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Do your routine backend code releases require downtime? (lemm.ee)

submitted 1 year ago by koreth@lemm.ee to c/experienced_devs@programming.dev

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Curious to know how many people do zero-downtime deployment of backend code and how many people regularly take their service down, even if very briefly, to roll out new code.

Zero-downtime deployment is valuable in some applications and a complete waste of effort in others, of course, but that doesn't mean people do it when they should and skip it when it's not useful.

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[–] rev@ihax0r.com 2 points 1 year ago

Yeah zero downtime. You ship out the new features but gate them using some system you can control. When all the new features are shipped you turn up the new features until it gets to 100%. This lets you observe the real world behavior of the new features if they don’t cache well or cause 500s or what have you you can turn it off without having to ship new code.

Also if you keep all these feature flags, if you have a situation where you have capacity problems you can turn down features for the survival of the service as a whole.