Docker（具有SYSTEMCTL的CentOS 7）：无法挂载tmpfs&小组 [英] Docker (CentOS 7 with SYSTEMCTL) : Failed to mount tmpfs & cgroup

问题描述

（我是Docker初学者。然后我遵循了一些CentOS-7教程）

在我的 CentOS 7.2 ，我尝试按照以下步骤学习Docker。

In my CentOS 7.2, I tried to learn Docker by following the steps below.

# docker version

Client:
 Version:      1.10.3
 API version:  1.22
 Go version:   go1.5.3
 Git commit:   20f81dd
 Built:        Thu Mar 10 15:39:25 2016
 OS/Arch:      linux/amd64

Server:
 Version:      1.10.3
 API version:  1.22
 Go version:   go1.5.3
 Git commit:   20f81dd
 Built:        Thu Mar 10 15:39:25 2016
 OS/Arch:      linux/amd64

# docker pull centos:latest
# docker images
centos     latest    778a53015523    12 days ago    196.7 MB

# mkdir ~/docker/centos7-systemd
# cd ~/docker/centos7-systemd
# vi Dockerfile
FROM centos
MAINTAINER "XXXX XXXX" <[e-mail]>
ENV container docker
RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
rm -f /lib/systemd/system/multi-user.target.wants/*;\
rm -f /etc/systemd/system/*.wants/*;\
rm -f /lib/systemd/system/local-fs.target.wants/*; \
rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
rm -f /lib/systemd/system/basic.target.wants/*;\
rm -f /lib/systemd/system/anaconda.target.wants/*;
VOLUME [ "/sys/fs/cgroup" ]
CMD ["/usr/sbin/init"]

# docker build --rm -t local/centos7-systemd .
..
Successfully built 1a9f1c4938b3

# docker images
centos                  latest    778a53015523    12 days ago    196.7 MB
local/centos7-systemd   latest    1a9f1c4938b3    8 seconds ago  196.7 MB

到目前为止，一切都似乎正常。

现在问题在我运行时出现：

So up to this point, everything (seems) ok.
Now the problem comes when I run:

# docker run -ti -v /sys/fs/cgroup:/sys/fs/cgroup:ro -p 80:80 local/centos7-systemd
Failed to mount tmpfs at /run: Operation not permitted
Failed to mount cgroup at /sys/fs/cgroup/systemd: Operation not permitted
[!!!!!!] Failed to mount API filesystems, freezing.

这甚至意味着什么，更重要的是，正在发生什么以及如何解决请？

What does this even mean, and more importantly, what is happening and how can I solve this, please?

谢谢大家：）

推荐答案

尝试以特权模式运行容器：

try to run your container in privileged mode:

docker run -ti --privileged=true -v /sys/fs/cgroup:/sys/fs/cgroup:ro -p 80:80 local/centos7-systemd

这应该可以解决您的问题

this should solve your problem

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