根据docker官网提供的docker-compose安装教程，在ubuntu机器上安装最新的docker-compose，结果出现如下异常：
Failed to connect to github-production-release-asset-2e65be.s3.amazonaws.com port 443: 连接超时
安装过程如下：
$ sudo -i
root@far:~# curl -L https://github.com/docker/compose/releases/download/1.14.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 617 0 617 0 0 330 0 --:--:-- 0:00:01 --:--:-- 330
0 0 0 0 0 0 0 0 --:--:-- 0:02:12 --:--:-- 0curl: (7) Failed to connect to github-production-release-asset-2e65be.s3.amazonaws.com port 443: 连接超时
问题原因：
该地址(github-production-release-asset-2e65be.s3.amazonaws.com) 需要的一些下载的访问被 国内屏蔽了，需要设置下hosts文件，使用香港的服务器。
解决办法：
在hosts文件中，加入这一行：
219.76.4.4 github-cloud.s3.amazonaws.com
修改了hosts文件后，按照docker官网提供的docker-compose安装教程，重新安装，ok。
sudo -i
root@far:~# curl -L https://github.com/docker/compose/releases/download/1.15.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 617 0 617 0 0 327 0 --:--:-- 0:00:01 --:--:-- 327
100 8650k 100 8650k 0 0 18372 0 0:08:02 0:08:02 --:--:-- 16417
root@far:~# exit
对比了下美国、香港 ping的速度，发现美国的服务器延迟比较大
$ ping github-cloud.s3.amazonaws.com
PING github-cloud.s3.amazonaws.com (219.76.4.4) 56(84) bytes of data.
64 bytes from github-cloud.s3.amazonaws.com (219.76.4.4): icmp_seq=1 ttl=50 time=54.4 ms
64 bytes from github-cloud.s3.amazonaws.com (219.76.4.4): icmp_seq=2 ttl=51 time=90.9 ms
64 bytes from github-cloud.s3.amazonaws.com (219.76.4.4): icmp_seq=3 ttl=51 time=69.8 ms
64 bytes from github-cloud.s3.amazonaws.com (219.76.4.4): icmp_seq=4 ttl=50 time=38.5 ms
$ ping github-cloud.s3.amazonaws.com
PING s3-1-w.amazonaws.com (54.231.49.64) 56(84) bytes of data.
64 bytes from s3-1-w.amazonaws.com (54.231.49.64): icmp_seq=1 ttl=41 time=253 ms
64 bytes from s3-1-w.amazonaws.com (54.231.49.64): icmp_seq=3 ttl=41 time=253 ms
64 bytes from s3-1-w.amazonaws.com (54.231.49.64): icmp_seq=4 ttl=41 time=254 ms
64 bytes from s3-1-w.amazonaws.com (54.231.49.64): icmp_seq=5 ttl=41 time=253 ms
64 bytes from s3-1-w.amazonaws.com (54.231.49.64): icmp_seq=6 ttl=41 time=253 ms
参考：
http://www.mobibrw.com/2017/6047/comment-page-1
https://docs.docker.com/compose/install/#alternative-install-options