Metric server version compatibility with EKS

[Thanos Avenger]

Hi,

I'm a bit confused with the version compatibility mentioned in the metric-server repo;  https://github.com/kubernetes-sigs/metrics-server.

I'm currently upgrading the EKS version from 1.14 to 1.15 and would like to check the supported version for the k8s 1.15.

[Marek Siarkowicz]

Metrics API Beta that Metrics Server depends on was introduced in Kubernetes 1.8.
There was no major changes in API since, thus it should work Kubernetes 1.8+ assuming that cluster fulfils https://github.com/kubernetes-sigs/metrics-server#requirements

Before upgrading your EKS version I would recommend some testing. Vendors like EKS can introduce cluster configuration changes that could break Metrics Server requirements mentioned above or require configuration changes. 

If you cannot do upgrade testing I would recommend to use Metrics Server version v0.3.6 listed in EKS documentation https://docs.aws.amazon.com/eks/latest/userguide/metrics-server.html as it should be most commonly used and tested.

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