We build an open source solution[1] to deploy autonomous Kubernetes clusters into on-prem or air-gapped environments but it's also useful for limiting cloud lock-in (even has its own "IAM" built in). Of course, you have to also limit your use of proprietary services (which definitely has its trade-offs) but might be worth poking around if you believe reducing lock-in is worth it.
We build an open source solution[1] to deploy autonomous Kubernetes clusters into on-prem or air-gapped environments but it's also useful for limiting cloud lock-in (even has its own "IAM" built in). Of course, you have to also limit your use of proprietary services (which definitely has its trade-offs) but might be worth poking around if you believe reducing lock-in is worth it.
[1] https://github.com/gravitational/gravity