centos7.x系统安装docker完整步骤

yum remove docker 
                  docker-client 
                  docker-client-latest 
                  docker-common 
                  docker-latest 
                  docker-latest-logrotate 
                  docker-logrotate 
                  docker-engine

2.关闭防火墙

systemctl stop firewalld    # 关闭防火墙
systemctl disable firewalld # 设置防火墙禁止开机启动

3.关闭selinux

vi /etc/selinux/config   # 编辑这个文件,改为如下:

setenforce 0  # 使修改生效

4.安装docker依赖

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

5.配置docker的源

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

6.安装docker-ce

yum -y install docker-ce

7.启动docker

systemctl start docker

8.设置docker开机启动

systemctl enable docker

9.测试

docker pull nginx