阿里云服务器安装docker命令

不用按顺序执行

yum install -y yum-utils device-mapper-persistent-data alinux3-plus | dnf install dnf-plugin-releasever-adapter --repo alinux3-plus
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce

可能出现问题：
一、Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

systemctl status docker
sudo systemctl start docker