Docker安装

• 如果之前已经安装，先卸载旧版本的docker

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

• 设置存储库

yum install -y yum-utils

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

• 安装docker

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

• 启动docker

systemctl start docker

• 验证docker

docker run hello-world