1，安装docker
CentOS8 默认是会读取centos.org的mirrorlist的，所以一般来说是不需要配置镜像的。
step 1: 安装必要的一些系统工具
sudo yum install -y yum-utils device-mapper-persistent-data lvm2 dnf
step 2: 更新 container.io 包, 否则可能会报 package docker-ce-3:19.03.13-3.el7.x86_64 requires containerd.io >= 1.2.2-3, ...的错
可在 https://mirrors.aliyun.com/docker-ce/linux/centos/8/x86_64/stable/Packages/ 下找最新版安装
sudo dnf install -y --allowerasing https://mirrors.aliyun.com/docker-ce/linux/centos/8/x86\_64/stable/Packages/containerd.io-1.3.7-3.1.el8.x86\_64.rpm
Step 3: 安装Docker-CE
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
sudo yum install -y docker-ce
Step 4: 开启Docker服务并设置开机自启
sudo systemctl start docker && sudo systemctl enable docker
测试
docker version
2，安装docker-compose
sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose sudo chmod +x /usr/local/bin/docker-compose
测试
docker-compose --version
