Docker相关, since 2020-04-12

对比虚拟机：
虚拟机，资源隔离；docker，线程调度各个docker服务。docker轻量级，启动速度快。

reference:
[1] https://www.zhihu.com/question/48174633
[2] https://zhuanlan.zhihu.com/p/53260098
[3] https://www.jianshu.com/p/61a5b43b35b4
[4] https://www.jianshu.com/p/50f48eb25215