因为DockerCE（社区版）不支持在RHCE上安装，所以本次操作系统选择Centos7.4。 Centos7的repo采用阿里云提供的：
wget -O /etc/yum.repos.d/Centos-7.repo http://mirrors.aliyun.com/repo/Centos-7.repo一、从docker官网下载需要的dockerCE安装包
https://download.docker.com/linux/centos/7/x86_64/stable/Packages/
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-18.09.6-3.el7.x86_64.rpm wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-18.09.6-3.el7.x86_64.rpm wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.3.ce-1.el7.noarch.rpm,或者是下载dockerCE的repo文件：
wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo经尝试，用rpm包依赖太多，这里还是采用repo的方式
yum install dock*.rpm //省略 --> Finished Dependency Resolution Error: Package: 3:docker-ce-18.09.6-3.el7.x86_64 (/docker-ce-18.09.6-3.el7.x86_64) Requires: container-selinux >= 2.9 You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest二、通过yum安装docker
yum search docker yum install docker-ce -y三、启动docker服务
systemctl start docker systemctl enable docker其他tips：
一、创建容器的时候报错WARNING: IPv4 forwarding is disabled. Networking will not work.
# vim /usr/lib/sysctl.d/00-system.conf 添加如下代码： net.ipv4.ip_forward=1 重启network服务 # systemctl restart network完成以后，删除错误的容器，再次创建新容器，就不再报错了。
二、容器的停用、删除等基本操作
1.停用全部运行中的容器: docker stop $(docker ps -q) 2.删除全部容器： docker rm $(docker ps -aq) 3.一条命令实现停用并删除容器： docker stop $(docker ps -q) & docker rm $(docker ps -aq)
参考文档：
https://www.cnblogs.com/syxlb/p/9903512.html
https://mirrors.tuna.tsinghua.edu.cn/help/docker-ce/
https://blog.csdn.net/yjk13703623757/article/details/68939183
https://blog.csdn.net/jeikerxiao/article/details/78476925
