I work for an ISP and we are trying to write another success story ;) As an ISP, we have tons of constraints in terms of infrastructure. We're not allowed to use any public cloud services. At the same time, the in-house infrastructure is either too limited, or managed via spreadsheets by a bunch of dysfunctional teams.
For my team, Kubernetes has been truly a life saver when it comes to deploying applications. We're still working on making our cluster production-ready, but we're getting there very fast. Some people are already queuing up to get to deploy their applications on Kubernetes :D
What I especially love about Kubernetes is how solid the different concepts are and how they make you think differently about (distributed) systems.
It sure takes a lot of time to truly grasp it, and even more so to be confident managing and deploying it as Ops / SRE. But once you get it, it starts to feel like second nature.
Plus the benefits, in almost any possible way, are huge.
Best docs of all open source projects I've seen.
Although this is possible. I've never actually heard of anyone using this in production. Would be curious to know what kind of issues ppl run into with this in production.