[joevandyk]

How do you deploy updates to the docker containers without downtime?

[xet7]

For example with Docker Swarm: http://container-solutions.com/rolling-updates-with-docker-s...

Some companies have GitLab workflows that also deploy successfull builds automatically, checks are there problems in that deploy, and rollbacks automatically when needed: https://twit.tv/shows/floss-weekly/episodes/473?autostart=fa...

Such workflows could also be made with for example: - Huginn https://github.com/huginn/huginn - Flogo http://www.flogo.io

[sheraz]

Well, the trick is that I have downtime but it last for only a few seconds.

  Docker pull <image name>
  Docker container stop <container name>
  Docker run <opts> <image name>

This does result in a “hiccup” for any clients wanting to connect. They will see a 502 gateway error at which point they should retry with exponential backoff.

And that is the trick — make the client retry with the exponential backoff. Document it as the expected behavior when that event arises. And for our traffic patterns this is acceptable.