It seems to me most of their challenges could be solved by replacing gke with self-managed k8s cluster specifically tuned for the use case. But then it sounded they had pretty barebones stack if they managed to pull off migration in a month
If self-managed Nomad was easier for them to configure than a managed K8s distribution, then a self-managed (possibly with custom patches) system probably would have been even worse.
There’s not a lot of knobs you can tune with gke. For example you can only choose out of two linux node image families, the control plane is not really tunable etc
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