在线安装：
curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
离线安装：
下载[docker-compose-Linux-x86_64](https://github.com/docker/compose/releases/download/1.8.1/docker-compose-Linux-x86_64)，然后重新命名添加可执行权限即可：
mv docker-compose-Linux-x86_64 /usr/local/bin/docker-compose chmod +x /usr/local/bin/docker-compose