docker部署web服务，怎样做到不间断服务的更新？

Question

用docker+jenkins+git+fabric做了一套自动化部署的小项目，公司中有web服务已经在docker中运行，怎样做到不间断服务更新项目代码？

Answer 1

Hang an nginx as a proxy in front, and update the nginx configuration to a different port each time, then cut off all traffic and kill the old docker

Answer 2

Hang another nginx in front to act as proxy