1、Centos7安装Docker

1.1 确定Centos版本是否是7及以上

cat /etc/redhat-release

1.2 卸载旧版本

sudo dnf remove docker \docker-client \docker-client-latest \docker-common \docker-latest \docker-latest-logrotate \docker-logrotate \docker-engine

1.3 yum安装gcc相关

yum -y install gcc

yum -y install gcc-c++

1.4 安装需要的软件包

​​​​​​​yum install -y yum-utils

1.5 ​​​​​​​设置stable镜像仓库

​​​​​​​yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

1.6 更新yum软件包索引

​​​​​​​yum makecache fast

1.7 ​​​​​​​安装DOCKER CE

​​​​​​​yum -y install docker-ce docker-ce-cli containerd.io

1.7.1 执行结果

 

1.8 启动Docker

​​​​​​​systemctl start docker

1.9 测试

docker version

 1.9.1 测试结果

2、Centos7卸载Docker

​​​​​​​systemctl stop docker

​​​​​​​yum remove docker-ce docker-ce-cli containerd.io

​​​​​​​rm -rf /var/lib/docker

​​​​​​​rm -rf /var/lib/containerd