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Ephemeral clusters for dev and CI/CD is the main use case right now but due to the fact that the pods don't take a performance hit - as you already mentioned - because they are scheduled in the underlying cluster, vclusters can also be a very interesting concept for production workloads, effectively sharding your k8s cluster into logical clusters / control planes.

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the only problem with this is needing to push your container images in CI before being able to schedule, as the real pod will a real node, which will need to pull a container.

In kind you can build container images into the single host, and avoid a container push/pull cycle. Any solns to that in vcluster?

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