"
RUN useradd -u $UID -ms /bin/bash $USER

在构建步骤中:

docker build <path/to/Dockerfile> -t <tag/name> --build-arg UID=$UID

在那之后，根据OP运行容器和命令给了我预期的结果。

我验证了chcon -Rt svirt_sandbox_file_t /path/to/volume可以工作，并且您不必作为特权容器运行。

这是:

Docker版本0.11.1-dev, build 02d20af/0.11.1 CentOS 7作为主机和容器，并启用SELinux。

从access.redhat.com: Sharing_Data_Across_Containers:

Host volume settings are not portable, since they are host-dependent and might not work on any other machine. For this reason, there is no Dockerfile equivalent for mounting host directories to the container. Also, be aware that the host system has no knowledge of container SELinux policy. Therefore, if SELinux policy is enforced, the mounted host directory is not writable to the container, regardless of the rw setting. Currently, you can work around this by assigning the proper SELinux policy type to the host directory": chcon -Rt svirt_sandbox_file_t host_dir Where host_dir is a path to the directory on host system that is mounted to the container.

这似乎只是一种变通办法，但我试过了，而且奏效了。