AWS EKS Support

[phpdave11]

I would like to be able to use this plugin to deploy helm charts to my EKS cluster (Amazon Web Services Elastic Kubernetes Service).

Currently I am able to control my cluster within a concourse pipeline with kubectl using kubernetes-resource, but it would be nice to use helm to manage versions of my apps. In the kubernetes-resource plugin, I am able to authenticate using aws_iam_authenticator which is required for connecting to EKS.