How old are they? What versions are they running?
We currently have ~15 Rails projects running in production. Most of them are Rails 4.1.8.
Some of them are just “micro-services” (not that small)
We use Docker for our containers and have a small Vulcand load-balancer running alongside our apps, which distributes the load.
We also have a couple of Elixir, Go, Sinatra, Django and Node apps running. Polyglot FTW.
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Tell me more about your docker experience and work flow…
What do you want to know?