我正在使用jenkins官方的docker容器运行,根据https://docs.docker.com/engine/installation/linux/debian/上的指示,我有以下dockerfile
:
FROM jenkins:2.32.1
# install docker inside this container
USER root
# Install Docker inside Jenkins
RUN apt-get update
RUN apt-get purge "docker.io*"
RUN apt-get update
RUN apt-get install -y apt-transport-https ca-certificates gnupg2
RUN apt-key adv \
--keyserver hkp://ha.pool.sks-keyservers.net:80 \
--recv-keys 58118E89F3A912897C070ADBF76221572C52609D
RUN echo "deb https://apt.dockerproject.org/repo debian-jessie main" > /etc/apt/sources.list.d/docker.list
RUN apt-get update
RUN apt-cache policy docker-engine
RUN apt-get update
RUN apt-get install -y docker-engine
RUN gpasswd -a jenkins docker
USER jenkins
接下来我执行以下操作:
- 从此Dockerfile构建一个镜像
- 从该镜像运行一个容器
- 作为root用户在容器中执行bash
- 在容器内部的bash中运行
sudo docker service start
这是我的输出结果:
root@1e0f4b325d58:/# sudo service docker start
mount: permission denied
rmdir: failed to remove ‘cpu’: Read-only file system
mount: permission denied
rmdir: failed to remove ‘cpuacct’: Read-only file system
mount: permission denied
rmdir: failed to remove ‘net_cls’: Read-only file system
mount: permission denied
rmdir: failed to remove ‘net_prio’: Read-only file system
/etc/init.d/docker: 96: ulimit: error setting limit (Operation not permitted)