1、首先cent7 基本是在vm上完全安装‘、
2、参考官方网站安装
1、https://wiki.centos.org/AdditionalResources/Repositories
OS requirements 操作环境准备
To install Docker CE, you need a maintained version of CentOS 7. Archived versions aren’t supported or tested.
The centos-extras repository must be enabled. This repository is enabled by default, but if you have disabled it, you need to re-enable it.
The overlay2 storage driver is recommended.
yum --enablerepo=extras install centos-release-scl
2、https://docs.docker.com/install/linux/docker-ce/centos/
$ sudo yum install -y yum-utils $ sudo yum-config-manager \
--add-repo \
https://docs.docker.com/v1.13/engine/installation/linux/repo_files/centos/docker.repo $ sudo yum-config-manager --enable docker-testing $ sudo yum makecache fast $ sudo yum -y install docker-engine
最后一步直接安装稳定版本
或者也可以安装指定版本：
查看有哪些版本可以安装 $ yum list docker-engine.x86_64 --showduplicates |sort -r docker-engine.x86_64 1.13.0-1.el7 docker-main
docker-engine.x86_64 1.12.5-1.el7 docker-main
docker-engine.x86_64 1.12.4-1.el7 docker-main
docker-engine.x86_64 1.12.3-1.el7 docker-main 安装指定版本 $ sudo yum -y install docker-engine-<VERSION_STRING>
测试：
Start Docker. $ sudo systemctl start docker
Verify that docker is installed correctly by running the hello-world image. $ sudo docker run hello-world