100%无压力学会安装Docker

1.更新yum

yum update

2.卸载旧版本(如果安装过旧版本的话)

yum remove -y docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

3.安装需要的软件包， yum-util 提供yum-config-manager功能，另外两个是devicemapper驱动依赖的

yum install -y yum-utils device-mapper-persistent-data lvm2

4.添加Docker的存储库

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

5.安装Docker

yum install -y docker-ce
#也可以安装指定版本 yum install docker-ce-17.12.0.ce

6.启动Docker并加入开机启动

systemctl start docker
systemctl enable docker

7.验证安装

docker version

显示以下信息说明安装没问题！

docker version 
 Client:
  Version:    17.12.1-ce
  API version:    1.35
  Go version:    go1.9.4
  Git commit:    7390fc6
  Built:    Tue Feb 27 22:15:20 2018
  OS/Arch:    linux/amd64
 
 Server:
  Engine:
   Version:    17.12.1-ce
   API version:    1.35 (minimum version 1.12)
   Go version:    go1.9.4
   Git commit:    7390fc6
   Built:    Tue Feb 27 22:17:54 2018
   OS/Arch:    linux/amd64
   Experimental:    false

8.Docker重启

systemctl restart docker