一、卸载旧版本
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
二、安装需要的安装包和配置镜像仓库
yum install -y yum-utils
#使用阿里云会快一点
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
三、安装 Docker Engine-Community
yum install docker-ce docker-ce-cli containerd.io
一路y即可
四、测试是否安装成功
docker -v
systemctl start docker
docker run hello-world
出现以下内容说明成功
五、报错及解决办法
出现Error: Failed to download metadata for repo ‘base’: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried错误时,可能是没有安装在线源,执行以下命令
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
sed -i 's/$releasever/8/g' /etc/yum.repos.d/CentOS-Base.repo
#如果安装了就更新以下
yum clean all
yum makecache