1. 创建Dockerfile

[dongfeng@localhost test]$ cat Dockerfile 
FROM ubuntu:18.04

MAINTAINER The UbuntuOS Project <dongfeng@baicells.com>

ENV container docker
ENV LC_ALL C
ENV DEBIAN_FRONTEND noninteractive

RUN sed -i 's/# deb/deb/g' /etc/apt/sources.list

RUN apt-get update -yqq \
    && apt-get install -yq apt-utils \
    && apt-get install -yq curl \
    && apt-get install -yq git \
    && apt-get install -yq unzip zip tar \
    && apt-get install -yq ca-certificates \
    && apt-get install -yq bash-completion \
    && apt-get install -yq iproute2 iputils-ping \
    && apt-get install -yq systemd systemd-sysv \
    && apt-get clean \
    && apt-get autoclean \
    && apt-get autoremove \
    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

RUN cd /lib/systemd/system/sysinit.target.wants/ \
    && ls | grep -v systemd-tmpfiles-setup | xargs rm -f $1

RUN rm -f /lib/systemd/system/multi-user.target.wants/* \
    /etc/systemd/system/*.wants/* \
    /lib/systemd/system/local-fs.target.wants/* \
    /lib/systemd/system/sockets.target.wants/*udev* \
    /lib/systemd/system/sockets.target.wants/*initctl* \
    /lib/systemd/system/basic.target.wants/* \
    /lib/systemd/system/anaconda.target.wants/* \
    /lib/systemd/system/plymouth* \
    /lib/systemd/system/systemd-update-utmp*

VOLUME [ "/sys/fs/cgroup" ]

CMD ["/lib/systemd/systemd"]

2. 构造镜像

docker build -t ubuntu18.04-base .

3. 给镜像打tag

docker tag ubuntu18.04-base:latest workerwork/ubuntu18.04-base:latest

4.登录dockerhub

在web上登录创建新的仓库workerwork/ubuntu18.04-base，然后执行

docker login --username=workerwork

5.上传镜像

docker push workerwork/ubuntu18.04-base:latest

6.下载镜像

docker pull workerwork/ubuntu18.04-base:latest

7.使用镜像

sudo docker run -d  --privileged=true -v /sys/fs/cgroup:/sys/fs/cgroup --name=ubuntu workerwork/ubuntu18.04-base
sudo docker exec -it ubuntu /bin/bash